MAXM17632AME+T [MAXIM]
4.5V to 36V, 1A Himalaya uSLIC Step-Down Power Module;
| 型号： | MAXM17632AME+T |
| 厂家： | 
MAXIM INTEGRATED PRODUCTS |
| 描述： | 4.5V to 36V, 1A Himalaya uSLIC Step-Down Power Module |
| 文件： | 总32页 (文件大小：1890K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
EVALUATION KIT AVAILABLE
Click here for production status of specific part numbers.
MAXM17630/MAXM17631/
MAXM17632
4.5V to 36V, 1A Himalaya uSLIC
Step-Down Power Module
General Description
Benefits and Features
● Easy to Use
The Himalaya series of voltage regulator ICs and power
modules enable cooler, smaller, and simpler power supply
solutions. The MAXM17630/MAXM17631/MAXM17632
are a family of high-efficiency, synchronous step-down
DC-DC modules with integrated controller, MOSFETs,
compensation components and inductor that operate
over a wide input-voltage range. The modules operate
from 4.5V to 36V and deliver up to 1A output current.
The MAXM17630 and MAXM17631 are fixed 3.3V and
5V output modules, respectively. The MAXM17632 is an
adjustable output (0.9V to 12V) module. The modules sig-
nificantly reduce design complexity, manufacturing risks,
and offer a true plug-and-play power-supply solution,
reducing time-to-market. Built-in compensation across
the output-voltage range eliminates the need for external
compensation components.
• Wide 4.5V to 36V Input
• Adjustable 0.9V to 12V Output (MAXM17632)
• Fixed 3.3V and 5V output versions (MAXM17630
and MAXM17631)
• 400kHz to 2.2MHz Adjustable Frequency with
External Clock Synchronization
• ±1.2% Feedback Accuracy
• Up to 1A Output Current
• Internally Compensated
• All Ceramic Capacitors
● High Efficiency
• Selectable PWM-, PFM- or DCM-Mode
of Operation
• Auxiliary Bootstrap Supply (EXTVCC) for Improved
Efficiency
• Shutdown Current as Low as 2.8μA (typ)
These modules feature peak-current-mode control
architecture. The modules can be operated in pulse-
width modulation (PWM), or pulse-frequency modu-
lation (PFM), or discontinuous-conduction mode
(DCM) to enable high efficiency under light-load
conditions.
● Flexible Design
• Adjustable and Monotonic Startup with Prebiased
Output Voltage
• Built-In Output-Voltage Monitoring with RESET Pin
• Programmable EN/UVLO Threshold
The feedback-voltage regulation accuracy over -40°C
to +125°C for the module family is ±1.2%. These power
modules are available in a low profile, compact 16-pin,
3mm x 3mm x 1.75mm, uSLIC™ package. Simulation
Models are available.
● Robust Operation
• Hiccup-Mode Overload Protection
• Overtemperature Protection
• -40°C to +125°C Ambient Operating Temperature/
-40°C to +150°C Junction Temperature
● Rugged
Applications
• Complies with CISPR22(EN55022) Class B
Conducted and Radiated Emissions
• Passes Drop, Shock, and Vibration Standards:
JESD22-B103, B104, B111
● Industrial Control Power Supplies
● General Purpose Point-of-Load
● Distributed Supply Regulation
● Base Station Power Supplies
● High Voltage Single-Board Systems
● Programmable Logic Controller
Ordering Information appears at end of data sheet.
uSLIC is a trademark of Maxim Integrated Products, Inc.
19-100596; Rev 1; 10/19
MAXM17630/MAXM17631/
MAXM17632
4.5V to 36V, 1A Himalaya uSLIC
Step-Down Power Module
Typical Application Circuit
C5
0.1μF
LX
BST
V
OUT
V
IN
OUT
FB
V
IN
5V/1A
7V TO 36V
C1
4.7μF
C4
22µF
EN/UVLO
RESET
MAXM17631
EXTVCC
MODE/SYNC
SS
V
CC
PGND
EP
RT
SGND
C2
C3
R1
15kΩ
5600pF
2.2μF
f
: 1250kHz
SW
C1: MURATA 4.7µF/X7R/50V/1206 (GRM31CR71H475KA12)
C4: MURATA 22µF/X7R/25V/1210 (GRM32ER71E226KE15)
C5
0.1μF
LX
BST
V
IN
OUT
FB
V
OUT
V
IN
4.5V TO 36V
3.3V/1A
C1
4.7μF
R4
3.32MΩ
R2
229kΩ
C4
22µF
EN/UVLO
RESET
R5
1.05MΩ
R3
88.7kΩ
MAXM17632
EXTVCC
MODE/SYNC
SS
V
CC
PGND
EP
RT
SGND
C2
C3
R1
21.5kΩ
5600pF
2.2μF
f
: 900kHz
SW
C1: MURATA 4.7µF/X7R/50V/1206 (GRM31CR71H475KA12)
C4: MURATA 22µF/X7R/25V/1210 (GRM32ER71E226KE15)
Maxim Integrated
│ 2
www.maximintegrated.com
MAXM17630/MAXM17631/
MAXM17632
4.5V to 36V, 1A Himalaya uSLIC
Step-Down Power Module
Absolute Maximum Ratings
IN
EN/UVLO to SGND....................................-0.3V to (V + 0.3V)
LX, OUT to PGND......................................-0.3V to (V + 0.3V)
EXTVCC to SGND ...............................................-5.5V to +6.5V
BST to PGND.....................................................-0.3V to +46.5V
BST to LX.............................................................-0.3V to +6.5V
V
to PGND .........................................................-0.3V to +40V
FB to SGND(MAXM17632)..................................-0.3V to +6.5V
PGND to SGND....................................................-0.3V to +0.3V
Output Short-Circuit Duration....................................Continuous
Operating Temperature Range (Note 1)........... -40°C to +125°C
Junction Temperature (Note 1)........................................+150°C
Storage Temperature Range............................ -55°C to +125°C
Lead Temperature (soldering,10s) ..................................+260°C
Soldering Temperature (reflow).......................................+260°C
IN
IN
BST to V
...........................................................-0.3V to +40V
CC
RESET, SS, MODE/SYNC, V , RT to SGND ...-0.3V to +6.5V
CC
FB to SGND(MAXM17630/MAXM17631) ............-5.5V to +6.5V
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these
or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect
device reliability.
Package Information
PACKAGE TYPE: 16-Pin uSLIC
Package Code
M1633+1
21-100298
90-100110
Outline Number
Land Pattern Number
THERMAL RESISTANCE, FOUR-LAYER BOARD (Note 2)
Junction to Ambient (θ 28°C/W
)
JA
For the latest package outline information and land patterns (footprints), go to www.maximintegrated.com/packages. Note that a “+”,
“#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing
pertains to the package regardless of RoHS status.
Note 1: Junction temperature greater than +125°C degrades operating lifetimes.
Note 2: Package thermal resistance is measured on an evaluation board with natural convection.
Electrical Characteristics
(V = V
= 24V, R
= open (f
= 400 kHz), C
= 2.2μF, V
= V
= V
= V
= 0V, V
=
IN
EN/UVLO
RT
SW
VCC
MODE/SYNC
EXTVCC
SGND
PGND
FB
3.67V (MAXM17630), V = 5.5V (MAXM17631), V = 1V (MAXM17632), LX = SS = RESET = OUT = OPEN, V
to V = 5V,
FB
FB
BST
LX
T
= -40°C to +125°C, unless otherwise noted. Typical values are at T = +25°C. All voltages are referenced to SGND, unless other-
A
A
wise noted.) (Note 3)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
INPUT SUPPLY (V
)
IN
Input Voltage Range
V
4.5
36
V
IN
Input Shutdown
Current
I
V
= 0V, shutdown mode
2.8
50
4.5
μA
IN-SH
EN/UVLO
MODE/SYNC = Open, V
R
= 5V,
EXTVCC
I
μA
Q-PFM
Q-DCM
= 15kΩ
RT
Input-Quiescent
Current
MODE/SYNC = V , V
R
= 5V,
= 5V,
CC EXTVCC
I
0.65
11
= 15kΩ
RT
mA
MODE/SYNC = GND, V
R
EXTVCC
I
Q-PWM
= 15kΩ, f
= 1250kHz
RT
SW
Maxim Integrated
│ 3
www.maximintegrated.com
MAXM17630/MAXM17631/
MAXM17632
4.5V to 36V, 1A Himalaya uSLIC
Step-Down Power Module
Electrical Characteristics (continued)
(V = V
= 24V, R
= open (f
= 400 kHz), C
= 2.2μF, V
= V
= V
= V
= 0V, V
=
IN
EN/UVLO
RT
SW
VCC
MODE/SYNC
EXTVCC
SGND
PGND
FB
3.67V (MAXM17630), V = 5.5V (MAXM17631), V = 1V (MAXM17632), LX = SS = RESET = OUT = OPEN, V
to V = 5V,
FB
FB
BST
LX
T
= -40°C to +125°C, unless otherwise noted. Typical values are at T = +25°C. All voltages are referenced to SGND, unless other-
A
A
wise noted.) (Note 3)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
ENABLE/UVLO (EN/UVLO)
V
V
V
rising
falling
1.19
1.215
1.09
1.26
ENR
EN/UVLO
EN/UVLO Threshold
V
V
1.068
1.131
ENF
EN/UVLO
EN/UVLO Input
Leakage Current
I
V
= 0V, T = +25°C
-50
+50
nA
EN
EN/UVLO
A
V
(LDO)
CC
V
Output-Voltage
CC
V
6V < V < 36V, 0mA ≤ I ≤ 10mA
VCC
4.75
25
5
5.25
V
CC
IN
Range
V
V
V
V
Current Limit
Dropout
UVLO
I
)
V
V
V
V
= 4.5V; V = 7.5V
50
mA
V
CC
CC
CC
CC
VCC(MAX
CC
IN
V
= 4.5V, I = 10mA
VCC
0.3
4.3
3.9
CC-DO
IN
V
rising
falling
4.05
3.65
4.2
3.8
V
CC-UVR
CC
CC
UVLO
V
V
CC-UVF
EXTVCC
V
V
rising
falling
4.56
4.3
4.7
4.84
4.6
EXTVCC Switchover
Threshold
EXTVCC
V
4.45
EXTVCC
SOFT-START (SS)
Charging Current
FEEDBACK (FB)
I
V
= 0.5V
4.7
5
5.3
μA
SS
SS
MODE/SYNC = SGND or MODE/SYNC = V
for MAXM17630
,
,
,
CC
CC
CC
3.26
4.94
3.3
5
3.34
5.06
MODE/SYNC = SGND or MODE/SYNC = V
for MAXM17631
FB Regulation
Voltage
MODE/SYNC = SGND or MODE/SYNC = V
for MAXM17632
V
V
FB-REG
0.889
0.9
0.911
MODE/SYNC = Open, for MAXM17630
MODE/SYNC = Open, for MAXM17631
MODE/SYNC = Open, for MAXM17632
For MAXM17630
3.26
4.94
0.89
3.36
5.09
0.915
11
3.43
5.20
0.936
μA
FB Input-Bias
Current
I
For MAXM17631
17
FB
0 ≤ V ≤ 1, T = 25°C, For MAXM17632
-50
+50
nA
FB
A
MODE/SYNC
V
0.65
-
CC
V
MODE/SYNC = V
(DCM Mode)
M-DCM
CC
MODE Threshold
V
V
MODE/SYNC = Open (PFM Mode)
MODE/SYNC = SGND (PWM mode)
V
/2
M-PFM
CC
V
0.75
M-PWM
SYNC Frequency-
Capture Range
1.1 ×
1.4 ×
f
SW
f
f
set by R
RT
kHz
SYNC
SW
f
SW
Maxim Integrated
│ 4
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MAXM17630/MAXM17631/
MAXM17632
4.5V to 36V, 1A Himalaya uSLIC
Step-Down Power Module
Electrical Characteristics (continued)
(V = V
= 24V, R
= open (f
= 400 kHz), C
= 2.2μF, V
= V
= V
= V
= 0V, V
=
IN
EN/UVLO
RT
SW
VCC
MODE/SYNC
EXTVCC
SGND
PGND
FB
3.67V (MAXM17630), V = 5.5V (MAXM17631), V = 1V (MAXM17632), LX = SS = RESET = OUT = OPEN, V
to V = 5V,
FB
FB
BST
LX
T
= -40°C to +125°C, unless otherwise noted. Typical values are at T = +25°C. All voltages are referenced to SGND, unless other-
A
A
wise noted.) (Note 3)
PARAMETER
SYMBOL
CONDITIONS
MIN
50
TYP
MAX
UNITS
SYNC Pulse Width
ns
V
2.1
IH
SYNC Threshold
V
V
0.8
IL
RT
R
R
R
R
= 50.8kΩ
= 40.2kΩ
= 8.06kΩ
= Open
380
475
400
500
420
525
2450
430
2.2
RT
RT
RT
RT
Switching Frequency
f
kHz
V
SW
1950
370
2200
400
For MAXM17630
For MAXM17631
For MAXM17632
2.05
3.11
0.56
2.13
3.22
0.58
32678
52
V
Undervoltage
FB
Trip Level to Cause
Hiccup
V
3.33
0.6
FB-HICF
Hiccup Timeout
Cycles
ns
Minimum On-Time
Minimum Off-Time
t
80
ON(MIN)
t
140
160
ns
OFF(MIN)
RESET
RESET Output
Level Low
V
I
400
mV
I
=10mA
RESETLKG
RESET
RESET Output-
Leakage Current
-100
93.8
90.5
+100
97.8
94.6
nA
%
T
= T = 25°C, V
J
= 5.5V
RESETLKG
A
RESET
FB Threshold for
RESET Deassertion
V
V
V
rising
falling
95
92
FB-OKR
FB
FB
FB Threshold for
RESET Assertion
V
%
FB-OKF
RESET Delay After
FB Reaches 95%
Regulation
1024
Cycles
THERMAL SHUTDOWN (TEMP)
Thermal-Shutdown
Threshold
Temperature rising
165
10
°C
°C
Thermal-Shutdown
Hysteresis
Note 3: Electrical specifications are production tested at T = +25°C. Specifications over the entire operating temperature range are
A
guaranteed by design and characterization.
Maxim Integrated
│ 5
www.maximintegrated.com
MAXM17630/MAXM17631/
MAXM17632
4.5V to 36V, 1A Himalaya uSLIC
Step-Down Power Module
Typical Operating Characteristics
(V
= V = 24V, V
= V
= 0V, C
= 2.2μF, C
= 0.1μF, C = 5600pF, T = -40°C to +125°C, unless otherwise
BST SS A
EN/UVLO
IN
SGND
PGND
VCC
noted. Typical values are at T = +25°C. All voltages are referenced to SGND, unless otherwise noted.)
A
MAXM17632
EFFICIENCY vs. LOAD CURRENT
VOUT = 1.5V, fSW = 480kHz, PWM MODE
MAXM17632
EFFICIENCY vs. LOAD CURRENT
VOUT = 0.9V, fSW = 400kHz, PWM MODE
MAXM17632
EFFICIENCY vs. LOAD CURRENT
OUT = 2.5V, fSW = 700kHz, PWM MODE
V
toc002
toc003
toc001
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VIN = 5V
VIN = 5V
VIN = 5V
VIN = 12V
VIN = 24V
VIN = 12V
VIN = 12V
VIN = 24V
VIN = 36V
VIN = 24V
VIN = 36V
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
LOAD CURRENT (A)
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
LOAD CURRENT (A)
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
LOAD CURRENT (A)
MAXM17631/MAXM17632
EFFICIENCY vs. LOAD CURRENT
VOUT = 5V, fSW = 1250kHz, PWM MODE
MAXM17630/MAXM17632
EFFICIENCY vs. LOAD CURRENT
VOUT = 3.3V, fSW = 900kHz, PWM MODE
MAXM17632
EFFICIENCY vs. LOAD CURRENT
VOUT = 12V, fSW = 2150kHz, PWM MODE
toc004
toc005
toc006
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VIN = 7V
VIN = 5V
VIN = 20V
VIN = 24V
VIN = 36V
VIN = 12V
VIN = 12V
VIN = 24V
VIN = 24V
VIN = 36V
VIN = 36V
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
LOAD CURRENT (A)
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
LOAD CURRENT (A)
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
LOAD CURRENT (A)
MAXM17632
EFFICIENCY vs. LOAD CURRENT
OUT = 0.9V, fSW = 400kHz, PFM MODE
MAXM17632
MAXM17632
V
EFFICIENCY vs
.
LOAD CURRENT
EFFICIENCY vs
. LOAD CURRENT
toc007
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0
VOUT = 1.5V, fSW = 480kHz
,
PFM MODE
VOUT = 2.5V, fSW = 700kHz, PFM MODE
toc008
toc009
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0
VIN = 24V
VIN = 12V
VIN = 5V
VIN = 12V
VIN = 5V
VIN = 36V
VIN = 36V
VIN = 12V
VIN = 24V
VIN = 5V
VIN = 24V
0.01
0.1
LOAD CURRENT (A)
1
0.01
0.1
LOAD CURRENT (A)
1
0.01
0.1
LOAD CURRENT (A)
1
Maxim Integrated
│ 6
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MAXM17630/MAXM17631/
MAXM17632
4.5V to 36V, 1A Himalaya uSLIC
Step-Down Power Module
Typical Operating Characteristics (continued)
(V
= V = 24V, V
= V
= 0V, C
= 2.2μF, C
= 0.1μF, C = 5600pF, T = -40°C to +125°C, unless otherwise
EN/UVLO
IN
SGND
PGND
VCC
BST SS A
noted. Typical values are at T = +25°C. All voltages are referenced to SGND, unless otherwise noted.)
A
MAXM17632
MAXM17630/MAXM17632
EFFICIENCY vs LOAD CURRENT
VOUT = 3.3V, fSW = 900kHz, PFM MODE
MAXM17631/MAXM17632
EFFICIENCY vs LOAD CURRENT
VOUT = 5V, fSW = 1250kHz, PFM MODE
EFFICIENCY vs
.
LOAD CURRENT
.
.
VOUT = 12V, fSW = 2150kHz, PFM MODE
toc010
toc012
toc011
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VIN = 36V
VIN = 20V
VIN = 36V
VIN = 12V
VIN = 36V
VIN = 24V
VIN = 12V
VIN = 7V
VIN = 24V
VIN = 24V
VIN = 5V
0.01
0.1
1
0.01
0.01
0.01
0.1
1
1
1
0.01
0.1
1
LOAD CURRENT (A)
LOAD CURRENT (A)
LOAD CURRENT (A)
MAXM17632
MAXM17632
MAXM17632
EFFICIENCY vs. LOAD CURRENT
EFFICIENCY vs
.
LOAD CURRENT
EFFICIENCY vs. LOAD CURRENT
VOUT = 2.5V, fSW = 700kHz, DCM MODE
toc015
VOUT = 1.5V, fSW = 480kHz, DCM MODE
VOUT = 0.9V, fSW = 400kHz, DCM MODE
toc013
toc014
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VIN = 5V
VIN = 5V
VIN = 5V
VIN = 36V
VIN = 36V
VIN = 24V
VIN = 24V
VIN = 24V
VIN = 12V
VIN = 12V
VIN = 12V
0.01
0.1
LOAD CURRENT (A)
1
0.1
LOAD CURRENT (A)
0.01
0.1
1
LOAD CURRENT (A)
MAXM17630/MAXM17632
EFFICIENCY vs LOAD CURRENT
VOUT = 3.3V, fSW = 900kHz, DCM MODE
MAXM17631/MAXM17632
EFFICIENCY vs LOAD CURRENT
VOUT = 5V, fSW = 1250kHz, DCM MODE
MAXM17632
.
.
EFFICIENCY vs. LOAD CURRENT
VOUT = 12V, fSW = 2150kHz, DCM MODE
toc018
toc017
toc016
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VIN = 5V
VIN = 7V
VIN = 20V
VIN = 36V
VIN = 24V
VIN = 36V
VIN = 36V
VIN = 12V
VIN = 24V
VIN = 12V
VIN = 24V
0.01
0.1
LOAD CURRENT (A)
1
0.1
LOAD CURRENT (A)
0.01
0.1
LOAD CURRENT (A)
1
Maxim Integrated
│ 7
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MAXM17630/MAXM17631/
MAXM17632
4.5V to 36V, 1A Himalaya uSLIC
Step-Down Power Module
Typical Operating Characteristics (continued)
(V
= V = 24V, V
= V
= 0V, C
= 2.2μF, C
= 0.1μF, C = 5600pF, T = -40°C to +125°C, unless otherwise
EN/UVLO
IN
SGND
PGND
VCC
BST SS A
noted. Typical values are at T = +25°C. All voltages are referenced to SGND, unless otherwise noted.)
A
MAXM17632
OUTPUT VOLTAGEvs. LOAD CURRENT
MAXM17632
OUTPUT VOLTAGEvs. LOAD CURRENT
MAXM17632
OUTPUT VOLTAGEvs. LOAD CURRENT
VOUT = 0.9V, fSW = 400kHz, PWM MODE
V
OUT = 1.5V, fSW = 480kHz, PWM MODE
VOUT = 2.5V, fSW = 700kHz, PWM MODE
toc021
toc020
toc019
1.495
1.494
1.493
1.492
1.491
1.490
2.510
2.508
2.506
2.504
2.502
2.500
0.907
0.904
0.901
0.898
0.895
0.892
0.889
VIN = 36V
VIN = 12V
VIN = 12V
VIN = 24V
VIN = 12V
VIN = 5V
VIN = 24V
VIN = 24V
VIN = 5V
VIN = 5V
VIN = 36V
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
LOAD CURRENT (A)
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
LOAD CURRENT (A)
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
LOAD CURRENT (A)
MAXM17630/MAXM17632
MAXM17631/MAXM17632
MAXM17632
OUTPUT VOLTAGEvs
.
LOAD CURRENT
OUTPUT VOLTAGEvs
.
LOAD CURRENT
OUTPUT VOLTAGEvs
. LOAD CURRENT
V
OUT = 3.3V, fSW = 900kHz, PWM MODE
VOUT = 5V, fSW = 1250kHz, PWM MODE
VOUT = 12V, fSW = 2150kHz, PWM MODE
toc023
toc024
toc022
12.12
12.10
12.08
12.06
12.04
12.02
12.00
5.10
5.09
5.08
5.07
5.06
5.05
5.04
5.03
3.320
3.312
3.304
3.296
3.288
3.280
VIN = 36V
VIN = 12V
VIN = 24V
VIN = 24V
VIN = 36V
VIN = 7V
VIN = 12V
VIN = 20V
VIN = 5V
VIN = 24V
VIN = 36V
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
LOAD CURRENT (A)
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
LOAD CURRENT (A)
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
LOAD CURRENT (A)
MAXM17632
OUTPUT VOLTAGEvs. LOAD CURRENT
MAXM17632
OUTPUT VOLTAGEvs. LOAD CURRENT
MAXM17632
OUTPUT VOLTAGEvs. LOAD CURRENT
VOUT = 0.9V, fSW = 400kHz, PFM MODE
VOUT = 1.5V, fSW = 480kHz, PFM MODE
VOUT = 2.5V, fSW = 700kHz, PFM MODE
toc025
toc026
toc027
0.93
0.92
0.91
0.90
0.89
1.53
1.52
1.51
1.50
1.49
1.48
2.57
2.56
2.55
2.54
2.53
2.52
2.51
2.50
2.49
VIN = 5V
VIN = 5V
VIN = 5V
VIN = 12V
VIN = 24V
VIN = 24V
VIN = 12V
VIN = 24V
VIN = 12V
VIN = 36V
VIN = 36V
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
LOAD CURRENT (A)
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
LOAD CURRENT (A)
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
LOAD CURRENT (A)
Maxim Integrated
│ 8
www.maximintegrated.com
MAXM17630/MAXM17631/
MAXM17632
4.5V to 36V, 1A Himalaya uSLIC
Step-Down Power Module
Typical Operating Characteristics (continued)
(V
= V = 24V, V
= V
= 0V, C
= 2.2μF, C
= 0.1μF, C = 5600pF, T = -40°C to +125°C, unless otherwise
EN/UVLO
IN
SGND
PGND
VCC
BST SS A
noted. Typical values are at T = +25°C. All voltages are referenced to SGND, unless otherwise noted.)
A
MAXM17631/MAXM17632
MAXM17632
MAXM17630/MAXM17632
OUTPUT VOLTAGEvs. LOAD CURRENT
OUTPUT VOLTAGEvs
VOUT = 5V, fSW = 1250kHz, PFM MODE
.
LOAD CURRENT
OUTPUT VOLTAGEvs
VOUT = 12V, fSW = 2150kHz, PFM MODE
.
LOAD CURRENT
VOUT = 3.3V, fSW = 900kHz, PFM MODE
toc028
toc029
toc030
3.40
3.38
3.36
3.34
3.32
3.30
3.28
5.20
5.18
5.16
5.14
5.12
5.10
5.08
5.06
5.04
5.02
5.00
12.27
12.24
12.21
12.18
12.15
12.12
12.09
12.06
12.03
VIN = 7V
VIN = 36V
VIN = 20V
VIN = 24V
VIN = 36V
VIN = 36V
VIN = 5V
VIN = 24V
VIN = 12V
VIN = 24V
VIN = 12V
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
LOAD CURRENT (A)
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
LOAD CURRENT (A)
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
LOAD CURRENT (A)
MAXM17632
OUTPUT VOLTAGEvs. LOAD CURRENT
MAXM17632
OUTPUT VOLTAGEvs. LOAD CURRENT
MAXM17632
OUTPUT VOLTAGEvs. LOAD CURRENT
VOUT = 0.9V, fSW = 400kHz, DCM MODE
VOUT = 1.5V, fSW = 480kHz, DCM MODE
VOUT = 2.5V, fSW = 700kHz, DCM MODE
toc031
toc032
toc033
0.912
0.907
0.902
0.897
0.892
0.887
0.882
1.495
1.494
1.493
1.492
1.491
1.490
2.520
2.515
2.510
2.505
2.500
2.495
2.490
VIN = 36V
VIN = 5V
VIN = 24V
VIN = 24V
VIN = 5V
VIN = 12V
VIN = 36V
VIN = 24V
VIN = 12V
VIN = 12V
VIN = 5V
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
LOAD CURRENT (A)
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
LOAD CURRENT (A)
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
LOAD CURRENT (A)
MAXM17630/MAXM17632
MAXM17631/MAXM17632
MAXM17632
OUTPUT VOLTAGEvs
.
LOAD CURRENT
OUTPUT VOLTAGEvs
. LOAD CURRENT
OUTPUT VOLTAGEvs
. LOAD CURRENT
VOUT = 3.3V, fSW = 900kHz, DCM MODE
VOUT = 5V, fSW = 1250kHz, DCM MODE
VOUT = 12V, fSW = 2150kHz, DCM MODE
toc034
toc035
toc036
5.09
5.08
5.07
5.06
5.05
5.04
12.12
12.10
12.08
12.06
12.04
12.02
12.00
3.320
3.312
3.304
3.296
3.288
3.280
VIN = 36V
VIN = 5V
VIN = 36V
VIN = 24V
VIN = 36V
VIN = 24V
VIN = 7V
VIN = 12V
VIN = 20V
VIN = 24V
VIN = 12V
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
LOAD CURRENT (A)
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
LOAD CURRENT (A)
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
LOAD CURRENT (A)
Maxim Integrated
│ 9
www.maximintegrated.com
MAXM17630/MAXM17631/
MAXM17632
4.5V to 36V, 1A Himalaya uSLIC
Step-Down Power Module
Typical Operating Characteristics (continued)
(V
= V = 24V, V
= V
= 0V, C
= 2.2μF, C
= 0.1μF, C = 5600pF, T = -40°C to +125°C, unless otherwise
EN/UVLO
IN
SGND
PGND
VCC
BST SS A
noted. Typical values are at T = +25°C. All voltages are referenced to SGND, unless otherwise noted.)
A
MAXM17630/MAXM17632
MAXM17632
MAXM17631/MAXM17632
STEADY-STATE OUTPUT-VOLTAGE RIPPLE
VOUT = 5V, fSW = 1250kHz, FULL LOAD, PWM MODE
STEADY-STATE OUTPUT-VOLTAGE RIPPLE
STEADY-STATE OUTPUT-VOLTAGE RIPPLE
VOUT = 3.3V, fSW = 900kHz, FULL LOAD, PWM MODE
VOUT = 2.5V, fSW = 700kHz, FULL LOAD, PWM MODE
toc039
toc038
toc037
10mV/div
10mV/div
VOUT(AC)
10mV/div
VOUT(AC)
VOUT(AC)
1µs/div
1µs/div
1µs/div
MAXM17632
STEADY-STATE OUTPUT-VOLTAGE RIPPLE
VOUT = 2.5V, fSW = 700kHz, 10mA LOAD, PFM MODE
MAXM17630/MAXM17632
STEADY-STATE OUTPUT-VOLTAGE RIPPLE
VOUT = 3.3V, fSW = 900kHz, 10mA LOAD, PFM MODE
MAXM17632
STEADY-STATE OUTPUT-VOLTAGE RIPPLE
VOUT = 12V, fSW = 2150kHz, FULL LOAD, PWM MODE
toc042
toc040
toc041
VOUT(AC)
20mV/div
VOUT(AC)
20mV/div
50mV/div
VOUT(AC)
400ns/div
40µs/div
40µs/div
MAXM17631/MAXM17632
STEADY-STATE OUTPUT-VOLTAGE RIPPLE
MAXM17632
STEADY-STATE OUTPUT-VOLTAGE RIPPLE
MAXM17632
STEADY-STATE OUTPUT-VOLTAGE RIPPLE
VOUT = 5V, fSW = 1250kHz, 10mA LOAD, PFM MODE
VOUT = 12V, fSW = 2150kHz, 10mA LOAD, PFM MODE
VOUT = 2.5V, fSW = 700kHz, 10mA LOAD, DCM MODE
toc043
toc044
toc045
VOUT(AC)
V0UT(AC)
50mV/div
100mV/div
10mV/div
VOUT(AC)
40µs/div
40µs/div
10µs/div
Maxim Integrated
│ 10
www.maximintegrated.com
MAXM17630/MAXM17631/
MAXM17632
4.5V to 36V, 1A Himalaya uSLIC
Step-Down Power Module
Typical Operating Characteristics (continued)
(V
= V = 24V, V
= V
= 0V, C
= 2.2μF, C
= 0.1μF, C = 5600pF, T = -40°C to +125°C, unless otherwise
EN/UVLO
IN
SGND
PGND
VCC
BST SS A
noted. Typical values are at T = +25°C. All voltages are referenced to SGND, unless otherwise noted.)
A
MAXM17630/MAXM17632
STEADY-STATE OUTPUT-VOLTAGE RIPPLE
MAXM17632
STEADY-STATE OUTPUT-VOLTAGE RIPPLE
MAXM17631/MAXM17632
STEADY-STATE OUTPUT-VOLTAGE RIPPLE
VOUT = 3.3V, fSW = 900kHz, 10mA LOAD, DCM MODE
VOUT = 12V, fSW = 2150kHz, 10mA LOAD, DCM MODE
VOUT = 5V, fSW = 1250kHz, 10mA LOAD, DCM MODE
toc046
toc047
toc048
VOUT(AC)
10mV/div
10mV/div
10mV/div
VOUT(AC)
VOUT(AC)
10µs/div
4µs/div
400ns/div
MAXM17632 LOAD-TRANSIENT RESPONSE
VOUT = 2.5V, fSW = 700kHz, PFM MODE
(LOAD CURRENT STEPPED FROM 10mA TO 0.5A)
toc051
MAXM17632 LOAD-TRANSIENT RESPONSE
VOUT = 2.5V, fSW = 700kHz, PWM MODE
MAXM17632 LOAD-TRANSIENT RESPONSE
VOUT = 2.5V, fSW = 700kHz, PWM MODE
(LOAD CURRENT STEPPED FROM 0A TO 0.5A)
(LOAD CURRENT STEPPED FROM 0.5A TO 1A)
toc049
toc050
VOUT(AC)
VOUT(AC)
50mV/div
50mV/div
VOUT(AC)
100mV/div
IOUT
500mA/div
IOUT
IOUT
500mA/div
500mA/div
200µs/div
200µs/div
400µs/div
MAXM17632 LOAD-TRANSIENT RESPONSE
VOUT = 2.5V, fSW = 700kHz, DCM MODE
MAXM17630/MAXM17632 LOAD-TRANSIENT RESPONSE
VOUT = 3.3V, fSW = 900kHz, PWM MODE
MAXM17630/MAXM17632 LOAD-TRANSIENT RESPONSE
VOUT = 3.3V, fSW = 900kHz, PWM MODE
(LOAD CURRENT STEPPED FROM 10mA TO 0.5A)
(LOAD CURRENT STEPPED FROM 0.5A TO 1A)
(LOAD CURRENT STEPPED FROM 0A TO 0.5A)
toc053
toc054
toc052
VOUT(AC)
100mV/div
VOUT(AC)
VOUT(AC)
100mV/div
100mV/div
IOUT
IOUT
500mA/div
500mA/div
IOUT
500mA/div
200µs/div
200µs/div
200µs/div
Maxim Integrated
│ 11
www.maximintegrated.com
MAXM17630/MAXM17631/
MAXM17632
4.5V to 36V, 1A Himalaya uSLIC
Step-Down Power Module
Typical Operating Characteristics (continued)
(V
= V = 24V, V
= V
= 0V, C
= 2.2μF, C
= 0.1μF, C = 5600pF, T = -40°C to +125°C, unless otherwise
EN/UVLO
IN
SGND
PGND
VCC
BST SS A
noted. Typical values are at T = +25°C. All voltages are referenced to SGND, unless otherwise noted.)
A
MAXM17630/MAXM17632 LOAD-TRANSIENT RESPONSE
VOUT = 3.3V, fSW = 900kHz, PFM MODE
MAXM17630/MAXM17632 LOAD-TRANSIENT RESPONSE
VOUT = 3.3V, fSW = 900kHz, DCM MODE
MAXM17631/MAXM17632 LOAD-TRANSIENT RESPONSE
VOUT = 5V, fSW = 1250kHz, PWM MODE
(LOAD CURRENT STEPPED FROM 10mA TO 0.5A)
(LOAD CURRENT STEPPED FROM 10mA TO 0.5A)
(LOAD CURRENT STEPPED FROM 0A TO 0.5A)
toc055
toc056
toc057
100mV/div
200mV/div
VOUT(AC)
VOUT(AC)
VOUT(AC)
100mV/div
500mA/div
IOUT
500mA/div
IOUT
IOUT
500mA/div
200µs/div
400µs/div
200µs/div
MAXM17631/MAXM17632 LOAD-TRANSIENT RESPONSE
VOUT = 5V, fSW = 1250kHz, DCM MODE
MAXM17631/MAXM17632 LOAD-TRANSIENT RESPONSE
VOUT = 5V, fSW = 1250kHz, PFM MODE
MAXM17631/MAXM17632 LOAD-TRANSIENT RESPONSE
VOUT = 5V, fSW = 1250kHz, PWM MODE
(LOAD CURRENT STEPPED FROM 10mA TO 0.5A)
(LOAD CURRENT STEPPED FROM 10mA TO 0.5A)
(LOAD CURRENT STEPPED FROM 0.5A TO 1A)
toc060
toc059
toc058
200mV/div
200mV/div
VOUT(AC)
VOUT(AC)
VOUT(AC)
100mV/div
500mA/div
IOUT
500mA/div
500mA/div
IOUT
IOUT
200µs/div
400µs/div
200µs/div
MAXM17632 LOAD-TRANSIENT RESPONSE
VOUT = 12V, fSW = 2150kHz, PWM MODE
MAXM17632 LOAD-TRANSIENT RESPONSE
VOUT = 12V, fSW = 2150kHz, PWM MODE
MAXM17632 LOAD-TRANSIENT RESPONSE
VOUT = 12V, fSW = 2150kHz, PFM MODE
(LOAD CURRENT STEPPED FROM 0A TO 0.5A)
(LOAD CURRENT STEPPED FROM 0.5A TO 1A)
(LOAD CURRENT STEPPED FROM 10mA TO 0.5A)
toc061
toc062
toc063
VOUT(AC)
200mV/div
VOUT(AC)
200mV/div
VOUT(AC)
500mV/div
IOUT
500mA/div
IOUT
IOUT
500mA/div
500mA/div
200µs/div
200µs/div
400µs/div
Maxim Integrated
│ 12
www.maximintegrated.com
MAXM17630/MAXM17631/
MAXM17632
4.5V to 36V, 1A Himalaya uSLIC
Step-Down Power Module
Typical Operating Characteristics (continued)
(V
= V = 24V, V
= V
= 0V, C
= 2.2μF, C
= 0.1μF, C = 5600pF, T = -40°C to +125°C, unless otherwise
EN/UVLO
IN
SGND
PGND
VCC
BST SS A
noted. Typical values are at T = +25°C. All voltages are referenced to SGND, unless otherwise noted.)
A
MAXM17632 LOAD-TRANSIENT RESPONSE
VOUT = 12V, fSW = 2150kHz, DCM MODE
(LOAD CURRENT STEPPED FROM 10mA TO 0.5A)
toc064
MAXM17632 STARTUP THROUGH ENABLE
MAXM17632 SHUTDOWN THROUGH ENABLE
VOUT = 2.5V, fSW = 700kHz, FULL LOAD, PWM MODE
VOUT = 2.5V, fSW = 700kHz, FULL LOAD, PWM MODE
toc065
toc066
5V/div
EN/UVLO
LX
EN/UVLO
5V/div
LX
20V/div
1V/div
VOUT(AC)
200mV/div
20V/div
VOUT
IOUT
RESET
500mA/div
VOUT
5V/div
1V/div
5V/div
RESET
200µs/div
1ms/div
100µs/div
MAXM17632 STARTUP THROUGH ENABLE
MAXM17632 SHUTDOWN THROUGH ENABLE
VOUT = 2.5V, fSW = 700kHz, 10mA LOAD, PFM MODE
MAXM17630/MAXM17632 STARTUP THROUGH ENABLE
VOUT = 2.5V, fSW = 700kHz, 10mA LOAD, PFM MODE
VOUT = 3.3V, fSW = 900kHz, FULL LOAD, PWM MODE
toc067
toc068
toc069
5V/div
5V/div
EN/UVLO
LX
EN/UVLO
5V/div
EN/UVLO
LX
20V/div
2V/div
20V/div
1V/div
20V/div
LX
VOUT
VOUT
RESET
VOUT
1V/div
5V/div
5V/div
5V/div
RESET
RESET
1ms/div
10ms/div
1ms/div
MAXM17630/MAXM17632 SHUTDOWN THROUGH ENABLE
MAXM17630/MAXM17632 STARTUP THROUGH ENABLE
MAXM17630/MAXM17632 SHUTDOWN THROUGH ENABLE
VOUT = 3.3V, fSW = 900kHz, FULL LOAD, PWM MODE
VOUT = 3.3V, fSW = 900kHz, 10mA LOAD, PFM MODE
VOUT = 3.3V, fSW = 900kHz, 10mA LOAD, PFM MODE
toc070
toc072
toc071
5V/div
EN/UVLO
LX
EN/UVLO
LX
5V/div
5V/div
20V/div
EN/UVLO
20V/div
2V/div
20V/div
LX
VOUT
VOUT
2V/div
5V/div
2V/div
RESET
VOUT
RESET
5V/div
5V/div
RESET
100µs/div
10ms/div
1ms/div
Maxim Integrated
│ 13
www.maximintegrated.com
MAXM17630/MAXM17631/
MAXM17632
4.5V to 36V, 1A Himalaya uSLIC
Step-Down Power Module
Typical Operating Characteristics (continued)
(V
= V = 24V, V
= V
= 0V, C
= 2.2μF, C
= 0.1μF, C = 5600pF, T = -40°C to +125°C, unless otherwise
EN/UVLO
IN
SGND
PGND
VCC
BST SS A
noted. Typical values are at T = +25°C. All voltages are referenced to SGND, unless otherwise noted.)
A
MAXM17631/MAXM17632 SHUTDOWN THROUGH ENABLE
MAXM17631/MAXM17632 STARTUP THROUGH ENABLE
MAXM17631/MAXM17632 STARTUP THROUGH ENABLE
VOUT = 5V,fSW = 1250kHz, FULL LOAD, PWM MODE
VOUT = 5V, fSW = 1250kHz, FULL LOAD, PWM MODE
VOUT = 5V, fSW = 1250kHz, 10mA LOAD, PFM MODE
toc074
toc073
toc075
5V/div
5V/div
5V/div
EN/UVLO
EN/UVLO
EN/UVLO
LX
20V/div
20V/div
2V/div
20V/div
2V/div
LX
LX
VOUT
RESET
2V/div
5V/div
VOUT
VOUT
5V/div
5V/div
RESET
RESET
100µs/div
1ms/div
1ms/div
MAXM17632 SHUTDOWN THROUGH VIN
MAXM17631/MAXM17632 SHUTDOWN THROUGH ENABLE
MAXM17632 STARTUP THROUGH VIN
VOUT = 2.5V, fSW = 700kHz, FULL LOAD, PWM MODE
VOUT = 5V, fSW = 1250kHz, 10mA LOAD, PFM MODE
VOUT = 2.5V, fSW = 700kHz, FULL LOAD, PWM MODE
toc078
toc076
toc077
VIN
20V/div
EN/UVLO
20V/div
5V/div
VIN
LX
LX
LX
20V/div
20V/div
20V/div
2V/div
1V/div
VOUT
VCC
VOUT
2V/div
VCC
RESET
2V/div
1V/div
5V/div
VOUT
10ms/div
1ms/div
2ms/div
MAXM17632 SHUTDOWN THROUGH VIN
MAXM17630/MAXM17632 STARTUP THROUGH VIN
MAXM17632 STARTUP THROUGH VIN
VOUT = 2.5V, fSW = 700kHz, 10mA LOAD, PFM MODE
VOUT = 3.3V, fSW = 900kHz, FULL LOAD, PWM MODE
VOUT = 2.5V, fSW = 700kHz, 10mA LOAD, PFM MODE
toc080
toc081
toc079
VIN
20V/div
20V/div
VIN
LX
20V/div
VIN
20V/div
2V/div
LX
20V/div
LX
20V/div
2V/div
1V/div
VCC
VOUT
2V/div
VCC
VCC
2V/div
1V/div
VOUT
VOUT
1ms/div
1ms/div
10ms/div
Maxim Integrated
│ 14
www.maximintegrated.com
MAXM17630/MAXM17631/
MAXM17632
4.5V to 36V, 1A Himalaya uSLIC
Step-Down Power Module
Typical Operating Characteristics (continued)
(V
= V = 24V, V
= V
= 0V, C
= 2.2μF, C
= 0.1μF, C = 5600pF, T = -40°C to +125°C, unless otherwise
EN/UVLO
IN
SGND
PGND
VCC
BST SS A
noted. Typical values are at T = +25°C. All voltages are referenced to SGND, unless otherwise noted.)
A
MAXM17630/MAXM17632 SHUTDOWN THROUGH VIN
VOUT = 3.3V, fSW = 900kHz,10mA LOAD, PFM MODE
MAXM17630/MAXM17632 SHUTDOWN THROUGH VIN
MAXM17630/MAXM17632 STARTUP THROUGH VIN
VOUT = 3.3V, fSW = 900kHz, FULL LOAD, PWM MODE
VOUT = 3.3V, fSW = 900kHz, 10mA LOAD, PFM MODE
toc083
toc082
toc084
VIN
VIN
20V/div
20V/div
VIN
20V/div
20V/div
LX
20V/div
2V/div
LX
20V/div
LX
VCC
VCC
VOUT
VOUT
2V/div
VCC
2V/div
2V/div
2V/div
2V/div
VOUT
1ms/div
2ms/div
10ms/div
MAXM17631/MAXM17632 STARTUP THROUGH VIN
MAXM17631/MAXM17632 STARTUP THROUGH VIN
MAXM17631/MAXM17632 SHUTDOWN THROUGH VIN
VOUT = 5V, fSW = 1250kHz, 10mA LOAD, PWM MODE
VOUT = 5V, fSW = 1250kHz, FULL LOAD, PWM MODE
VOUT = 5V, fSW = 1250kHz, FULL LOAD, PWM MODE
toc085
toc087
toc086
VIN
20V/div
20V/div
VIN
VIN
20V/div
LX
VCC
20V/div
20V/div
20V/div
LX
LX
2V/div
2V/div
2V/div
2V/div
VOUT
VCC
VCC
2V/div
2V/div
VOUT
VOUT
1ms/div
1ms/div
2ms/div
MAXM17631/MAXM17632
STARTUP THROUGH ENABLE (3.3V PREBIAS)
VOUT = 5V, fSW = 1250kHz, 10mA LOAD, PWM MODE
MAXM17630/MAXM17632
STARTUP THROUGH ENABLE (2.5V PREBIAS)
VOUT = 3.3V, fSW = 900kHz, 10mA LOAD, PWM MODE
MAXM17631/MAXM17632 SHUTDOWN THROUGH VIN
VOUT = 5V, fSW = 1250kHz, 10mA LOAD, PFM MODE
toc088
toc089
toc090
VIN
5V/div
5V/div
EN/UVLO
EN/UVLO
20V/div
20V/div
2V/div
LX
20V/div
LX
LX
20V/div
2V/div
VCC
VOUT
VOUT
VOUT
5V/div
5V/div
2V/div
2V/div
RESET
RESET
1ms/div
1ms/div
10ms/div
Maxim Integrated
│ 15
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MAXM17630/MAXM17631/
MAXM17632
4.5V to 36V, 1A Himalaya uSLIC
Step-Down Power Module
Typical Operating Characteristics (continued)
(V
= V = 24V, V
= V
= 0V, C
= 2.2μF, C
= 0.1μF, C = 5600pF, T = -40°C to +125°C, unless otherwise
EN/UVLO
IN
SGND
PGND
VCC
BST SS A
noted. Typical values are at T = +25°C. All voltages are referenced to SGND, unless otherwise noted.)
A
MAXM17632
STARTUP THROUGH ENABLE (5V PREBIAS)
MAXM17632
OUTPUT SHORT IN STEADY STATE
MAXM17632
OUTPUT SHORT DURING STARTUP
VOUT = 12V, fSW = 2150kHz, 10mA LOAD, PWM MODE
VOUT = 2.5V, fSW = 700kHz, FULL LOAD, PWM MODE
VOUT = 2.5V, fSW = 700kHz, FULL LOAD, PWM MODE
toc092
toc093
toc091
20V/div
5V/div
5V/div
VIN
SHORT
EN/UVLO
VOUT
20V/div
5V/div
LX
2V/div
VOUT
50mV/div
20V/div
LX
VOUT
LX
5V/div
20V/div
IOUT
1A/div
20mA/div
IOUT
RESET
20ms/div
1ms/div
20ms/div
MAXM17630/MAXM17632
OUTPUT SHORT IN STEADY STATE
MAXM17630/MAXM17632
OUTPUT SHORT DURING STARTUP
MAXM17631/MAXM17632
OUTPUT SHORT IN STEADY STATE
VOUT = 3.3V, fSW = 900kHz, FULL LOAD, PWM MODE
VOUT = 3.3V, fSW = 900kHz, FULL LOAD, PWM MODE
VOUT = 5V, fSW = 1250kHz, FULL LOAD, PWM MODE
toc094
toc095
toc096
20V/div
5V/div
5V/div
SHORT
VIN
SHORT
VOUT
VOUT
2V/div
VOUT
50mV/div
5V/div
LX
20V/div
20V/div
LX
LX
IOUT
20V/div
IOUT
1A/div
20mA/div
IOUT
1A/div
10ms/div
10ms/div
10ms/div
MAXM17631/MAXM17632
OUTPUT SHORT DURING STARTUP
VOUT = 5V, fSW = 1250kHz, FULL LOAD, PWM MODE
MAXM17631/MAXM17632 EXT CLOCK SYNC
VOUT = 5V, fSW = 1.25MHz, fSYNC = 1.75MHz,
MAXM17631/MAXM17632 EXT CLOCK SYNC
VOUT = 5V, fSW = 1.25MHz, fSYNC = 1.75MHz,
toc099
FULL LOAD, PWM MODE
toc098
FULL LOAD, PWM MODE
toc097
20V/div
VSYNC
VSYNC
5V/div
5V/div
VIN
VOUT
VOUT(AC)
50mV/div
50mV/div
LX
20V/div
IOUT
LX
20V/div
LX
20V/div
20mA/div
10ms/div
2µs/div
20µs/div
Maxim Integrated
│ 16
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MAXM17630/MAXM17631/
MAXM17632
4.5V to 36V, 1A Himalaya uSLIC
Step-Down Power Module
Typical Operating Characteristics (continued)
(V
= V = 24V, V
= V
= 0V, C
= 2.2μF, C
= 0.1μF, C = 5600pF, T = -40°C to +125°C, unless otherwise
EN/UVLO
IN
SGND
PGND
VCC
BST SS A
noted. Typical values are at T = +25°C. All voltages are referenced to SGND, unless otherwise noted.)
A
MAXM17631/MAXM17632 BODE PLOT
VOUT = 5V, fSW = 1250kHz, FULL LOAD, PWM MODE
MAXM17630/MAXM17632 BODE PLOT
MAXM17632 BODE PLOT
VOUT = 2.5V, fSW = 700kHz, FULL LOAD, PWM MODE
VOUT = 3.3V, fSW = 900kHz, FULL LOAD, PWM MODE
toc100
toc102
toc101
40
120
100
80
40
120
100
80
120
100
80
40
PHASE
PHASE
PHASE
30
30
30
20
20
20
10
60
10
60
60
10
0
40
0
40
40
0
GAIN
GAIN
-10
-20
-30
-40
20
-10
-20
-30
-40
20
20
-10
-20
-30
-40
GAIN
0
0
0
CROSSOVER FREQUENCY = 58.39kHz
PHASE MARGIN = 65.979°
CROSSOVER FREQUENCY = 67.974kHz
PHASE MARGIN = 72.884°
CROSSOVER FREQUENCY = 70.472kHz
PHASE MARGIN = 68.213°
-20
-40
-20
-40
-20
-40
1k
10k
100k
1k
10k
100k
1k
10k
100k
FREQUENCY (Hz)
FREQUENCY (Hz)
FREQUENCY (Hz)
MAXM17630/MAXM17631/MAXM17632
OUTPUT CURRENT vs. AMBIENT TEMPERATURE
MAXM17632 BODE PLOT
VOUT = 12V, fSW = 1250kHz, FULL LOAD, PWM MODE
toc104
toc103
1.25
40
120
100
80
PHASE
30
1
0.75
0.5
20
VOUT = 3.3V
10
60
0
40
VOUT = 5V
GAIN
-10
-20
-30
-40
20
VOUT = 12V
0
0.25
0
CROSSOVER FREQUENCY = 89.832kHz
PHASE MARGIN = 70.697°
-20
-40
1k
10k
100k
25 35 45 55 65 75 85 95 105 115 125
AMBIENT TEMPERATURE (°C)
MEASURED ON MAXM17630/MAXM17631/MAXM17632 EV KIT
FREQUENCY (Hz)
MAXM17630/MAXM17632 RADIATED EMISSIONS PLOT
MAXM17631/MAXM17632 RADIATED EMISSIONS PLOT
VOUT = 3.3V, fSW = 900kHz, FULL LOAD, PWM MODE
VOUT = 5V, fSW = 1250kHz, FULL LOAD, PWM MODE
toc107
toc108
70
70
60
50
60
50
CISPR-22 CLASS B QP LIMIT
40
CISPR-22 CLASS B QP LIMIT
40
30
30
VERTICAL SCAN
20
VERTICAL SCAN
20
10
0
10
0
HORIZONTAL SCAN
HORIZONTAL SCAN
-10
-10
100M
FREQUENCY (Hz)
MEASURED ON MAXM17630 EV KIT
30M
1G
100M
FREQUENCY (Hz)
MEASURED ON MAXM17631 EV KIT
30M
1G
Maxim Integrated
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MAXM17630/MAXM17631/
MAXM17632
4.5V to 36V, 1A Himalaya uSLIC
Step-Down Power Module
Pin Configuration
TOP VIEW
PGND
16
V
IN
15
LX
1
2
3
4
5
6
14
13
12
EN
PGND
(EP)
BST
V
CC
MAXM17630
MAXM17631
MAXM17632
EXTVCC
OUT
MODE/SYNC
RESET
SS
11
10
9
OUT
FB
RT
7
8
SGND
SGND
‘
‘ INDICATES PIN 1 OF THE MODULE
Pin Description
PIN
NAME
FUNCTION
1
LX
Switching node of the inductor. No external connection to this pin.
2
BST
Bootstrap Capacitor. Connect a 0.1μF ceramic capacitor between BST and LX.
External Power Supply Input Reduces the Internal-LDO loss. Connect it to output when OUT is
programmed to 5V only. When EXTVCC is not used, connect it to SGND.
3
EXTVCC
OUT
Module Output Pin. Connect a capacitor from OUT to GND. See the PCB Layout Guidelines section
for more details.
4, 5
Feedback Input. Connect the output voltage node (V
) to FB for MAXM17630 and MAXM17631.
OUT
6
7, 8
9
FB
SGND
RT
Connect FB to the center node of an external resistor-divider from the output to SGND to set the
output voltage for MAXM17632. See the Output Voltage Setting section for more details.
Analog Ground
Switching Frequency Settings. Connect a resistor from RT to SGND to set the regulator’s switching
frequency between 400kHz and 2.2MHz. Leave RT open for the default 400kHz frequency. See the
Setting the Switching Frequency (RT) section for more details.
10
SS
Soft-Start Input. Connect a capacitor from SS to SGND to set the soft-start time.
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MAXM17630/MAXM17631/
MAXM17632
4.5V to 36V, 1A Himalaya uSLIC
Step-Down Power Module
Pin Description (continued)
PIN
NAME
FUNCTION
Open-Drain Power Good Output. The RESET output is driven low if FB drops below 92% of its set
value. RESET goes high 1024 cycles after FB rises above 95% of its set value. See the Electrical
Characteristics table for threshold values
11
RESET
MODE/SYNC Pin Configures the Device to Operate either in PWM, PFM or DCM Modes of Opera-
tion. Leave MODE/SYNC open for PFM operation (pulse skipping at light loads). Connect MODE/
12
MODE/SYNC
SYNC to SGND for constant-frequency PWM operation at all loads. Connect MODE/SYNC to V
CC
for DCM operation at light loads. The device can be synchronized to an external clock using this pin.
13
14
V
CC
5V LDO Output. Bypass V with a 2.2μF ceramic capacitor to SGND.
CC
Enable/Undervoltage Lockout Pin. Drive EN/UVLO high to enable the output. Connect to the center
of the resistor-divider between V and SGND to set the input voltage at which the part turns on.
EN/UVLO
IN
Connect to the V pin for always on operation. Pull low for disabling the device.
IN
Power-Supply Input Pin. 4.5V to 36V input-supply range. Decouple to PGND with a capacitor; place
the capacitor close to the V and PGND pins.
IN
15
16
V
IN
Power Ground Pin of the module. Connect externally to the power ground plane. Refer to the
MAXM17630 Evaluation Kit (EV kit) data sheet for a layout example.
PGND
EP
Exposed Pad. Always connect EP to the PGND pin of the module. Also, connect EP to a large
PGND plane with several thermal vias for best thermal performance. Refer to the MAXM17630 EV
kit data sheet for an example of the correct method for EP connection and thermal vias.
-
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MAXM17630/MAXM17631/
MAXM17632
4.5V to 36V, 1A Himalaya uSLIC
Step-Down Power Module
Functional Diagrams
MAXM17630/MAXM17631/MAXM17632
EXTVCC
BST
V
V
IN
CC
LDO
SGND
HIGH-SIDE
DRIVER
LX
+
EN/UVLO
-
1.215V
SYNC
2.2µH
OUT
LOW-SIDE
DRIVER
PEAK
CURRENT-MODE
CONTROLLER
RT
OSCILLATOR
MODE
SELECTION
LOGIC
MODE/
SYNC
PGND
SYNC
SLOPE
COMPENSATION
ERROR AMPLIFIER/
LOOP COMPENSATION
SOFT-START
SS
FB
ENOK
RESET
*S1
RESET
LOGIC
*S3
*S2
R
T
R
B
* REFER TO TABLE A
TABLE A
S2
MODULE PART NUMBER
MAXM17630
S1
OPEN
OPEN
S3
R
(kΩ)
229
R (kΩ)
B
T
CLOSED
CLOSED
OPEN
CLOSED
CLOSED
OPEN
86
53
OPEN
MAXM17631
MAXM17632
241.6
OPEN
CLOSED
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MAXM17630/MAXM17631/
MAXM17632
4.5V to 36V, 1A Himalaya uSLIC
Step-Down Power Module
During external clock synchronization, the module oper-
ates in PWM mode irrespective of the mode of opera-
tion detected. When 16 external clock rising edges are
detected on the MODE/SYNC pin, the internal oscillator
Detailed Description
The MAXM17630/MAXM17631/MAXM17632 are a family
of high-efficiency, high voltage, synchronous step-down
DC-DC modules with integrated controller, MOSFETs,
compensation components, and inductor that operate
over a wide input-voltage range of 4.5V to 36V. The
modules can deliver up to 1A current. MAXM17630 and
MAXM17631 are fixed 3.3V and fixed 5V output parts,
respectively. MAXM17632 is the adjustable output voltage
(0.9V to 12V) part. Built-in compensation across the out-
put-voltage range eliminates the need for external com-
pensation components. The feedback-voltage regulation
accuracy over -40°C to +125°C is ±1.2% for MAXM17630/
MAXM17631/MAXM17632.
frequency set by the RT pin (f ) changes to the external
SW
clock frequency, and the device transitions to PWM mode.
The device remains in PWM mode until EN/UVLO or input
power is cycled. The external clock frequency must be
between 1.1 x f
and 1.4 x f . The minimum exter-
SW
SW
nal clock pulse width should be greater than 50ns. The
off-time duration of the external clock should be at least
160ns. See the MODE/SYNC section in the Electrical
Characteristics table for details.
PWM Operation
The modules feature a peak-current-mode control archi-
tecture. An internal transconductance error amplifier
produces an integrated error voltage at an internal node,
which sets the duty cycle using a PWM comparator, a
high-side current-sense amplifier, and a slope-compen-
sation generator. At each rising edge of the clock, the
high-side MOSFET turns on and remains on until either
the appropriate or maximum duty cycle is reached, or
the peak current limit is detected. During the high-side
MOSFET on-time, the inductor current ramps up. During
the second half of the switching cycle, the high-side
MOSFET turns off and the low-side MOSFET turns on.
The inductor releases the stored energy as its current
ramps down and provides current to the output.
In PWM mode, the internal inductor current is allowed to
go negative. PWM operation is useful in frequency sensi-
tive applications and provides fixed switching frequency
operation at all loads. However, PWM mode gives lower
efficiency at light loads compared to PFM and DCM
modes of operation.
PFM Operation
PFM mode disables negative output current in the induc-
tor, and additionally skips pulses at light loads for better
efficiency. In PFM mode, the inductor current is forced to
a fixed peak of 700mA in every clock cycle until the output
voltage rises to 102.3% of the nominal value. Once the
output voltage reaches 102.3% of the nominal value, the
high-side switch is turned OFF and the low-side switch is
turned ON. Once the inductor current hits zero cross, LX
goes to a high impedance state and the module enters
hibernate operation until the load current discharges the
output voltage to 101.1% of the nominal value. Most of
the internal blocks are turned OFF in hibernate operation
to save quiescent current. When the output voltage falls
below 101.1% of the nominal value, the module comes
out of hibernate operation, turns on all internal blocks, and
commences the process of delivering pulses of energy
until the output voltage reaches 102.3% of the nominal
value. The module naturally comes out of PFM mode
and serves load requirements when the module output
demands more than 700mA peak. The advantage of PFM
mode is higher efficiency at light loads because of lower
quiescent current drawn from supply. The disadvantage is
that the output-voltage ripple is higher compared to PWM
or DCM modes of operation and switching frequency is
not constant at light loads.
The module features a MODE/SYNC pin that can be used
to operate the device in PWM, or PFM, or DCM control
modes. The module integrates adjustable-input undervolt-
age lockout, adjustable soft-start, open-drain RESET, and
external frequency synchronization features.
Mode Selection and External
Synchronization (MODE/SYNC)
The MAXM17630/MAXM17631/MAXM17632 support
PWM, PFM, and DCM mode of operation. The device
enters the required mode of operation based on the set-
ting of the MODE/SYNC pin as detected within 1.5ms
after V
and EN/UVLO voltages exceed their respec-
CC
tive UVLO rising thresholds (V
, and V
). If the
CC-UVR
ENR
MODE/SYNC pin is open, the module operates in PFM
mode at light loads. If the state of the MODE/SYNC pin
is low (< V ), the module operates in constant-fre-
M-PWM
quency PWM mode at all loads. If the state of the MODE/
SYNC pin is high (> V ), the module operates in
M-DCM
DCM mode at light loads.
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MAXM17630/MAXM17631/
MAXM17632
4.5V to 36V, 1A Himalaya uSLIC
Step-Down Power Module
DCM Operation
Table 1. Switching Frequency
vs. RT Resistor
DCM mode of operation features constant frequency
operation down to lighter loads than PFM mode by
disabling negative inductor current at light loads. DCM
operation offers efficiency performance that lies between
PWM and PFM modes. The output-voltage ripple in DCM
mode is comparable to PWM mode and relatively lower
compared to PFM mode.
SWITCHING FREQUENCY
RT RESISTOR
(kHz)
(kΩ)
400
400
OPEN
50.8
500
40.2
2200
8.06
Linear Regulator (V
and EXTVCC)
CC
The module has an internal low dropout (LDO) regulator
that powers V from V . This LDO is enabled during
RESET Output (RESET)
CC
IN
The module includes an open-drain RESET output to
monitor the output voltage. The open-drain RESET output
requires an external pullup resistor. RESET goes high
(high impedance) 1024 switching cycles after the regula-
tor output increases above 95% of the designed nominal
regulated voltage. RESET goes low when the regulator
output voltage drops below 92% of the nominal regulated
voltage. RESET also goes low during thermal shutdown or
power-up or when EN/UVLO is recycled. When V
is
CC
above its UVLO, if EXTVCC is greater than 4.7V (typ),
internal V is powered by EXTVCC and LDO is dis-
CC
abled from V . Powering V
from EXTVCC increases
IN
CC
efficiency at higher input voltages. The typical V
voltage is 5V. Bypass V
ESR ceramic capacitor. V
and the low-side MOSFET driver and recharges the exter-
nal bootstrap capacitor.
output
CC
to SGND with a 2.2μF low-
CC
powers the internal blocks
CC
when the EN/UVLO pin goes below V
.
ENF
The module employs an undervoltage-lockout circuit that
Prebiased Output
forces the regulator off when V
falls below V
.
CC
CC_UVF
When the module starts into a prebiased output, both the
high-side and the low-side switches are turned off so that
the module does not sink current from the output. High-
side and low-side switches do not start switching until
the PWM comparator commands the first PWM pulse, at
which point switching commences. The output voltage is
then smoothly ramped up to the target value in alignment
with the internal reference.
The regulator can be immediately enabled again when
> V . The 400mV UVLO hysteresis prevents
chattering on power-up/power-down.
V
CC
CC_UVR
In applications where the buck-converter output is con-
nected to the EXTVCC pin, if the output is shorted to
ground, then the transfer from EXTVCC to internal LDO
happens seamlessly without any impact to the normal
functionality. Connect the EXTVCC pin to SGND when
not in use.
Overcurrent Protection (OCP)/Hiccup Mode
The MAXM17630/MAXM17631/MAXM17632 are pro-
vided with a robust overcurrent protection (OCP) scheme
that protects the modules under overload and output
short-circuit conditions. The power module measures
and limits peak inductor current. When overcurrent is
detected in the inductor, or if the feedback voltage drops
Setting the Switching Frequency (RT)
The switching frequency of the module can be pro-
grammed from 400kHz to 2.2MHz by using a resistor con-
nected from the RT pin to SGND. The switching frequency
(f ) is related to the resistor connected at the RT pin
SW
to V
any time after soft-start is complete, the
(R ) by the following equation:
RT
FB-HICF
module enters hiccup mode of operation. In hiccup mode,
the converter is protected by suspending switching for a
hiccup timeout period of 32,768 clock cycles of half the
programmed switching frequency. Once the hiccup time-
out period expires, soft-start is attempted again. Note that
when soft-start is attempted under overload condition, if
21000
R
=
− 1.7
RT
f
SW
Where R is in kΩ and f
is in kHz. Leaving the RT pin
RT
SW
open makes the module operate at the default switching
frequency of 400kHz. See Table 1 for RT resistor values
for a few common switching frequencies.
feedback voltage does not exceed V
, the device
FB-HICF
continues to switch at half the programmed switching fre-
quency for the time duration of the programmed soft-start
time and 1024 clock cycles. Hiccup mode of operation
ensures low power dissipation under output overload or
short-circuit conditions.
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MAXM17630/MAXM17631/
MAXM17632
4.5V to 36V, 1A Himalaya uSLIC
Step-Down Power Module
The MAXM17630/MAXM17631/MAXM17632 are designed
to support a maximum load current of 1A. The inductor
ripple current is calculated as follows:
Also, for duty cycle > 0.5
ꢀ
4
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
where f
Switching frequency in Hz
ꢀ
ꢀ
SW =
Selection of Input Capacitor
where:
The input filter capacitor reduces peak currents drawn
from the power source and reduces noise and voltage
ripple on the input caused by the converter switching.
V
V
f
= Steady-state output voltage
OUT
= Operating input voltage for given V
= Switching Frequency in Hz
IN
OUT
The input capacitor RMS current requirement (I
defined by the following equation:
) is
RMS
SW
L = Power module output inductance (2.2μH ±30%) in μH
= Required output (load) current
I
OUT
ꢀ
ꢀ
The following condition should be satisfied at the desired
load current, I
.
OUT
where I
is the maximum load current. I
has
RMS
OUT(MAX)
2.32
a maximum value when the input voltage equals twice the
output voltage (V = 2 x V
).
IN
OUT
Thermal Overload Protection
I
OUT(MAX)
Thermal overload protection limits the total power dis-
sipation in the device. When the junction temperature
exceeds +165°C, an on-chip thermal sensor shuts down
the device, turns off the internal power MOSFETs, allow-
ing the device to cool down. The thermal sensor turns the
device on after the junction temperature cools by 10°C.
Soft-start resets during thermal shutdown.
So,
I
=
RMS(MAX)
2
Choose an input capacitor that exhibits less than +10°C
temperature rise at the RMS input current for optimal
long-term reliability. Use low-ESR ceramic capacitors with
high-ripple-current capability at the input. X7R capacitors
are recommended in industrial applications for their tem-
perature stability. Calculate the input capacitance using
the following equation:
Applications Information
Input-Voltage Range
The minimum and maximum operating input voltages for
a given output voltage is calculated as follows:
ꢀ
ꢀ
I
ꢀ
ꢀ
where
ꢀ
ꢀ
D
= Maximum duty cycle
MAX
f
= Switching frequency
SW
∆V = Allowable input voltage ripple
IN
ꢀ
In applications where the source is located distant from
the device input, an appropriate electrolytic capacitor
should be added in parallel to the ceramic capacitor
to provide necessary damping for potential oscillations
caused by the inductance of the longer input power path
and input ceramic capacitor.
where:
V
= Steady-state output voltage
= Maximum load current
OUT
I
f
t
OUT
Maximum switching frequency in Hz
SW(MAX) =
= Worst Case minimum switch off-time
OFF-MIN(MAX)
(160ns)
t
= Worst case minimum switch on-time
ON-MIN(MAX)
(80ns).
Maxim Integrated
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MAXM17630/MAXM17631/
MAXM17632
4.5V to 36V, 1A Himalaya uSLIC
Step-Down Power Module
The soft-start time (t ) is related to the capacitor con-
SS
Selection of Output Capacitor
nected at SS (C ) by the following equation:
SS
X7R ceramic output capacitors are preferred due to their
stability over temperature in industrial applications. The
output capacitor has two functions. It provides smooth
voltage and, stores sufficient energy to support the output
voltage under load transient conditions and stabilizes the
device’s internal control loop. Usually the output capacitor
is sized to support a step load of 50% of the maximum
output current in the application, such that the output-
voltage deviation is less than 3%. The minimum required
output capacitance can be calculated as follows:
C
ꢀ
For example, to program a 1ms soft-start time, a 5.6nF
capacitor should be connected from the SS pin to SGND.
Note that during startup, the device operates at half the
programmed switching frequency until the output voltage
reaches 64.4% of output nominal voltage.
Setting the Input Undervoltage-Lockout Level
The devices offer an adjustable input undervoltage lock-
out level. Set the voltage at which the device turns on with
ꢀ
ꢀ
a resistive voltage-divider connected from V to SGND
(see Figure 1). Connect the center node of the divider to
EN/UVLO.
IN
0.33
1
t
+
f
RESPONSE
f
C
SW
Choose R4 to be 3.3MΩ (max) and then calculate R5 as
follows:
where:
I
= Load current step
STEP
ꢀ
ꢁ4
t
= Response time of the controller
RESPONSE
ꢁ5
∆V
= Allowable output-voltage deviation
OUT
f
f
= Target closed-loop crossover frequency
C
where V
to turn on. Ensure that V
is the voltage at which the device is required
INU
= Switching frequency.
SW
is higher than 0.8 x V
.
INU
OUT
Select f to be 1/10th of f
less than or equal to 800kHz. If the switching frequency is
more than 800kHz, select f to be 80kHz. Actual derating
of ceramic capacitors with DC-voltage must be consid-
ered while selecting the output capacitor. Derating curves
are available from all major ceramic capacitor vendors.
if the switching frequency is
SW
C
If the EN/UVLO pin is driven from an external signal
source, a series resistance of minimum 1kΩ is recom-
mended to be placed between the signal source output
and the EN/UVLO pin to reduce voltage ringing on the
line.
C
Selection of Soft-Start Capacitor
MAXM17630
MAXM17631
MAXM17632
The device implements adjustable soft-start operation to
reduce inrush current. A capacitor connected from the SS
pin to SGND programs the soft-start time. The selected
V
IN
R4
R5
output capacitance (C
) and the output voltage (V
)
EN/UVLO
SEL
OUT
determine the minimum required soft-start capacitor as
follows:
ꢀ
ꢀ
ꢀ
Figure 1. Adjustable EN/UVLO Network
Maxim Integrated
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MAXM17630/MAXM17631/
MAXM17632
4.5V to 36V, 1A Himalaya uSLIC
Step-Down Power Module
Output Voltage Setting
Set the output voltage with a resistive voltage-divider con-
nected from the output-voltage node OUT to SGND (see
Figure 2). Connect the center node of the divider to the
FB pin for MAXM17632. Connect the output voltage node
(OUT) to the FB pin for MAXM17630 and MAXM17631
(see Figure 3). Use the following procedure to choose the
resistive voltage-divider values.
OUT
R2
MAXM17632
FB
R3
Calculate resistor R2 from the output to the FB pin as
follows:
Figure 2. Setting Adjustable Output Voltage
255
ꢀ
ꢉ2
ꢁꢂ
C
ꢇ
ꢈ
ꢃ
ꢄꢅꢆ
where:
R2 is in kΩ
OUT
f
C
= Crossover frequency is in Hz
MAXM17630
MAXM17631
C
= Actual capacitance of selected output capacitor at
OUT
DC-bias voltage in F.
FB
Calculate resistor R3 from FB pin to SGND as follows:
ꢀ
ꢁ2
ꢁ3
Figure 3. Setting Fixed Output Voltage
where, R3 is in kΩ and V
equals the target output
OUT
voltage.
Table 2. Components selection for MAXM17630/MAXM17631/MAXM17632
PART
NUMBER
V
)
V
V
(V)
RT
(kΩ)
R2
(kΩ)
R3
(kΩ)
f
SW
(kHz)
IN(MIN
(V)
IN(MAX)
(V)
OUT
C
C
OUT
IN
1 x 4.7µF 1206 50V
(Murata GRM-
31CR71H475KA12#)
1 x 22µF 1210 25V
(Murata GRM32ER-
71E226KE15#)
MAXM17630
MAXM17631
4.5
7
36
36
3.3
21.5
N/A
N/A
N/A
N/A
900
1 x 4.7µF 1206 50V
(Murata GRM-
31CR71H475KA12#)
1 x 22µF 1210 25V
(Murata GRM32ER-
71E226KE15#)
5
15.00
1250
Maxim Integrated
│ 25
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MAXM17630/MAXM17631/
MAXM17632
4.5V to 36V, 1A Himalaya uSLIC
Step-Down Power Module
Table 2. Components selection for MAXM17630/MAXM17631/MAXM17632 (continued)
PART
NUMBER
V
)
V
V
(V)
RT
(kΩ)
R2
(kΩ)
R3
(kΩ)
f
SW
(kHz)
IN(MIN
(V)
IN(MAX)
(V)
OUT
C
C
OUT
IN
1 x 4.7µF 1206 50V
(Murata GRM-
31CR71H475KA12#)
3 x 47µF 1210 10V
(Murata GRM32ER-
71A476KE15#)
4.5
4.5
4.5
4.5
4.5
4.5
7
26.5
35.5
36
0.9
OPEN 69.8 OPEN
400
1 x 4.7µF 1206 50V
(Murata GRM-
31CR71H475KA12#)
3 x 47µF 1210 10V
(Murata GRM32ER-
71A476KE15#)
1.2
1.5
1.8
2.5
3.3
5
OPEN 69.8
210
137
90.9
76.8
88.7
56
400
480
1 x 4.7µF 1206 50V
(Murata GRM-
31CR71H475KA12#)
2 x 47µF 1210 10V
(Murata GRM32ER-
71A476KE15#)
42.20
40.2
90.9
90.9
137
229
261
634
1 x 4.7µF 1206 50V
(Murata GRM-
31CR71H475KA12#)
2 x 47µF 1210 10V
(Murata GRM32ER-
71A476KE15#)
36
500
MAXM17632
1 x 4.7µF 1206 50V
(Murata GRM-
31CR71H475KA12#)
1 x 47µF 1210 10V
(Murata GRM32ER-
71A476KE15#)
36
28.40
21.5
700
1 x 4.7µF 1206 50V
(Murata GRM-
31CR71H475KA12#)
1 x 22µF 1210 25V
(Murata GRM32ER-
71E226KE15#)
36
900
1 x 4.7µF 1206 50V
(Murata GRM-
31CR71H475KA12#)
1 x 22µF 1210 25V
(Murata GRM32ER-
71E226KE15#)
36
15.00
8.20
1250
2150
1 x 4.7µF 1206 50V
(Murata GRM-
31CR71H475KA12#)
1 x 10µF 1210 50V
(Murata GRM32ER-
71H106KA12#)
20
36
12
51
The MAXM17630/MAXM17631/MAXM17632 has a pulse skip algorithm that allows V
to be regulated when the
OUT
operating input voltage is beyond the V
specified in the above table up to 36V.
IN(MAX)
the power-conversion efficiency, or measure the efficiency
to determine the total power dissipation. An EE-SIM
model is available for the MAXM17630/MAXM17631/
MAXM17632 to simulate efficiency and power loss for the
desired operating conditions.
Power dissipation
The power dissipation inside the module leads to an
increase in the junction temperature of the MAXM17630/
MAXM17631/MAXM17632. The power loss inside the
module at full load can be estimated as follows:
PCB Layout Guidelines
Use the following guidelines for good PCB layout:
ꢀ
P
P
Where η is the efficiency of the power module at the desired
● Keep the input capacitors as close as possible to the
operating conditions. The junction temperature (T ) of the
J
IN and GND pins.
module can be estimated at any given maximum ambient
● Keep the output capacitors as close as possible to
temperature (T ) from the following equation:
A
the OUT and GND pins.
ꢀ
P
● Keep the resistive feedback dividers as close as
possible to the FB pin.
For the MAXM17630/MAXM17631/MAXM17632 evalua-
tion board, the thermal resistance from junction-to-ambi-
● Keep the power traces and load connections short.
Refer to the MAXM17630/MAXM17631/MAXM17632 EV
kit layout for first pass success.
ent (θ ) is 28°C/W. Operating the module at junction
temperatures greater than +125°C degrades operating
JA
lifetimes. See the Typical Operating Characteristics for
Maxim Integrated
│ 26
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MAXM17630/MAXM17631/
MAXM17632
4.5V to 36V, 1A Himalaya uSLIC
Step-Down Power Module
C5
LX
BST
V
IN
OUT
V
IN
V
OUT
C1
R4
R5
C4
R2
R3
EN/UVLO
RESET
FB
MAXM17632
EXTVCC
MODE/SYNC
SS
V
CC
PGND
EP
RT
SGND
C2
C3
R1
C1
IN PLANE
PGND PLANE
R4
R5
C2
PGND
EN/
UVLO
V
IN
LX
BST
C5
EP
V
CC
MODE/
SYNC
EXTVCC
MAXM17632
C4
RESET
OUT
OUT
C3
OUT PLANE
SS
R1
RT
FB
SGND
SGND
SGND PLANE
R2
R3
VIA FOR ROUTING EXTVCC TO SGND PLANE
Figure 4. Adjustable Output Layout Guidelines
Maxim Integrated
│ 27
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MAXM17630/MAXM17631/
MAXM17632
4.5V to 36V, 1A Himalaya uSLIC
Step-Down Power Module
C5
LX
BST
V
IN
OUT
V
IN
V
OUT
C1
R2
R3
C4
EN/UVLO
RESET
FB
MAXM17630
MAXM17631
EXTVCC
MODE/SYNC
SS
V
CC
PGND
EP
RT
SGND
C2
C3
R1
C1
IN PLANE
PGND PLANE
R2
R3
C2
PGND
EN/
UVLO
V
IN
LX
C5
EP
BST
V
CC
MODE/
SYNC
EXTVCC
MAXM17630
MAXM17631
C4
RESET
OUT
OUT
C3
OUT PLANE
SS
R1
RT
FB
SGND
SGND
SGND PLANE
VIA FOR ROUTING EXTVCC TO SGND PLANE
Figure 5. Fixed Output Layout Guidelines
Maxim Integrated
│ 28
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MAXM17630/MAXM17631/
MAXM17632
4.5V to 36V, 1A Himalaya uSLIC
Step-Down Power Module
Typical Application Circuits
Typical Application Circuit for Fixed 3.3V Output
C5
0.1μF
LX
BST
V
OUT
V
IN
OUT
FB
V
IN
3.3V/1A
C4
22µF
4.5V TO 36V
C1
4.7μF
EN/UVLO
RESET
MAXM17630
EXTVCC
C1: MURATA 4.7µF/X7R/50V/1206 (GRM31CR71H475KA12)
C2: TDK 2.2µF/X7R/6.3V/0603 (CGA3E1X7R0J225K080AC)
C3: MURATA 5600pF/X7R/25V/0402 (GRM155R71E562KA01)
C4: MURATA 22µF/X7R/25V/1210 (GRM32ER71E226KE15)
C5: TDK 0.1µF/X7R/16V/0402 (CGA2B1X7R1C104K050BC)
MODE/SYNC
SS
V
CC
PGND
EP
RT
SGND
f : 900kHz
SW
MODE/SYNC = SGND for PWM mode
C2
C3
R1
21.5kΩ
MODE/SYNC = V for DCM mode
CC
MODE/SYNC = OPEN for PFM mode
5600pF
2.2μF
Typical Application Circuit for Fixed 5V output
C5
0.1μF
LX
BST
V
OUT
V
IN
OUT
FB
V
IN
5V/1A
7V TO 36V
C1
4.7μF
C4
22µF
EN/UVLO
RESET
MAXM17631
EXTVCC
C1: MURATA 4.7µF/X7R/50V/1206 (GRM31CR71H475KA12)
C2: TDK 2.2µF/X7R/6.3V/0603 (CGA3E1X7R0J225K080AC)
C3: MURATA 5600pF/X7R/25V/0402 (GRM155R71E562KA01)
C4: MURATA 22µF/X7R/25V/1210 (GRM32ER71E226KE15)
C5: TDK 0.1µF/X7R/16V/0402 (CGA2B1X7R1C104K050BC)
MODE/SYNC
SS
V
CC
PGND
EP
RT
SGND
f
: 1250kHz
SW
MODE/SYNC = SGND FOR PWM MODE
C2
C3
R1
15kΩ
MODE/SYNC = V FOR DCM MODE
CC
MODE/SYNC = OPEN FOR PFM MODE
5600pF
2.2μF
Maxim Integrated
│ 29
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MAXM17630/MAXM17631/
MAXM17632
4.5V to 36V, 1A Himalaya uSLIC
Step-Down Power Module
Typical Application Circuits (continued)
Typical Application Circuit for Adjustable 2.5V OUTPUT
C5
0.1μF
LX
BST
OUT
V
OUT
V
IN
V
IN
4.5V TO 36V
2.5V/1A
R2
137kΩ
C1
4.7μF
C4
47µF
FB
EN/UVLO
RESET
R3
76.8kΩ
MAXM17632
EXTVCC
C1: MURATA 4.7µF/X7R/50V/1206 (GRM31CR71H475KA12)
MODE/SYNC
C2: TDK 2.2µF/X7R/6.3V/0603 (CGA3E1X7R0J225K080AC)
C3: MURATA 5600pF/X7R/25V/0402 (GRM155R71E562KA01)
C4: MURATA 47µF/X7R/10V/1210 (GRM32ER71A476KE15)
C5: TDK 0.1µF/X7R/16V/0402 (CGA2B1X7R1C104K050BC)
SS
V
CC
PGND
EP
RT
SGND
R1
f
: 700kHz
SW
MODE/SYNC = SGND for PWM mode
C2
C3
MODE/SYNC = V for DCM mode
CC
MODE/SYNC = OPEN for PFM mode
5600pF
2.2μF
28.4kΩ
Typical Application Circuit for Adjustable 12V Output
C5
0.1μF
LX
BST
OUT
V
OUT
V
IN
V
IN
12V/1A
20V TO 36V
C1
R2
C4
634kΩ
4.7μF
10µF
FB
EN/UVLO
RESET
R3
51kΩ
MAXM17632
EXTVCC
C1: MURATA 4.7µF/X7R/50V/1206 (GRM31CR71H475KA12)
C2: TDK 2.2µF/X7R/6.3V/0603 (CGA3E1X7R0J225K080AC)
C3: MURATA 5600pF/X7R/25V/0402 (GRM155R71E562KA01)
C4: MURATA 10µF/X7R/25V/1210 (GRM32ER71H106KA12)
C5: TDK 0.1µF/X7R/16V/0402 (CGA2B1X7R1C104K050BC)
MODE/SYNC
SS
V
CC
f
: 2150kHz
SW
PGND
EP
RT
SGND
R1
MODE/SYNC = SGND for PWM mode
C2
C3
5600pF
MODE/SYNC = V for DCM mode
CC
MODE/SYNC = OPEN for PFM mode
2.2μF
8.2kΩ
Maxim Integrated
│ 30
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MAXM17630/MAXM17631/
MAXM17632
4.5V to 36V, 1A Himalaya uSLIC
Step-Down Power Module
Ordering Information
PART NUMBER
MAXM17630AME+
MAXM17630AME+T
MAXM17631AME+
MAXM17631AME+T
MAXM17632AME+
MAXM17632AME+T
TEMP RANGE
OUTPUT VOLTAGE (V)
PIN-PACKAGE
16-pin uSLIC
16-pin uSLIC
16-pin uSLIC
16-pin uSLIC
16-pin uSLIC
16-pin uSLIC
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125ºC
3.3
3.3
5
5
Adjustable
Adjustable
+ Denotes a lead(Pb)-free/RoHS-compliant package.
T = Tape and reel.
Maxim Integrated
│ 31
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MAXM17630/MAXM17631/
MAXM17632
4.5V to 36V, 1A Himalaya uSLIC
Step-Down Power Module
Revision History
REVISION REVISION
PAGES
CHANGED
DESCRIPTION
NUMBER
DATE
0
7/19
Initial release
—
Removed future product designation from MAXM17632AME+ and
MAXM17632AME+T in the Ordering Information table
1
10/19
31
1
1.1
Corrected typo in the General Description section
For pricing, delivery, and ordering information, please visit Maxim Integrated’s online storefront at https://www.maximintegrated.com/en/storefront/storefront.html.
Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent licenses
are implied. Maxim Integrated reserves the right to change the circuitry and specifications without notice at any time. The parametric values (min and max limits)
shown in the Electrical Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance.
©
Maxim Integrated and the Maxim Integrated logo are trademarks of Maxim Integrated Products, Inc.
2019 Maxim Integrated Products, Inc.
│ 32
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