MAXM15467AMBT [MAXIM]
4.5V to 42V, 300mA Himalaya uSLIC Step-Down Power Module;型号: | MAXM15467AMBT |
厂家: | MAXIM INTEGRATED PRODUCTS |
描述: | 4.5V to 42V, 300mA Himalaya uSLIC Step-Down Power Module |
文件: | 总26页 (文件大小:1242K) |
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.
MAXM15465/MAXM15466/
MAXM15467
4.5V to 42V, 300mA 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 MAXM15465/MAXM15466/MAXM15467
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 oper-
ate from 4.5V to 42V input and deliver up to 300mA
output current. The MAXM15465 and MAXM15466
are fixed 3.3V and 5V output modules respectively.
The MAXM15467 is an adjustable output (0.9V to
6.3V) module. The modules significantly reduce design
complexity, manufacturing risks, and offer a true plug and
play power/supply solution, reducing time-to-market.
• Wide 4.5V to 42V Input
• Adjustable 0.9V to 6.3V Output
• Fixed 3.3V and 5V Output
(MAXM15465 and MAXM15466)
• ±1.5% Feedback Accuracy
• Up to 300mA Output-Current
• Internally Compensated
• All Ceramic Capacitors
● High Efficiency
• Selectable PWM- or PFM-Mode of Operation
• Shutdown Current as Low as 2.2μA (typ)
● Flexible Design
• Internal Soft-Start and Prebias Startup
• Open-Drain Power Good Output (RESET Pin)
• Programmable EN/UVLO Threshold
The MAXM15465/6/7 modules employ peak-current-
mode control architecture. To reduce input inrush current,
the modules offer a fixed 3.75ms soft-start time.
● Robust Operation
The MAXM15465/6/7 modules are available in a low
profile, compact 10-pin, 2.6mm x 3mm x 1.5mm, uSLIC™
package.
• Hiccup Overcurrent Protection
• Overtemperature Protection
• -40°C to +125°C Ambient Operating Temperature/
-40°C to +150°C Junction Temperature
Applications
● Rugged
● Industrial Sensors and Encoders
● 4-20mA Current-Loop Powered Sensors
● LDO Replacement
● HVAC and Building Control
● Battery-Powered Equipment
● General Purpose Point-of-Load
● USB Type-C Powered loads
• Complies with CISPR22(EN55022) Class B
Conducted and Radiated Emissions
• Passes Drop, Shock, and Vibration Standards:
JESD22-B103, B104, B111
Ordering Information appears at end of data sheet.
uSLIC is a trademark of Maxim Integrated Products, Inc.
Typical Application Circuit 2.5V
Typical Application Circuit 5V
VOUT
2.5V, 300mA
VOUT
5V, 300mA
V
24V
V
IN
24V
IN
V
OUT
GND
V
OUT
GND
IN
IN
C
10µF
C
OUT
10µF
OUT
C
C
IN
1µF
IN
R3
133kΩ
R1
2.2MΩ
RESET
EN/UVLO
1µF
MAXM15467
EN/UVLO
MAXM15466
RESET
FB
LX
FB
LX
V
V
CC
CC
R2
825kΩ
R4
75kΩ
C1
1µF
C1
1µF
MODE
MODE
19-100447; Rev 0; 12/18
MAXM15465/MAXM15466/
MAXM15467
4.5V to 42V, 300mA Himalaya uSLIC
Step-Down Power Module
Absolute Maximum Ratings
IN
LX, OUT and GND .....................................-0.3V to (V + 0.3V)
V
, EN/UVLO to GND............................................-0.3V to 48V
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
V
, FB, RESET to GND..........................................-0.3V to 6V
CC
MODE to GND.......................................... -0.3V to (V
+ 0.3V)
CC
Output Short-Circuit Duration....................................Continuous
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: 10-PIN uSLIC
Package Code
M102A3+2
21-100094
90-100027
Outline Number
Land Pattern Number
THERMAL RESISTANCE, FOUR-LAYER BOARD (Note 2)
Junction to Ambient (θ 41.56 ºC/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, V
= 0V, C
= 1μF, FB = 1V (MAXM15467), FB = 3.6V (MAXM15465) FB = 5.5V (MAXM15466),
IN
EN/UVLO
GND
VCC
LX = MODE = RESET = OUT = unconnected; T = -40°C to +125°C, unless otherwise noted. Typical values are at T = +25°C.
A
A
All voltages are referenced to GND, unless otherwise noted.) (Note 3)
PARAMETER
INPUT SUPPLY (V
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
)
IN
Input-Voltage Range
V
4.5
42
4
V
IN
Input-Shutdown Current
Input-Supply Current
I
V
= 0V, shutdown mode
2.2
95
μA
IN-SH
EN/UVLO
MODE = unconnected,
FB = 1.03 × V
I
160
μA
Q-PFM
FB-REG
Normal switching mode, V = 24V ,
IN
MODE=0
I
3.2
mA
Q-PWM
ENABLE/UVLO (EN/UVLO)
V
V
V
V
rising
1.19
1.06
1.215
1.09
0.75
1.28
1.16
ENR
EN/UVLO
EN/UVLO
EN/UVLO
EN/UVLO Threshold
V
falling
V
ENF
EN-TRUESD
V
falling, true shutdown
EN/UVLO Input-Leakage
Current
I
T
= +25°C
-100
+100
nA
EN/UVLO
A
LDO (V
)
CC
V
V
Output-Voltage Range
Current Limit
V
6V < V < 42V, 0mA < I < 10mA
VCC
4.75
13
5
5.25
50
V
CC
CC
IN
I
V
= 4.3V
30
mA
CC
VCC-MAX
CC
Maxim Integrated
│ 2
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MAXM15465/MAXM15466/
MAXM15467
4.5V to 42V, 300mA Himalaya uSLIC
Step-Down Power Module
Electrical Characteristics (continued)
(V = V
= 24V, V
= 0V, C
= 1μF, FB = 1V (MAXM15467), FB = 3.6V (MAXM15465) FB = 5.5V (MAXM15466),
IN
EN/UVLO
GND
VCC
LX = MODE = RESET = OUT = unconnected; T = -40°C to +125°C, unless otherwise noted. Typical values are at T = +25°C.
A
A
All voltages are referenced to GND, unless otherwise noted.) (Note 3)
PARAMETER
Dropout
SYMBOL
CONDITIONS
= 4.5V, I = 5mA
VCC
MIN
TYP
0.15
4.18
3.8
MAX
0.3
UNITS
V
V
V
V
V
V
V
CC
CC-DO
IN
V
rising
falling
4.05
3.7
4.3
CC-UVR
CC
CC
UVLO
V
CC
V
3.95
CC-UVF
SOFT-START (SS)
Soft-Start Time
t
3.5
3.75
4
ms
SS
FEEDBACK (FB)
MODE = GND, MAXM15467
MODE = unconnected, MAXM15467
MODE = GND, MAXM15465
MODE = unconnected, MAXM15465
MODE = GND, MAXM15466
MODE = unconnected, MAXM15466
MAXM15467
0.887
0.887
3.25
3.25
4.93
4.93
-100
0.90
0.915
3.30
3.35
5.00
5.08
-25
0.913
0.936
3.35
3.42
5.07
5.18
FB-Regulation Voltage
V
V
FB-REG
FB-Leakage Current
TIMING
I
nA
FB
Switching Frequency
f
515
550
585
kHz
%
SW
FB Undervoltage Trip Level to
Cause Hiccup
62.5
64.5
66.5
Hiccup Timeout
120
90
ms
ns
%
Minimum On-Time
Maximum Duty Cycle
t
120
94
ON-MIN
D
FB = 0.98 x FB
89
91.4
MAX
REG
RESET
FB Threshold for RESET
Rising
FB rising
93.5
90
95.5
92
97.5
94
%
%
FB Threshold for RESET
Falling
FB falling
RESET Delay After FB
Reaches Rising Threshold
1.9
ms
V
0.2
0.1
I
= 5mA
RESET Output-Level Low
RESET
RESET Output-Leakage
Current
μA
V
= 5.5V, T = +25°C
A
RESET
MODE
MODE Internal Pullup
Resistor
500
kΩ
THERMAL SHUTDOWN
Thermal-Shutdown
Threshold
Temperature rising
166
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
│ 3
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MAXM15465/MAXM15466/
MAXM15467
4.5V to 42V, 300mA Himalaya uSLIC
Step-Down Power Module
Typical Operating Characteristics
(V = V
= 24V, V
= 0V, T = -40°C to +125°C, unless otherwise noted. Typical values are at T = +25°C. All voltages are
IN
EN/UVLO
GND A A
referenced to GND, unless otherwise noted. The circuit values for different output-voltage applications are as in Table 1, unless other-
wise noted.)
MAXM15467
EFFICIENCY vs. LOAD CURRENT
ADJUSTABLE VOUT = 1.5V, PWM MODE
MAXM15467
EFFICIENCY vs. LOAD CURRENT
ADJUSTABLE VOUT = 0.9V, PWM MODE
MAXM15467
EFFICIENCY vs. LOAD CURRENT
ADJUSTABLE VOUT = 2.5V, PWM MODEtoc03
toc02
toc01
100
90
80
70
60
50
40
30
20
10
0
100
90
80
70
60
50
40
30
20
10
0
100
90
80
70
60
50
40
30
20
10
0
VIN = 5V
VIN = 5V
VIN = 5V
VIN = 12V
VIN = 24V
VIN = 36V
VIN = 12V
VIN = 20V
VIN = 12V
0
30 60 90 120 150 180 210 240 270 300
LOAD CURRENT (mA)
0
30 60 90 120 150 180 210 240 270 300
LOAD CURRENT (mA)
0
30 60 90 120 150 180 210 240 270 300
LOAD CURRENT (mA)
MAXM15467
EFFICIENCY vs. LOAD CURRENT
ADJUSTABLE VOUT = 6.3V, PWM MODE
MAXM15467
MAXM15467
EFFICIENCY vs. LOAD CURRENT
ADJUSTABLE VOUT = 5V, PWM MODE
EFFICIENCY vs
. LOAD CURRENT
ADJUSTABLE VOUT = 3.3V, PWM MODE
toc05
toc06
toc04
100
90
80
70
60
50
40
30
20
10
0
100
90
80
70
60
50
40
30
20
10
0
100
90
80
70
60
50
40
30
20
10
0
VIN = 12V
VIN = 24V
VIN = 5.5V
VIN = 12V
VIN = 12V
VIN = 24V
VIN = 36V
VIN = 36V
VIN = 24V
VIN = 36V
0
30 60 90 120 150 180 210 240 270 300
LOAD CURRENT (mA)
0
30 60 90 120 150 180 210 240 270 300
LOAD CURRENT (mA)
0
30 60 90 120 150 180 210 240 270 300
LOAD CURRENT (mA)
MAXM15467
EFFICIENCY vs. LOAD CURRENT
ADJUSTABLE VOUT = 0.9V, PFM MODE
MAXM15466
EFFICIENCY vs. LOAD CURRENT
FIXED VOUT = 5V, PWM MODE
MAXM15465
EFFICIENCY vs. LOAD CURRENT
FIXED VOUT = 3.3V, PWM MODE
toc08
toc07
toc09
100
90
80
70
60
50
40
30
20
10
0
100
90
80
70
60
50
40
30
20
10
0
100
90
80
70
60
50
40
30
20
10
0
VIN = 5V
VIN = 12V
VIN = 24V
VIN = 5.5V
VIN = 12V
VIN = 36V
VIN = 12V
VIN = 24V
VIN = 36V
0
30 60 90 120 150 180 210 240 270 300
LOAD CURRENT (mA)
0
30 60 90 120 150 180 210 240 270 300
LOAD CURRENT (mA)
1
10
100
LOAD CURRENT (mA)
Maxim Integrated
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MAXM15465/MAXM15466/
MAXM15467
4.5V to 42V, 300mA Himalaya uSLIC
Step-Down Power Module
Typical Operating Characteristics (continued)
(V = V
= 24V, V
= 0V, T = -40°C to +125°C, unless otherwise noted. Typical values are at T = +25°C. All voltages are
IN
EN/UVLO
GND A A
referenced to GND, unless otherwise noted. The circuit values for different output-voltage applications are as in Table 1, unless other-
wise noted.)
MAXM15467
MAXM15467
MAXM15467
EFFICIENCY vs. LOAD CURRENT
ADJUSTABLE VOUT = 2.5V, PFM MODE
EFFICIENCY vs
.
LOAD CURRENT
EFFICIENCY vs
.
LOAD CURRENT
ADJUSTABLE VOUT = 3.3V, PFM MODE
ADJUSTABLE VOUT = 1.5V, PFM MODE
toc10
toc11
toc12
toc15
toc18
100
90
80
70
60
50
40
30
20
10
0
100
90
80
70
60
50
40
30
20
10
0
100
90
80
70
60
50
40
30
20
10
0
VIN = 5.5V
VIN = 5V
VIN = 5V
VIN = 36V
VIN = 36V
VIN =12V
VIN = 20V
VIN = 12V
VIN = 24V
VIN = 24V
VIN = 12V
100
1
10
100
1
1
1
10
100
1
10
LOAD CURRENT (mA)
LOAD CURRENT (mA)
LOAD CURRENT (mA)
MAXM15467
EFFICIENCY vs. LOAD CURRENT
ADJUSTABLE VOUT = 5V, PFM MODE
MAXM15467
MAXM15465
EFFICIENCY vs. LOAD CURRENT
ADJUSTABLE VOUT = 6.3V, PFM MODE
EFFICIENCY vs. LOAD CURRENT
FIXED VOUT = 3.3V, PFM MODE
toc13
toc14
100
90
80
70
60
50
40
30
20
10
0
100
90
80
70
60
50
40
30
20
10
0
100
90
80
70
60
50
40
30
20
10
0
VIN = 5.5V
VIN = 36V
VIN = 36V
VIN = 36V
VIN = 24V
VIN = 12V
VIN = 24V
VIN = 12V
VIN=24V
VIN = 12V
1
10
100
10
100
1
10
100
LOAD CURRENT (mA)
LOAD CURRENT (mA)
LOAD CURRENT (mA)
MAXM15467
MAXM15466
EFFICIENCY vs. LOAD CURRENT
FIXED VOUT = 5V, PFM MODE
MAXM15467
OUTPUT VOLTAGEvs. LOAD CURRENT
ADJUSTABLE VOUT = 1.5V, PWM MODE
OUTPUT VOLTAGEvs. LOAD CURRENT
ADJUSTABLE VOUT = 0.9V, PWM MODE
toc16
toc17
1.500
1.498
1.496
1.494
1.492
1.490
1.488
1.486
1.484
0.904
0.903
0.902
0.901
0.900
0.899
0.898
0.897
0.896
100
90
80
70
60
50
40
30
20
10
0
VIN = 5V
VIN = 5V
VIN = 12V
VIN = 36V
VIN = 24V
VIN = 12V
VIN = 20V
VIN = 12V
0
30 60 90 120 150 180 210 240 270 300
LOAD CURRENT (mA)
10
100
0
30 60 90 120 150 180 210 240 270 300
LOAD CURRENT (mA)
LOAD CURRENT (mA)
Maxim Integrated
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MAXM15465/MAXM15466/
MAXM15467
4.5V to 42V, 300mA Himalaya uSLIC
Step-Down Power Module
Typical Operating Characteristics (continued)
(V = V
= 24V, V
= 0V, T = -40°C to +125°C, unless otherwise noted. Typical values are at T = +25°C. All voltages are
IN
EN/UVLO
GND A A
referenced to GND, unless otherwise noted. The circuit values for different output-voltage applications are as in Table 1, unless other-
wise noted.)
MAXM15467
MAXM15467
MAXM15467
OUTPUT VOLTAGEvs. LOAD CURRENT
OUTPUT VOLTAGEvs
.
LOAD CURRENT
OUTPUT VOLTAGEvs
.
LOAD CURRENT
ADJUSTABLE VOUT = 3.3V, PWM MODE
ADJUSTABLE VOUT = 5V, PWM MODE
ADJUSTABLE VOUT = 2.5V, PWM MODE
toc19
toc20
toc21
3.300
3.292
3.284
3.276
3.268
3.260
3.252
3.244
3.236
3.228
5.10
5.08
5.06
5.04
5.02
5.00
2.504
2.498
2.492
2.486
2.480
2.474
2.468
2.462
2.456
2.450
VIN = 12V
VIN = 24V
VIN = 5.5V
VIN = 12V
VIN = 24V
VIN = 12V
VIN = 24V
VIN = 5V
VIN = 36V
VIN = 36V
VIN = 36V
0
30 60 90 120 150 180 210 240 270 300
LOAD CURRENT (mA)
0
30 60 90 120 150 180 210 240 270 300
LOAD CURRENT (mA)
0
30 60 90 120 150 180 210 240 270 300
LOAD CURRENT (mA)
MAXM15467
MAXM15466
MAXM15465
OUTPUT VOLTAGEvs. LOAD CURRENT
OUTPUT VOLTAGEvs
. LOAD CURRENT
OUTPUT VOLTAGEvs
. LOAD CURRENT
ADJUSTABLE VOUT = 6.3V, PWM MODE
FIXED VOUT = 5V, PWM MODE
FIXED VOUT = 3.3V, PWM MODE
toc23
toc24
toc22
3.306
3.304
3.302
3.300
3.298
3.296
3.294
5.004
5.002
5.000
4.998
4.996
4.994
6.40
6.38
6.36
6.34
6.32
6.30
6.28
6.26
6.24
6.22
6.20
VIN = 36V
VIN = 12V
VIN = 24V
VIN = 5.5V
V
IN = 36V
VIN = 12V
VIN = 24V
VIN = 36V
VIN = 24V
VIN = 12V
0
30 60 90 120 150 180 210 240 270 300
LOAD CURRENT (mA)
0
30 60 90 120 150 180 210 240 270 300
LOAD CURRENT (mA)
0
30 60 90 120 150 180 210 240 270 300
LOAD CURRENT (mA)
MAXM15467
OUTPUT VOLTAGEvs. LOAD CURRENT
MAXM15467
OUTPUT VOLTAGEvs. LOAD CURRENT
MAXM15467
OUTPUT VOLTAGEvs. LOAD CURRENT
ADJUSTABLE VOUT = 1.5V, PFM MODE
ADJUSTABLE VOUT = 0.9V, PFM MODE
ADJUSTABLE VOUT = 2.5V, PFM MODE
toc25
toc26
toc27
1.55
1.54
1.53
1.52
1.51
1.50
1.49
1.48
2.58
2.56
2.54
2.52
2.50
2.48
2.46
2.44
0.934
0.925
0.916
0.907
0.898
0.889
0.88
VIN = 5V
VIN = 5V
VIN =12V
VIN = 36V
VIN = 20V
VIN =12V
VIN = 24V
VIN =12V
V
IN = 5V
0
30 60 90 120 150 180 210 240 270 300
LOAD CURRENT (mA)
0
30 60 90 120 150 180 210 240 270 300
LOAD CURRENT (mA)
0
30 60 90 120 150 180 210 240 270 300
LOAD CURRENT (mA)
Maxim Integrated
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MAXM15465/MAXM15466/
MAXM15467
4.5V to 42V, 300mA Himalaya uSLIC
Step-Down Power Module
Typical Operating Characteristics (continued)
(V = V
= 24V, V
= 0V, T = -40°C to +125°C, unless otherwise noted. Typical values are at T = +25°C. All voltages are
IN
EN/UVLO
GND A A
referenced to GND, unless otherwise noted. The circuit values for different output-voltage applications are as in Table 1, unless other-
wise noted.)
MAXM15467
MAXM15467
MAXM15467
OUTPUT VOLTAGEvs. LOAD CURRENT
ADJUSTABLE VOUT = 3.3V, PFM MODE
OUTPUT VOLTAGEvs
ADJUSTABLE VOUT = 5V, PFM MODE
.
LOAD CURRENT
OUTPUT VOLTAGEvs
ADJUSTABLE VOUT = 6.3V, PFM MODE
.
LOAD CURRENT
toc28
toc29
toc30
5.20
5.18
5.16
5.14
5.12
5.10
5.08
5.06
5.04
5.02
5.00
6.50
6.47
6.44
6.41
6.38
6.35
6.32
6.29
6.26
6.23
6.20
3.390
3.370
3.350
3.330
3.310
3.290
3.270
3.250
VIN = 36V
VIN = 36V
VIN = 36V
VIN = 24V
VIN = 12V
VIN = 24V
VIN = 24V
VIN = 12V
VIN =12V
VIN = 5.5V
0
30 60 90 120 150 180 210 240 270 300
0
30 60 90 120 150 180 210 240 270 300
LOAD CURRENT (mA)
0
30 60 90 120 150 180 210 240 270 300
LOAD CURRENT (mA)
LOAD CURRENT (mA)
MAXM15465
OUTPUT VOLTAGEvs. LOAD CURRENT
MAXM15466
OUTPUT VOLTAGEvs. LOAD CURRENT
MAXM15467 OUTPUT VOLTAGE RIPPLE
VIN = 12V, ADJUSTABLE VOUT = 1.5V,
FULL LOAD, PWM MODE
FIXED VOUT = 3.3V, PFM MODE
FIXED VOUT = 5V, PFM MODE
toc31
toc33
toc32
3.390
3.370
3.350
3.330
3.310
3.290
3.270
3.250
5.110
5.085
5.060
5.035
5.010
4.985
4.960
VIN = 24V
VIN = 12V
VIN = 24V
VIN = 12V
VIN = 5.5V
VIN = 36V
10mV/div
VOUT(AC)
VIN = 36V
2µs/div
0
30 60 90 120 150 180 210 240 270 300
LOAD CURRENT (mA)
0
30 60 90 120 150 180 210 240 270 300
LOAD CURRENT (mA)
MAXM15467 OUTPUT VOLTAGE RIPPLE
VIN = 24V, ADJUSTABLE VOUT = 3.3V,
MAXM15465 OUTPUT VOLTAGE RIPPLE
VIN = 24V, FIXED VOUT = 3.3V,
FULL LOAD, PWM MODE
MAXM15467 OUTPUT VOLTAGE RIPPLE
VIN = 24V, ADJUSTABLE VOUT = 5V,
FULL LOAD, PWM MODE
toc36
FULL LOAD, PWM MODE
toc34
toc35
VOUT(AC)
10mV/div
VOUT(AC)
10mV/div
VOUT(AC)
10mV/div
2µs/div
2µs/div
2µs/div
Maxim Integrated
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MAXM15465/MAXM15466/
MAXM15467
4.5V to 42V, 300mA Himalaya uSLIC
Step-Down Power Module
Typical Operating Characteristics (continued)
(V = V
= 24V, V
= 0V, T = -40°C to +125°C, unless otherwise noted. Typical values are at T = +25°C. All voltages are
IN
EN/UVLO
GND A A
referenced to GND, unless otherwise noted. The circuit values for different output-voltage applications are as in Table 1, unless other-
wise noted.)
MAXM15466 OUTPUT VOLTAGE RIPPLE
VIN = 24V, FIXED VOUT = 5V
MAXM15467 INPUT VOLTAGE RIPPLE
VIN = 24V, ADJUSTABLE VOUT = 3.3V,
FULL LOAD, PWM MODE
MAXM15467 INPUT VOLTAGE RIPPLE
VIN = 12V, ADJUSTABLE VOUT = 1.5V
FULL LOAD, PWM MODE
FULL LOAD, PWM MODE
toc39
toc38
toc37
VIN(AC)
VIN(AC)
50mV/div
50mV/div
V
(AC)
OUT
10mV/div
2µs/div
2µs/div
2µs/div
MAXM15465 INPUT VOLTAGE RIPPLE
VIN = 24V, FIXED VOUT = 3.3V,
FULL LOAD, PWM MODE
MAXM15466 INPUT VOLTAGE RIPPLE
VIN = 24V, FIXED VOUT = 5V
MAXM15467 INPUT VOLTAGE RIPPLE
VIN = 24V, ADJUSTABLE VOUT = 5V,
FULL LOAD, PWM MODE
FULL LOAD, PWM MODE
toc41
toc42
toc40
VIN(AC)
100mV/div
VIN(AC)
100mV/div
VIN(AC)
50mV/div
2µs/div
2µs/div
2µs/div
MAXM15467 LOAD TRANSIENT RESPONSE
VIN = 12V, ADJUSTABLE VOUT = 1.5V, PFM MODE
(LOAD CURRENT STEPPED FROM 5mA to 150 A)
MAXM15467 LOAD TRANSIENT RESPONSE
VIN = 12V, ADJUSTABLE VOUT = 1.5V, PWM MODE
MAXM15467 LOAD TRANSIENT RESPONSE
VIN = 24V, ADJUSTABLE VOUT = 3.3V, PFM MODE
(LOAD CURRENT STEPPED FROM 5mA TO 150mA)
(LOAD CURRENT STEPPED FROM 150mA TO 300mA)
m
toc44
toc45
toc43
VOUT(AC)
50mV/div
100mV/div
VOUT(AC)
50mV/div
VOUT(AC)
100mA/div
IOUT
100mA/div
IOUT
IOUT
100mA/div
100µs/div
100µs/div
100µs/div
Maxim Integrated
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MAXM15465/MAXM15466/
MAXM15467
4.5V to 42V, 300mA Himalaya uSLIC
Step-Down Power Module
Typical Operating Characteristics (continued)
(V = V
= 24V, V
= 0V, T = -40°C to +125°C, unless otherwise noted. Typical values are at T = +25°C. All voltages are
IN
EN/UVLO
GND A A
referenced to GND, unless otherwise noted. The circuit values for different output-voltage applications are as in Table 1, unless other-
wise noted.)
MAXM15467 LOAD TRANSIENT RESPONSE
VIN=24V, ADJUSTABLE VOUT = 3.3V, PWM MODE
MAXM15467 LOAD TRANSIENT RESPONSE
VIN = 24V, ADJUSTABLE VOUT = 5V, PFM MODE
MAXM15467 LOAD TRANSIENT RESPONSE
VIN = 24V, ADJUSTABLE VOUT = 5V, PWM MODE
(LOAD CURRENT STEPPED FROM 5mA TO 150mA)
(LOAD CURRENT STEPPED FROM 150mA TO 300mA)
(LOAD CURRENT STEPPED FROM 150mA TO 300mA)
toc48
toc46
toc47
VOUT(AC)
100mV/div
VOUT(AC)
100mV/div
100mA/div
200mV/div
VOUT(AC)
100mA/div
IOUT
IOUT
100mA/div
IOUT
100µs/div
100µs/div
100µs/div
MAXM15466 LOAD TRANSIENT RESPONSE
VIN = 24V, FIXED VOUT = 5V, PFM MODE
MAXM15465 LOAD TRANSIENT RESPONSE
VIN = 24V, FIXED VOUT = 3.3V, PFM MODE
MAXM15465 LOAD TRANSIENT RESPONSE
VIN = 24V, FIXED VOUT = 3.3V, PWM MODE
(LOAD CURRENT STEPPED FROM 5mA TO 150mA)
(LOAD CURRENT STEPPED FROM 5mA TO 150mA)
(LOAD CURRENT STEPPED FROM 150mA TO 300mA)
toc49
toc51
toc50
VOUT(AC)
100mV/div
100mV/div
200mV/div
VOUT(AC)
VOUT(AC)
100mA/div
IOUT
IOUT
IOUT
100mA/div
100mA/div
100µs/div
100µs/div
100µs/div
MAXM15466 LOAD TRANSIENT RESPONSE
VIN = 24V, FIXED VOUT = 5V, PWM MODE
MAXM15467 SHUTDOWN THROUGH ENABLE
MAXM15467 STARTUP THROUGH ENABLE
VIN = 12V, ADJUSTABLE VOUT = 1.5V,
FULL LOAD, PWM MODE
VIN = 12V, ADJUSTABLE VOUT = 1.5V,
(LOAD CURRENT STEPPED FROM 150mA TO 300mA)
FULL LOAD, PWM MODE
toc52
toc53
toc54
5V/div
VOUT(AC)
EN/UVLO
LX
5V/div
100mV/div
EN/UVLO
LX
10V/div
1V/div
10V/div
100mA/div
1V/div
5V/div
VOUT
VOUT
5V/div
RESET
IOUT
RESET
1ms/div
100µs/div
100µs/div
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MAXM15465/MAXM15466/
MAXM15467
4.5V to 42V, 300mA Himalaya uSLIC
Step-Down Power Module
Typical Operating Characteristics (continued)
(V = V
= 24V, V
= 0V, T = -40°C to +125°C, unless otherwise noted. Typical values are at T = +25°C. All voltages are
IN
EN/UVLO
GND A A
referenced to GND, unless otherwise noted. The circuit values for different output-voltage applications are as in Table 1, unless other-
wise noted.)
MAXM15467 STARTUP THROUGH ENABLE (2V PREBIAS)
MAXM15467 STARTUP THROUGH ENABLE
VIN = 24V, ADJUSTABLE VOUT = 3.3V,
MAXM15467 SHUTDOWN THROUGH ENABLE
VIN = 24V, ADJUSTABLE VOUT = 3.3V,
VIN = 24V, ADJUSTABLE VOUT = 3.3V,
NO LOAD, PWM MODE
FULL LOAD, PWM MODE
toc55
FULL LOAD, PWM MODE
toc56
toc57
5V/div
5V/div
EN/UVLO
LX
EN/UVLO
LX
EN/UVLO
LX
5V/div
20V/div
2V/div
20V/div
2V/div
20V/div
VOUT
VOUT
5V/div
5V/div
2V/div
5V/div
VOUT
RESET
RESET
RESET
100µs/div
1ms/div
1ms/div
MAXM15467 STARTUP THROUGH ENABLE (2V PREBIAS)
VIN = 24V, ADJUSTABLE VOUT = 3.3V,
MAXM15467 STARTUP THROUGH ENABLE
VIN = 24V, ADJUSTABLE VOUT = 5V,
MAXM15467 SHUTDOWN THROUGH ENABLE
VIN = 24V, ADJUSTABLE VOUT = 5V,
NO LOAD, PFM MODE
FULL LOAD, PWM MODE
FULL LOAD, PWM MODE
toc58
toc59
toc60
5V/div
5V/div
EN/UVLO
EN/UVLO
LX
EN/UVLO
LX
5V/div
LX
20V/div
2V/div
20V/div
2V/div
20V/div
VOUT
VOUT
5V/div
2V/div
5V/div
VOUT
5V/div
RESET
RESET
RESET
1ms/div
1ms/div
100µs/div
MAXM15465 STARTUP THROUGH ENABLE
MAXM15465 SHUTDOWN THROUGH ENABLE
VIN = 24V, FIXED VOUT = 3.3V,
MAXM15465 STARTUP THROUGH ENABLE (2V PREBIAS)
VIN = 24V, FIXED VOUT = 3.3V,
VIN = 24V, FIXED VOUT = 3.3V,
FULL LOAD, PWM MODE
NO LOAD, PWM MODE
FULL LOAD, PWM MODE
toc61
toc62
toc63
5V/div
5V/div
EN/UVLO
LX
5V/div
EN/UVLO
EN/UVLO
LX
20V/div
2V/div
5V/div
LX
20V/div
2V/div
20V/div
VOUT
5V/div
VOUT
2V/div
5V/div
VOUT
RESET
RESET
RESET
1ms/div
1ms/div
100µs/div
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MAXM15465/MAXM15466/
MAXM15467
4.5V to 42V, 300mA Himalaya uSLIC
Step-Down Power Module
Typical Operating Characteristics (continued)
(V = V
= 24V, V
= 0V, T = -40°C to +125°C, unless otherwise noted. Typical values are at T = +25°C. All voltages are
IN
EN/UVLO
GND A A
referenced to GND, unless otherwise noted. The circuit values for different output-voltage applications are as in Table 1, unless other-
wise noted.)
MAXM15466 STARTUP THROUGH ENABLE
VIN = 24V, FIXED VOUT = 5V,
MAXM15466 SHUTDOWN THROUGH ENABLE
VIN = 24V, FIXED VOUT = 5V,
MAXM15465 STARTUP THROUGH ENABLE (2V PREBIAS)
VIN = 24V, FIXED VOUT = 3.3V,
FULL LOAD, PWM MODE
FULL LOAD, PWM MODE
NO LOAD, PFM MODE
toc65
toc66
toc64
5V/div
5V/div
EN/UVLO
LX
EN/UVLO
LX
5V/div
EN/UVLO
20V/div
2V/div
LX
20V/div
2V/div
20V/div
VOUT
VOUT
2V/div
5V/div
VOUT
5V/div
5V/div
RESET
RESET
RESET
1ms/div
100µs/div
1ms/div
MAXM15466 STARTUP THROUGH ENABLE (2.5V PREBIAS)
VIN = 24V, FIXED VOUT = 5V,
MAXM15466 STARTUP THROUGH ENABLE (2.5V PREBIAS)
VIN = 24V, FIXED VOUT = 5V,
MAXM15467 STARTUP THROUGH VIN
VIN = 12V, ADJUSTABLE VOUT = 1.5V,
FULL LOAD, PWM MODE
NO LOAD, PFM MODE
NO LOAD, PWM MODE
toc67
toc68
toc69
10V/div
10V/div
5V/div
5V/div
EN/UVLO
EN/UVLO
LX
VIN
LX
20V/div
2V/div
LX
20V/div
2V/div
2V/div
500mV/div
VOUT
5V/div
VOUT
VCC
5V/div
RESET
VOUT
RESET
1ms/div
1ms/div
1ms/div
MAXM15467 SHUTDOWN THROUGH VIN
VIN = 12V, ADJUSTABLE VOUT = 1.5V,
MAXM15467 SHUTDOWN THROUGH VIN
VIN = 24V, ADJUSTABLE VOUT = 3.3V,
FULL LOAD, PWM MODE
MAXM15467 STARTUP THROUGH VIN
VIN = 24V, ADJUSTABLE VOUT = 3.3V,
FULL LOAD, PWM MODE
toc70
toc72
toc71
FULL LOAD, PWM MODE
20V/div
10V/div
10V/div
VIN
LX
VIN
LX
20V/div
20V/div
VIN
LX
20V/div
2V/div
2V/div
2V/div
VCC
VCC
2V/div
2V/div
VCC
VOUT
500mV/div
VOUT
VOUT
1ms/div
1ms/div
1ms/div
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MAXM15465/MAXM15466/
MAXM15467
4.5V to 42V, 300mA Himalaya uSLIC
Step-Down Power Module
Typical Operating Characteristics (continued)
(V = V
= 24V, V
= 0V, T = -40°C to +125°C, unless otherwise noted. Typical values are at T = +25°C. All voltages
IN
EN/UVLO
GND A A
are referenced to GND, unless otherwise noted. The circuit values for different output-voltage applications are as in Table 1, unless
otherwise noted.)
MAXM15465 STARTUP THROUGH VIN
VIN = 24V, FIXED VOUT = 3.3V,
FULL LOAD, PWM MODE
MAXM15467 STARTUP THROUGH VIN
VIN = 24V, ADJUSTABLE VOUT = 5V,
FULL LOAD, PWM MODE
MAXM15467 SHUTDOWN THROUGH VIN
VIN = 24V, ADJUSTABLE VOUT = 5V,
FULL LOAD, PWM MODE
toc73
toc75
toc74
20V/div
20V/div
VIN
LX
VIN
LX
VIN
LX
20V/div
20V/div
20V/div
2V/div
20V/div
2V/div
2V/div
2V/div
2V/div
2V/div
VCC
VCC
VCC
VOUT
VOUT
VOUT
1ms/div
1ms/div
1ms/div
MAXM15466 SHUTDOWN THROUGH VIN
VIN = 24V, FIXED VOUT = 5V,
MAXM15465 SHUTDOWN THROUGH VIN
VIN = 24V, FIXED VOUT = 3.3V,
FULL LOAD, PWM MODE
MAXM15466 STARTUP THROUGH VIN
VIN = 24V, FIXED VOUT = 5V,
FULL LOAD, PWM MODE
FULL LOAD, PWM MODE
toc78
toc77
toc76
20V/div
VIN
LX
20V/div
20V/div
VIN
LX
20V/div
20V/div
VIN
LX
20V/div
2V/div
2V/div
VCC
2V/div
2V/div
2V/div
2V/div
VCC
VCC
VOUT
VOUT
VOUT
1ms/div
1ms/div
1ms/div
MAXM15465 OUTPUT SHORT IN STEADY STATE
VIN = 24V, FIXED VOUT = 3.3V,
MAXM15467 OUTPUT SHORT IN STEADY STATE
VIN = 24V, ADJUSTABLE VOUT = 3.3V,
MAXM15467 OUTPUT SHORT DURING STARTUP
VIN = 24V, ADJUSTABLE VOUT = 3.3V,
FULL LOAD, PWM MODE
FULL LOAD, PWM MODE
FULL LOAD, PWM MODE
toc79
toc80
toc81
20V/div
5V/div
5V/div
VIN
SHORT
SHORT
VOUT
VOUT
LX
VOUT
20mV/div
2V/div
2V/div
20V/div
LX
LX
20V/div
20V/div
IOUT
IOUT
500mA/div
10mA/div
IOUT
200mA/div
20ms/div
20ms/div
20ms/div
Maxim Integrated
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MAXM15465/MAXM15466/
MAXM15467
4.5V to 42V, 300mA Himalaya uSLIC
Step-Down Power Module
Typical Operating Characteristics (continued)
(V = V
= 24V, V
= 0V, T = -40°C to +125°C, unless otherwise noted. Typical values are at T = +25°C. All voltages
IN
EN/UVLO
GND A A
are referenced to GND, unless otherwise noted. The circuit values for different output-voltage applications are as in Table 1, unless
otherwise noted.)
MAXM15466 OUTPUT SHORT IN STEADY-STATE
VIN = 24V, FIXED VOUT = 5V,
MAXM15465 OUTPUT SHORT DURING STARTUP
= 24V, FIXED V = 3.3V,
V
IN
OUT
FULL LOAD, PWM MODE
FULL LOAD, PWM MODE
toc82
toc83
20V/div
5V/div
SHORT
VOUT
VIN
VOUT
20mV/div
20V/div
5V/div
LX
LX
20V/div
IOUT
IOUT
500mA/div
10mA/div
20ms/div
20ms/div
MAXM15467 BODE PLOT
VIN = 12V, ADJUSTABLE VOUT = 1.5V,
FULL LOAD, PWM MODE
MAXM15466 OUTPUT SHORT DURING STARTUP
VIN = 24V, FIXED VOUT = 5V,
toc85
FULL LOAD, PWM MODE
toc84
100
80
100
80
20V/div
PHASE
60
VIN
60
40
40
20
20
VOUT
20mV/div
0
0
GAIN
-20
-40
-60
-80
-20
-40
-60
-80
LX
20V/div
CROSSOVER FREQUENCY = 49.294kHz
PHASE MARGIN = 46.023
IOUT
◦
10mA/div
20ms/div
1k
10k
100k
FREQUENCY (Hz)
MAXM15467 BODE PLOT
VIN = 24V, ADJUSTABLE VOUT = 3.3V,
FULL LOAD, PWM MODE
MAXM15467 BODE PLOT
VIN = 24V, ADJUSTABLE VOUT = 5V,
FULL LOAD, PWM MODE
toc86
toc87
100
80
100
80
100
80
100
80
PHASE
PHASE
60
60
60
60
40
40
40
40
20
20
20
20
0
0
0
0
GAIN
GAIN
-20
-40
-60
-80
-20
-40
-60
-80
-20
-40
-60
-80
-20
-40
-60
-80
CROSSOVER FREQUENCY = 47.638 kHz
PHASE MARGIN = 49.468
CROSSOVER FREQUENCY = 37.212 kHz
PHASE MARGIN = 54.136
°
°
1k
10k
100k
1k
10k
100k
FREQUENCY (Hz)
FREQUENCY (Hz)
Maxim Integrated
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MAXM15465/MAXM15466/
MAXM15467
4.5V to 42V, 300mA Himalaya uSLIC
Step-Down Power Module
Typical Operating Characteristics (continued)
(V = V
= 24V, V
= 0V, T = -40°C to +125°C, unless otherwise noted. Typical values are at T = +25°C. All voltages
IN
EN/UVLO
GND A A
are referenced to GND, unless otherwise noted. The circuit values for different output-voltage applications are as in Table 1, unless
otherwise noted.)
MAXM15465 BODE PLOT
VIN = 24V, FIXED VOUT = 3.3V,
FULL LOAD, PWM MODE
MAXM15466 BODE PLOT
VIN = 24V, FIXED VOUT = 5V,
FULL LOAD, PWM MODE
toc88
toc89
100
80
100
80
100
80
100
80
PHASE
PHASE
60
60
60
60
40
40
40
40
20
20
20
20
0
0
0
0
GAIN
GAIN
-20
-40
-60
-80
-20
-40
-60
-80
-20
-40
-60
-80
-20
-40
-60
-80
CROSSOVER FREQUENCY = 45.746 kHz
PHASE MARGIN = 54.585
CROSSOVER FREQUENCY = 45.639 kHz
PHASE MARGIN = 58.503
°
°
1k
10k
100k
1k
10k
100k
FREQUENCY (Hz)
FREQUENCY (Hz)
MAXM15465/6
MAXM15467
OUTPUT CURRENT vs. AMBIENT TEMPERATURE
OUTPUT CURRENT vs. AMBIENT TEMPERATURE
toc90
toc91
350
350
300
250
200
150
100
50
300
250
200
150
100
50
FIXED VOUT = 3.3V
ADJUSTABLE VOU T = 2.5V
FIXED VOUT = 5V
0
0
50
70
90
110
130
50
70
90
110
130
AMBIENT TEMPERATURE (°C)
AMBIENT TEMPERATURE (°C)
CONDUCTED EMISSION PLOT
RADIATED EMISSION PLOT
(WITH FILTER C = 0.1µF + 0.68µF, L = 82µH, C = 1µF)
toc93
toc92
50
CISPR-22 CLASS B QP LIMIT
60
CISPR-22 CLASS B QP LIMIT
40
30
20
CISPR-22 CLASS B AVG LIMIT
50
40
VERTICAL
SCAN
30
PEAK
EMISSION
10
0
20
AVERAGE
EMISSION
HORIZONTAL
SCAN
10
-10
100M
30M
1G
150k
1M
10M
= 5V, I
FREQUENCY(Hz)
FREQUENCY (Hz)
CONDITIONS : VIN = 24V, VOUT = 5V, IOUT = 0.3A
CONDITIONS : V = 24V, V
= 0.3A
IN
OUT
OUT
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MAXM15465/MAXM15466/
MAXM15467
4.5V to 42V, 300mA Himalaya uSLIC
Step-Down Power Module
Pin Configuration
TOP VIEW
+
LX
GND
1
2
3
4
5
10
9
V
V
IN
IN
MAXM15465
MAXM15466
MAXM15467
RESET
MODE
OUT
8
EN/UVLO
7
V
CC
6
FB
‘+’ INDICATES PIN 1 OF THE MODULE
Pin Description
PIN
NAME
FUNCTION
1
LX
Switching Node of the Inductor. No external connection to this pin.
Ground Pin. Connect GND to the ground plane. See the PCB Layout Guidelines section for more details.
Refer to the MAXM15467 EV kit for a sample layout.
2
GND
Open-Drain Power-Good Output. Pull up RESET to an external power supply with an external resistor.
RESET goes low if FB drops below 92% of its set value. RESET goes high impedance 1.9ms after FB
rises above 95.5% of its set value. See the Electrical Characteristics table for threshold values.
3
RESET
PFM/PWM Mode-Selection Input. Connect MODE to GND to enable fixed-frequency PWM operation
at all loads. Leave MODE unconnected for PFM operation at light load.
4
5
MODE
OUT
Module Output Pin. Connect a capacitor from OUT to GND. See the PCB Layout Guidelines section for
more details.
Output Feedback Connection. Connect FB to a resistor-divider between OUT and GND to set the output
6
7
8
FB
voltage for MAXM15467. Connect to output voltage node (V
See Output-Voltage Setting section for more details.
) for MAXM15465 and MAXM15466.
OUT
V
Internal LDO Power Output. Bypass V
to GND with a minimum 1µF ceramic capacitor.
CC
CC
Active-High, Enable/Undervoltage-Detection Input. Pull EN/UVLO to GND to disable the module output.
EN/UVLO Connect EN/UVLO to V for always-on operation. Connect a resistor-divider between V , EN/UVLO,
IN
IN
and GND to program the input voltage at which the module turns on.
Power-Supply Input. Connect the V pins together. Decouple to GND with a capacitor;
IN
9–10
V
IN
place the capacitor close to the V and GND pins. See Table 1 for more details.
IN
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MAXM15465/MAXM15466/
MAXM15467
4.5V to 42V, 300mA Himalaya uSLIC
Step-Down Power Module
Functional Diagrams
Internal Diagram
MAXM15465/MAXM15466/
MAXM15467
V
V
IN
CC
LDO
HIGH-SIDE
DRIVER
EN/UVLO
LX
1.215V
33µH
LOW-SIDE
DRIVER
OUT
PEAK
CURRENT-MODE
CONTROLLER
OSCILLATOR
SOFT-START
GND
MODE
SELECTION
LOGIC
SLOPE
COMPENSATION
MODE
*S1
R3
RESET
*S2
RESET
LOGIC
FB
R4
*REFER TO TABLE A
Table A
MODULE PART NUMBER
MAXM15467
S1
S2
R3 (KΩ)
OPEN
R4 (KΩ)
CLOSE
OPEN
OPEN
OPEN
CLOSE
CLOSE
OPEN
77
MAXM15465
205.33
350.80
MAXM15466
77
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MAXM15465/MAXM15466/
MAXM15467
4.5V to 42V, 300mA Himalaya uSLIC
Step-Down Power Module
operation at all loads. However, PWM-mode of operation
gives lower efficiency at light loads compared to PFM-
mode of operation.
Detailed Description
The MAXM15465/MAXM15466/MAXM15467 are
a
family of high-efficiency, synchronous step-down DC-DC
modules with integrated controller, MOSFETs, compen-
sation components, and inductor that operate over a
wide input-voltage range. The modules deliver an output
current up to 300mA. The MAXM15465 and MAXM15466
are fixed 3.3V and 5V output modules respectively. The
MAXM15467 is an adjustable output (0.9V to 6.3V)
module. When EN/UVLO and V
an internal power-up sequence ramps up the error-amplifier
reference, resulting in an output-voltage soft-start.
PFM Operation
PFM mode operation disables negative output current
from the module, and skips pulses at light loads for bet-
ter efficiency. In PFM mode, the module output current
is forced to a fixed peak of 130mA 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 module output cur-
rent 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 130mA peak. The
advantage of PFM mode is higher efficiency at light loads
because of lower quiescent current drawn from supply.
UVLO are ascertained,
CC
The FB pin monitors the output voltage through a resistor-
divider. The RESET pin transitions to a high-impedance
state 1.9ms after the output voltage reaches 95.5% of
regulation. The devices select either PFM or forced-
PWM mode depending on the state of the MODE pin at
power-up. By pulling the EN/UVLO pin to low, the devices
enter shutdown mode and consumes only 2.2μA (typ) of
standby current.
The modules use an internally compensated, fixed-fre-
quency, current-mode control scheme. On the rising edge
of an internal clock, the high-side pMOSFET turns on.
An internal error amplifier compares the feedback volt-
age to a fixed internal reference voltage and generates
an error voltage. The error voltage is compared to a sum
of the current-sense voltage and a slope-compensation
voltage by a PWM comparator to set the on-time. During
the on-time of the pMOSFET, the inductor current ramps
up. For the remainder of the switching period (off-time),
the pMOSFET is kept off and the low-side nMOSFET
turns on. During the off-time, the inductor releases the
stored energy as the inductor current ramps down, pro-
viding current to the output. Under overload conditions,
the cycle-by-cycle current-limit feature limits the inductor
peak current by turning off the high-side pMOSFET and
turning on the low-side nMOSFET.
Internal 5V Regulator
An internal regulator provides a 5V nominal supply to power
the internal functions and to drive the power MOSFETs. The
output of the linear regulator (V ) should be bypassed
CC
with a 1μF ceramic capacitor to GND. The V
regula-
CC
tor dropout voltage is typically 150mV. An undervoltage
lockout circuit that disables the buck converter when V
CC
falls below 3.8V (typ). The 400mV, V -UVLO hysteresis
CC
prevents chattering on power-up and power-down.
Enable/Undervoltage Lockout (EN/UVLO),
Soft-Start
When EN/UVLO voltage is above 1.215V (typ), the
device’s internal error-amplifier reference voltage starts
to ramp up. The duration of the soft-start ramp is 3.75ms
(typ), allowing a smooth increase of the output voltage.
Driving EN/UVLO low disables both power MOSFETs, as
Mode Selection (MODE)
The logic state of the MODE pin is latched after V
CC
and EN/UVLO voltages exceed respective UVLO rising
thresholds and all internal voltages are ready to allow LX
switching. If the MODE pin is unconnected at power-up,
the part operates in PFM mode at light loads. If the MODE
pin is grounded at power-up, the part operates in con-
stant-frequency PWM mode at all loads. State changes
on the MODE pin are ignored during normal operation.
well as other internal circuitry, and reduces V quiescent
IN
current to below 2.2μA. EN/UVLO can be used as an
input-voltage UVLO adjustment input. An external voltage-
divider between V and EN/UVLO to GND adjusts the
IN
input voltage at which the device turns on or turns off.
If input UVLO programming is not desired, connect EN/
PWM Operation
In PWM mode, the module output current is allowed to
go negative. PWM operation is useful in frequency sensi-
tive applications and provides fixed switching frequency
UVLO to V (see the Electrical Characteristics table for
IN
EN/UVLO rising and falling threshold voltages).
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MAXM15465/MAXM15466/
MAXM15467
4.5V to 42V, 300mA Himalaya uSLIC
Step-Down Power Module
RESET Output (RESET)
Thermal Overload Protection
The devices include an open-drain RESET output to
monitor the output voltage. RESET goes high impedance
1.9ms after the output rises above 95.5% of its nominal
set value and pulls low when the output voltage falls
below 92% of the set nominal regulated voltage. RESET
asserts low during the hiccup timeout period.
Thermal overload protection limits the total power dis-
sipation in the device. When the junction temperature
exceeds +166°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.
Startup into a Prebiased Output
Applications Information
The devices are capable of soft-start into a prebiased out-
put, without discharging the output capacitor in both the
PFM and forced-PWM modes. Such a feature is useful in
applications where digital integrated circuits with multiple
rails are powered.
Input-Voltage Range
The minimum and maximum operating input voltages for
a given output voltage should be calculated as follows:
V
+ I
× 3.05
(
)
OUT
OUT
MAX
Overcurrent Protection (OCP)/Hiccup Mode
V
=
+ I
(
×1.8
OUT
)
IN(MIN)
D
The MAXM15465/MAXM15466/MAXM15467 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 FB node goes below 64.5% of its
nominal regulation threshold, the module enters hiccup
mode of operation. In hiccup mode, the module is protect-
ed by suspending switching for a hiccup timeout period
of 120ms (typ). Once the hiccup timeout period expires,
soft-start is attempted again. Hiccup mode of operation
ensures low power dissipation under output overload or
short-circuit conditions. Once the hiccup timeout period
expires, soft-start is attempted again.
V
OUT
V
=
IN(MAX)
t
× f
ON(MIN) SW
where:
V
I
= Steady-state output voltage,
= Maximum load current,
OUT
OUT
f
= Worst-case switching frequency(585000 Hz),
SW
D
= Maximum duty cycle (0.89),
MAX
t
= Worst-case minimum controllable switch on-
ON(MIN)
time (120ns).
The MAXM15465/6/7 are designed to support a maximum
load current of 300mA. The inductor ripple current is cal-
culated as follows:
Also, for duty cycle > 0.5;
V
> ((4.27 × V
) − 12.9)
IN(MIN)
OUT
For MAXM15465, V
For MAXM15466, V
= 5.5V, V
= 8.5V, V
= 42V
V
− V
− 4.85×I
V
+ 3.05×I
−1.8×I
OUT
IN(MIN)
IN(MAX)
IN
OUT
OUT
OUT
OUT
∆I =
×
L × f
V
= 42V
SW
IN
IN(MIN)
IN(MAX)
Where:
Selection of Input Capacitor
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’s switching.
V
V
= Steady-state output voltage
OUT
= Operating input voltage for given V
= Switching Frequency
IN
OUT
f
SW
The input capacitor RMS current requirement (I
defined by the following equation:
) is
RMS
L = Power module output inductance (33µH ±30%)
= Required output (load) current
I
OUT
V
× V − V
IN OUT
(
)
OUT
I
= I
×
OUT(MAX)
The following condition should be satisfied at the desired
load current, I
RMS
V
IN
.
OUT
where, I
is the maximum load current. I
has
RMS
OUT(MAX)
∆I
2
a maximum value when the input voltage equals twice the
I
+
< 0.49
OUT
output voltage (V = 2 x V
). So,
IN
OUT
I
OUT(MAX)
2
I
=
RMS(MAX)
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MAXM15465/MAXM15466/
MAXM15467
4.5V to 42V, 300mA Himalaya uSLIC
Step-Down Power Module
Choose an input capacitor that exhibits less than a +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:
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 GND
IN
(see Figure 1). Connect the center node of the divider to
EN/UVLO.
Choose R1 to be 3.3MΩ (max), and then calculate R2 as
I
×D
× 1− D
(
)
OUT(MAX)
f
MAX
MAX
follows:
C
=
IN
R1×1.215
R2 =
× ∆V
SW
IN
V
−1.215
INU
where:
where V
to turn on.
is the voltage at which the device is required
D
= Maximum duty cycle(0.89),
INU
MAX
f
= Switching frequency,
SW
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 and the EN/UVLO pin, to reduce voltage ringing on
the line.
∆V = Allowable input-voltage ripple.
IN
Selection of Output Capacitor
Small ceramic X7R-grade capacitors are sufficient and
recommended for output-voltage generation. 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 cur-
rent in the application, such that the output-voltage devia-
tion is less than 3%. Required output capacitance can be
calculated from the following equation:
Output-Voltage Setting
The MAXM15467 output voltage can be programmed
from 0.9V to 6.3V. Set the output voltage by connecting a
resistor-divider from output to FB to GND (see Figure 2).
Choose R4 less than or equal to 75kΩ and calculate R3
with the following equation:
V
OUT
R3 = R4×
−1
20
C
=
0.9
OUT
V
OUT
Connect FB of MAXM15465 and MAXM15466 directly to
for feedback control.
where C
is the output capacitance in μF and V
OUT
OUT
V
is the output voltage. Derating of ceramic capacitors with
DC-voltage must be considered while selecting the output
capacitor.
OUT
V
IN
OUT
MAXM15465
MAXM15466
MAXM15467
R1
R2
MAXM15467
R3
R4
FB
EN/UVLO
Figure 1. Adjustable EN/UVLO Network
Figure 2. Setting the Output Voltage
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MAXM15465/MAXM15466/
MAXM15467
4.5V to 42V, 300mA Himalaya uSLIC
Step-Down Power Module
Table 1. Selection of Components
PART
NUMBER
V
V
V
*
R3
(kΩ)
R4
(kΩ)
IN(MIN) IN(MAX) OUT
C
C
OUT
IN
(V)
(V)
(V)
1 x 1µF 0805 25V
(Murata GRM219R71E105KA88) (Murata GRM31CR70J226KE19L)
1 x 22µF 1206 6.3V
4.5
12.5
0.9
SHORT OPEN
1 x 1µF 0805 25V 1 x 22µF 1206 6.3V
(Murata GRM219R71E105KA88) (Murata GRM31CR70J226KE19L)
4.5
4.5
4.5
4.5
4.5
5.5
8.5
10
14
17
1
8.33
25
75
75
1 x 1µF 0805 25V 1 x 22µF 1206 6.3V
1.2
1.5
1.8
2.5
3.3
5
(Murata GRM219R71E105KA88) (Murata GRM31CR70J226KE19L)
1 x 1µF 0805 25V 1 x 10µF 1206 6.3V
21.5
25.5
36
50
75
(Murata GRM219R71E105KA88) (Murata GRM31CR70J106KA01)
1 x 1µF 0805 50V 1 x 10µF 1206 6.3V
MAXM15467
75
75
(Murata GRM21BR71H105KA12) (Murata GRM31CR70J106KA01)
1 x 1µF 0805 50V 1 x 10µF 0805 16V
133
200
348
450
N/A
N/A
75
(Murata GRM21BR71H105KA12) (Murata GRM21BZ71C106KE15)
1 x 1µF 0805 50V 1 x 10µF 0805 16V
42
75
(Murata GRM21BR71H105KA12) (Murata GRM21BZ71C106KE15)
1 x 1µF 0805 50V 1 x 10µF 0805 16V
42
75
(Murata GRM21BR71H105KA12) (Murata GRM21BZ71C106KE15)
1 x 1µF 0805 50V 1 x 10µF 0805 16V
60
6.3
3.3
5
75
(Murata GRM21BR71H105KA12) (Murata GRM21BZ71C106KE15)
1 x 1μF 0805 50V 1 x 10µF 0805 16V
MAXM15465
MAXM15466
5.5
8.5
42
N/A
N/A
(Murata GRM21BR71H105KA12) (Murata GRM21BZ71C106KE15)
1 x 1μF 0805 50V 1 x 10µF 0805 16V
(Murata GRM21BR71H105KA12) (Murata GRM21BZ71C106KE15)
42
* The modules have a pulse skip algorithm that allows V
to be regulated beyond the V
specified in the above table, up to 42V.
OUT
IN(MAX)
For the MAXM15465/MAXM15466/MAXM15467 evalu-
ation board, the thermal resistance from junction-to-
Power Dissipation
The power dissipation inside the module leads to
increase in the junction temperature of the MAXM15465/
MAXM15466/MAXM15467. The power loss inside the
module at full load can be estimated as follows:
ambient (θ ) is 41.56°C/W. Operating the module at
JA
junction temperatures greater than +125°C degrades
operating lifetimes. An EESIM model is available for the
MAXM15465/MAXM15466/MAXM15467 to simulate effi-
ciency and power loss for the desired operating conditions.
1
P
= P
×
−1
PCB Layout Guidelines
LOSS
OUT
η
Use the following guidelines for good PCB layout:
● Keep the input capacitors as close as possible to the
IN and GND pins.
Where η is the efficiency of the power module at the
desired operating conditions. The junction temperature
(T ) of the module can be estimated at any given maximum
ambient temperature (T ) from the following equation:
● Keep the output capacitors as close as possible to
J
the OUT and GND pins.
A
● Keep the resistive feedback dividers as close as
possible to the FB pin.
T = T + θ ×P
J
A
JA
LOSS
● Keep the power traces and load connections short.
Refer to the EV kit layout for first-pass success.
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MAXM15465/MAXM15466/
MAXM15467
4.5V to 42V, 300mA Himalaya uSLIC
Step-Down Power Module
V
V
IN
OUT
V
OUT
IN
C
C
OUT
IN
RESET
R3
R4
R1
R2
MAXM15467
EN/UVLO
FB
LX
V
CC
C
VCC
MODE
GND
CIN
V
IN
PLANE
GND PLANE
+
1
2
10
9
LX
V
V
IN
IN
MAXM15467
GND
R1
R2
EN/UVLO
VCC
8
7
3
4
RESET
MODE
OUT
5
6
C
VCC
FB
C
OUT
V
OUT
PLANE
GND PLANE
R3
R4
VIA TO INNER LAYER FOR ROUTING FB
Figure 3. Adjustable Output Layout Guidelines
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MAXM15465/MAXM15466/
MAXM15467
4.5V to 42V, 300mA Himalaya uSLIC
Step-Down Power Module
V
VOUT
IN
V
OUT
IN
C
C
OUT
IN
RESET
R1
R2
MAXM15465
MAXM15466
EN/UVLO
FB
LX
V
CC
C
VCC
MODE
GND
CIN
V
IN
PLANE
GND PLANE
+
1
2
10
9
LX
V
V
IN
IN
MAXM15465
MAXM15466
GND
RESET
MODE
OUT
R1
R2
EN/UVLO
VCC
8
7
3
4
5
6
C
VCC
FB
C
OUT
V
PLANE
OUT
GND PLANE
VIA TO INNER LAYER FOR ROUTING FB
Figure 4. Fixed Output Layout Guidelines
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MAXM15465/MAXM15466/
MAXM15467
4.5V to 42V, 300mA Himalaya uSLIC
Step-Down Power Module
Typical Application Circuits
Typical Application Circuit for Adjustable 3.3V Output
V
VOUT
IN
3.3V, 300mA
5.5V TO 24V
V
OUT
IN
C2
C1
1µF
10µF
R1
200kΩ
EN/UVLO
GND
MAXM15467
RESET
FB
R2
75kΩ
LX
V
CC
C3
1µF
MODE
MODE = GND FOR PWM
MODE = OPEN FOR PFM
C1 = MURATA 1μF/X7R/50V/0805 (GRM21BR71H105KA12L)
C2 = MURATA 10μF/X7R/16V/0805 (GRM21BZ71C106KE15)
C3 = MURATA 1μF/X7R/6.3V/0603 (GRM188R70J105K)
Typical Application Circuit for Adjustable 2.5V Output
V
VOUT
2.5V, 300mA
IN
5.5V TO 24V
V
OUT
GND
IN
C2
10µF
C1
1µF
R1
133kΩ
EN/UVLO
MAXM15467
RESET
FB
R2
75kΩ
LX
V
CC
C3
1µF
MODE
MODE = GND FOR PWM
MODE = OPEN FOR PFM
C1 = MURATA 1μF/X7R/50V/0805 (GRM21BR71H105KA12L)
C2 = MURATA 10μF/X7R/16V/0805 (GRM21BZ71C106KE15)
C3 = MURATA 1μF/X7R/6.3V/0603 (GRM188R70J105K)
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MAXM15465/MAXM15466/
MAXM15467
4.5V to 42V, 300mA Himalaya uSLIC
Step-Down Power Module
Typical Application Circuits (continued)
Typical Application Circuit for Adjustable 1.5V Output
V
VOUT
IN
1.5V, 300mA
4.5V TO 21.5V
V
OUT
IN
C2
10µF
C1
1µF
R1
50kΩ
EN/UVLO
GND
MAXM15467
RESET
FB
R2
75kΩ
LX
V
CC
C3
1µF
MODE
MODE = GND FOR PWM
MODE = OPEN FOR PFM
C1 = MURATA 1μF/X7R/25V/0805 (GRM219R71E105KA88D)
C2 = MURATA 10μF 1206 6.3V (GRM31CR70J106KA01)
C3 = MURATA 1μF/X7R/6.3V/0603 (GRM188R70J105K)
Typical Application Circuit for Fixed 3.3V Output
V
VOUT
3.3V, 300mA
IN
5.5V TO 42V
V
OUT
GND
IN
C2
10µF
C1
1µF
EN/UVLO
MAXM15465
RESET
FB
LX
V
CC
C3
1µF
MODE
MODE = GND FOR PWM
MODE = OPEN FOR PFM
C1 = MURATA 1μF/X7R/50V/0805 (GRM21BR71H105KA12L)
C2 = MURATA 10μF/X7R/16V/0805 (GRM21BZ71C106KE15)
C3 = MURATA 1μF/X7R/6.3V/0603 (GRM188R70J105K)
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MAXM15465/MAXM15466/
MAXM15467
4.5V to 42V, 300mA Himalaya uSLIC
Step-Down Power Module
Typical Application Circuits (continued)
Typical Application Circuit for Fixed 5V Output
V
VOUT
IN
5V, 300mA
8.5V TO 42V
V
OUT
IN
C2
C1
1µF
10µF
GND
EN/UVLO
MAXM15466
RESET
FB
LX
V
CC
C3
1µF
MODE
MODE = GND FOR PWM
MODE = OPEN FOR PFM
C1 = MURATA 1μF/X7R/50V/0805 (GRM21BR71H105KA12L)
C2 = MURATA 10μF/X7R/16V/0805 (GRM21BZ71C106KE15)
C3 = MURATA 1μF/X7R/6.3V/0603 (GRM188R70J105K)
Ordering Information
PART
NUMBER
TEMP
RANGE
PIN-PACKAGE
MAXM15465AMB+
-40°C to +125°C
10-pin uSLIC
10-pin uSLIC
10-pin uSLIC
10-pin uSLIC
10-pin uSLIC
10-pin uSLIC
MAXM15465AMB+T -40°C to +125°C
MAXM15466AMB+ -40°C to +125°C
MAXM15466AMB+T -40°C to +125°C
MAXM15467AMB+ -40°C to +125°C
MAXM15467AMB+T -40°C to +125°C
+ Denotes a lead(Pb)-free/RoHS-compliant package.
T Denotes tape-and-reel.
Maxim Integrated
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MAXM15465/MAXM15466/
MAXM15467
4.5V to 42V, 300mA Himalaya uSLIC
Step-Down Power Module
Revision History
REVISION REVISION
PAGES
CHANGED
DESCRIPTION
NUMBER
DATE
0
12/18
Initial release
—
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.
2018 Maxim Integrated Products, Inc.
│ 26
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