MAX20073ATBBV [MAXIM]
Single 2A/3A 2.2MHz Low-Voltage Step-Down DC-DC Converters;
| 型号： | MAX20073ATBBV |
| 厂家： | 
MAXIM INTEGRATED PRODUCTS |
| 描述： | Single 2A/3A 2.2MHz Low-Voltage Step-Down DC-DC Converters |
| 文件： | 总12页 (文件大小：595K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
EVALUATION KIT AVAILABLE
MAX20073/MAX20074
Single 2A/3A 2.2MHz Low-Voltage
Step-Down DC-DC Converters
General Description
Benefits and Features
● High-Feature Set in Ultra-Small Footprint
The MAX20073/MAX20074 high-efficiency switching
regulator family delivers up to 3A load current from 0.5V to
3.8V. The devices operate from an input voltage range of
2.7V to 5.5V, making them ideal for on-board point-of-load
and post-regulation applications. Total output error is less
than ±1.5% over load, line, and temperature.
• High-Efficiency DC-DC Converter
• Up to 3A Output Current
• 2.7V to 5.5V Operating Supply Voltage
• Resistor-Adjustable or Factory-Preset
Output Voltage
• Synchronizable, 2.2MHz Switching-Frequency
Enable Input
• RESET Output
The devices feature fixed-frequency PWM mode of opera-
tion, with a 2.2MHz switching frequency. High-frequency
operation enables an all-ceramic capacitor design and
small external components.
• Spread-Spectrum Enable Input
• Forced-PWM and Skip Modes
• Current-Mode Architecture
• 3mm x 3mm x 0.85mm 10-Pin TDFN
● High Precision
The low-resistance on-chip switches ensure high efficiency
at heavy loads while minimizing critical inductances,
making the layout a much simpler task with respect to
discrete solutions. Following a simple layout and footprint
ensures first-pass success in new designs.
• 107% Overvoltage Monitor
• 93% Undervoltage Monitor
• ±1.5% Output-Voltage Accuracy
• Excellent Load Transient Performance
• Overtemperature and Short-Circuit Protection
• -40°C to +125°C Operating Temperature Range
The devices provide an enable input, spread-spectrum
enable input, and RESET output. The output voltage can
be preset at the factory to allow customers to achieve
±1.5% output-voltage accuracy without using expensive
0.1% external resistors. In addition, the output voltage
can be set to any customer value by using two external
resistors at the feedback with 0.5V internal reference. The
device offers a fixed 0.85ms soft-start time.
The 10-pin TDFN exposed pad devices include
overtemperature shutdown and overcurrent limiting. All
devices are designed to operate over the -40°C to +125°C
ambient temperature range.
Ordering Information appears at end of data sheet.
Typical Operating Circuit
Applications
● Automotive
V
PV
PV
1µH
4.7µF
PV
3.3V
EN
PGND
LX
● Point-of-Load
V
MAX20073
MAX20074
56.2kΩ
10Ω
10pF
22µF
AV
OUT
1µF
10kΩ
GND
V
PV
20KΩ
SYNC
SSEN
RESET
EP
19-8556; Rev 1; 7/18
MAX20073/MAX20074
Single 2A/3A 2.2MHz Low-Voltage
Step-Down DC-DC Converters
Absolute Maximum Ratings
PV to PGND............................................................-0.3V to +6V
AV to GND...............................................................-0.3V to +6V
RESET, OUT to GND..............................................-0.3V to +6V
SYNC, EN, SSEN to GND .............................-0.3V to PV +0.3V
GND to PGND......................................................-0.3V to +0.3V
LX Continuous RMS Current ..................................................4A
LX to PGND (Note 1) ....................................-0.3V to PV + 0.3V
Output Short-Circuit Duration....................................Continuous
Continuous Power Dissipation (T = +70°C)
A
10-pin TDFN-EP (derate 24.4mW/°C > 70°C).......... 1951mW
Operating Temperature Range......................... -40°C to +125°C
Junction Temperature......................................................+150°C
Storage Temperature Range............................ -40°C to +150°C
Lead Temperature Range................................................+300°C
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.
(Note 2)
Package Thermal Characteristics
Junction-to-Ambient Thermal Resistance (θ ) ..............41°C/W
JA
Junction-to-Case Thermal Resistance (θ ).....................9°C/W
JC
Note 1: Self-protected from transient voltages exceeding these limits in circuit under normal operation.
Note 2: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer
board. For detailed information on package thermal considerations, refer to www.maximintegrated.com/thermal-tutorial.
Electrical Characteristics
(V = V = 5.0V, V
= 5.0V, V
= 0V, . T = T = -40°C to +125°C, unless otherwise noted. Typical values are at T = +25°C
AV
PV
EN
SSEN A J A
under normal conditions, unless otherwise noted.) (Note 3)
PARAMETER
Supply Voltage Range
Supply Current
SYMBOL
CONDITIONS
MIN
TYP
MAX
5.5
UNIT
V
V
2.7
IN
I
V
V
= 0V
3
10
µA
µA
V
SHDN
EN
Supply Current
I
= 5V, V
= 0V, no load
40
93
IN
EN
SYNC
V
Rising
Falling
2.3
2.2
2.0
1.8
2.5
2.4
2.2
2.65
2.55
2.4
UVLOR
Undervoltage Lockout
V
V
UVLOF
Oscillator Frequency
f
MHz
MHz
%
SW
SYNC Input Frequency Range
Spread-Spectrum Range
f
2.6
SYNC
SS
V
= V
±3
SSEN
AV
0.04 x
0.12 x
0.20 x
I
LIM
Skip Mode Peak Current
Voltage Accuracy
I
mA
%
SKIP
I
I
LIM
LIM
PWM mode, 0A ≤ I
≤ I
MAX
LOAD
V
-1.5
+1.5
OUT
2.7V ≤ V = V ≤ 5.5V
AV
PV
OUT Bias Current
I
Adjustable mode
Fixed mode
-500
4
15
5
+500
6
nA
µA
OUT_ADJ
OUT Bias Current
I
OUT_FIX
DC Load Regulation
DC Line Regulation
pMOS On-Resistance
nMOS On-Resistance
L
0A ≤ I
≤ I (PWM Mode)
MAX
0.02
0.05
60
%/A
%/V
mΩ
mΩ
D_REG
N_REG
LOAD
L
2.7V ≤ V = V ≤ 5.5V
AV
PV
R
V
= V = 5V, I = 0.1A
30
20
120
80
HS
PV
PV
AV
LX
R
V
= V = 5V, I = 0.1A
38
LS
AV
LX
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MAX20073/MAX20074
Single 2A/3A 2.2MHz Low-Voltage
Step-Down DC-DC Converters
Electrical Characteristics (continued)
(V = V = 5.0V, V
= 5.0V, V
= 0V, . T = T = -40°C to +125°C, unless otherwise noted. Typical values are at T = +25°C
AV
PV
EN
SSEN A J A
under normal conditions, unless otherwise noted.) (Note 3)
PARAMETER
SYMBOL
CONDITIONS
MAX20073 (2.0A DC)
MAX20074 (3.0A DC)
MIN
3.0
TYP
3.8
MAX
UNIT
A
Current-Limit Threshold
I
LIM
4.5
5.8
A
nMOS Zero-Crossing Threshold
Soft-Start Ramp Time
I
130
0.8
mA
ms
%
ZX
t
SS
Maximum Duty Cycle
DC
100
70
MAX
Minimum On-Time
t
25
20
40
40
ns
Ω
MINTON
OUT_ Discharge Resistance
RESET OUTPUT (RESET)
Overvoltage Threshold (Rising)
Undervoltage Threshold (Falling)
R
V
= 0V
80
DISCH
EN
OUT
OUT
Rising, % of nominal output
Falling, % of nominal output
104
90
107
93
110
96
%
%
OV_R
UV_F
Overvoltage-Protection
Threshold (Rising)
OUT
OUT
Rising, % of nominal output
Falling, % of nominal output
120
118
129
%
%
OVP_R
Overvoltage-Protection
Threshold (Falling)
OVP_F
Active Timeout Period
Output Low Level
t
7.4
0.1
ms
V
HOLD
V
I
= 3mA
SINK
0.2
ROL
RESET Leakage Current
Undervoltage-Propagation Time
Overvoltage-Propagation Time
Thermal-Shutdown Temperature
Thermal-Shutdown Hysteresis
ENABLE INPUTS (EN, SSEN)
Input High
I
-500
+500
nA
µs
µs
ºC
ºC
OZ
t
OUT less than 20% below target
5
55
UVDEL
t
OUT greater than 20% above target
OVDEL
T
T rising
+170
15
SHDN
J
T
HYST
V
2.7V ≤ V = V ≤ 5.5V
1.5
V
V
IHEN
AV
PV
Input Low
V
2.7V ≤ V = V ≤ 5.5V
0.5
ILEN
AV
PV
Hysteresis
V
0.175
0.5
V
HYSTEN
EN Pulldown Current
SSEN Pulldown Current
SYNCHRONIZATION (SYNC)
Input High
I
0.20
0.1
1.6
0.8
µA
µA
ENPD
I
0.25
SSENPD
V
2.7V ≤ V = V ≤ 5.5V
1.5
50
V
V
IH_SYNC
AV
PV
Input Low
V
2.7V ≤ V = V ≤ 5.5V
0.5
150
0.4
IL_SYNC
SYNCPD
AV
PV
Pulldown Resistance
Output Low
R
100
kΩ
V
V
SYNC output option, I
SYNC output option, I
= -3mA
= 3mA
SOL
SYNC
SYNC
Output High
V
4.2
V
SOH
Note 3: All units are 100% production tested at +25˚C. All temperature limits are guaranteed by design.
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MAX20073/MAX20074
Single 2A/3A 2.2MHz Low-Voltage
Step-Down DC-DC Converters
Typical Operating Characteristics
(V = V = 5.0V, T = +25°C, unless otherwise noted.)
AV
PV
A
QUIESCENT CURRENT vs. TEMPERATURE
NORMAL OPERATION
GAIN/PHASE vs. FREQUENCY
1.8V OUTPUT (ADJUSTABLE)
toc01
toc02
60
50
40
30
20
10
0
180
150
120
90
OUTPUT ENABLED,
NO LOAD, 0.5VOUT
____ GAIN
_ _ _ PHASE
60
30
____ 5.0VIN
_ _ _ 3.3VIN
0
-30
-50
0
50
100
150
0.01
0.1
1
10
100
1000
FREQUENCY (kHz)
TEMPERATURE (°C)
EFFICIENCY vs. OUTPUT CURRENT
3.3V INPUT (MAX20074)
EFFICIENCY vs. OUTPUT CURRENT
toc03
toc04
100
90
80
70
60
50
40
30
20
10
0
100
90
80
70
60
50
40
30
20
10
0
SKIP
SKIP
FPWM
FPWM
0.001
____ 3.3VOUT
_ _ _ 1.8VOUT
____ 1.8VOUT
_ _ _ 1.2VOUT
0.0001
0.001
0.01
0.1
1
0.0001
0.01
0.1
1
OUTPUT CURRENT (A)
OUTPUT CURRENT (A)
LOAD TRANSIENT RESPONSE
20% -80% - 20%
STARTUP BEHAVIOR
NO LOAD
10µs RISE/FALL
toc05
toc06
250mV/div
50mV/div
(1.8V offset)
VOUT
VOUT
5V/div
5V/div
500mA/div
VEN
IOUT
VRESET
1ms/div
20µs/div
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MAX20073/MAX20074
Single 2A/3A 2.2MHz Low-Voltage
Step-Down DC-DC Converters
Pin Configuration
TOP VIEW
RESET
1
2
3
4
5
10 EN
9
8
7
6
OUT
PV
SSEN
AV
MAX20073
MAX20074
GND
SYNC
LX
EP
PGND
TDFN-EP
(3mm x 3mm)
Pin Description
PIN
NAME
FUNCTION
1
RESET Active-Low Open-Drain RESET Output. External pullup resistor required if used.
2
SSEN
AV
Spread-Spectrum Enable. Drive SSEN high for spread-spectrum operation.
Analog Voltage Supply. Connect a 0.1μF ceramic capacitor from AV to GND. Connect AV to PV with a 10Ω
resistor.
3
4
GND
Analog Ground
SYNC I/O. When configured as an input, connect SYNC to GND or leave unconnected to enable skip mode
operation under light loads. Connect SYNC to AV or an external clock to enable fixed-frequency FPWM
mode operation. When configured as an output, connect SYNC to other device’s SYNC inputs.
5
SYNC
6
7
8
PGND Power Ground
LX
PV
Inductor Connection. Connect LX to the switched side of the inductor.
Power Input-Voltage Supply. Connect a 4.7μF or larger ceramic capacitor from PV to PGND.
Feedback Input. Connect an external resistive divider from the converter’s output to OUT and GND to set
the output voltage. Connect to the output capacitor when configured as a fixed-output device.
9
OUT
EN
Active-High Enable Input. Drive EN high for normal operation. On the rising edge, the device enters soft-
start; on the falling edge, the device turns off.
10
—
Exposed pad. Internally connected to GND. Connect to a large ground plane to maximize thermal
performance. Not intended as an electrical connection point.
EP
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MAX20073/MAX20074
Single 2A/3A 2.2MHz Low-Voltage
Step-Down DC-DC Converters
Internal Block Diagram
CURRENT-SENSE
AMP
PV
SKIP CURRENT
COMP
PV
CLK
PEAK CURRENT
COMP
RAMP
GENERATOR
PGND
PV
LX
CONTROL LOGIC
∑
PWM
COMP
V
REF
PGND
SOFT-START
GENERATOR
ERROR
AMP
FPWM CLK
PGOOD
COMP
CURRENT LIM
COMP
PGND
GND
POK
FEEDBACK
SELECT
OUT
V
REF
CLK
SYNC
SSEN
OTP
TRIMBITS
V
OSC
POK
AV
FPWM
VOLTAGE
REFERENCE
UVLO
V
REF
AV
RESET
MAIN
CONTROL
LOGIC
EN
PGND
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MAX20073/MAX20074
Single 2A/3A 2.2MHz Low-Voltage
Step-Down DC-DC Converters
Spread-Spectrum Oscillator
Detailed Description
The devices have a spread-spectrum oscillator option
that varies the internal operating frequency up by
±3% relative to the internally generated 2.2MHz (typ)
operating frequency. This function does not apply to exter-
nally applied oscillation frequency. The spread frequency
generated is pseudorandom. Connect the SSEN pin to
PV to enable the spread-spectrum oscillator or to ground
to disable the spread-spectrum oscillator.
The MAX20073/MAX20074 high-efficiency switching
regulator family delivers up to a 3A load current from 0.5V
to 3.8V. The devices operate from 2.7V to 5.5V, making
them ideal for on-board point-of-load and post-regulation
applications. Total output error is less than ±1.5% over
load, line, and temperature.
The devices feature fixed-frequency PWM mode opera-
tion with a 2.2MHz switching frequency. High-frequency
operation allows for an all-ceramic capacitor design.
The high operating frequency also allows for small-size
external components.
Synchronization (SYNC)
The devices have an on-chip oscillator that provides a
2.2MHz (typ) switching frequency. Depending on the
condition of the SYNC pin, two operation modes exist. If
SYNC is unconnected or at GND, and if the load current
is below the skip mode current threshold, the device oper-
ates in a highly efficient pulse-skipping mode. If SYNC
is at PV or has a frequency applied to it, the device is in
forced-PWM (FPWM) mode. The device can be switched
during operation between FPWM mode and skip mode by
switching SYNC.
The low-resistance on-chip switches ensure high efficiency
at heavy loads while minimizing critical inductances,
making the layout a much simpler task with respect to
discrete solutions. Following a simple layout and footprint
ensures first-pass success in new designs.
The devices provide an enable input (EN) and a reset
output (RESET). The output voltage can be preset at the
factory, allowing customers to achieve ±1.5% output-
voltage accuracy without using expensive 0.1% resistors.
In addition, the output voltage can be set to any customer
value by either using two external resistors at the feed-
back with 0.5V internal reference. The devices offer a
fixed 0.85ms soft-start time.
The SYNC pin can be used as an input or an output (see
Pin Description). SYNC-pin mode is factory configurable.
When configured as an output, the clock will be 180° out-
of-phase from the internal clock. The devices always
operate in PWM mode when SYNC is configured as an
output.
Enable Input (EN)
Soft-Start
The enable (EN) control input activates the device from
a low-power shutdown state. EN has an input threshold
of 1.15V (typ) with hysteresis of 175mV (typ). When the
enable input goes high, the associated output voltage
ramps up with the soft-start time.
The devices include a fixed soft-start of 0.80ms. Soft-start
time limits startup inrush current by forcing the output volt-
age to ramp up towards its regulation point.
Current Limit/Short-Circuit Protection
Reset Output (RESET)
The devices feature current limit that protects against short-
circuit and overload conditions at the output. In the event of
a short-circuit or overload condition, the high-side MOSFET
remains on until the inductor current reaches the high-side
MOSFET’s current-limit threshold. The converter then turns
on the low-side MOSFET to allow the inductor current to
ramp down. Once the inductor current crosses below the
low-side MOSFET’s current-limit threshold, the converter
turns on the high-side MOSFET again. This cycle repeats
until the short or overload condition is removed.
The devices feature an open-drain reset output pin
(RESET) that asserts low when the output voltage is
outside of the undervoltage/overvoltage window. The
RESET pin remains asserted low for a fixed timeout
period after the output rises up to its regulated voltage. A
fixed hold period of 7.4ms is applied after the output is in
regulation. To obtain a logic signal, place a resistor pullup
between the RESET pin to the system input/output (I/O)
voltage. The pullup resistance should normally be ≥ 2kΩ
to ensure that the device can pull down to the specified
voltage level.
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MAX20073/MAX20074
Single 2A/3A 2.2MHz Low-Voltage
Step-Down DC-DC Converters
Equation 1:
PWM and Skip Modes
The devices feature a SYNC input that puts the converter
either in skip mode or FPWM mode of operation (see the
Pin Description section for mode details). In FPWM mode,
the converter switches at a constant frequency with
variable on-time. In skip mode, the converter’s switching
frequency is load-dependent until the output load reaches
a certain threshold. At higher load currents, the switch-
ing frequency does not change and the operating mode
is similar to the PWM mode. Skip mode helps improve
efficiency in light-load applications by allowing the con-
verter to turn on the high-side switch only when the output
voltage falls below a set threshold. As such, the converter
does not switch MOSFETs on and off as often as in PWM
mode. Consequently, the gate charge and switching
losses are much lower in skip mode.
(V − V
)× V
OUT
IN
OUT
×I
L
=
MIN
V
× f
× 30%
IN SW MAX
where:
● R
= 0.263Ω for 2A channel and
0.176Ω for 3A channel
CS
● I = 3A or 2A depending on part number. Use the
MAX
maximum output capability of the output channel for
the part number in use.
● f
= The operating frequency. This value is 2.2MHz
unless externally synchronized to a different
frequency.
SW
Equation 2 ensures that the inductor current downslope
is less than twice the internal slope compensation. This
is a minimum requirement for stability and requires that
Equation 2 is satisfied.
Overtemperature Protection
Thermal-overload protection limits the total power
dissipation in the device. When the junction temperature
exceeds 170°C (typ), an internal thermal sensor shuts
down the internal bias regulator and the step-down
controller, allowing the device to cool. The thermal sensor
turns on the device again after the junction temperature
cools by 15°C.
Equation 2:
m 2
−m ≥
2
where:
● m = Inductor current downslope:
2
Applications Information
V
OUT
L
×R
Input Capacitors
CS
The input filter capacitor reduces peak currents drawn
from the power source and reduces noise and voltage
ripple on the input caused by the circuit’s switching. A
4.7µF ceramic capacitor is recommended for the PV pin.
A 0.1µF ceramic capacitor is recommended for the AV pin,
with a series 10Ω resistor to the supply.
● -m = Adjustable versions and fixed output
voltages ≤ 3.2V, slope compensation:
0.535V / µs
[
]
● Fixed-output versions and output voltages > 3.2V,
Inductor Selection
slope compensation:
Three key inductor parameters must be specified for
operation with the device: inductance value (L), inductor
0.94V / µs
saturation current (I
), and DC resistance (R
SAT
). Use
DCR
Equation 1 to determine the minimum inductor value.
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MAX20073/MAX20074
Single 2A/3A 2.2MHz Low-Voltage
Step-Down DC-DC Converters
Solving for L and adding a 1.3 multiplier to account for
tolerances in the system is shown in Equation 3.
● I
= The maximum DC current capability.
MAX
I
= 2A (MAX20073)
= 3A (MAX20074)
MAX
MAX
Equation 3:
I
● V
= Nominal output voltage.
OUT
R
CS
L
= V
×
OUT
×1.3
MIN2
2×m
Adjustable Output-Voltage Option
The devices’ adjustable output-voltage version allows the
customer to set the outputs to any voltage between 0.5V
and approximately PV - 0.5V (see Ordering Information).
The actual maximum output-voltage setting will be limited
by the specific application conditions and components.
Connect a resistive divider from the output capacitor
where:
● L
= The larger of L
and L
must be used:
MIN
MIN1
MIN2
L
MIN
= max(L
, L
)
MIN1 MIN2
● The maximum inductor value recommended is 2
times the chosen value from the above formula.
(V
) to OUT to GND to set the output voltage (Figure
OUT
1). Select R (OUT to GND resistor) ≤ 100kΩ. Calculate
L
= 2 x L
MIN
2
MAX
R (V
to OUT resistor) with the Equation 5.
1
OUT
● The nominal inductor value is selected using:
< L < L
Equation 5:
L
MIN
NOM
MAX
V
OUT
R = R
−1
2
1
V
Output Capacitor
FB
The devices are designed to be stable with low-ESR
ceramic capacitors. Other capacitor types are not
recommended as the ESR zero can affect stability of the
device. The output capacitor calculations in Equation 4
are guidelines based on nominal conditions. The phase
margin must be measured on the final circuit to verify
proper stability is achieved.
where V
table).
= 500mV (see the Electrical Characteristics
FB
The external feedback resistive divider must be frequency
compensated for proper operation. Place a capacitor
across R in the resistive divider network. Use Equation 6
1
to determine the value of the capacitor.
Equation 6:
Equation 4:
R
R
2
1
I
MAX
C = 50
pF
1
C
= 10.5µs ×
OUT_MIN
V
OUT
I
MAX
C
C
= 27.5µs ×
OUT_NOM
OUT_MAX
V
OUT
V
OUT
= 3 × C
OUT_NOM
● C
= The minimum fully derated output
OUT_MIN
R
C
1
1
capacitance needed for a stable output.
OUT
● C
= The nominal output capacitance. This
OUT_NOM
capacitance value normally provides the highest
stability.
R
2
● C
= The maximum recommended output
OUT_MAX
capacitance. Increased capacitance beyond this
value is not recommended without measuring the
phase margin to ensure acceptable stability. While
the device does not become unstable with large
output capacitance, the phase margin does degrade.
Figure 1. Adjustable Output-Voltage Configuration
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MAX20073/MAX20074
Single 2A/3A 2.2MHz Low-Voltage
Step-Down DC-DC Converters
● The layer directly below the IC and DC-DC
components should be a solid ground plane.
Connect the GND and PGND pins of the device
and components together with a low-impedance
connection and add several vias to ground near those
pins. Do not split the ground plane at or near the
circuit. See Figure 2 for an example layout of the IC
and DC-DC components.
PCB Layout Guidelines
The following guidelines should be followed to obtain the
vbest performance from the device:
● Place several vias in the exposed pad (EP) and
connect them all to ground layers below the part. EP
is attached to the die with epoxy, making it a good
method for transferring heat out of the IC. An array of
0.3mm-diameter vias is recommended.
● Place all DC-DC components on the same layer
as the IC, and locatet hem as close to the IC as
possible.Route the traces in a tight loop. Trace length
should be prioritized over trace thickness, and a
shorter trace is preferable. This decreases the loop
area of the circuit, minimizing EMI and jitter.
RESET
SSEN
EN
OUT
Route OUT underneath solid ground layer
AV
PV
EP
GND
LX
SYNC
PGND
Figure 2. Example Layout of IC and DC-DC Components
Maxim Integrated
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MAX20073/MAX20074
Single 2A/3A 2.2MHz Low-Voltage
Step-Down DC-DC Converters
Ordering Information
Package Information
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.
V
(V)
I
OUT
OUT
(A)
PART
PIN-PACKAGE
MAX20073ATBA/V+
MAX20073ATBB/V+
MAX20074ATBA/V+
Adjustable
3.3
2
2
3
10 TDFN-EP*
10 TDFN-EP*
10 TDFN-EP*
PACKAGE
TYPE
PACKAGE
CODE
OUTLINE
NO.
LAND
PATTERN NO.
Adjustable
For variants with different options, contact factory.
10 TDFN-EP*
T1033+1C
21-0137
90-0003
/V denotes an automotive qualified part.
+Denotes a lead(Pb)-free/RoHS-compliant package.
*EP = Exposed pad.
Maxim Integrated
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MAX20073/MAX20074
Single 2A/3A 2.2MHz Low-Voltage
Step-Down DC-DC Converters
Revision History
REVISION REVISION
PAGES
CHANGED
DESCRIPTION
NUMBER
DATE
0
9/16
Initial release
—
Updated Typical Application Circuit, Absolute Maximum Ratings, Pin Description,
Internal Block Diagram, Synchronization (SYNC), Input Capacitors, Induction
Selection, Figure 1, and added PCB Layout Guidelines and Figure 2
1
1,2, 5–10
7/18
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim Integrated’s website at www.maximintegrated.com.
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.
2016 Maxim Integrated Products, Inc.
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