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MAX77541
5.5V /6A, Dual-Phase High-Efficiency Buck
IN
Converter
General Description
Benefits and Features
The MAX77541 is a high-efficiency step-down converter
with two 3A switching phases for single-cell Li+ battery
● 2.2V to 5.5V Input Voltage Range
● 0.3V to 5.2V Output Voltage Range
● Two 3A Bucks (1Φ) or One 6A Buck (2Φ)
and 5V
systems. It uses an adaptive COT (constant
DC
on-time) current-mode control architecture and the two 3A
switching phases can be configured as either one (2Φ, 6A)
or two (1Φ, 3A each) outputs. The output voltages are pre-
● ±0.5% V
● 91% Peak Efficiency (3.8V , 1.1V
Accuracy (Default V
at 25°C)
, 1.6MHz)
OUT
OUT
OUT
IN
● Auto SKIP/PWM Transition and Low-Power Mode
● Drop-Out Operation with 98% of Max. Duty Cycle
● Programmable Soft-Start/Soft-Stop and Ramp-up/
Ramp-down Slew-rates
● Prebiased Startup and Active Output Discharge
● Programmable Inductor Peak Current Limits for
Solution Size Optimization
● 0.5/1.0/1.6MHz Nominal Switching Frequency
● Spread-Spectrum Modulation for EMI Reduction
● Internal/External Frequency Tracking
2
set with resistors and are further adjustable through an I C
compatible interface. With 91% peak efficiency, low quies-
cent current, and compact solution size, the MAX77541 is
ideal for battery powered, space-constraint equipment.
Programmable switching frequency, frequency tracking,
and spread-spectrum allow easier system optimization for
noise-sensitive applications. Dedicated EN, POK, and FP-
WM pins provide options for direct hardware control, while
more programmable options such as soft-start/stop and
● Default V
and Phase Configuration Setting by
and R
SEL2
2
OUT
ramp-up/down slew-rates are available through I C. An ar-
R
SEL1
2
ray of built-in protections ensures safe operation under ab-
normal operating conditions.
● I C Slave ADDR, ILIM, and F
Preset by R
SW
CFG
● Dedicated ENx, POKx and FPWMx for each Buck
● UVLO, Thermal Shutdown, and Short-circuit
Protection
● High-Speed I C Serial I/F
● Available in 30-WLP (2.51mm x 2.31mm x 0.7mm)
and 24-FC2QFN (3mm x 3mm) Packages
Applications
● Single-Cell Li+ and 5V
Systems
2
DC
● Gaming Consoles and VR/AR Headsets
● Microprocessors, FPGAs, DSPs, and ASICs
● Network Switches and Routers
2
● Less than 55mm Total Solution Size with 2520
Inductors
Typical Applications Circuit
DC POWER SOURCE
SYS
DC POWER SOURCE
(2.2V TO 5.5V)
IN1
(2.2V TO 5.5V)
V
V
L
BST1
3A
3A
1Φ
+
V
IO
DD
LX1
PGND1
V
(0.3V TO 5.2V)
OUT1
MAX77541
MULTI-PHASE
BUCK
1Φ
IRQB
SCL
SDA
I2C_EN
EN1
SNS1
IN2
DC POWER SOURCE
(2.2V TO 5.5V)
PHASE-CONFIGURABLE
(SINGLE OR DUAL-OUTPUT)
BST2
EN2
LX2
V
(0.3V TO 5.2V)
OUT2
CFG
SEL1
SEL2
AGND
NC
PGND2
SNS2
POK1
POK2
FPWM1
FPWM2
2Φ
6A
1+1
CONFIGURATION
19-101174; Rev 1; 5/22
Ordering Information appears at end of data sheet.
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