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MAX77504
14V Input, 3A High-Efficiency
Buck Converter in WLP or QFN
General Description
Benefits and Features
The MAX77504 is a synchronous 3A step-down DC-DC
converter optimized for portable 2-cell and 3-cell battery-
operated applications. The converter operates on an input
supply between 2.6V and 14V. Output voltage is ad-
justable between 0.6V and 6V with external feedback re-
● 3A Single-Channel Buck Regulator
● 2.6V to 14V Input Voltage
● 0.6V to 6V Output Voltage Range
● 0.5MHz to 1.5MHz Fixed-Frequency Switching
Options
sistors. The device features a low-I SKIP mode that al-
● High Efficiency, Low I Extends Battery Life
Q
Q
lows excellent efficiency at light loads. The MAX77504
can be sychronized by driving the FPWM pin with an ex-
ternal clock.
• 94% Peak Efficiency at 7.4V , 3.3V
IN
(2520
OUT
Inductor)
• 10μA I
(12V , 1.8V
)
OUT
SUP
IN
Dedicated enable, power-OK, and FPWM pins allow sim-
ple hardware control. The SEL input easily configures
switching frequency, gain, and output active discharge op-
tion. Built-in undervoltage lockout (UVLO), output active
discharge, cycle-by-cycle inductor current limit, thermal
shutdown, and short-circuit protection ensure safe opera-
tion under abnormal operating conditions.
• OUT Powers V Automatically (V
> 1.7V) for
OUT
L
Low I
Q
● Enable Pin (EN) for Direct Hardware Control
● Extenal Clock Synchronization Is Available Through
the FPWM/SYNC Pin
● Power-OK Output (POK) Monitors V
Ordering Information)
Quality (See
OUT
The MAX77504 is offered in a small 1.7mm x 1.7mm,
16-bump, 0.4mm pitch wafer-level package (WLP) or a
2.5mm x 2.5mm, 12-lead, 0.5mm pitch flip-chip QFN
(FC2QFN).
● Protection Features
• Cycle-by-Cycle Inductor Current Limit
• Short-Circuit Hiccup Mode, UVLO, and Thermal
Shutdown Protection
• Soft-Start
Applications
● FC2QFN or WLP Package Option
• 2.5mm x 2.5mm (0.6mm max. height) 12-Lead
FC2QFN, 0.5mm Pitch
● 1- to 3-Cell Li+/Li-ion Battery-Powered Devices
● Professional Radio, Handheld Computers
● Mirrorless Cameras, DSLR, and Notebook Computers
● Portable Scanners, POS Terminals, Printers
● Space-Constrained Portable Electronics
• 1.7mm x 1.7mm (0.7mm max. height) 16-Bump
WLP, 0.4mm Pitch, 4 x 4 Array
● All WLP Package Bumps (Except POK) Routeable on
a Non-HDI PCB
Ordering Information appears at end of data sheet.
Simplified Application Circuit
EFFICIENCY vs. LOAD
7.4V SUPPLY
100
MAX77504
2.6V TO 14V
DC INPUT
BST
SUP
0.22μF
10μF
L
90
LX
V
OUT
80
70
60
50
40
30
20
10
0
0.6V TO 6V
3A MAX
OUT
C
C
OUT
FF
ENABLE
EN
R
R
TOP
BOT
VOUT = 5.0V
VOUT = 3.3V
FPWM/SYNC
POWER-OK
FPWM
POK
SEL
FB
VOUT = 1.8V
R
SEL
V
L
2.2μF
AGND
PGND
R
SEL
CONTROLS:
● SWITCHING FREQ.
● ACTIVE DISCHARGE
● GAIN
SKIP MODE
1
0.001
0.01
0.1
14V, 3A HIGH-EFFICIENCY BUCK CONVERTER
OPTIMIZED FOR 2 OR 3 CELL BATTERY APPLICATIONS
LOAD CURRENT (A)
19-100678; Rev 2; 7/20