EVALUATION KIT AVAILABLE
MAX77812
Quad-Phase, 20A Max, Configurable
Buck Regulator
General Description
Benefits and Features
● 20A Maximum Output Current
● 2.5V to 5.5V Input Voltage Range
The MAX77812 is a quad-phase, high-current, buck
regulator for multicore applications processors in the lat-
est smart phones and tablets. The MAX77812 achieves
world-class transient response with miniature PCB foot-
print through the use of small inductors and output capaci-
tors. Differential remote sense feedback enables tight DC
and AC accuracy at the point of load. The MAX77812’s
flexible architecture allows user-selectable phase configu-
rations such as 4, 3 + 1, 2 + 2, 2 + 1 + 1, and 1 + 1 + 1 + 1.
● Output Voltage Range from 0.25V to 1.525V in 5mV
Steps
● ±0.5% Typical DC Output Voltage Accuracy
● 90% Peak Efficiency at 3.8V , 1.1V
,
IN
OUT
L = 220nH (13mΩ DCR)
● Enhanced Load Transient Response
Programmable current limit minimizes inductor size given
the system’s actual requirements. Programmable soft-
start ramp rate, rising and falling ramp rates, and startup
operation provide control over inrush current as the
regulator transitions between operating states. An output
voltage range of 0.25V to 1.525V supports a wide range
of application processors, down to the lowest power
retention states.
● Programmable Ramp-Up and Ramp-Down Slew Rate
● Auto (SKIP/PWM) or Forced PWM Modes
● User-Selectable Phase Configurations
● Multifunction General-Purpose Inputs
● Watchdog Timer Reset Input
● Interrupt Output for Status and Fault Conditions
2
Multifunction general-purpose inputs and high-speed
serial interface provide flexible enable control of each
regulator, DVS operation, and output voltage ramp rate
control that enables rapid output voltage adjustment to
optimize performance in all system operating states.
● High-Speed (Up to 3.4MHz) I C Serial Interface with
an Option for 30MHz SPI Interface
2
The MAX77812 features I C-compatible, 2-wire serial
interface consisting of a bidirectional serial data line
2
(SDA) and a serial clock line (SCL). The MAX77812 I C
supports SCL clock rates up to 3.4MHz. The MAX77812
2
I C can be configured as a 26MHz (typ) SPI interface by
2
I C_SPI_SEL input pin.
The MAX77812 is available in a 64-bump 0.4mm pitch
WLP package with a maximum height of 0.8mm.
Ordering Information appears at end of data sheet.
Applications
● Smartphones
● Tablets
● DSLR Cameras
● Drones
● Micro Processors (CPU/GPU) and FPGAs
19-8541; Rev 3; 8/17