General Description

The MAX16425/MAX16425A are fully-integrated, highly

efficient switching regulators for applications operating

from 4.5V to 16V input supplies that require up to 25A

maximum load. These single-chip regulators provide a

compact high-efficiency, power-delivery solution for precision

outputs that demand fast transient response.

The two devices have different programmability options

(see Table 3a and 3b for details) to enable a wide range

of configurations. The programmable features include:

internal/external reference voltage, output voltage

set-point, switching frequency, overcurrent protection level

(OCP), and soft-start timing. Discontinuous current mode

(DCM) operation can be enabled through pin-strapping to

improve light-load efficiency.

The MAX16425/MAX16425A include multiple protection

and measurement features. Positive and negative cycleby-

cycle OCP, short-circuit protection and overtemperature

protection (OTP) ensure robust design. Input undervoltage

and overvoltage lockout shut down the regulator to prevent

damage when the input voltage is out of specification.

Regulation is halted in case of an output overvoltage

(OVP) event. A status pin indicates that the output voltage

is within range and the output voltage is in regulation.

The device has an analog output that can be configured

to report output current or junction temperature with ±5

and ±8°C accuracy, respectively.

The devices are available in a 27-bump (2.2mm x 3.8mm)

WLCSP package that provides low thermal resistance

and minimizes the PCB area.

Benefits and Features

● High-Efficiency Solution

• Up to 97 Peak

• Up to 87 Full-Load

• Up to 96 Light-Load Efficiency at 1A with DCM

Enabled

● Flexible Design Allows Early PCB Definition

• Footprint Compatible with VT2491 (15A) and

Related Scalable Products

• Programmable Switching Frequency Up to 1MHz

• Programmable Soft-Start and STAT Delay Timings

• Programmable Reference Voltage with External

Input Option

• Programmable Positive and Negative OCP Limit

● Advanced Architecture, Protection and Reporting

Guarantees Reliable Designs

• Analog Current or Temperature Reporting

• Differential Remote Sense with Open-Circuit

Detection

• Fast Transient Response with Quick-PWM™

Architecture

• Percentage-Based Output Power Good and OVP

• Open-Drain Status Indicator (STAT) Pin

• Input Undervoltage and Overvoltage Lockout

• Adaptive Dead Time Control

● Saves Board Space

• Integrated Boost Switch

• 27-Bump WLCSP (2.2mm x 3.8mm) Footprint

• Operation Using Ceramic Input and Output Capacitors

Applications

● Servers/μServers

● I/O and Chipset Supplies

● GPU Core Supply

● DDR Memory: VDDQ, VPP and VTT

● Point-of-Load (PoL) Applications