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