General Description
The MAX16491 is a fully integrated, highly efficient
switching regulator for applications operating from 4.5V to
16V input supplies that require up to 9A maximum load.
This single-chip regulator provides compact high-efficiency
power delivery for precision outputs that demand fast
transient response.
The device has different programmability options to
enable a wide range of configurations. The programmable
features include: internal/external reference voltage,
output voltage set-point, switching frequency, overcurrentprotection
level (OCP), and soft-start timing. Discontinuous
current mode (DCM) operation can be enabled using
pin-strapping to improve light-load efficiency.
The MAX16491 includes multiple protection and measurement
features. Positive and negative cycle-by-cycle OCP,
short-circuit protection and overtemperature protection
(OTP) ensure robust design. Input undervoltage and
overvoltage lockout shut down the regulator to prevent
damages 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 outputvoltage is in regulation. The
device has an analog output that can be configured to
report output current or junction temperature.
The device is available in a 19-bump (2.2mm x 2.8mm)
WLCSP package that provides low thermal resistance
and minimizes the printed circuit board area.

Benefits and Features
● High-Efficiency Solution
• Up to 96% Peak
• Up to 95.5% Full Load
• Up to 94% Light-Load Efficiency at 1A with DCM
Enabled
● Flexible Design Allows Early PCB Definition
• Footprint Compatible with VT2491/VT2491A 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
• Supports Current Sourcing and Sinking
● 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
• 19-Bump WLCSP (2.2mm x 2.8mm) 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