MAX38800
Integrated, Step-Down Switching Regulator With
Selectable Applications Configurations
General Description
Benefits and Features
● High-Efficiency Solution
The MAX38800 is a fully integrated, highly efficient
switching regulator for applications operating from 6.5V to
14V 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.
• 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 MAX38801 (15A) and
MAX38802/MAX38803 (25A)
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, overcurrent
protection level (OCP), and soft-start timing. Discontinuous
current mode (DCM) operation can be enabled using pin-
strapping to improve light-load efficiency.
• 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
The MAX38800 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 output voltage is in regulation. The
device has an analog output that can be configured to
report output current or junction temperature.
● 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
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.
● 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
Basic Application Circuit
● DDR Memory: VDDQ, VPP and VTT
● Point-of-Load (PoL) Applications
V
CC
V
DDH
C
VCC
C
IN
V
DDH
V
CC
MAX38800
C
BST
V
OUT
BST
VX
R
STAT
CURRENT
INPUT
OUTPUT
L
OUT
RATING (A)
VOLTAGE (V)
VOLTAGE (V)
Ramp Compensation
R
R
STAT
SENSE+
9
6.5 to 14
0.6 to 5.5
C
R1
C
R2
R
OE
OE
SENSE-
GND
R
FB1
AGND
Ordering Information appears at end of data sheet.
C
R
LEAD
LEAD
PGM
R
LAG
Lead Compensation
C_SEL
C
OUT
R_SEL
R
FB2
Quick-PWM is a trademark of Maxim Integrated Products, Inc.
C
LAG
19-100047; Rev 0; 9/17
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