MPQ8636-20 Datasheet, PDF (1/41 Pages) Monolithic Power Systems – High Efficiency, 10/20A, 18V Synchronous, Step-Down Converter

MPQ8636
High Efficiency, 10/20A, 18V
Synchronous, Step-Down Converter
Part Number
Package
MPQ8636GLE-
10
MPQ8636HGLE-
10
MPQ8636GVE-
20
QFN(3x4mm)
QFN(3x4mm)
QFN(5x4mm)
Input
Voltage
4.5V to 18V
4.5V to 18V
4.5V to 18V
OVP
Latch-off
Non-
Latch
Non-
Latch
DESCRIPTION
The MPQ8636 is a fully-integrated, high-
frequency, synchronous, rectified, step-down,
switch-mode converter. It offers a very compact
solution to achieve 10A/20A output current over a
wide input supply range, with excellent load and
line regulation. The MPQ8636 operates at high
efficiency over a wide output-current–load range.
The MPQ8636 uses Constant-On-Time (COT)
control to provide a fast transient response and
ease loop stabilization.
An external resistor programs the operating
frequency from 200kHz to 1MHz, and the
frequency keeps nearly constant as input
supply varies with the feed-forward
compensation.
The default under-voltage lockout threshold is
internally set at 4.1V, but a resistor network on
the enable pin can increase this threshold. The
soft-start pin controls the output-voltage startup
ramp. An open-drain power-good signal
indicates that the output is within nominal
voltage range.
It has fully-integrated protection features that
include over-current protection, over-voltage
protection and thermal shutdown.
The MPQ8636 requires a minimal number of
readily-available standard external components
and is available in a 16-Pin QFN 3mm×4mm or a
29-Pin QFN 5mm×4mm package.
FEATURES
 Wide 4.5V-to-18V Operating Input Range
 10A/20A Output Current
 Optimal Low R_DS(ON) Internal Power
MOSFETs Per Device
 Proprietary Switching-Loss–Reduction
Technique
 Adaptive COT for Ultrafast Transient
Response
 0.5% Reference Voltage Over 0°C to 70°C
Junction Temperature Range
 Programmable Soft-Start Time
 Pre-Bias Start-Up
 Programmable Switching Frequency from
200kHz to 1MHz
 Non-Latch OCP, OVP, and Thermal
Shutdown
 Output Adjustable from 0.611V to 13V
APPLICATIONS
 Telecom and Networking Systems
 Base Stations
 Servers
 Personal Video Recorders
 Flat-Panel Televisions and Monitors
 Distributed Power Systems
All MPS parts are lead-free and adhere to the RoHS directive. For MPS green
status, please visit MPS website under Products, Quality Assurance page.
“MPS” and “The Future of Analog IC Technology” are registered trademarks of
Monolithic Power Systems, Inc.
MPQ8636 Rev. 1.23
www.MonolithicPower.com
1
9/9/2013
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2013 MPS. All Rights Reserved.