MPQ8632-6 Datasheet, PDF (1/46 Pages) Monolithic Power Systems – High Efficiency 18V Synchronous Step-down Converter Family for 4A to 20A

MPQ8632
High Efficiency 18V Synchronous
Step-down Converter Family for 4A to 20A
Part Number
MPQ8632GLE-4
Current
Rating (A)
4
MPQ8632GLE-6
6
MPQ8632GLE-8
8
MPQ8632HGLE-10
10
MPQ8632GLE-10
10
MPQ8632GLE-12
12
MPQ8632GVE-15
15
MPQ8632GVE-20
20
Input Voltage
2.5V to 18V
2.5V to 18V
2.5V to 18V
2.5V to 18V
2.5V to 18V
2.5V to 18V
2.5V to 18V
2.5V to 18V
OVP Mode
Non-Latch
Non-Latch
Non-Latch
Non-Latch
Latch-Off
Non-Latch
Non-Latch
Non-Latch
DESCRIPTION
The MPQ8632 is a fully integrated high
frequency synchronous rectified step-down
switch mode converter. It offers a very compact
solution to achieve 4A/6A/8A/10A/12A/15A/20A
output current over a wide input supply range
with excellent load and line regulation.
The MPQ8632 uses Constant-On-Time (COT)
control mode to provide 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 feedforward
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 MPQ8632 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
 Low Input Voltage Range from 2.5V:
-- 2.5V to 18V with External 5V Bias
-- 4.5V to 18V with Internal Bias
 Scalable Family of Products for 4A to 20A
Output Current Applications
-- 4A/6A/8A/10A/12A Share the Same
Footprint
--15A/20A Share the Same Footprint, with
Slight Change on Power Stage Section
from 4A/6A/8A/10A/12A
 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 Protection
 Output Adjustable from 0.611V to 13V
APPLICATIONS
 Telecom and Networking Systems
 Base Stations
 Servers
 Personal Video Recorders
 Flat Panel Television 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.
MPQ8632 Rev.1.24
www.MonolithicPower.com
1
8/28/2013
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2013 MPS. All Rights Reserved.