MPQ8616-12 Datasheet, PDF (1/29 Pages) Monolithic Power Systems – High Efficiency, 6A/12A, 6V Synchronous Step-Down Converter

MPQ8616
High Efficiency, 6A/12A, 6V
Synchronous Step-Down Converter
DESCRIPTION
The MPQ8616 is fully integrated high frequency
synchronous rectified step-down switch mode
converter. It offers very compact solutions to
achieve 6A/12A output current from a 3V to 6V
input with excellent load and line regulation.
Constant-On-Time (COT) control mode provides
fast transient response and eases loop
stabilization. The MPQ8616 can operate with a
low-cost electrolytic capacitor and can support
ceramic output capacitor with external slope
compensation.
Operating frequency is programmed by an
external resistor and is compensated for
variations in V_IN. It is almost constant with all the
input voltage and output load conditions.
Under voltage lockout is internally set at 2.8 V,
but can be increased by programming the
threshold with a resistor network on the enable
pin. The output voltage startup ramp is controlled
by the soft start pin. A power good signal
indicates the output is within its nominal voltage
range.
Full fault protection including OCP, SCP, OVP
UVP and OTP is provided by internal
comparators.
The MPQ8616 requires a minimum number of
readily available standard external components and
are available in QFN3x4 packages.
FEATURES
 Wide 3V to 6V Operating Input Range
 6A/12A Output Current
 Low R_DS(ON) Internal Power MOSFETs
 Proprietary Switching Loss Reduction
Technique
 Adaptive COT for Ultrafast Transient
Response
 1% Reference Voltage Over -20C to +85C
Junction Temperature Range
 Programmable Soft Start Time
 Pre-Bias Start up
 Programmable Switching Frequency from
300kHz to 1MHz.
 Minimum On Time T_{ON_MIN}=60ns
Minimum Off Time T_{OFF_MIN}=100ns
 Non-latch OCP, non-latch OVP Protection
and Thermal Shutdown
 Output Adjustable from 0.61V to 4.5V
APPLICATIONS
 Telecom System Base Stations
 Networking Systems
 Server
 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.
TYPICAL APPLICATION
VIN
C1
RFREQ
ON/OFF
VCC
C5
R3
IN
BST
FREQ
SW
EN _MPQ8616
VCC
FB
SS
PG
PGND AGND
C3
L1
R4
C4
VOUT
R1
C2
R2
C6
MPQ8616 Rev. 1.01
www.MonolithicPower.com
1
8/4/2013
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
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