MPQ8633A
16 V, 12 A, Synchronous Step-Down
Converter with Adjustable Current Limit,
Programmable Frequency, and Voltage Tracking
The Future of Analog IC Technology
DESCRIPTION
FEATURES
The MPQ8633A is a fully integrated, high-
frequency, synchronous buck converter. It
offers a very compact solution to achieve up to
12 A output current over a wide input supply
range with excellent load and line regulation.
The MPQ8633A operates at high efficiency
over a wide output current load range.
Wide Input Voltage Range from 2.7 V:
--2.7 V to 16 V with External 3.3 V Bias,
--4 V to 16 V with Internal Bias or External
3.3 V Bias
Differential Output Voltage Remote Sense
Programmable Accurate Current Limit Level
12 A Output Current
Low RDS(ON) Integrated Power MOSFETs
Proprietary Switching Loss Reduction
Technique
Adaptive COT for Ultrafast Transient
Response
Stable with Zero ESR Output Capacitor
0.5% Reference Voltage over 0C to
+70C Junction Temperature Range
1% Reference Voltage from -40C to
+125C Junction Temperature Range
Selectable Pulse Skip or Forced CCM
Operation
The MPQ8633A adopts internally compensated
constant-on-time (COT) control mode that
provides fast transient response and eases loop
stabilization.
The operating frequency is set easily to
600 kHz, 800 kHz, or 1000 kHz with the MODE
configuration,
allowing
the
MPQ8633A
frequency to remain constant regardless of the
input/output voltages.
The output voltage start-up ramp is controlled
by an internal 1 ms timer. It can be increased
by adding a capacitor on TRK/REF. An open-
drain power good signal indicates the output is
within its nominal voltage range. The PGOOD is
clamped to around 0.7V with external pull-up
voltage when the input supply fails to power the
MPQ8633A.
Excellent Load Regulation
Output Voltage Tracking
Output Voltage Discharge
PGOOD Active Clamped Low Level during
Power Failure
Programmable Soft-Start Time from 1 ms
Pre-Bias Start-Up
Fully integrated protection features include OCP,
OVP, UVP, and OTP.
Selectable Switching Frequency from
600 kHz, 800 kHz, and 1000 kHz
Non-Latch OCP, UVP, UVLO, Thermal
Shutdown, and Latch-Off for OVP.
Output Adjustable from 0.6 V to 90%*Vin,
up to 5.5 V Max.
The MPQ8633A requires a minimum number of
readily available, standard, external components
and is available in a QFN 3mm x 4mm package.
Available in a QFN 3mm x 4mm Package
APPLICATIONS
Telecom and Networking Systems
Servers
Base Stations
All MPS parts are lead-free, halogen-free, and adhere to the RoHS directive.
For MPS green status, please visit the MPS website under Quality
Assurance.
“MPS” and “The Future of Analog IC Technology” are registered trademarks of
Monolithic Power Systems, Inc.
MPQ8633A Rev.1.03
8/21/2017
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2017 MPS. All Rights Reserved.
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