MP9148

6V, 1A, Low Quiescent Current

Dual, SYNC Buck Regulator

MP9148 Rev.1.0

www.MonolithicPower.com

1

11/10/2014

MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.

© 2014 MPS. All Rights Reserved.

The Future of Analog IC Technology

DESCRIPTION

The MP9148 is an internally-compensated,

1MHz fixed-frequency, dual PWM, synchronous,

step-down regulator. The MP9148 operates

from a 2.7V-to-6V input, generates an output

voltage as low as 0.608V, and has a 45µA

quiescent current that makes it ideal for

powering portable equipment that runs on a

single cell lithium-ion (Li+) battery.

The MP9148 integrates dual 100mΩ high-side

switches and 40mΩ synchronous rectifiers for

high efficiency without an external Schottky

diode. Peak-current mode control and internal

compensation limits the minimum number of

readily-available external components.

Fault-condition protections include cycle-by-cycle

current limiting and thermal shutdown.

The MP9148 is available in an 8-pin TSOT23-8

package.

FEATURES

• Dual 1A-Output Current

• >93% Peak Efficiency

• >80% Light-Load Efficiency

• Wide 2.7V-to-6V Operating Input Range

• 100mΩ and 40mΩ Internal Power MOSFET

• 1MHz Fixed Switching Frequency

• Adjustable Output from 0.608V to VIN

• 180° Phase-Shifted Operation

• 100% Duty-Cycle Operation

• 45µA Quiescent Current

• Cycle-by-Cycle Over-Current Protection

• Short-Circuit Protection with Hiccup Mode

• Thermal Shutdown

• Available in an 8-pin TSOT23-8 Package

APPLICATIONS

• Small/Handhold Devices

• DVD Drivers

• Portable Instruments

• Smartphones and Feature Phones

• Battery-Powered Devices

All MPS parts are lead-free and adhere to the RoHS directive. For MPS green

status, please visit MPS website under Quality Assurance. “MPS” and “The

Future of Analog IC Technology” are Registered Trademarks of Monolithic

Power Systems, Inc.

TYPICAL APPLICATION

22 F

R1

806k

IN

EN1

EN2

SW1

SW2

GND

FB1

FB2

22 F

R2

412k

R3

806k

R4

825k

22 F

VIN

5V

VOUT1

1.8V

VOUT2

1.2V

MP9148

L1

1.5

L2

1.5

EN1

EN2

30

40

50

60

70

80

90

100

0.01

0.1

1