TPS5130

SLVS426 – MAY 2002

TRIPLE SYNCHRONOUS BUCK CONTROLLER

WITH NMOS LDO CONTROLLER

FEATURES

Controllers and One LDO Controller

– Switcher: 4.5 V ~ 28 V

– LDO: 1.1 V ~ 3.6 V

– Switcher: 0.9 V ~ 5.5 V

– LDO: 0.9 V ~ 2.5 V

Compensation Circuit for Each Channel

APPLICATIONS

DESCRIPTION

The TPS5130 is composed of three independent

synchronous buck regulator controllers (SBRC) and

one low drop-out (LDO) regulator controller. On-chip

high-side and low-side synchronous rectifier drivers are

integrated

to

drive

less

expensive

N-channel

MOSFETs. The LDO controller can also drive an

external N-channel MOSFET. Since the input current

ripple is minimized by operating 180 degree out of

phase, it allows a smaller input capacitance resulting in

reduced power supply cost. The SBRC of the TPS5130

automatically adjusts from PWM mode to SKIP mode

to maintain high efficiency under light load conditions.

Resistor-less current protection for the synchronous

buck controller and the fixed high-side driver voltage

simplifies the system design and reduces the external

parts count. The LDO controller has a current limit

protection and overshoot protection to suppress output

voltage hump at load transient. To further extend

battery life, the TPS5130 features dead-time control

and very low quiescent current.

See application section of this data sheet for more detailed information.

VIN

Vo1

5 V

Vo3

Vo3

Vo_LDO

TPS5130

OUT3_u

OUT1_u

OUT3_d

OUT1_d

LL3

LL1

VIN

INV3

INV1

OUT2_u

OUT2_d

LL2

INV2

LDO_IN

LDO_GATE

LDO_CUR

INV_LDO

REG5V_IN

GND

PRODUCTION DATA information is current as of publication date. Products

conform to specifications per the terms of Texas Instruments standard warranty.

Production processing does not necessarily include testing of all parameters.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments

semiconductor products and disclaimers thereto appears at the end of this data sheet.

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Copyright

 2002, Texas Instruments Incorporated