FEATURES

Three Independent Step-Down DC/DC

Controllers and One LDO Controller

Input Voltage Range

− Switcher: 4.5 V ~ 28 V

− LDO: 1.1 V ~ 3.6 V

Output Voltage Range

− Switcher: 0.9 V ~ 5.5 V

− LDO: 0.9 V ~ 2.5 V

Synchronous for High Efficiency

Precision Vref (±1.5%)

PWM Mode Control : Max. 500 kHz Operation

Auto PWM/SKIP Mode Available

High Speed Error Amplifier

Over Current Protection With Temperature

Compensation Circuit for Each Channel

Overvoltage and Undervoltage Protection

Programmable Short-Circuit Protection

Powergood With Programmable Delay Time

5-V and 3.3-V Linear Regulators

APPLICATIONS

Notebook PCs, PDAs

Consumer Game Systems

DSP Application

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.