1FEATURES

· Qualified for Automotive Applications

· Three Independent Step-Down DC/DC

Controllers and One LDO Controller

· Input Voltage Range

– Switcher: 4.5 V to 28 V

– LDO: 1.1 V to 3.6 V

· Output Voltage Range

– Switcher: 0.9 V to 8.5 V

– LDO: 0.9 V to 2.5 V

· Synchronous for High Efficiency

· Precision Vref (±1.5%)

· PWM Mode Control : 500-kHz Operation (Max)

· Auto PWM/SKIP Mode Available

· High-Speed Error Amplifier

· Overcurrent Protection With Temperature

Compensation Circuit for Each Channel

· Overvoltage and Undervoltage Protection

· Programmable Short-Circuit Protection

· Power Good Output (PGOUT) With

Programmable Delay Time

· 5-V and 3.3-V Linear Regulators

APPLICATIONS

· Notebook PCs, PDAs

· Consumer Game Systems

· DSP Applications

DESCRIPTION

The TPS5130 is composed of three independent synchronous buck regulator controllers (SBRC) and one low

dropout (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.

Because the input current ripple is minimized by operating 180° 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. Resistorless 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 spikes at load transient. To further extend battery life, the TPS5130 features dead-time control

and very low quiescent current.