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.