www.ti.com SLVS426 -MAY 2002
FEATURES APPLICATIONS
D Notebook PCs, PDAs
D Consumer Game Systems
D DSP Application D Three Independent Step-Down DC/DC
Controllers and One LDO Controller D Input Voltage Range
-Switcher: 4.5 V ~ 28 V
-LDO: 1.1 V ~ 3.6 V 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 …
