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TPS5130-TPS5130PT-TPS5130PTR-TPS5130PTRG4
Triple Synchronous Buck Controller with LDO Controller
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SLVS426 − MAY 2002
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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
DESCRIPTIONThe 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
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