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TPS5130
SLVS426 – MAY 2002
TRIPLE SYNCHRONOUS BUCK CONTROLLER
WITH NMOS LDO CONTROLLER
FEATURES
APPLICATIONS
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Notebook PCs, PDAs
Consumer Game Systems
DSP Application
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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
DESCRIPTION
The TPS5130 is composed of three independent
synchronous buck regulator controllers (SBRC) and
one low drop-out (LDO) regulator controller. On-chip
high-sideand low-side synchronous rectifier driversare
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.
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Output Voltage Range
– Switcher: 0.9 V ~ 5.5 V
– LDO: 0.9 V ~ 2.5 V
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Synchronous for High Efficiency
Precision V (±1.5%)
ref
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
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Overvoltage and Undervoltage Protection
Programmable Short-Circuit Protection
Powergood With Programmable Delay Time
5-V and 3.3-V Linear Regulators
VIN
VIN
OUT3_u
OUT1_u
LL1
Vo3
LL3
Vo1
5 V
OUT3_d
OUT1_d
TPS5130
INV3
INV1
REG5V_IN
LDO_IN
OUT2_u
LL2
LDO_CUR
Vo3
LDO_GATE
INV_LDO
OUT2_d
Vo_LDO
INV2
GND
Seeapplication section of this data sheet for more detailed information.
Pleasebe aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments
semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date. Products
conform to specifications per the terms of Texas Instruments standard warranty.
Production processing does not necessarily include testing of all parameters.
Copyright 2002, Texas Instruments Incorporated