TPS5130 Datasheet, PDF (1/28 Pages) Texas Instruments – TRIPLE SYNCHRONOUS BUCK CONTROLLER WITH NMOS LDO CONTROLLER

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TRIPLE SYNCHRONOUS BUCK CONTROLLER
WITH NMOS LDO CONTROLLER
TPS5130
SLVS426 – MAY 2002
FEATURES
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
D Output Voltage Range
– Switcher: 0.9 V ~ 5.5 V
– LDO: 0.9 V ~ 2.5 V
D Synchronous for High Efficiency
D Precision V_ref (±1.5%)
D PWM Mode Control : Max. 500 kHz Operation
D Auto PWM/SKIP Mode Available
D High Speed Error Amplifier
D Over Current Protection With Temperature
Compensation Circuit for Each Channel
D Overvoltage and Undervoltage Protection
D Programmable Short-Circuit Protection
D Powergood With Programmable Delay Time
D 5-V and 3.3-V Linear Regulators
APPLICATIONS
D Notebook PCs, PDAs
D Consumer Game Systems
D DSP Application
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
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.
VIN
OUT3_u OUT1_u
Vo3
LL3
LL1
OUT3_d OUT1_d
TPS5130
INV3
INV1
VIN
Vo1
5V
REG5V_IN
LDO_IN
OUT2_u
LDO_CUR
LL2
Vo3
LDO_GATE
OUT2_d
Vo_LDO
INV_LDO
GND ^INV2
See application section of this data sheet for more detailed information.
Please be 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