TPS5130-Q1 Datasheet, PDF (1/31 Pages) Texas Instruments – TRIPLE SYNCHRONOUS BUCK CONTROLLER WITH NMOS LDO CONTROLLER

TPS5130-Q1
www.ti.com................................................................................................................................................................................................... SLVS866 – MARCH 2009
TRIPLE SYNCHRONOUS BUCK CONTROLLER WITH NMOS LDO CONTROLLER
FEATURES
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• 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 V_ref (±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.
Vo3
8.5 V
(see Note B)
VIN
OUT3_u OUT1_u
LL3
LL1
OUT3_d OUT1_d
TPS5130
INV3
INV1
VIN
Vo1
8.5 V
(see Note B)
Vo_LDO
REG5V_IN
LDO_IN
OUT2_u
LDO_CUR
LL2
LDO_GATE
OUT2_d
INV_LDO
GND ^INV2
Vo2
8.5 V
(see Note B)
A. See the Application Information section for more details.
B. To determine input voltage, see Duty Control in Electrical Characteristics.
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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 the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2009, Texas Instruments Incorporated