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TPS51275CRUKR Datasheet(PDF) 1 Page - Texas Instruments

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Part # TPS51275CRUKR
Description  Dual Synchronous, Step-Down Controller with 5-V and 3.3-V LDOs
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

TPS51275CRUKR Datasheet(HTML) 1 Page - Texas Instruments

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TPS51275, TPS51275C
www.ti.com
SLUSB45 – JUNE 2012
Dual Synchronous, Step-Down Controller with 5-V and 3.3-V LDOs
1
FEATURES
APPLICATIONS
2
Input Voltage Range: 5 V to 24 V
Notebook Computers
Output Voltages: 5 V and 3.3 V (Adjustable
Tablet Computers
Range ±10%)
DESCRIPTION
Built-in, 100-mA, 5-V and 3.3-V LDOs
The
TPS51275/C
is
a
cost-effective,
dual-
Clock Output for Charge-Pump
synchronous buck controller targeted for notebook
±1% Reference Accuracy
system-power supply solutions. It provides 5-V and
Adaptive On-time D-CAP™ Mode Control
3.3-V LDOs and requires few external components.
The 260-kHz VCLK output can be used to drive an
Architecture with 300kHz/355kHz Frequency
external charge pump, generating gate drive voltage
Setting
for the load switches without reducing the main
Auto-skip Light Load Operation
converter efficiency. The TPS51275/C supports high
Internal 0.8-ms Voltage Servo Soft-Start
efficiency, fast transient response and provides a
combined power-good signal. Adaptive on-time, D-
Low-Side RDS(on) Current Sensing Scheme with
CAP™ control provides convenient and efficient
4500 ppm/°C Temperature Coefficient
operation. The device operates with supply input
Built-in Output Discharge Function
voltage ranging from 5 V to 24 V and supports output
Separate Enable Input for Switchers
voltages of 5.0 V and 3.3 V. The TPS51275/C is
available in a 20-pin, 3 mm × 3 mm, QFN package
Dedicated OC Setting Terminals
and is specified from –40°C to 85°C.
Power Good Indicator
OVP/UVP/OCP Protection
Non-latch UVLO/OTP Protection
20-Pin, 3 mm × 3 mm, QFN (RUK)
ORDERING INFORMATION(1)
ORDERABLE
ENABLE
ALWAYS ON-LDO
PACKAGE
OUTPUT SUPPLY
QUANTITY
FUNCTION
DEVICE NUMBER
TPS51275RUKR
Tape and Reel
3000
VREG3
PLASTIC Quad Flat
TPS51275RUKT
Mini reel
250
Pack
EN1 and EN2
TPS51275CRUKR
Tape and Reel
3000
(20 pin QFN)
VREG3 and VREG5
TPS51275CRUKT
Mini reel
250
(1)
For the most current package and ordering information see the Package Option Addendum at the end of this document, or see the TI
website at www.ti.com.
1
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.
2
D-CAP is a trademark of Texas Instruments.
PRODUCTION DATA information is current as of publication date.
Copyright © 2012, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.


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