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TPS51285B Datasheet(PDF) 1 Page - Texas Instruments

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Part # TPS51285B
Description  Ultra-Low Quiescent (ULQ) Dual Synchronous Step-Down Controller with 5V and 3.3V LDOs
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

TPS51285B Datasheet(HTML) 1 Page - Texas Instruments

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TPS51285A
TPS51285B
www.ti.com
SLVSBX0 – APRIL 2013
Ultra-Low Quiescent (ULQ™) Dual Synchronous Step-Down Controller with
5V and 3.3V LDOs
Check for Samples: TPS51285A, TPS51285B
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 TPS51285A and TPS51285B are cost-effective,
Clock Output for Charge-Pump
dual synchronous buck controllers with 5-V and 3.3-V
±1% Reference Accuracy
LDOs, targeted for notebook system-power supply
Adaptive On-Time D-CAP™ Mode Control
solutions.
The
device
achieves
low
power
consumption by the use of auto-skip and ULQ™
Architecture with 400 kHz (CH1) and 475 kHz
modes, which is beneficial for long battery life in
(CH2) Frequency
system stand-by mode. The 256-kHz VCLK output is
Auto-skip and ULQ™ modes for long battery
provided
to
drive
an
external
charge
pump,
life in system stand-by mode
generating gate drive voltage for the load switches
Internal 0.8-ms Voltage Servo Soft-Start
with minimum power consumption in the main
converter. The device employs adaptive on-time D-
Low-Side RDS(on) Current Sensing Scheme
CAP™
mode
control
which
enables
fast
load
Built-In Output Discharge Function
transient response without external compensation
Separate Enable Input for Switchers
network. The TPS51285A/B operates with supply
input voltage ranging from 5V to 24V and supports
Dedicated OC Setting Terminals
output voltages of 5 V and 3.3 V. The TPS51285A
Power Good Indicator
and TPS51285B are available in a 20-pin 3 x 3 (mm)
OVP, UVP and OCP Protection
QFN package and is specified from -40°C to 85°C.
Non-Latch UVLO and OTP Protection
20-Pin, 3 mm x 3 mm, QFN (RUK)
NEED SOME SPACE
ORDERING INFORMATION(1)
ORDERABLE
ALWAYS On-LDO
OUTPUT SUPPLY
QUANTITY
DEVICE NUMBER
TPS51285ARUKR
Tape and Reel
3000
VREG3
TPS51285ARUKT
Mini reel
250
TPS51285BRUKR
Tape and Reel
3000
VREG3 and VREG5
TPS51285BRUKT
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, ULQ are trademarks of Texas Instruments.
PRODUCTION DATA information is current as of publication date.
Copyright © 2013, 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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