TPS51312_16 Datasheet, PDF (1/21 Pages) Texas Instruments – 3.1V to 5.5V Input 3-A Output Synchronous Step-Down Regulator

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TPS51312
SLUSB57 – SEPTEMBER 2012
3.1-V to 5.5-V Input, 3-A Output, Synchronous, Step-Down Regulator with Integrated FETs
Check for Samples: TPS51312
FEATURES
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•23 D-CAP2™ Mode Enables Fast Transient
Response
• No External Compensation Required
• Input Voltage VIN Range: 3.1 V to 5.5 V
• Bias Voltage VCC Range: 3.1 V to 5.5 V
• Output Voltage Range: 0.6 V to 3.3 V
• 0.6-V, 1% Voltage Reference Accuracy
• Fixed Voltage Servo Soft-Start Function
• Auto-Skip, Eco-mode™ for High Efficiency at
Light Loads
• Switching Frequency: 900-kHz
• UVLO, UVP, OTP and OVP Power Good Output
• Cycle-By-Cycle Current Limit, Latch-off OCP
• Thermally Enhanced 3 mm x 3 mm, 10-pin
SON (DRC)
APPLICATIONS
• Battery Powered Equipment
• Notebook Computers
DESCRIPTION
The TPS51312 is a high-efficiency, synchronous,
step-down DC/DC converter. It supports 3-A
(maximum) of dc output current at output voltages
from 0.6 V to 3.3 V. The D-CAP2 mode adaptive on-
time control allows a small footprint when designed
using all ceramic output capacitors and offers a low
external component count. The device also features
auto-skip function at light load condition, pre-biased
start-up and internally fixed soft-start time. When the
device is disabled, the output capacitor is discharged
through internal resistor.
The TPS51312 is available in a 3 mm x 3 mm, 10-pin
DRC package (Green RoHS compliant and Pb free)
and is specified between –40°C and 85°C.
X
SIMPLIFIED APPLICATION
C_FF
R_FB1
V_IN
3.1 V to 5.5 V
C1
EN
R_FB2
TPS51312
10 VIN
SW 2
9 VIN
SW 3
8 VCC
PGOOD 4
6 FB
NC 1
5 EN
NC 7
GND
(Thermal Pad)
L1
PGOOD
V_OUT
C2 C3
UDG-12125
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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.
D-CAP2, Eco-mode are trademarks of Texas Instruments.
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All other trademarks are the property of their respective owners.
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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 © 2012, Texas Instruments Incorporated