TPS51313 Datasheet, PDF (1/19 Pages) Texas Instruments – 5-V Input or 3.3-V Input, 3-A, Fully Integrated Converter

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TPS51313
SLUSB31 – SEPTEMBER 2012
5-V Input or 3.3-V Input, 3-A, Fully Integrated Converter
Check for Samples: TPS51313
FEATURES
1
•234 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
• Switching Frequency: 1 MHz
• No External Compensation is Required
• Fixed Voltage Servo Soft-Start Function
• Thermal Shutdown
X
FB 1
VCC 2
VIN 3
PGND 4
PGND 5
Thermal
Pad
10 EN
9 PGOOD
8 NC
7 SW
6 SW
APPLICATIONS
• Discrete Graphics PCIe^® PEX Rail
• Low-Voltage Point-of-Load (POL) Rails
DESCRIPTION
The TPS51313 is an easy-to-use, fully integrated,
synchronous buck converter for low voltage point-of-
load applications. It is designed to meet the NVIDIA™
OpenVreg Type 0 specifications, including the
package and footprint requirement. 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,
constant on-time control with 1-MHz switching
frequency 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 TPS51313 is available
in a 3 mm x 3 mm, 10-pin DRC package (Green
RoHS compliant and Pb free) and is specified
between –10°C and 85°C.
X
SIMPLIFIED APPLICATION
C_FF
R1
R2
V_IN
3.3 or
C_IN
5V
TPS51313
FB
EN
VCC
PGOOD
VIN
NC
PGND
SW
PGND
SW
Thermal Pad
L_OUT
EN
PGOOD
C_OUT
V_OUT
UDG-12083
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.
D-CAP2 is a trademark of Texas Instruments.
2
NVIDIA is a trademark of NVIDIA, Incorporated.
3
PCIe is a registered trademark of PLX Technology, Inc.
4
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