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TPS53127 Datasheet Preview

TPS53127 Datasheet

Dual Synchronous Step-Down Controller

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TPS53127
SLVSA93A – MARCH 2010 – REVISED AUGUST 2014
TPS53127 Dual Synchronous Step-Down Controller
For Low Voltage Power Rails
1 Features
1 D-CAP2™ Mode Control
– Fast Transient Response
– No External Parts Required for Loop
Compensation
– Compatible With Ceramic Output Capacitors
• High Initial Reference Accuracy (±1%)
• Low Output Ripple
• Wide Input Voltage Range: 4.5 V to 24 V
• Output Voltage Range: 0.76 V to 5.5 V
• Low-Side RDS(ON) Loss-Less Current Sensing
• Adaptive Gate Drivers with Integrated Boost Diode
• Adjustable Soft Start
• Non-Sinking Pre-Biased Soft Start
• 700-kHz Switching Frequency
• Cycle-by-Cycle Over-Current Limiting Control
• 30-mV to 300-mV OCP Threshold Voltage
• Thermally Compensated OCP by 4000 ppm/°C at
ITRIP
2 Applications
• Point-of-Load Regulation in Low Power Systems
for Wide Range of Applications
– Digital TV Power Supply
– Networking Home Pin
– Digital Set-Top Box (STB)
– DVD Player/Recorder
– Gaming Consoles
3 Description
The TPS53127 is a dual, adaptive on-time D-CAP2™
mode synchronous buck controller. The part enables
system designers to cost effectively complete the
suite of various end equipment's power bus
regulators with a low external component count and
low standby consumption. The main control loop for
the TPS53127 uses the D-CAP2™ Mode topology
which provides a very fast transient response with no
external component.
The TPS53127 also has a proprietary circuit that
enables the device to adapt not only low equivalent
series resistance (ESR) output capacitors such as
POSCAP/SP-CAP, but also ceramic capacitor. The
part provides a convenient and efficient operation
with conversion voltages from 4.5 V to 24 V and
output voltage from 0.76 V to 5.5 V.
The TPS53127 is available in the 24 pin RGE/PW
package, and is specified from –40°C to 85°C
ambient temperature range.
Device Information(1)
DEVICE NAME
PACKAGE
BODY SIZE (NOM)
TPS53127
TSSOP (24)
VQFN (24)
7.80mm x 4.40mm
4.00mm x 4.00mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet
4 Simplified Schematic
Input Voltage
4.5V to 24V
C9
10uF
PGND
R4
3.63kΩ
R5
10kΩ
C10
4700pF
R2
10kΩ
SGND
R1
13.5kΩ
65 4 3 21
VO2
1.05V/4A
C6
10uF
Q3
FDS8878
L2
SPM6530T
1.5uH
Q4
FDS8690
C5
0.1uF
7 EN2
8 VBST2
9 DRVH2
10 SW2
11 DRVL2
12 PGND2
Power PAD
TPS53127 RGE
(QFN )
EN1 24
VBST1 23
DRVH1 22
SW1 21
DRVL1 20
PGND1 19
C4
22uFx2
PGND
13 14 15 16 17 18
R6
4.7kΩ
CC7
R
1uF 4.7uF 4.3kΩ
C11
4700pF
PGND
SGND
C2
0.1uF
Q1
FDS8878
L1
SPM6530T
1.5uH
L1
Q2
FDS8690
C3
10uF
VO1
1.8V/4A
PGND
C1
22uFx2
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.




etcTI

TPS53127 Datasheet Preview

TPS53127 Datasheet

Dual Synchronous Step-Down Controller

No Preview Available !

TPS53127
SLVSA93A – MARCH 2010 – REVISED AUGUST 2014
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Simplified Schematic............................................. 1
5 Revision History..................................................... 2
6 Pin Configuration and Functions ......................... 3
7 Specifications......................................................... 4
7.1 Absolute Maximum Ratings ...................................... 4
7.2 Handling Ratings....................................................... 4
7.3 Recommended Operating Conditions....................... 4
7.4 Thermal Information .................................................. 5
7.5 Electrical Characteristics.......................................... 5
7.6 Timing Requirements ................................................ 6
7.7 Switching Characteristics .......................................... 6
7.8 Typical Characteristics .............................................. 7
8 Detailed Description .............................................. 9
8.1 Overview ................................................................... 9
8.2 Functional Block Diagram ......................................... 9
8.3 Feature Description................................................. 10
8.4 Device Functional Modes........................................ 12
9 Application and Implementation ........................ 13
9.1 Application Information............................................ 13
9.2 Typical Application, QFN ........................................ 13
9.3 Typical Application Circuit, TSSOP......................... 18
10 Power Supply Recommendations ..................... 19
11 Layout................................................................... 19
11.1 Layout Guidelines ................................................. 19
11.2 Layout Example .................................................... 19
12 Device and Documentation Support ................. 20
12.1 Trademarks ........................................................... 20
12.2 Electrostatic Discharge Caution ............................ 20
12.3 Glossary ................................................................ 20
13 Mechanical, Packaging, and Orderable
Information ........................................................... 20
5 Revision History
Changes from Original (March 2010) to Revision A
Page
• Changed the data sheet to the new TI format ....................................................................................................................... 1
• Added TA value to the Abs Max table .................................................................................................................................... 4
• Added the Handling Ratings table ......................................................................................................................................... 4
• Added TA value to the ROC table........................................................................................................................................... 4
• Added the Thermal Information table .................................................................................................................................... 5
• Changed the VVREG5 MIN value From: 4.8 V to 4.6 V ........................................................................................................... 5
• Changed the RDRVL MAX value for –100 mA From: 8 Ω To 12 Ω .......................................................................................... 5
• Changed the I(SSC) Min value From: -1.5 to -2.5 µA and the Max value From: -2.5 To: -1.5 µA............................................ 6
• Added the Timing Requirements table .................................................................................................................................. 6
• Added the Switching Characteristics table ............................................................................................................................. 6
• Added the Layout Example, Figure 28 ................................................................................................................................ 19
2 Submit Documentation Feedback
Product Folder Links: TPS53127
Copyright © 2010–2014, Texas Instruments Incorporated


Part Number TPS53127
Description Dual Synchronous Step-Down Controller
Maker etcTI
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