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TPS54295 Datasheet Preview

TPS54295 Datasheet

2-A Dual Channel Synchronous Step-Down Switcher

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TPS54295
SLVSB01D – OCTOBER 2011 – REVISED AUGUST 2016
TPS54295 2-A Dual Channel Synchronous Step-Down Switcher With Integrated FET
1 Features
1 D-CAP2™ Control Mode
– Fast Transient Response
– No External Parts Required For Loop
Compensation
– Compatible With Ceramic Output Capacitors
• Wide Input Voltage Range : 4.5 V to 18 V
• Output Voltage Range : 0.76 V to 7 V
• Highly Efficient Integrated FETs Optimized for
Low Duty Cycle Applications
– 150 m(High-Side) and 100 m(Low-Side)
• High Initial Reference Accuracy
• Low-Side rDS(ON) Lossless Current Sensing
• Adjustable Soft Start
• Non-Sinking Prebiased Soft Start
• 700-kHz Switching Frequency
• Cycle-by-Cycle Overcurrent Limit Control
• OCL, OVP, UVP, UVLO, and TSD Protections
• Adaptive Gate Drivers With Integrated Boost
PMOS Switch
• OCP Constant Due to Thermally Compensated
rDS(ON) With 4000 ppm/
• 16-Pin HTSSOP, 16-pin VQFN
• Auto-Skip Eco-mode™ for High Efficiency at Light
Load
2 Applications
• Point-of-Load Regulation in Low Power Systems
for Wide Range of Applications
– Digital TV Power Supplies
– Networking Home Terminals
– Digital Set Top Boxes (STB)
– DVD Players and Recorders
– Gaming Consoles and Other
3 Description
The TPS54295 is a dual, adaptive on-time D-CAP2
mode synchronous buck converter. The TPS54295
enables system designers to complete the suite of
various end-equipment power bus regulators with a
cost effective, low component count, and low standby
current solution. The main control loops of the
TPS54295 use the D-CAP2 mode control which
provides a very fast transient response with no
external compensation components. The adaptive on-
time control supports seamless transition between
PWM mode at higher load conditions and Eco-mode
operation at light loads. Eco-mode allows the
TPS54295 to maintain high efficiency during lighter
load conditions. The TPS54295 is able to adapt to
both low equivalent series resistance (ESR) output
capacitors such as POSCAP or SP-CAP, and ultra-
low ESR ceramic capacitors. The device provides
convenient and efficient operation with input voltages
from 4.5 V to 18 V.
The TPS54295 is available in a 4.4 mm × 5 mm 16-
pin HTSSOP (PWP) package and 4 mm x 4 mm 16-
pin VQFN (RSA) package, designed to operate at an
ambient temperature range from –40°C to 85°C.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TPS54295
HTSSOP (16)
VQFN (16)
5.00 mm × 4.40 mm
4.00 mm × 4.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Load Transient Response
VO2 = 1.5 V (50 mV/div)
Iout (1 A/div)
t - Time - 100 ms/div
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.




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TPS54295 Datasheet Preview

TPS54295 Datasheet

2-A Dual Channel Synchronous Step-Down Switcher

No Preview Available !

TPS54295
SLVSB01D – OCTOBER 2011 – REVISED AUGUST 2016
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Revision History..................................................... 2
5 Pin Configuration and Functions ......................... 4
6 Specifications......................................................... 5
6.1 Absolute Maximum Ratings ...................................... 5
6.2 ESD Ratings.............................................................. 5
6.3 Recommended Operating Conditions....................... 5
6.4 Thermal Information .................................................. 6
6.5 Electrical Characteristics........................................... 6
6.6 Typical Characteristics .............................................. 8
7 Detailed Description ............................................ 11
7.1 Overview ................................................................. 11
7.2 Functional Block Diagram ....................................... 12
7.3 Feature Description................................................. 13
7.4 Device Functional Modes........................................ 14
8 Application and Implementation ........................ 15
8.1 Application Information............................................ 15
8.2 Typical Application .................................................. 15
9 Power Supply Recommendations...................... 19
10 Layout................................................................... 19
10.1 Layout Guidelines ................................................. 19
10.2 Layout Example .................................................... 20
10.3 Thermal Considerations ........................................ 22
11 Device and Documentation Support ................. 23
11.1 Device Support...................................................... 23
11.2 Documentation Support ........................................ 23
11.3 Receiving Notification of Documentation Updates 23
11.4 Community Resources.......................................... 23
11.5 Trademarks ........................................................... 23
11.6 Electrostatic Discharge Caution ............................ 23
11.7 Glossary ................................................................ 23
12 Mechanical, Packaging, and Orderable
Information ........................................................... 23
4 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Revision C (April 2013) to Revision D
Page
• Added Device Information table, Specifications section, ESD Ratings table, Detailed Description section, Application
and Implementation section, Power Supply Recommendations section, Layout section, Device and Documentation
Support section, and Mechanical, Packaging, and Orderable Information section................................................................ 1
• Deleted Ordering Information table; see POA at the end of the data sheet........................................................................... 1
• Deleted Operating ambient temperature from Absolute Maximum Ratings table .................................................................. 5
• Deleted Operating ambient temperature from Recommended Operating Conditions table................................................... 5
• Changed Operating junction temperature maximum value from 150 to 125 in Recommended Operating Conditions table 5
Changes from Revision B (December 2011) to Revision C
Page
• Added the RSA-16 Pin package to the Ordering Information table........................................................................................ 1
• Changed the Description text to include the RSA package ................................................................................................... 1
• Added the RSA-16 Pin package pin out................................................................................................................................. 4
• Added Figure 26 ................................................................................................................................................................... 21
Changes from Revision A (October 2011) to Revision B
Page
• Deleted MIN and MAX values from VVREG5 specification........................................................................................................ 6
• Deleted Line and Load regulation specs from VREG5 specification ......................................................................................... 6
• Added "Ensured by design. Not production tested" annotation to specifications for MOSFETs, ON-TIME TIMER
CONTROl, and SOFT START................................................................................................................................................ 6
• Deleted MIN and MAX values from VUVREG5 specification...................................................................................................... 6
• Added "VIN = 12 V, TA = 25°C (unless otherwise noted)" to Typical Characteristics conditions statement. ......................... 8
2
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Part Number TPS54295
Description 2-A Dual Channel Synchronous Step-Down Switcher
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