DC-DC Converter. TPS54335-1A Datasheet

TPS54335-1A Converter. Datasheet pdf. Equivalent

TPS54335-1A Datasheet
Recommendation TPS54335-1A Datasheet
Part TPS54335-1A
Description Step-Down DC-DC Converter
Feature TPS54335-1A; Product Folder Sample & Buy Technical Documents Tools & Software Support & Community TPS54335A,.
Manufacture etcTI
Datasheet
Download TPS54335-1A Datasheet




Texas Instruments TPS54335-1A
Product
Folder
Sample &
Buy
Technical
Documents
Tools &
Software
Support &
Community
TPS54335A, TPS54335-1A, TPS54336A
SLVSCD5D – NOVEMBER 2014 – REVISED FEBRUARY 2016
TPS5433xA 4.5-V to 28-V Input, 3-A Output, Synchronous
Step-Down DC-DC Converter
1 Features
1 Synchronous 128-mΩ and 84-mΩ MOSFETs for
3-A Continuous Output Current
• TPS54335A: Internal 2-ms Soft-Start,
50-kHz to 1.5-MHz Adjustable Frequency
• TPS54336A: Adjustable Soft-Start,
Fixed 340-kHz Frequency
• Low 2-µA Shutdown, Quiescent Current
• 0.8-V Voltage Reference with ±0.8% Accuracy
• Current Mode Control
• Monotonic Startup into Pre-Biased Outputs
• Pulse Skipping for Light-Load Efficiency
• Hiccup Mode Overcurrent Protection
• Thermal Shutdown (TSD) and
Overvoltage Transition Protection
• 8-Pin SO PowerPAD™ and 10-Pin VSON
Package
• Create a Custom Design Using the TPS54335A
with the WEBENCH Power Designer
2 Applications
• Consumer Applications such as a Digital TV
(DTV), Set Top Box (STB, DVD/Blu-ray Player),
LCD Display, CPE (Cable Modem, WiFi Router),
DLP Projectors, Smart Meters
• Battery Chargers
• Industrial and Car Audio Power Supplies
• 5-V, 12-V, and 24-V Distributed Power Bus Supply
3 Description
The TPS5433xA family of devices are synchronous
converters with an input-voltage range of 4.5 V to 28
V. These devices include This device has an
integrated low-side switching FET that eliminates the
need for an external diode which reduces component
count.
Efficiency is maximized through the integrated 128-
mΩ and 84-mΩ MOSFETs, low IQ and pulse skipping
at light loads. Using the enable pin, the shutdown
supply current is reduced to 2 μA. This step-down
(buck) converter provides accurate regulation for a
variety of loads with a well-regulated voltage
reference that is 1.5% over temperature.
Cycle-by-cycle current limiting on the high-side
MOSFET protects the TPS5433xA family of devices
in overload situations and is enhanced by a low-side
sourcing current limit which prevents current
runaway. A low-side sinking current-limit turns off the
low-side MOSFET to prevent excessive reverse
current. Hiccup protection is triggered if the
overcurrent condition continues for longer than the
preset time. Thermal shutdown disables the device
when the die temperature exceeds the threshold and
enables the device again after the built-in thermal
hiccup time.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TPS54335A
TPS54336A
TPS54335-1A
SO PowerPAD (8)
VSON (10)
VSON (10)(2)
4.89 mm × 3.90 mm
3.00 mm × 3.00 mm
3.00 mm × 3.00 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
(2) The DRC package for the TPS54335-1A device has a
narrower heat-pad for more clearance between the pins and
heat pad. See the Differences Between the Two DRC
Packages section.
Simplified Schematic
VIN
C1
VIN
TPS54335A
EN
BOOT
PH
RT
COMP
CC
R RT C 2 R C
VSENSE
GND
C BOOT
LO
CO
VOUT
R O1
R O2
VIN
C1
VIN
TPS54336A
EN
SS
COMP
BOOT
PH
C BOOT
LO
CO
CC
C2
RC
C SS
VSENSE
GND
VOUT
R O1
R O2
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.



Texas Instruments TPS54335-1A
TPS54335A, TPS54335-1A, TPS54336A
SLVSCD5D – NOVEMBER 2014 – REVISED FEBRUARY 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 ......................... 3
6 Specifications......................................................... 4
6.1 Absolute Maximum Ratings ..................................... 4
6.2 ESD Ratings.............................................................. 4
6.3 Recommended Operating Conditions....................... 4
6.4 Thermal Information .................................................. 5
6.5 Electrical Characteristics........................................... 5
6.6 Timing Requirements ................................................ 6
6.7 Switching Characteristics .......................................... 6
6.8 Typical Characteristics .............................................. 7
7 Detailed Description ............................................ 10
7.1 Overview ................................................................. 10
7.2 Functional Block Diagram ....................................... 11
7.3 Feature Description................................................. 11
7.4 Device Functional Modes........................................ 21
8 Application and Implementation ........................ 22
8.1 Application Information............................................ 22
8.2 Typical Applications ................................................ 23
9 Power Supply Recommendations...................... 38
10 Layout................................................................... 39
10.1 Layout Guidelines ................................................. 39
10.2 Layout Example .................................................... 39
11 Device and Documentation Support ................. 40
11.1 Custom Design with WEBENCH Tools................. 40
11.2 Receiving Notification of Documentation Updates 40
11.3 Device Support...................................................... 40
11.4 Documentation Support ........................................ 40
11.5 Related Links ........................................................ 40
11.6 Community Resource............................................ 40
11.7 Trademarks ........................................................... 41
11.8 Electrostatic Discharge Caution ............................ 41
11.9 Glossary ................................................................ 41
12 Mechanical, Packaging, and Orderable
Information ........................................................... 41
4 Revision History
Changes from Revision C (March 2015) to Revision D
Page
• Deleted SWIFT™ from the data sheet title............................................................................................................................. 1
Changes from Revision B (August 2015) to Revision C
Page
• Added the TPS54335-1A device to the data sheet ............................................................................................................... 1
Changes from Revision A (December 2014) to Revision B
Page
• Deleted Selective Disclosure statement from data sheet and added the Related Links section ........................................... 1
• Changed the Device Functional Modes section .................................................................................................................. 21
• Changed the Power Supply Recommendations section ..................................................................................................... 38
Changes from Original (November 2014) to Revision A
Page
• Changed the device status from Production Preview to Production Data.............................................................................. 1
2
Submit Documentation Feedback
Copyright © 2014–2016, Texas Instruments Incorporated
Product Folder Links: TPS54335A TPS54335-1A TPS54336A



Texas Instruments TPS54335-1A
www.ti.com
5 Pin Configuration and Functions
DDA Package
8-Pin SO PowerPAD
TPS54335A Top View
BOOT
VIN
PH
GND
1
8
2
7
PowerPAD
3
6
4
5
RT
EN
COMP
VSENSE
DRC Package
10-Pin VSON With Exposed Thermal Pad
TPS54335A and TPS54335-1A Top View
VIN 1
PH 2
GND 3
GND 4
GND 5
Exposed
Thermal
Pad
10 RT
9 BOOT
8 EN
7 COMP
6 VSENSE
TPS54335A, TPS54335-1A, TPS54336A
SLVSCD5D – NOVEMBER 2014 – REVISED FEBRUARY 2016
DDA Package
8-Pin SO PowerPAD
TPS54336A Top View
BOOT
VIN
PH
GND
1
8
2
7
PowerPAD
3
6
4
5
SS
EN
COMP
VSENSE
DRC Package
10-Pin VSON With Exposed Thermal Pad
TPS54336A Top View
VIN 1
PH 2
GND 3
GND 4
GND 5
Exposed
Thermal
Pad
10 SS
9 BOOT
8 EN
7 COMP
6 VSENSE
NAME
BOOT
PIN
SO
PowerPAD
VSON
1
9
COMP
6
7
EN
7
8
GND
4
3
GND
4
4
GND
4
5
PH
3
2
RT (TPS54335A
and TPS54335-1A)
8
10
SS (TPS54336A)
8
10
VIN
2
1
VSENSE
5
6
PowerPAD (SO only)
Thermal pad (VSON only)
Table 1. Pin Functions
I/O
DESCRIPTION
A bootstrap capacitor is required between the BOOT and PH pins. If the voltage
O on this capacitor is below the minimum required by the output device, the output is
forced to switch off until the capacitor is refreshed.
O
This pin is the error-amplifier output and the input to the output switch-current
comparator. Connect frequency compensation components to this pin.
I This pin is the enable pin. Float the EN pin to enable.
— Ground
— Ground
— Ground
O The PH pin is the source of the internal high-side power MOSFET.
O
Connect the RT pin to an external timing resistor to adjust the switching frequency
of the device.
The SS pin is the soft-start and tracking pin. An external capacitor connected to
O this pin sets the internal voltage-reference rise time. The voltage on this pin
overrides the internal reference.
— This pin is the 4.5- to 28-V input supply voltage.
I This pin is the inverting node of the transconductance (gm) error amplifier.
— For proper operation, connect the GND pin to the exposed thermal pad. This
thermal pad should be connected to any internal PCB ground plane using multiple
vias for good thermal performance.
Copyright © 2014–2016, Texas Instruments Incorporated
Submit Documentation Feedback
3
Product Folder Links: TPS54335A TPS54335-1A TPS54336A







@ 2014 :: Datasheetspdf.com :: Semiconductors datasheet search & download site (Privacy Policy & Contact)