DC/DC Converter. TPS55332-Q1 Datasheet

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TPS55332-Q1 Datasheet
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Part TPS55332-Q1
Description Step Up DC/DC Converter
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TPS55332-Q1
SLVS939B – JUNE 2009 – REVISED DECEMBER 2014
TPS55332-Q1 2.2-MHz, 60-V Output Step Up DC/DC Converter
1 Features
1 Withstands Transients up to 60 V, Boost Input
Operating Range of 1.5 V to 40 V (VIN)
• Peak Internal Switch Current: 5.7 A (typ)
• 2.5 V ± 1.5% Feedback Voltage Reference
• 80 kHz to 2.2 MHz Switching Frequency
• High Voltage Tolerant Enable Input for On/Off
State
• Soft Start on Enable Cycle
• Slew Rate Control on Internal Power Switch
• External Clock Input for Synchronization
• External Compensation for Wide Bandwidth Error
Amplifier
• Programmable Power on Reset Delay
• Reset Function Filter Time for Fast Negative
Transients
• Programmable Undervoltage Output Monitoring,
Issuance of Reset if Output Falls Below Set
Threshold
• Thermal Shutdown to Protect Device During
Excessive Power Dissipation
• ILIM Threshold Protection (Current Limit)
• Operating Junction Temperature Range: –40°C to
150°C
• Thermally Enhanced 20-Pin HTSSOP
PowerPAD™ Package
2 Applications
• Lighting
• Battery Powered Applications
• Qualified for Automotive Applications
3 Description
The TPS55332 is a monolithic high-voltage switching
regulator with integrated 3-A, 60-V power MOSFET.
The device can be configured as a switch mode step-
up power supply with voltage supervisor. Once the
internal circuits have stabilized with a minimum input
supply of 3.6 V, the system can then have an input
voltage range from 1.5 V to 40 V, to maintain a fixed
boost output voltage. For optimum performance,
VIN/Vout ratios should be set such that the minimum
required duty cycle pulse > 150 ns. The supervisor
circuit monitors the regulated output and indicates
when this output voltage has fallen below the set
value. The TPS55332 has a switching frequency
range from 80 kHz to 2.2 MHz, allowing the use of
low profile inductors and low value input and output
capacitors. The external loop compensation gives the
user the flexibility to optimize the converter response
for the appropriate operating conditions. Using the
enable pin (EN), the shutdown supply current is
reduced to 1 μA. The device has built-in protection
features such soft start on enable cycle, pulse-by-
pulse current limit, and thermal sensing and
shutdown due to excessive power dissipation.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TPS55332
HTSSOP (20)
6.50 mm x 4.40 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
Simplified Schematic
Vsupply
VIN SW
EN
RT
Cdly
GND
SYNC
RST
GND
GND
SS
VReg
VSENSE
TPS55332
COMP
RST_TH
BOOT
Rslew
PGND
Vout
S0401-01
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 TPS55332-Q1
TPS55332-Q1
SLVS939B – JUNE 2009 – REVISED DECEMBER 2014
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 Typical Characteristics .............................................. 7
7 Detailed Description .............................................. 8
7.1 Overview ................................................................... 8
7.2 Functional Block Diagram ......................................... 8
7.3 Feature Description................................................... 9
7.4 Device Functional Modes........................................ 13
8 Application and Implementation ........................ 17
8.1 Application Information............................................ 17
8.2 Typical Application .................................................. 17
9 Power Supply Recommendations...................... 22
10 Layout................................................................... 23
10.1 Layout Guidelines ................................................. 23
10.2 Layout Example .................................................... 24
10.3 Power Dissipation ................................................. 26
11 Device and Documentation Support ................. 28
11.1 Trademarks ........................................................... 28
11.2 Electrostatic Discharge Caution ............................ 28
11.3 Glossary ................................................................ 28
12 Mechanical, Packaging, and Orderable
Information ........................................................... 28
4 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Revision A (June 2010) to Revision B
Page
• Added ESD Ratings table, Feature Description section, Device Functional Modes, Application and Implementation
section, Power Supply Recommendations section, Layout section, Device and Documentation Support section, and
Mechanical, Packaging, and Orderable Information section ................................................................................................. 4
Changes from Original (June 2009) to Revision A
Page
• Changed title from 0.5-A, 60-V STEP UP DC/DC CONVERTER to 2.2-MHz, 60-V OUTPUT STEP UP DC/DC
CONVERTER ......................................................................................................................................................................... 1
• Added Peak Internal Switch Current: 5.7 A (typ) to Features ................................................................................................ 1
• Deleted Asynchronous Switch Mode Regulator with External Components (L and C), Output up to 0.5 A (max) in
Boost Mode from Features ..................................................................................................................................................... 1
• Added fsw < fext < 2 × fsw to SYNC input clock test conditions ................................................................................................ 5
• Changed SYNC input clock max value from 1100 kHz to 2200 kHz ..................................................................................... 5
• Added Vout = 25.5V to test conditions ................................................................................................................................... 5
• Added Vout = 25.5V to test conditions ................................................................................................................................... 5
• Changed Output Voltage (Vout) description........................................................................................................................... 9
• Changed internal reference Vref from 2.5 V to 0.8 V ........................................................................................................... 12
• Added inductor saturation current Isat description................................................................................................................. 13
2 Submit Documentation Feedback
Copyright © 2009–2014, Texas Instruments Incorporated
Product Folder Links: TPS55332-Q1



Texas Instruments TPS55332-Q1
www.ti.com
5 Pin Configuration and Functions
TPS55332-Q1
SLVS939B – JUNE 2009 – REVISED DECEMBER 2014
PIN
NAME
NC
NC
SYNC
GND
EN
RT
Rslew
RST
Cdly
GND
SS
GND
RST_TH
VSENSE
COMP
VReg
PGND
SW
VIN
BOOT
NO.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
PWP Package
20 Pins
(Top View)
NC
NC
SYNC
GND
EN
RT
Rslew
RST
Cdly
GND
1
2
3
4
5
6
7
8
9
10
20 BOOT
19 VIN
18 SW
17 PGND
16 VReg
15 COMP
14 VSENSE
13 RST_TH
12 GND
11 SS
P0021-03
Pin Functions
I/O DESCRIPTION
NC Connect to ground
NC Connect to ground
I External synchronization clock input, 62-k(typ) pull-down resistor
I Connect to ground
I Enable input, high voltage tolerant
O Resistor to program internal oscillator frequency
O Internal switch programmable slew rate control
O Reset output open drain (active low)
O Reset delay timer (programmed by external capacitor)
O Analog ground, DVSS and SUB
O Programmable soft-start. (external capacitor)
I Connect to ground
I Input for RESET circuitry to detect undervoltage on output (adjustable threshold)
I Feedback input for voltage mode control
O Error amplifier output
I Internal low side FET to load output during start up or limit over shoot
O Power ground connection
I/O Switched drain output/input
I Unregulated input voltage
O Bootstrap capacitor pump
Copyright © 2009–2014, Texas Instruments Incorporated
Product Folder Links: TPS55332-Q1
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