TPS55332-Q1 Datasheet, PDF (1/29 Pages) Texas Instruments – 2.2-MHz, 60-V OUTPUT STEP UP DC/DC CONVERTER

www.ti.com
TPS55332-Q1
SLVS939A – JUNE 2009 – REVISED JUNE 2010
2.2-MHz, 60-V OUTPUT STEP UP DC/DC CONVERTER
Check for Samples: TPS55332-Q1
FEATURES
1
•2 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
APPLICATIONS
• Lighting
• Battery Powered Applications
• Qualified for Automotive Applications
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 mA. 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.
SIMPLIFIED SCHEMATIC
Vsupply
VIN
SW
EN
RT
C_dly
GND
SYNC
RST
GND
GND
SS
V_Reg
VSENSE
TPS55332
COMP
RST_TH
BOOT
R_slew
PGND
Vout
S0401-01
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.
PowerPAD is a trademark of Texas Instruments.
2
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 © 2009–2010, Texas Instruments Incorporated