PTN04050A_15 Datasheet, PDF (1/19 Pages) Texas Instruments – 6-W, 3.3-V/5-V INPUT, WIDE ADJUST OUTPUT, POSITIVE-TO-NEGATIVE CONVERTER

PTN04050A
www.ti.com
SLTS250 – SEPTEMBER 2005
6-W, 3.3-V/5-V INPUT, WIDE ADJUST OUTPUT, POSITIVE-TO-NEGATIVE CONVERTER
FEATURES
• Up to 6-W Output Power
• Wide-Input Voltage
(2.9 V to 7 V)
• Wide-Output Voltage Adjust
(–15 V to –3.3 V)
• High Efficiency (Up to 84%)
• On/Off Inhibit
• Output Current Limit
• Undervoltage Lockout
• Overtemperature Shutdown
• Operating Temperature: –40°C to 85°C
• Surface-Mount Package Available
APPLICATIONS
• General-Purpose, Industrial Controls,
HVAC Systems, Test and Measurement,
Medical Instrumentation, AC/DC Adaptors,
Vehicles, Marine, and Avionics
DESCRIPTION
The PTN04050A is an adjustable output, positive-to-negative, integrated switching regulator. In new designs, it
should be considered in place of the PT5020 series of positive-to-negative integrated switching regulator
products. The PTN04050A is smaller and lighter than its predecessor, with improved electrical performance
characteristics, while operating over a wider input voltage range, with an adjustable output voltage. The
caseless, double-sided package also exhibits improved thermal characteristics, and is compatible with TI's
roadmap for RoHS and lead-free compliance.
Operating from a wide-input voltage range of 2.9 V to 7 V, the PTN04050A provides high-efficient,
positive-to-negative voltage conversion for loads of up to 6 W. The output voltage is set using a single external
resistor, and may be set to any value within the range, –15 V to –3.3 V.
The PTN04050A features include on/off inhibit, undervoltage lockout, over-current protection, and is suited for a
wide variety of general-purpose applications that operate off 3.3-V or 5-V input.
STANDARD APPLICATION
1
V_I
2
INH
3
(1)
C1
100 mF +
Electrolytic
(Required)
PTN04050A
(Top View)
5
4
(2)
R_SET
1 %, 0.05 W
(Required)
-V_O
(1)
C3
100 mF
+ _Electrolytic
(Required)
GND
GND
(1) See the Application Information for capacitor recommendations.
(2) R_SET is required to adjust the output voltage. See the Application Information for values.
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.
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 © 2005, Texas Instruments Incorporated