Texas Instruments PTN78020A Data Sheet

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PTN78020A

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SLTS244A–APRIL 2005–REVISED MAY

25-W, WIDE-INPUT ADJUSTABLE POSITIVE-TO-NEGATIVE VOLTAGE

REGULATOR MODULE

FEATURES APPLICATIONS

4-A Output Current General-Purpose, Industrial Controls,•

HVAC Systems, Test and Measurement,•

Wide-Input Voltage

Medical Instrumentation, AC/DC Adaptors,(9

to V)

Vehicles, Marine, and Avionics

Wide-Output Voltage Adjust

(–15 to –3 V)

High Efficiency (Up to 87%)

Output Current Limit

Overtemperature Shutdown

Undervoltage Lockout

Operating Temperature: –40°C to 85°C

Surface-Mount Package Available

DESCRIPTION

The PTN78020A is series of high-efficiency buck-boost-integrated switching regulators (ISR), that represent the

third generation in the evolution of high-performance power modules designed for industrial use. The wide-input

voltage range makes these modules suitable for variety of applications that operate off 12–V, 24–V, and

tightly-regulated 28–V dc power. In new designs, they should be considered in place of the PT6640 and

PT78NR100 series of single in-line pin (SIP) products. The PTN78020A is smaller and lighter than its

predecessors, and has either similar or improved electrical performance characteristics. The caseless,

double-sided package has excellent thermal characteristics, and is compatible with TI's roadmap for Ro HS and

lead-free compliance.

The PTN78020A operates over an input voltage range of to V, and provides high-efficiency,

positive-to-negative voltage conversion for loads of up to A. The output voltage is set using single external

resistor, and may be adjusted to any value within the range, –15 to –3 V.

STANDARD APPLICATION

PTN78020A (Top View)

Electrolytic Ceramic RSET#

(Required)

(Required) (Required)

1 %, 0.05 W (Required)

GND GND

*See the for capacitor recommendation.Application Information #RSET is required to adjust the output voltage lower than -3 V. See the for values.Application Information

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. Copyright 2005, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.