www.ti.com

FEATURES

APPLICATIONS

DESCRIPTION

1

4

2

3

5

C2*

2 x 4.7 F

Ceramic

(Required)

m

C1*

100 F

Electrolytic

(Required)

m

C3*

100 F

Electrolytic

(Required)

m

GND

GND

PTN78000A

(Top View)

*See the

for capacitor recommendation.

Application Information

#R

for values.

Application Information

STANDARD APPLICATION

1 %, 0.05 W

(Required)

+

PTN78000A

SLTS246A – APRIL 2005 – REVISED MAY 2005

1.5-A, WIDE-INPUT ADJUSTABLE BUCK-BOOST SWITCHING REGULATOR

•

General-Purpose, Industrial Controls,

•

1.5-A Output Current

HVAC Systems, Test and Measurement,

•

Wide-Input Voltage

Medical Instrumentation, AC/DC Adaptors,

(7 V to 29 V)

Vehicles, Marine, and Avionics

•

Wide-Output Voltage Adjust

(–15 V to –3 V)

•

High Efficiency (Up to 84%)

•

Output Current Limit

•

Overtemperature Shutdown

•

Operating Temperature: –40°C to 85°C

•

Surface-Mount Package Available

The PTN78000A is a series of high-efficiency, buck-boost integrated switching regulators (ISR), that represent

the third generation in the evolution of the PT78NR100 series of products. In new designs, it should be

considered in place of the PT78NR100 series of single in-line pin (SIP) products. The PTN78000A is smaller and

lighter than its predecessor, and has either similar or improved electrical performance characteristics. 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, the PTN78000A provides high-efficiency, positive-to-negative voltage

conversion for loads of up to 1.5 A. The output voltage is set using a single external resistor, and may be set to

any value within the range, –15 V to –3 V.

The PTN78000A has undervoltage lockout, and is suited to a wide variety of general-purpose applications that

operate off 12-V, 24-V, or tightly regulated 28-V dc power.

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.