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FEATURES

DESCRIPTION

APPLICATIONS

STANDARD APPLICATION

PTN78000

(Top View)

1

1

2

3

5

4

+

R

SET

(B)

0.05 W, 1 %

(Required)

C

I

(A)

Ceramic

(Required)

C

O

(A)

100 mF

Electrolytic

(Required)

V

O

GND

V

I

Inhibit

GND

PTN78000W, PTN78000H

1.5-A, WIDE-INPUT ADJUSTABLE SWITCHING REGULATOR

• 1.5-A Output Current

• Wide-Input Voltage

The

PTN78000

is

a

series

of

high-efficiency,

step-down Integrated Switching Regulators (ISR),

(7 V to 36 V) / (15 V to 36 V)

that represent the third generation in the evolution of

• Wide-Output Voltage Adjust

the popular 78ST100 series of products. In new

(2.5 V to 12.6 V) / (11.85 V to 22 V)

designs it should be considered in place of the

• High Efficiency (Up to 95%)

78ST100, PT78ST100, PT5100, and PT6100 series

of single in-line pin (SIP) products. The PTN78000 is

• On/Off Inhibit

smaller and lighter than its predecessors, and has

• Undervoltage Lockout

either similar or improved electrical performance

• Output Current Limit

characteristics. The case-less, double-sided package,

also exhibits improved thermal characteristics, and is

• Overtemperature Shutdown

compatible with TI's roadmap for RoHS and lead-free

• Operating Temperature: –40°C to 85°C

compliance.

• Surface Mount Package Available

Operating from a wide-input voltage range, the

PTN78000

provides

high-efficiency,

step-down

voltage conversion for loads of up to 1.5 A. The

• General-Purpose, Industrial Controls,

output voltage is set using a single external resistor.

HVAC Systems, Test and Measurement,

The PTN78000W may be set to any value within the

Medical Instrumentation, AC/DC Adaptors,

range, 2.5 V to 12.6 V, and the PTN78000H from

Vehicles, Marine, and Avionics

11.85 V to 22 V. The output voltage of the

PTN78000W can be as little as 2 V lower than the

input, allowing operation down to 7 V, with an output

voltage of 5 V. The output voltage of the PTN78000H

can be as little as 3 V lower than the input, alowing

operation down to 15 V, with an output voltage of

12 V.

The PTN78000 has undervoltage lockout and an

integral on/off inhibit. The modules are suited to a

wide variety of general-purpose applications that

(A) See the Application Information section for

capacitor

recommendations.

The

minimum

input

capacitance is 2.2

µF for PTN78000W, and 9.4 µF (2

x 4.7

µF) for PTN78000H.

higher than 2.5 V for PTN78000W, and high than

11.824 V for PTN78000H. See the Application

Information section for specific values.

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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 © 2004–2008, 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.