LM78S40CN/NOPB National Semiconductor, LM78S40CN/NOPB Datasheet

LM78S40CN/NOPB

Manufacturer Part Number

LM78S40CN/NOPB

Description

IC MULTI CONFIG ADJ 1.5A 16DIP

Manufacturer

National Semiconductor

Type

Step-Down (Buck), Step-Up (Boost), Invertingr

Datasheets

1.LM78S40CNNOPB.pdf (10 pages)

2.LM78S40CNNOPB.pdf (4 pages)

Specifications of LM78S40CN/NOPB

Internal Switch(s)

Yes

Synchronous Rectifier

Number Of Outputs

Voltage - Output

1.25 ~ 40 V

Current - Output

1.5A

Frequency - Switching

100kHz

Voltage - Input

2.5 ~ 40 V

Operating Temperature

0°C ~ 70°C

Mounting Type

Through Hole

Package / Case

16-DIP (0.300", 7.62mm)

Power - Output

1.04W

Common Mode Rejection Ratio

Current, Input Bias

35 nA (Comparator), 30 nA (Operational Amplifier)

Current, Input Offset

5 nA

Current, Output

1.5 A

Current, Supply

2.3 mA

Package Type

DIP-16

Power Dissipation

1.04 W

Regulation, Line

0.04 mV/V

Regulation, Load

0.2 mV/mA

Regulator Type

Switching, Step-Up, Step-Down

Temperature, Operating, Range

-40 to +125 °C

Voltage, Input

2.5 to 40 V

Voltage, Offset

1.5 mV (Comparator), 4 mV (Operational Amplifier)

Voltage, Output

1.25 to 40 V

Voltage, Supply, Rejection Ratio

76 dB

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Other names

*LM78S40CN
*LM78S40CN/NOPB
78S40
LM78S40CN

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LM78S40

Universal Switching Regulator Subsystem

General Description

The LM78S40 is a monolithic regulator subsystem consisting

of all the active building blocks necessary for switching regu-

lator systems. The device consists of a temperature com-

pensated voltage reference, a duty-cycle controllable oscilla-

tor with an active current limit circuit, an error amplifier, high

current, high voltage output switch, a power diode and an

uncommitted operational amplifier. The device can drive ex-

ternal NPN or PNP transistors when currents in excess of

1.5A or voltages in excess of 40V are required. The device

can be used for step-down, step-up or inverting switching

regulators as well as for series pass regulators. It features

wide supply voltage range, low standby power dissipation,

high efficiency and low drift. It is useful for any stand-alone,

low part count switching system and works extremely well in

battery operated systems.

Block and Connection Diagrams

16-Lead DIP

Top View

Features

n Step-up, step-down or inverting switching regulators

n Output adjustable from 1.25V to 40V

n Peak currents to 1.5A without external transistors

n Operation from 2.5V to 40V input

n Low standby current drain

n 80 dB line and load regulation

n High gain, high current, independent op amp

n Pulse width modulation with no double pulsing

DS010057-1

DS010057-2

Related parts for LM78S40CN/NOPB

LM78S40CN/NOPB Summary of contents

Page 1

LM78S40 Universal Switching Regulator Subsystem General Description The LM78S40 is a monolithic regulator subsystem consisting of all the active building blocks necessary for switching regu- lator systems. The device consists of a temperature com- pensated voltage reference, a duty-cycle controllable ...

Page 2

... Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Storage Temperature Range Ceramic DIP Molded DIP Operating Temperature Range Extended (LM78S40J) Industrial (LM78S40N) Commercial (LM78S40CN) Lead Temperature Ceramic DIP (Soldering, 60 sec.) Molded DIP (Soldering, 10 sec ...

Page 3

LM78S40 Electrical Characteristics = Operating temperature range 5.0V Symbol Parameter OUTPUT SWITCH SECTION h Output Transistor Current FE Gain I Output Leakage Current L POWER DIODE V Forward Voltage Drop FD I Diode Leakage ...

Page 4

Physical Dimensions inches (millimeters) unless otherwise noted 16-Lead Ceramic Dual-In-Line Package (J) 16-Lead Molded Dual-In-Line Package (N) Order Number LM78S40N or LM78S40CN Order Number LM78S40J/883 NS Package Number J16A NS Package Number N16A 9 ...

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