LM2585S-ADJ/NOPB National Semiconductor, LM2585S-ADJ/NOPB Datasheet

LM2585S-ADJ/NOPB

Manufacturer Part Number

LM2585S-ADJ/NOPB

Description

IC MULTI CONFIG ADJ 3A TO263-5

Manufacturer

National Semiconductor

Series

SIMPLE SWITCHER®r

Type

Step-Up (Boost), Flyback, Forward Converterr

Datasheets

1.LM2585T-ADJNOPB.pdf (28 pages)

2.LM2585S-ADJNOPB.pdf (6 pages)

Specifications of LM2585S-ADJ/NOPB

Internal Switch(s)

Yes

Synchronous Rectifier

Number Of Outputs

Voltage - Output

Adjustable

Current - Output

Frequency - Switching

100kHz

Voltage - Input

4 ~ 40 V

Operating Temperature

-40°C ~ 125°C

Mounting Type

Surface Mount

Package / Case

D²Pak, TO-263 (5 leads + tab)

Current, Input Bias

126 nA

Current, Output

3 A

Current, Supply

11 mA

Frequency, Oscillator

100 kHz

Package Type

TO-263

Regulation, Line

20 mV

Regulation, Load

20 mV

Regulator Type

Boost (Step-Up)

Resistance, Thermal, Junction To Case

2 °C/W

Temperature, Operating, Range

-40 to +125 °C

Transconductance

3.2

Voltage, Gain

670 V/V

Voltage, Input

4 to 40 V

Primary Input Voltage

40V

No. Of Outputs

Output Voltage

37V

Output Current

No. Of Pins

Operating Temperature Range

-40Â°C To +125Â°C

Msl

MSL 3 - 168 Hours

Filter Terminals

SMD

Rohs Compliant

Yes

For Use With

551011367-061 - BOARD WEBENCH LM2577,LM2585/87

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Power - Output

Lead Free Status / Rohs Status

RoHS Compliant part Electrostatic Device

Other names

*LM2585S-ADJ
*LM2585S-ADJ/NOPB
LM2585S-ADJ

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

LM2585S-ADJ/NOPB

Manufacturer:

Quantity:

15 000

Current page: 1 of 6
Download datasheet (339Kb)

LM2585

SIMPLE SWITCHER

General Description

The LM2585 series of regulators are monolithic integrated

circuits specifically designed for flyback, step-up (boost), and

forward converter applications. The device is available in 4

different output voltage versions: 3.3V, 5.0V, 12V, and ad-

justable.

Requiring a minimum number of external components, these

regulators are cost effective, and simple to use. Included in

the datasheet are typical circuits of boost and flyback regula-

tors. Also listed are selector guides for diodes and capacitors

and a family of standard inductors and flyback transformers

designed to work with these switching regulators.

The power switch is a 3.0A NPN device that can stand-off

65V. Protecting the power switch are current and thermal lim-

iting circuits, and an undervoltage lockout circuit. This IC

contains a 100 kHz fixed-frequency internal oscillator that

permits the use of small magnetics. Other features include

soft start mode to reduce in-rush current during start up, cur-

rent mode control for improved rejection of input voltage and

output load transients and cycle-by-cycle current limiting. An

output voltage tolerance of ±4%, within specified input volt-

ages and output load conditions, is guaranteed for the power

supply system.

Connection Diagrams

SIMPLE SWITCHER

Order Number LM2585S-3.3, LM2585S-5.0,

LM2585S-12 or LM2585S-ADJ

is a registered trademark of National Semiconductor Corporation

Bent, Staggered Leads

5-Lead TO-263 (S)

5-Lead TO-220 (T)

Top View

Order Number LM2585T-3.3, LM2585T-5.0,

1251516

1251514

See NS Package Number T05D

3A Flyback Regulator

LM2585T-12 or LM2585T-ADJ

Features

■

Typical Applications

■

Requires few external components

Family of standard inductors and transformers

NPN output switches 3.0A, can stand off 65V

Wide input voltage range: 4V to 40V

Current-mode operation for improved transient response,

line regulation, and current limit

100 kHz switching frequency

Internal soft-start function reduces in-rush current during

start-up

Output transistor protected by current limit, under voltage

lockout, and thermal shutdown

System Output Voltage Tolerance of ±4% max over line

and load conditions

Flyback regulator

Multiple-output regulator

Simple boost regulator

Forward converter

See NS Package Number TS5B

Bent, Staggered Leads

5-Lead TO-263 (S)

5-Lead TO-220 (T)

Side View

1251517

1251515

Related parts for LM2585S-ADJ/NOPB

LM2585S-ADJ/NOPB Summary of contents

Page 1

... Connection Diagrams Bent, Staggered Leads 5-Lead TO-220 (T) Top View 5-Lead TO-263 (S) Top View Order Number LM2585S-3.3, LM2585S-5.0, LM2585S-12 or LM2585S-ADJ SIMPLE SWITCHER ® registered trademark of National Semiconductor Corporation ® 3A Flyback Regulator Features ■ ...

Page 2

... Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Input Voltage Switch Voltage Switch Current (Note 2) Compensation Pin Voltage Feedback Pin Voltage Storage Temperature Range Lead Temperature (Soldering, 10 sec.) Electrical Characteristics LM2585-3 ...

Page 3

Symbol Parameters ΔV Reference Voltage V REF Line Regulation G Error Amp I M Transconductance V A Error Amp V VOL Voltage Gain R LM2585-12 Symbol Parameters SYSTEM PARAMETERS Test Circuit of Figure 3 (Note 4) V Output Voltage V ...

Page 4

Symbol Parameters I Error Amp V B Input Bias Current Electrical Characteristics (All Versions) Symbol Parameters COMMON DEVICE PARAMETERS for all versions (Note 5) I Input Supply (Switch Off) S Current (Note 8) I SWITCH V Input Supply R UV ...

Page 5

Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating ratings indicate conditions the device is intended to be functional, but device parameter specifications may not be guaranteed under these conditions. For guaranteed specifications ...

Page 6

... Order Number LM2585S-3.3, LM2585S-5.0, LM2585S-12 or LM2585S-ADJ NS Package Number TS5B 27 ...

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