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LM2599 Product Folder

SIMPLE SWITCHER Power Converter 150 KHz 3A Step-Down Voltage Regulator with Features

Generic P/N 2599

General
Description

Package
& Models

Samples
& Pricing

Reliability
Metrics

Application
Notes

WEBENCH Live Simulation!

LM2599 Webench™ Custom Design/Analyze/Build It
4.5 <=	V in Lower V	<=	V in Upper V	<= 40.0
V out	1.2 <=		V	<= 40.0
I out			A	<= 3.00
Ambient Temperature			°C	<= 100
What is Webench?

Parametric Table

Temperature Min (deg C)	-40
Temperature Max (deg C)	125
Multiple Output Capability	No
On/Off Pin	Yes
Error Flag	Yes
InputMin Voltage (Volt)	15, 4.75, 7, 4.50
InputMax Voltage (Volt)	40
Output Current (mA)	3000
Output Voltage (Volt)	12, 3.30, 5
Adjustable Output	No, Yes
Output Range	1.2V-37V
Switching Frequency (Hz)	150000
Adj Switch Frequency	No
Sync Pin	No
Efficiency (%)	90
Flyback	No
Inverting	Yes
Step-Up	No
Step-Down	Yes
RegType	Switching Regulator

-

Datasheet

Title	Size in Kbytes	Date	View Online	Download	Receive via Email
LM2599 SIMPLE SWITCHER Power Converter 150 kHz 3A Step-Down Voltage Regulator, with Features	815 Kbytes	23-Jan-01	View Online	Download	Receive via Email
LM2599 SIMPLE SWITCHER Power Converter 150 kHz 3A Step-Down Voltage Regulator, with Features (JAPANESE)	1168 Kbytes

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Package Availability, Models, Samples & Pricing

Part Number

Package

Status

Models

Samples &
Electronic
Orders

Budgetary Pricing

Std
Pack
Size

Package
Marking

Type

Pins

MSL/Lead-Free Availability

Lead
Time

Qty

SPICE

IBIS

Qty

$US each

LM2599T-12

7

Full production

N/A

N/A

1K+

$2.16

rail
of
45

NSUZXYTT
LM2599T
-12 P+

9-11 weeks

25000

LM2599T-3.3

7

Full production

N/A

N/A

1K+

$2.16

rail
of
45

NSUZXYTT
LM2599T
-3.3 P+

8-10 weeks

25000

LM2599T-5.0

7

Full production

N/A

N/A

1K+

$2.16

rail
of
45

NSUZXYTT
LM2599T
-5.0 P+

9-11 weeks

10000

LM2599T-ADJ

7

Full production

N/A

N/A

1K+

$2.16

rail
of
45

NSUZXYTT
LM2599T
-ADJ P+

8-10 weeks

25000

LM2599S-12

7

Full production

N/A

N/A

1K+

$2.16

rail
of
45

NSUZXYTT
LM2599S
-12 P+

10-12 weeks

25000

LM2599S-3.3

7

Full production

N/A

N/A

1K+

$2.16

rail
of
45

NSUZXYTT
LM2599S
-3.3 P+

8-10 weeks

25000

LM2599S-5.0

7

Full production

N/A

N/A

1K+

$2.16

rail
of
45

NSUZXYTT
LM2599S
-5.0 P+

8-10 weeks

25000

LM2599S-ADJ

7

Full production

N/A

N/A

1K+

$2.16

rail
of
45

NSUZXYTT
LM2599S
-ADJ P+

8-10 weeks

25000

LM2599SX-5.0

7

Full production

N/A

N/A

1K+

$2.16

reel
of
500

NSUZXYTT
LM2599S
-5.0 P+

N/A

LM2599SX-12

7

Full production

N/A

N/A

1K+

$2.16

reel
of
500

NSUZXYTT
LM2599S
-12 P+

10-12 weeks

25000

LM2599SX-3.3

7

Full production

N/A

N/A

1K+

$2.16

reel
of
500

NSUZXYTT
LM2599S
-3.3 P+

8-10 weeks

50000

LM2599SX-ADJ

7

Full production

N/A

N/A

1K+

$2.16

reel
of
500

NSUZXYTT
LM2599S
-ADJ P+

3-6 weeks

50000

LM2599-3.3 MDC

Full production

N/A

N/A

tray
of
N/A

-

N/A

0

LM2599-5.0 MDC

Full production

N/A

N/A

tray
of
N/A

-

N/A

0

LM2599-ADJ MDC

Full production

N/A

N/A

tray
of
N/A

-

N/A

0

LM2599-3.3 MWC

Full production

N/A

N/A

wafer jar
of
N/A

-

N/A

0

LM2599-5.0 MWC

Full production

N/A

N/A

wafer jar
of
N/A

-

N/A

0

LM2599-ADJ MWC

Full production

N/A

N/A

wafer jar
of
N/A

-

N/A

0

General Description

The LM2599 series of regulators are monolithic integrated circuits that provide all the active functions for a step-down (buck) switching regulator, capable of driving a 3A load with excellent line and load regulation. These devices are available in fixed output voltages of 3.3V, 5V, 12V, and an adjustable output version.

This series of switching regulators is similar to the LM2596 series, with additional supervisory and performance features added.

Requiring a minimum number of external components, these regulators are simple to use and include internal frequency compensation†, improved line and load specifications, fixed-frequency oscillator, Shutdown#/Soft-start, error flag delay and error flag output.

The LM2599 series operates at a switching frequency of 150 kHz thus allowing smaller sized filter components than what would be needed with lower frequency switching regulators. Available in a standard 7-lead TO-220 package with several different lead bend options, and a 7-lead TO-263 Surface mount package.

A standard series of inductors (both through hole and surface mount types) are available from several different manufacturers optimized for use with the LM2599 series. This feature greatly simplifies the design of switch-mode power supplies.

Other features include a guaranteed ±4% tolerance on output voltage under all conditions of input voltage and output load conditions, and ±15% on the oscillator frequency. External shutdown is included, featuring typically 80 µA standby current. Self protection features include a two stage current limit for the output switch and an over temperature shutdown for complete protection under fault conditions.

Features

3.3V, 5V, 12V, and adjustable output versions
Adjustable version output voltage range, 1.2V to 37V ±4% max over line and load conditions
Guaranteed 3A output current
Available in 7-pin TO-220 and TO-263 (surface mount) Package
Input voltage range up to 40V
150 kHz fixed frequency internal oscillator
Shutdown#/Soft-start
Out of regulation error flag
Error output delay
Low power standby mode, I_Q typically 80 µA
High Efficiency
Uses readily available standard inductors
Thermal shutdown and current limit protection

Applications

Simple high-efficiency step-down (buck) regulator
Efficient pre-regulator for linear regulators
On-card switching regulators
Positive to Negative converter

Reliability Metrics

Part Number	Process	Early Failure Rate - Rejects	Sample Size (EFR)	PPM *	Rel. Rejects	Device Hours	Long Term Failure Rates (FITS)	MTTF
LM2599-3.3 MDC	LB300	0	17700	0	0	1100000	4	311012542
LM2599-3.3 MWC	LB300	0	17700	0	0	1100000	4	311012542
LM2599-5.0 MDC	LB300	0	17700	0	0	1100000	4	311012542
LM2599-5.0 MWC	LB300	0	17700	0	0	1100000	4	311012542
LM2599-ADJ MDC	LB300	0	17700	0	0	1100000	4	311012542
LM2599-ADJ MWC	LB300	0	17700	0	0	1100000	4	311012542
LM2599S-12	LB300	0	17700	0	0	1100000	4	311012542
LM2599S-3.3	LB300	0	17700	0	0	1100000	4	311012542
LM2599S-5.0	LB300	0	17700	0	0	1100000	4	311012542
LM2599S-ADJ	LB300	0	17700	0	0	1100000	4	311012542
LM2599SX-12	LB300	0	17700	0	0	1100000	4	311012542
LM2599SX-3.3	LB300	0	17700	0	0	1100000	4	311012542
LM2599SX-5.0	LB300	0	17700	0	0	1100000	4	311012542
LM2599SX-ADJ	LB300	0	17700	0	0	1100000	4	311012542
LM2599T-12	LB300	0	17700	0	0	1100000	4	311012542
LM2599T-3.3	LB300	0	17700	0	0	1100000	4	311012542
LM2599T-5.0	LB300	0	17700	0	0	1100000	4	311012542
LM2599T-ADJ	LB300	0	17700	0	0	1100000	4	311012542

For more information on Reliablitity Metrics, please click here.

Design Tools

Title	Size in Kbytes	Date	View Online	Download	Receive via Email
SimpleSwitcher® DC-DC Converters Design Software	9 Kbytes	28-Jul-2003	View

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Application Notes

Title	Size in Kbytes	Date	View Online	Download	Receive via Email
AN-1061: Application Note 1061 Power Conversion in Line-Powered Equipment	188 Kbytes	1-Oct-02	View Online	Download	Receive via Email
AN-1149: Application Note 1149 Layout Guidelines for Switching Power Supplies	113 Kbytes	26-Sep-02	View Online	Download	Receive via Email
AN-1229: Application Note 1229 SIMPLE SWITCHER PCB Layout Guidelines	229 Kbytes	1-Oct-02	View Online	Download	Receive via Email
AN-1246: Application Note 1246 Stresses in Wide Input DC-DC Converters	272 Kbytes	26-Sep-02	View Online	Download	Receive via Email
AN-556: Application Note 556 Introduction to Power Supplies	159 Kbytes	25-Sep-02	View Online	Download	Receive via Email

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[Information as of 15-Jan-2004]