LM2622 - 600kHz/1.3MHz Step-up PWM DC/DC Converter

	LM2622 - 600kHz/1.3MHz Step-up PWM DC/DC Converter

Datasheet	Packaging	Samples & Pricing	Eval. Boards	Reliability	Design Tools	Application Notes	Knowledge Base

Features

•	1.6A, 0.2, internal switch
•	Operating voltage as low as 2.0V
•	600kHz/1.3MHz pin selectable frequency operation
•	Over temperature protection
•	8-Lead MSOP package

General Description

The LM2622 is a step-up DC/DC converter with a 1.6A, 0.2

internal switch and pin selectable operating frequency. More...

Applications

•	TFT Bias Supplies
•	Handheld Devices
•	Portable Applications
•	GSM/CDMA Phones
•	Digital Cameras

Typical Application

click for larger image

Parametric Table expand

Parametric Table collapse

Buffers 0

Output Current 1500 mA

Switching Frequency 600000 Hz

Temperature Min -40 deg C

Temperature Max 125 deg C

Buffers 0

Multiple Output Capability Yes

On/Off Pin Yes

Error Flag No

Input Min Voltage 2 Volt

Input Max Voltage 12 Volt

Output Current 1500 mA

Adjustable Output Yes

Output Range 1.26V to 12V

Switching Frequency 600000 Hz

Adj Switch Frequency Yes

Sync Pin No

Efficiency (peak) 90 %

Flyback Yes

Inverting No

Step-Up Yes

Step-Down No

RegType Switching Regulator

DisplayType LCD

View Using Catalog

Typical Performance

click for larger image

WEBENCH Live Simulation!

LM2622 WEBENCH® Custom Design/Analyze/Build It/Test It
2.00 <=	V in Lower V	<=	V in Upper V	<= 12.00
V out	2.00 <=		V	<= 18.00
I out			A	<= 1.00
Ambient Temperature			°C	<= 100
What are WEBENCH® tools?

Also Recommended

LM3224

2.4A Switch (Supports Higher Resolution, More Power, Or Larger TFT/LCD)

Additional Resources

Design Tools (see below)

Application Notes (see below)

Block Diagram

click for larger image

Datasheet

RoHS Compliance Information	Size in Kbytes	Date
LM2622 600kHz/1.3MHz Step-up PWM DC/DC Converter	464 Kbytes	13-May-04	View Online	Download	Receive via Email
LM2622 600kHz/1.3MHz Step-up PWM DC/DC Converter (Japanese)	646 Kbytes

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Package Availability, Models, Samples & Pricing

Part Number

Package

Factory Lead Time

Models

Samples &
Electronic
Orders

Budgetary Pricing

Std
Pack
Size

Package
Marking
Format

Type

Pins

Spec.

MSL
Rating

Peak
Reflow

RoHS
Report

CAD
Symbols

Weeks

Qty

$US each

LM2622EVAL

600kHz/1.3MHz Step-up PWM DC/DC Converter

Full production

N/A

$59.00

8 weeks

N/A

LM2622MM-ADJ

MINI SOIC

NOPB

260

RoHS

Download

Full production

N/A

1K+

$0.90

reel
of
1000

ZXTT
S18B

8 weeks

2000

LM2622MMX-ADJ

MINI SOIC

NOPB

260

RoHS

Download

Full production

N/A

1K+

$0.90

reel
of
3500

ZXTT
S18B

6 weeks

40000

LM2622-ADJ MDC

Unpackaged Die

Full production

N/A

CALL

tray
of
N/A

N/A

General Description

The LM2622 is a step-up DC/DC converter with a 1.6A, 0.2 internal switch and pin selectable operating frequency. With the ability to convert 3.3V to multiple outputs of 8V, -8V, and 23V, the LM2622 is an ideal part for biasing TFT displays. The LM2622 can be operated at switching frequencies of 600kHz and 1.3MHz allowing for easy filtering and low noise. An external compensation pin gives the user flexibility in setting frequency compensation, which makes possible the use of small, low ESR ceramic capacitors at the output. The LM2622 is available in a low profile 8-lead MSOP package.

Reliability Metrics

Part Number	Process	Early Failure Rate - Rejects	Sample Size (EFR)	PPM *	Rel. Rejects	Device Hours	Long Term Failure Rates (FITS)	MTTF
LM2622-ADJ MDC	ABCD150	0	28280	0	0	2974000	2	843880620
LM2622MM-ADJ	ABCD150	0	28280	0	0	2974000	2	843880620
LM2622MMX-ADJ	ABCD150	0	28280	0	0	2974000	2	843880620

For more information on Reliability Metrics, please click here.

Design Tools

Title	Size in Kbytes	Date
Your Walls Will Be Changing			View

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Application Notes

Title	Size in Kbytes	Date
AN-1274: Application Note 1274 LM2623 Evaluation Board	636 Kbytes	21-Sep-05	View Online	Download	Receive via Email
AN-1274 (Chinese): Application Note 1274 LM2623 Evaluation Board	208 Kbytes
AN-1250: Application Note 1250 Inductive Based Switching Regulator Circuits Provide High Efficiency White LED Drives	81 Kbytes	26-Sep-02	View Online	Download	Receive via Email
AN-1258: Application Note 1258 National's LM2623 Boost Converter - A Simple Supply	64 Kbytes	30-Jan-04	View Online	Download	Receive via Email
AN-1237: Application Note 1237 RSDS™ Flat Panel Display Design Guidelines Part 2	141 Kbytes	14-May-03	View Online	Download	Receive via Email
AN-1221: Application Note 1221 LM2623 General Purpose, Boost Converter Circuit	35 Kbytes	3-Feb-04	View Online	Download	Receive via Email
AN-1221 (Japanese): Application Note 1221 LM2623 General Purpose, Boost Converter Circuit	60 Kbytes
AN-1198: Application Note 1198 LM2622 Step-Up DC/DC Converter Evaluation Board	110 Kbytes	3-Apr-07	View Online	Download	Receive via Email

If you have trouble printing or viewing PDF file(s), see Printing Problems.

[Information as of 29-Aug-2008]