RoHS Compliance Information	Size in Kbytes	Date
LM3103 SIMPLE SWITCHER® Synchronous 1MHz 0.75A Step-Down Voltage Regulator	352 Kbytes	22-Oct-07	Download
LM3103 SIMPLE SWITCHER® Synchronous 1MHz 0.75A Step-Down Voltage Regulator (Japanese)	536 Kbytes

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

Qty

$US each

LM3103EVAL

SIMPLE SWITCHER® Synchronous 1MHz 0.75A Step-Down Voltage Regulator

Full production

N/A

1+

$41.90

1

-

8 weeks

N/A

LM3103MH

TSSOP EXP PAD

16

NOPB

1

260

RoHS

N/A

Full production

N/A

1K+

$1.80

rail of 92

NSUZXYTT LM3103 MH

6 weeks

N/A

LM3103MHX

TSSOP EXP PAD

16

NOPB

1

260

RoHS

N/A

Full production

N/A

1K+

$1.80

reel of 2500

NSUZXYTT LM3103 MH

8 weeks

N/A

General Description

The LM3103 Synchronously Rectified Buck Converter features all required functions to implement a highly efficient and cost effective buck regulator. It is capable of supplying 0.75A to loads with an output voltage as low as 0.6V. Dual N-Channel synchronous MOSFET switches allow a low component count, thus reducing complexity and minimizing board size.

Different from most other COT regulators, the LM3103 does not rely on output capacitor ESR for stability, and is designed to work exceptionally well with ceramic and other very low ESR output capacitors. It requires no loop compensation, results in a fast load transient response and simple circuit implementation. The operating frequency remains nearly constant with line variations due to the inverse relationship between the input voltage and the on-time. The operating frequency can be externally programmed up to 1 MHz. Protection features include V_CC under-voltage lock-out, output over-voltage protection, thermal shutdown, and gate drive under-voltage lock-out. The LM3103 is available in the thermally enhanced eTSSOP-16 package.

Design Tools

Title	Size in Kbytes	Date
Article - Emulated Ripple Technique Advances Hysteretic Switchmode Supplies			View
Article - Tip of the Week: How to best implement a synchronous buck converter			View
Article - Emulated ripple makes step-down conversion easy			View

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Application Notes

Title	Size in Kbytes	Date
AN-1678: Application Note 1678 LM3103 Demonstration Board Reference Design	217 Kbytes	2-Oct-07	Download

More Application Notes

Title	Size in Kbytes	Date
AN-1646: Application Note 1646 LM3102 Demonstration Board Reference Design	216 Kbytes	2-Oct-07	Download
AN-1646 (Chinese): Application Note 1646 LM3102 Demonstration Board Reference Design	411 Kbytes
AN-1481: Application Note 1481 Controlling Output Ripple and Achieving ESR Independence in Constant On-Time (COT) Regulator Designs	574 Kbytes	27-Sep-06	Download
AN-1481 (Japanese): Application Note 1481 Controlling Output Ripple and Achieving ESR Independence in Constant On-Time (COT) Regulator Designs	220 Kbytes
AN-1481 (Chinese): Application Note 1481 Controlling Output Ripple and Achieving ESR Independence in Constant On-Time (COT) Regulator Designs	421 Kbytes
AN-1443: Application Note 1443 LM3100 Demonstration Board Reference Design	3704 Kbytes	11-Mar-07	Download
AN-1443 (Chinese): Application Note 1443 LM3100 Demonstration Board Reference Design	444 Kbytes