LM20123

アクティブ

オプションで車載グレード製品が利用可能、2.95 ～ 5.5V、3A、電流モード、同期整流降圧レギュレータ

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データシート

この製品には新バージョンがあります。

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TPS62813-Q1

アクティブ

車載対応、固定 Fsw 動作、SYNC (同期型)、2 x 3mm ウェッタブル・フランク・パッケージ封止、2.75V ～ 6V、3A、降圧コンバータ Improved performance: Fixed-frequency, spread-spectrum in smaller 2-mm x 3-mm QFN with wettable flanks.

LM20123

アクティブ

データシート

ご注文はこちら

製品詳細

Rating

Catalog

Operating temperature range (°C)

-40 to 125

Topology

Buck

Type

Converter

Iout (max) (A)

3

Vin (min) (V)

2.95

Vin (max) (V)

5.5

Switching frequency (min) (kHz)

1500

Switching frequency (max) (kHz)

1500

Features

Adjustable current limit, Enable, Power good, Pre-Bias Start-Up, Synchronous Rectification, Tracking

Control mode

current mode

Vout (min) (V)

0.8

Vout (max) (V)

5

Iq (typ) (A)

0.0035

Rating

Catalog

Operating temperature range (°C)

-40 to 125

Topology

Buck

Type

Converter

Iout (max) (A)

3

Vin (min) (V)

2.95

Vin (max) (V)

5.5

Switching frequency (min) (kHz)

1500

Switching frequency (max) (kHz)

1500

Features

Adjustable current limit, Enable, Power good, Pre-Bias Start-Up, Synchronous Rectification, Tracking

Control mode

current mode

Vout (min) (V)

0.8

Vout (max) (V)

5

Iq (typ) (A)

0.0035

HTSSOP (PWP)

16

32 mm² 5 x 6.4

Input voltage range 2.95V to 5.5V

Accurate current limit minimizes inductor size

96% efficiency with 1.5 MHz switching frequency

32 mΩ integrated FET switches

Starts up into pre-biased loads

Output voltage tracking

Peak current mode control

Adjustable output voltage down to 0.8V

Adjustable Soft-Start with external capacitor

Precision enable pin with hysteresis

Integrated OVP, UVLO, power good and thermal shutdown

eTSSOP-16 exposed pad package

Input voltage range 2.95V to 5.5V

Accurate current limit minimizes inductor size

96% efficiency with 1.5 MHz switching frequency

32 mΩ integrated FET switches

Starts up into pre-biased loads

Output voltage tracking

Peak current mode control

Adjustable output voltage down to 0.8V

Adjustable Soft-Start with external capacitor

Precision enable pin with hysteresis

Integrated OVP, UVLO, power good and thermal shutdown

eTSSOP-16 exposed pad package

The LM20123 is a full featured 1.5 MHz synchronous buck regulator capable of delivering up to 3A of continuous output current. The current mode control loop can be compensated to be stable with virtually any type of output capacitor. For most cases, compensating the device only requires two external components, providing maximum flexibility and ease of use. The device is optimized to work over the input voltage range of 2.95V to 5.5V making it suited for a wide variety of low voltage systems.

The device features internal over voltage protection (OVP) and over current protection (OCP) circuits for increased system reliability. A precision enable pin and integrated UVLO allows the turn on of the device to be tightly controlled and sequenced. Start-up inrush currents are limited by both an internally fixed and externally adjustable Soft-Start circuit. Fault detection and supply sequencing is possible with the integrated power good circuit.

The LM20123 is designed to work well in multi-rail power supply architectures. The output voltage of the device can be configured to track a higher voltage rail using the SS/TRK pin. If the output of the LM20123 is pre-biased at startup it will not sink current to pull the output low until the internal soft-start ramp exceeds the voltage at the feedback pin.

The LM20123 is offered in a 16-pin eTSSOP package with an exposed pad that can be soldered to the PCB, eliminating the need for bulky heatsinks.

The LM20123 is a full featured 1.5 MHz synchronous buck regulator capable of delivering up to 3A of continuous output current. The current mode control loop can be compensated to be stable with virtually any type of output capacitor. For most cases, compensating the device only requires two external components, providing maximum flexibility and ease of use. The device is optimized to work over the input voltage range of 2.95V to 5.5V making it suited for a wide variety of low voltage systems.

The device features internal over voltage protection (OVP) and over current protection (OCP) circuits for increased system reliability. A precision enable pin and integrated UVLO allows the turn on of the device to be tightly controlled and sequenced. Start-up inrush currents are limited by both an internally fixed and externally adjustable Soft-Start circuit. Fault detection and supply sequencing is possible with the integrated power good circuit.

The LM20123 is designed to work well in multi-rail power supply architectures. The output voltage of the device can be configured to track a higher voltage rail using the SS/TRK pin. If the output of the LM20123 is pre-biased at startup it will not sink current to pull the output low until the internal soft-start ramp exceeds the voltage at the feedback pin.

The LM20123 is offered in a 16-pin eTSSOP package with an exposed pad that can be soldered to the PCB, eliminating the need for bulky heatsinks.

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	種類	タイトル	最新の英語版をダウンロード		日付
*	データシート	LM20123 3A, 1.5MHz PowerWise ® Synchronous Buck Regulator (jp) データシート (Rev. C 翻訳版)	最新英語版 (Rev.E)	PDF \| HTML	2008年 1月 16日
	セレクション・ガイド	電源 IC セレクション・ガイド 2018 (Rev. R 翻訳版)	英語版 (Rev.R)		2018年 9月 13日
	EVM ユーザーガイド (英語)	AN-1686 LM20123 Evaluation Board (Rev. B)			2013年 5月 3日
	アプリケーション・ノート	AN-1747 3A LM20k Reference Designs (Rev. A)			2013年 5月 3日
	アプリケーション・ノート	AN-2077 LM20k POL Module (Rev. A)			2013年 5月 3日
	製品概要	5.5V耐圧版、LM20Kファミリー			2012年 8月 20日
	アプリケーション・ノート	Application Note 1686 LM20123 Evaluation Board (jp)			2007年 10月 30日