Datasheet > LM2611

LM2611

更新时间： 2024-11-24 11:10:07

品牌	Logo	应用领域
德州仪器 - TI		转换器
页数	文件大小	规格书
29页	811K
描述
1.4MHz Cuk 转换器

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LM2611

SNOS965J –JUNE 2001–REVISED DECEMBER 2015

LM2611 1.4-MHz Cuk Converter

1 Features

3 Description

The LM2611 is a current mode, PWM inverting

•

1.4-MHz Switching Frequency

Low R_DS(ON)DMOS FET

switching regulator. Operating from a 2.7-V to 4-V

supply, it is capable of producing a regulated

negative output voltage of up to −(36 V_IN(MAX)). The

LM2611 utilizes an input and output inductor, which

enables low voltage ripple and RMS current on both

the input and the output. With a switching frequency

of 1.4 MHz, the inductors and output capacitor can be

physically small and low cost. High efficiency is

achieved through the use of a low R_DS(ON)FET.

1-mVp-p Output Ripple

−5 V at 300 mA From 5-V Input

Better Regulation Than a Charge Pump

Uses Tiny Capacitors and Inductors

Wide Input Range: 2.7 V to 14 V

Low Shutdown Current: <1 µA

5-Pin SOT-23 Package

The LM2611 features a shutdown pin, which can be

activated when the part is not needed to lower the Iq

and save battery life. A negative feedback (NFB) pin

provides a simple method of setting the output

voltage, using just two resistors. Cycle-by-cycle

current limiting and internal compensation further

simplify the use of the LM2611.

2 Applications

•

MR Head Bias

Digital Camera CCD Bias

LCD Bias

The LM2611 is available as a small 5-pin, SOT-23

package and comes in two grades. Grade A has a

1.2-A current limit and 0.5-Ω R_DS(ON), and Grade B

GaAs FET Bias

Positive to Negative Conversion

has a 0.9-A current limit and 0.7-Ω R_DS(ON)

Device Information⁽¹⁾

PART NUMBER

LM2611

PACKAGE

BODY SIZE (NOM)

SOT-23 (5)

1.60 mm × 2.90 mm

(1) For all available packages, see the orderable addendum at

the end of the data sheet.

Typical Application Circuit

47 mH

15 mH

CUK

- 5V

OUT

300 mA

1 mF

FB1

29.4k

330 pF

OUT

LM2611A NFB

SHDN

22 mF

GND

FB2

10k

: TAIYO YUDEN X5R JMK325BJ226MM

: TAIYO YUDEN X5R EMK316BJ105MF

: TAIYO YUDEN X5R JMK325BJ226MM

CUK

OUT

D: ON SEMICONDUCTOR MBR0520

L1: SUMIDA CR32-150

L2: SUMIDA CR32-470

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.

12 3 4 5 6 7...29

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与LM2611相关器件

型号	品牌	获取价格	描述	数据表
LM2611_05	NSC	获取价格	1.4MHz Cuk Converter
LM2611AMF	NSC	获取价格	1.4MHz Cuk Converter
LM2611AMF	TI	获取价格	1.4MHz Cuk 转换器 \| DBV \| 5 \| -40 to 125
LM2611AMF/NOPB	TI	获取价格	1.4MHz Cuk 转换器 \| DBV \| 5 \| -40 to 125
LM2611AMF/NOPB	NSC	获取价格	IC 2 A SWITCHING REGULATOR, 1800 kHz SWITCHING FREQ-MAX, PDSO5, LEAD FREE, SOT-23, 5 PIN,
LM2611AMFX	NSC	获取价格	1.4MHz Cuk Converter
LM2611AMFX/NOPB	ROCHESTER	获取价格	2 A SWITCHING REGULATOR, 1800 kHz SWITCHING FREQ-MAX, PDSO5, SOT-23, 5 PIN
LM2611AMFX/NOPB	NSC	获取价格	IC 2 A SWITCHING REGULATOR, 1800 kHz SWITCHING FREQ-MAX, PDSO5, SOT-23, 5 PIN, Switching R
LM2611AMFX/NOPB	TI	获取价格	1.4MHz Cuk 转换器 \| DBV \| 5 \| -40 to 125
LM2611BMF	NSC	获取价格	1.4MHz Cuk Converter

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