Datasheet > LP3991

LP3991

更新时间： 2024-11-27 11:10:39

品牌	Logo	应用领域
德州仪器 - TI		稳压器
页数	文件大小	规格书
24页	699K
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具有使能功能的 300mA、低压降稳压器

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LP3991

SNVS296J –DECEMBER 2006–REVISED JUNE 2016

LP3991 300-mA LDO for Digital Applications

1 Features

3 Description

Operating from a minimum input voltage of 1.65 V,

•

Input Voltage From 1.65 V to 4 V

the LP3991 LDO has been designed to provide fixed

stable output voltages for load currents up to 300 mA.

This device is suitable where accurate low voltages

are required from low input voltage sources and is

therefore suitable for post regulation of switched

mode regulators. In such applications, significant

improvements in performance and EMI can be

realized, with little reduction in overall efficiency. The

LP3991 provides fixed outputs as low as 1.2 V from a

wide input range from 1.65 V to 4 V Using the enable

(EN) pin, the device may be controlled to provide a

shutdown state, in which negligible supply current is

drawn.

Output Voltage From 0.8 V to 3 V

1% Accuracy at Room Temperature

125-mV Dropout at 300-mA Load

50-µA Quiescent Current at 1-mA Load

Inrush Current Controlled to 600 mA

PSRR 65 dB at 1 kHz

100-µs Start-Up Time for 1.5-V V_OUT

Stable With Ceramic Capacitors as Small as 0402

Thermal-Overload and Short-Circuit Protection

2 Applications

The LP3991 is designed to be stable with space-

saving ceramic capacitors as small as 0402 case

size.

•

Post DC-DC Regulator

Battery Operated Devices

Hand-Held Information Appliances

Performance is specified for a –40°C to +125°C

junction temperature range. For output voltage

options, contact your local Texas Instruments sales

office.

Device Information⁽¹⁾

PART NUMBER

LP3991

PACKAGE

BODY SIZE (NOM)

DSBGA (4)

1.43 mm × 0.96 mm

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

the end of the datasheet.

space

Typical Application Circuit

LP3991

V_IN

OUT

1 mF

C_IN

4.7 mF

C_OUT

Load

V_EN

GND

* For V_OUT= 1.3 V or less,

C_OUTmay be reduced to 2.2 mF.

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...24

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与LP3991相关器件

型号	品牌	获取价格	描述	数据表
LP3991TL-0.8	INTERSIL	获取价格	300mA Linear Voltage Regulator for Digital Applications
LP3991TL-0.8	NSC	获取价格	IC VREG 0.8 V FIXED POSITIVE REGULATOR, PBGA4, 0.963 X 1.446 MM, LEAD FREE, MICRO SMD-4, F
LP3991TL-0.8/NOPB	TI	获取价格	300mA Linear Voltage Regulator for Digital Applications 4-DSBGA
LP3991TL-0.8/NOPB	NSC	获取价格	IC VREG 0.8 V FIXED POSITIVE REGULATOR, PBGA4, 0.963 X 1.446 MM, ROHS COMPLIANT, MICRO SMD
LP3991TL-1.2	INTERSIL	获取价格	300mA Linear Voltage Regulator for Digital Applications
LP3991TL-1.2	NSC	获取价格	300mA Linear Voltage Regulator for Digital Applications
LP3991TL-1.2/NOPB	TI	获取价格	具有使能功能的 300mA、低压降稳压器 \| YZR \| 4 \| -40 to 125
LP3991TL-1.3	NSC	获取价格	300mA Linear Voltage Regulator for Digital Applications
LP3991TL-1.3	INTERSIL	获取价格	300mA Linear Voltage Regulator for Digital Applications
LP3991TL-1.3/NOPB	TI	获取价格	具有使能功能的 300mA、低压降稳压器 \| YZR \| 4 \| -40 to 125

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