Datasheet > LP3985

LP3985

更新时间： 2024-11-23 12:19:07

品牌	Logo	应用领域
德州仪器 - TI		稳压器
页数	文件大小	规格书
29页	1361K
描述
LP3985 Micropower, 150mA Low-Noise Ultra Low-Dropout CMOS Voltage Regulator

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LP3985 数据手册

LP3985

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SNVS087AC –OCTOBER 2000–REVISED MAY 2013

LP3985 Micropower, 150mA Low-Noise Ultra Low-Dropout CMOS Voltage Regulator

Check for Samples: LP3985

FEATURES

DESCRIPTION

The LP3985 is designed for portable and wireless

applications with demanding performance and space

requirements.

•

Miniature 5-I/O DSBGA and USON Package

Logic Controlled Enable

•

Stable with Ceramic and High Quality

Tantalum Capacitors

The LP3985 is stable with a small 1µF ±30% ceramic

or high-quality tantalum output capacitor. The DSBGA

requires the smallest possible PC board area - the

total application circuit area can be less than 2.0mm x

2.5mm, a fraction of a 1206 case size.

•

Fast Turn-on

Thermal Shutdown and Short-Circuit Current

Limit

The LP3985's performance is optimized for battery

powered systems to deliver ultra low noise, extremely

low dropout voltage and low quiescent current.

Regulator ground current increases only slightly in

dropout, further prolonging the battery life.

APPLICATIONS

•

CDMA Cellular Handsets

Wideband CDMA Cellular Handsets

GSM Cellular Handsets

An optional external bypass capacitor reduces the

output noise without slowing down the load transient

response. Fast startup time is achieved by utilizing an

internal power-on circuit that actively pre-charges the

bypass capacitor.

Portable Information Appliances

KEY SPECIFICATIONS

•

2.5 to 6.0V Input Range

Power supply rejection is better than 50dB at low

frequencies and starts to roll off at 1kHz. High power

supply rejection is maintained down to low input

voltage levels common to battery operated circuits.

150mA Verified Output

50dB PSRR at 1kHz @ VIN = VOUT + 0.2V

≤1.5μA Quiescent Current when Shut Down

Fast Turn-On time: 200μs (typ.)

The device is ideal for mobile phone and similar

battery powered wireless applications. It provides up

to 150mA, from a 2.5V to 6V input. The LP3985

consumes less than 1.5µA in disable mode and has

fast turn-on time less than 200µs.

100mV Maximum Dropout with 150mA Load

30μVrms Output Noise (typ.) Over 10Hz to

100kHz

•

−40 to +125°C Junction Temperature Range for

Operation

2.5V, 2.6V, 2.7V, 2.8V, 2.85V, 2.9V, 3.0V, 3.1V,

3.2V, 3.3V, 4.7V, 4.75V, 4.8V and 5.0V outputs

standard

Typical Application Circuit

1(C3)

3(A1)

5(C1)

V_IN

V_OUT

LP3985

1mF

4(A3)

V_EN

BYPASS

2(B2)

Pin Numbers in parenthesis indicate DSBGA package.

* Optional Noise Reduction Capacitor.

Figure 1.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

All trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

12 3 4 5 6 7...29

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LP3985 替代型号

型号	品牌	替代类型	描述	数据表
LP2983	TI	功能相似	具有低输出电压和使能功能的 150mA、16V、低压降稳压器
LP3995	TI	功能相似	Micropower 150-mA CMOS Voltage Regulator With Active Shutdown
BL8563	BELLING	功能相似	Low noise, fast response 300mA LDO regulator

与LP3985相关器件

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LP3985-12B3F		获取价格	300mA,Ultra-low noise, Small Package
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LP3985-15B3F		获取价格	300mA,Ultra-low noise, Small Package
LP3985-15X3F		获取价格	300mA,Ultra-low noise, Small Package
LP3985-18B3F		获取价格	300mA,Ultra-low noise, Small Package
LP3985-18X3F		获取价格	300mA,Ultra-low noise, Small Package
LP3985-25B3F		获取价格	300mA,Ultra-low noise, Small Package
LP3985-25X3F		获取价格	300mA,Ultra-low noise, Small Package
LP3985-28B3F		获取价格	300mA,Ultra-low noise, Small Package
LP3985-28X3F		获取价格	300mA,Ultra-low noise, Small Package

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