Datasheet > LP3985IBL-2.85

LP3985IBL-2.85

更新时间： 2024-09-25 23:47:47

品牌	Logo	应用领域
其他 - ETC		稳压器
页数	文件大小	规格书
16页	488K
描述
VOLT REGULATOR\|FIXED\|+2.85V\|CMOS\|BGA\|5PIN\|PLASTIC

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LP3985IBL-2.85 数据手册

May 2002

LP3985

Micropower, 150mA Low-Noise Ultra Low-Dropout CMOS

Voltage Regulator

2.85V, 2.9V, 3.0V. 3.1V, 3.2V, 3.3V, 4.7V and 5.0V output

voltages. For other output voltage options between 2.5V to

5.0V or for a dual LP3985, please contact National Semicon-

General Description

The LP3985 is designed for portable and wireless applica-

tions with demanding performance and space requirements.

ductor sales office.

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

high-quality tantalum output capacitor. The micro SMD re-

quires the smallest possible PC board area - the total appli-

cation circuit area can be less than 2.0mm x 2.5mm, a

fraction of a 1206 case size.

Key Specifications

n 2.5 to 6.0V input range

n 150mA guaranteed output

n 60dB PSRR at 1kHz, 50dB at 10kHz 3.1V_IN

n ≤1.5µA quiescent current when shut down

n Fast Turn-On time: 200 µs (typ.)

n 100mV maximum dropout with 150mA load

n 37µVrms output noise over 10Hz to 100kHz

n −40 to +125˚C junction temperature range for operation

n 2.5V, 2.6V, 2.7V, 2.8V, 2.85V, 2.9V, 3.0V, 3.1V, 3.2V,

3.3V, 4.7V and 5.0V outputs standard

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.

An optional external bypass capacitor reduces the output

noise without slowing down the load transient response.

Fast start-up time is achieved by utilizing an internal

power-on circuit that actively pre-charges the bypass capaci-

tor.

Features

n Miniature 5-I/O micro SMD and SOT-23-5 package

n Logic controlled enable

n Stable with ceramic and high quality tantalum capacitors

n Fast turn-on

n Thermal shutdown and short-circuit current limit

Power supply rejection is better than 60 dB at low frequen-

cies and starts to roll off at 10 kHz. High power supply

rejection is maintained down to low input voltage levels

common to battery operated circuits.

The device is ideal for mobile phone and similar battery

powered wireless applications. It provides up to 150 mA,

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.

Applications

n CDMA cellular handsets

n Wideband CDMA cellular handsets

n GSM cellular handsets

The LP3985 is available in a 5 bump small bump micro SMD,

a 5 bump large bump micro SMD, and a 5 pin SOT-23

package. Performance is specified for −40˚C to +125˚C

temperature range and is available in 2.5V, 2.6V, 2.7V, 2.8V,

n Portable information appliances

Typical Application Circuit

10136402

Note: Pin Numbers in parenthesis indicate micro SMD package.

Optional Noise Reduction Capacitor.

DS101364

www.national.com

12 3 4 5 6 7...16

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与LP3985IBL-2.85相关器件

型号	品牌	获取价格	描述	数据表
LP3985IBL-2.9	NSC	获取价格	Micropower, 150mA Low-Noise Ultra Low-Dropout CMOS Voltage Regulator
LP3985IBL-285	NSC	获取价格	Micropower, 150mA Low-Noise Ultra Low-Dropout CMOS Voltage Regulator
LP3985IBL-285/NOPB	TI	获取价格	2.85V FIXED POSITIVE LDO REGULATOR, 0.1V DROPOUT, PBGA5, 0.995 MM HEIGHT, MICRO, SMD-5
LP3985IBL-3.0	NSC	获取价格	Micropower, 150mA Low-Noise Ultra Low-Dropout CMOS Voltage Regulator
LP3985IBL-3.1	NSC	获取价格	Micropower, 150mA Low-Noise Ultra Low-Dropout CMOS Voltage Regulator
LP3985IBL-3.1/NOPB	TI	获取价格	3.1V FIXED POSITIVE LDO REGULATOR, 0.1V DROPOUT, PBGA5, 0.995 MM HEIGHT, MICRO, SMD-5
LP3985IBL-3.2	NSC	获取价格	Micropower, 150mA Low-Noise Ultra Low-Dropout CMOS Voltage Regulator
LP3985IBL-3.2/NOPB	TI	获取价格	3.2V FIXED POSITIVE LDO REGULATOR, 0.1V DROPOUT, PBGA5, 0.995 MM HEIGHT, MICRO, SMD-5
LP3985IBL-3.3	NSC	获取价格	Micropower, 150mA Low-Noise Ultra Low-Dropout CMOS Voltage Regulator
LP3985IBL-4.8	NSC	获取价格	Micropower, 150mA Low-Noise Ultra Low-Dropout CMOS Voltage Regulator

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