Datasheet > SI91841

SI91841

更新时间： 2024-11-04 22:43:15

品牌	Logo	应用领域
威世 - VISHAY		稳压器
页数	文件大小	规格书
9页	122K
描述
150-mA Ultra Low-Noise LDO Regulator With Discharge Option

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中文翻译

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SI91841 数据手册

Si91841/3

Vishay Siliconix

150-mA Ultra Low-Noise LDO Regulator

With Discharge Option

FEATURES

D Ultra Low Dropout—130 mV at 150-mA Load

D Si91841: Output, Auto-Discharge In Shutdown Mode

D Si91843: Output, No-Discharge In Shutdown Mode

D Ultra Low Noise—30 mV_(rms)(10-Hz to 100-kHz

Bandwidth)

D Shutdown Control

D Fixed 1.8, 2.0, 2.2, 2.5, 2.6, 2.7, 2.8, 2.85, 2.9, 3.0, 3.3,

3.5, 3.6, 5.0-V Output Voltage Options

D Thin SOT23-5 Package

D 110-mA Ground Current at 150-mA Load

D 1.5% Guaranteed Output Voltage Accuracy

D 300-mA Peak Output Current Capability

D Uses Low ESR Ceramic Capacitors

D Fast Start-Up (50 ms)

APPLICATIONS

D Cellular Phones, Wireless Handsets

D Fast Line and Load Transient Response (v 30 ms)

D 1-mA Maximum Shutdown Current

D Output Current Limit

D Noise-Sensitive Electronic Systems, Laptop and

Palmtop Computers

D PDAs

D Reverse Battery Protection

D Pagers

D Built-in Short Circuit and Thermal Protection

D Digital Cameras

D MP3 Player

D Wireless Modem

DESCRIPTION

The Si91841/3 is a 150-mA CMOS LDO (low dropout) voltage

regulator. It is the perfect choice for low voltage, low power

applications. An ultra low ground current makes this part

attractive for battery operated power systems. The Si91841/3

also offers ultra low dropout voltage to prolong battery life in

portable electronics. Systems requiring a quiet voltage

source, such as RF applications, will benefit from the

Si91841/3’s ultra low output noise. An external noise bypass

capacitor connected to the device’s BP pin can further reduce

the noise level. The Si91841/3 is designed to maintain

regulation while delivering 300-mA peak current, making it

ideal for systems that have a high surge current upon turn-on.

pull-down circuit is built into the Si91841/3 to clamp the output

voltage when it rises beyond normal regulation. The Si91841

automatically discharges the output voltage by connecting the

output to ground through a 100-W n-channel MOSFET when

the device is put in shutdown mode.

The Si91841/3 features reverse battery protection to limit

reverse current flow to approximately 1-mA in the event

reversed battery is applied at the input, thus preventing

damage to the IC.

The Si91841/3 is available in both standard and lead (Pb)-free

packages.

For better transient response and regulation, an active

TYPICAL APPLICATION CIRCUIT

Si91841/3

OUT

1 mF

GND

10 nF

Thin SOT-23, 5-Lead

Document Number: 71447

S-40592—Rev. C, 29-Mar-04

www.vishay.com

12 3 4 5 6 7...9

中文翻译

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与SI91841相关器件

型号	品牌	获取价格	描述	数据表
SI91841DT-18-T1	VISHAY	获取价格	150-mA Ultra Low-Noise LDO Regulator With Discharge Option
SI91841DT-18-T1-E3	VISHAY	获取价格	Regulator, 1 Output, CMOS, PDSO5
SI91841DT-20-T1	VISHAY	获取价格	150-mA Ultra Low-Noise LDO Regulator With Discharge Option
SI91841DT-20-T1-E3	VISHAY	获取价格	IC VREG 2 V FIXED POSITIVE LDO REGULATOR, 0.3 V DROPOUT, PDSO5, LEAD FREE, THIN SOT-23, 5
SI91841DT-22-T1	VISHAY	获取价格	150-mA Ultra Low-Noise LDO Regulator With Discharge Option
SI91841DT-22-T1-E3	VISHAY	获取价格	IC VREG 2.2 V FIXED POSITIVE LDO REGULATOR, 0.3 V DROPOUT, PDSO5, LEAD FREE, THIN SOT-23,
SI91841DT-25-T1	VISHAY	获取价格	150-mA Ultra Low-Noise LDO Regulator With Discharge Option
SI91841DT-26-T1	VISHAY	获取价格	150-mA Ultra Low-Noise LDO Regulator With Discharge Option
SI91841DT-26-T1-E3	VISHAY	获取价格	Regulator, 1 Output, CMOS, PDSO5
SI91841DT-27-T1	VISHAY	获取价格	150-mA Ultra Low-Noise LDO Regulator With Discharge Option

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