SC2982CSK-2.5TRT

更新时间： 2024-01-01 02:02:10

品牌	Logo	应用领域
商升特 - SEMTECH		线性稳压器IC 调节器电源电路光电二极管输出元件
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5页	134K
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SC2982CSK-2.5TRT 数据手册

SC2982

50mA Ultra Low Dropout, Low

Noise Micropower Linear Regulator

PRELIMINARY

POWER MANAGEMENT

Description

Features

The SC2982 is a 50mA ultra low dropout linear

regulator with a built in CMOS/TTL logic level enable

switch. It is designed specifically for battery powered

applications where low quiescent current and low

dropout are critical for battery longevity.

u Ultra low dropout voltage - 100mV @ 50mA

u Guaranteed 50mA output current

u Low ground pin current at all loads

u <1µA quiescent current in shutdown

u Wide input supply voltage range 2.5V to 16V

u Wide output voltage range

u Excellent line regulation

u Industrial temperature range

u Surface mount packaging (5 pin SOT-23)

The SC2982 uses a Semtech proprietary internal PNP

device for the pass element, providing a low dropout

voltage of 100mV at a load of 50mA, while maintaining a

ground pin current of 600µA.

Applications

The output noise is reduced by placing a 10nF capacitor

on pin 4 (bypass).

u Battery Powered Systems

u Cellular Telephones

u Cordless Telephones

u Pagers

u Personal Digital Assistants

u Portable Instrumentation

u Cameras

Each device contains a bandgap reference, error

amplifier, PNP pass element, thermal and current

limiting circuitry and resistor divider network for setting

output voltage.

The SC2982 is packaged in a 5 pin SOT-23 surface mount

package for a very small footprint and requires only a

1µF capacitor on the output for a minimum number of

external components.

u Portable Consumer Equipment

u PCMCIA Cards

Typical Application Circuit

U1 SC2982

VIN

GND

BYP

1uF

BYP

10nF

Notes:

(1) C_INis needed if the device is far from the supplys filter capacitors, or for operation from a battery. A value of 1µF

or greater should be used. C_INmay be a tantalum or aluminum electrolytic capacitor.

(2) C_Oshould be a 1µF or greater tantalum or aluminum electrolytic capacitor. Larger value capacitors will improve

the overall transient response. Due to their very low ESR, ceramic capacitors should not be used.

(3) C_BYPshould be placed as close as possible to pin 4 and ground. A 10nF ceramic capacitor is recommended.

(4) EN should be tied to VIN if the shutdown feature is not required. Maximum EN voltage = VIN.

Revision 1, January 2001

www.semtech.com

12 3 4 5

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