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PDF SC2982 Data sheet ( Hoja de datos )
| Número de pieza | SC2982 | |
| Descripción | 50mA Ultra Low Dropout/ Low Noise Micropower Linear Regulator | |
| Fabricantes | Semtech Corporation | |
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POWER MANAGEMENT
Description
SC2982
50mA Ultra Low Dropout, Low
Noise Micropower Linear Regulator
PRELIMINARY
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.
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.
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 output noise is reduced by placing a 10nF capacitor
on pin 4 (bypass).
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.
Applications
u Battery Powered Systems
u Cellular Telephones
u Cordless Telephones
u Pagers
u Personal Digital Assistants
u Portable Instrumentation
u Cameras
u Portable Consumer Equipment
u PCMCIA Cards
Typical Application Circuit
VIN
EN
+ CIN
1uF
U1 SC2982
1
VIN
5
VO
2 GND
3 EN
BYP 4
VO
CBYP
10nF
+ Co
1uF
Notes:
(1) CIN is 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. CIN may be a tantalum or aluminum electrolytic capacitor.
(2) CO should 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) CBYP should 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
1
www.semtech.com
1 page  
POWER MANAGEMENT
Outline Drawing - SOT-23-5
SC2982
PRELIMINARY
Land Pattern - SOT-23-5
Contact Information
Semtech Corporation
Power Management Products Division
652 Mitchell Rd., Newbury Park, CA 91320
Phone: (805)498-2111 FAX (805)498-3804
ã 2001 Semtech Corp.
5
www.semtech.com
5 Page | ||
| Páginas | Total 5 Páginas | |
| PDF Descargar | [ Datasheet SC2982.PDF ] | |
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