TC4949 Просмотр технического описания (PDF) - TelCom Semiconductor Inc => Microchip

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TC4949

Multifunction Very Low Dropout Voltage Regulator

TelCom Semiconductor Inc => Microchip 

Multifunction Very Low Dropout Voltage Regulator

Multifunction Very Low Dropout Voltage Regulator

TTCC4499449

FEATURES

s Operating DC Supply Voltage Range 5.0V to 28V

s Transient Supply Voltage up to 40V

s Extremely Low Quiescent Current in

Standby Mode

s High Precision Standby Output Voltage 5.0V ±1%

s Output Current Capability up to 100mA

s Very Low Dropout Voltage less than 0.4V

s Reset Circuit Sensing the Output Voltage

s Programmable Reset Pulse Delay with

External Capacitor

s Voltage Sense Comparator

s Thermal Shutdown and Short Circuit Protections

REPRESENTATIVE BLOCK DIAGRAM

Supply

Voltage (VCC)

1

Output

Voltage (VOUT)

VZ 3

8 CT 4

Preregulator

6.0V

2.0µA

Sense

Input

(SIN)

2

Regulator

VS

1.23VREF

+

–

Reset

+

–

+

- 2.0V

+

–

+

- 1.23V

Sense

5 Gnd

Reset

6

Sense

Output

(SOUT)

7

GENERAL DESCRIPTION

The TC4949 is a monolithic integrated 5.0V voltage

regulator with a very low dropout and additional functions

such as power–on reset and input voltage sense. It is

designed for supplying the micro–computer controlled sys-

tems especially in automotive applications.

ORDERING INFORMATION

Part

Number

Package

TC4949VPA

TC4949VOA

8-Pin PDIP (Narrow)

8-Pin SOIC (Narrow)

Temperature

Range

–40 to +125°C

–40 to +125°C

PIN CONFIGURATIONS

8-Pin PDIP

VCC 1

SIN 2

VZ 3

CT 4

TC4949

8 VOUT

7 SOUT

6 RESET

5 GND

8-Pin SOIC

VCC 1

SIN 2

VZ 3

CT 4

TC4949

8 VOUT

7 SOUT

6 RESET

5 GND

TC4949-1 1/6/00

TelCom Semiconductor reserves the right to make ch1anges in the circuitry and specifications of its devices.

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