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ELM99271A

LOW SATURATION VOLTAGE REGULATOR

Elm Electronics 

ELM99xxxA LOW SATURATION VOLTAGE REGULATOR

■ GENERAL DESCRIPTION

ELM99xxxA series is CMOS voltage regulator providing large current. It consists of devices including

reference voltage source, error amplifier, low resistance output transistor, short-circuit protection circuit,

output voltage setting resistor, chip-enable circuit. Output voltage is fixed internally with high accuracy.

ELM99xxxA provides excellent characteristics, such as small input-output voltage difference due to low

resistance output transistor, high load stability due to high gain error amplifier.

The chip-enable function is available in three selections, no-chip enable function, active-low (“L” active)

and active-high (“H” active).

The package is SOT-89-3 or SOT-89-5. SOT-89-5 is used for chip enable version.

■ FEATURES

・ Maximum output current

: 300mA (Intenal current limiter operates in case load

current exceeds 300mA.)

・ High accuracy of output voltage

: ± 2.0%

・ Small input-output voltage differential

: TYP. 140mV (ELM9930xA IOUT=40mA)

・ Low stand-by current consumption

: TYP. 0.1 μ A (ELM99xx3A)

・ High load stability

: TYP. 5mV (1mA ≦ Iout ≦ 100mA)

・ High input stability

: TYP. 0.15%/V (ELM9930xA IOUT=40mA)

・ Output voltage range

: 2.0V ～ 6.0V ( 0.1V steps )

・ Short-circuit current limiter

: TYP. 70mA (VOUT=0V)

・ Chip-enable pin available

: “L”active ELM99xx2A, “H”active ELM99xx3A

■ APPLICATION

・ Cellular telephones

・ Palmtops

・ Laptop and notebook computers

・ cameras and video recorders

・ Reference voltage sources

・ Battery-operated devices

・ PCMCIA cards

■ PIN CONFIGURATION

1.ELM99xx1A

2.ELM99xx2A

3.ELM99xx3A

5

4

5

4

SOT-89

SOT-89-5

SOT-89-5

1

2

3

( TOP VIEW )

SOT-89

Pin No. Pin Name

1

VSS

2

VIN

3

VOUT

1

2

3

( TOP VIEW )

SOT-89-5

Pin No. Pin Name

1

VSS

2

VIN

3

VOUT

4

NC

5

CE

1

2

3

( TOP VIEW )

SOT-89-5

Pin No. Pin Name

1

VSS

2

VIN

3

VOUT

4

NC

5

CE

220

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