150mA ULTRA LOW DROPOUT,

LOW NOISE REGULATOR

© 2000 SEMTECH CORP.

652 MITCHELL ROAD NEWBURY PARK CA 91320

SC8863

March 1, 2000

2

PIN DESCRIPTIONS

Pin #

Pin Name

Description

1

EN

Active high enable pin. Connect to VIN if not being used.

2

GND

Ground pin. Can be used for heatsinking if needed.

3

IN

Input pin.

4

OUT

Regulator output, sourcing up to 150mA

5

SET

Connecting this pin to ground results in the internally preset value for

V

TYPICAL APPLICATION - EXTERNALLY SET OUTPUT VOLTAGE

(1)

TYPICAL APPLICATION - INTERNALLY PRESET OUTPUT VOLTAGE

VIN > VOUT + VD(MAX)

VOUT @ IOUT up to 150mA

U1

SC8863

1

2

3

4

5

EN

GND

VIN

VO

SET

C1

1uF Ceramic

C2

1uF Ceramic











 +

•

=

2

R

1

R

1

250

.

1

V

OUT

NOTES:

(1) Select R1 and R2 such that the current flowing through them is

≥ 10µA (i.e. R2 ≤ 120kΩ). A value of 10kΩ is

recommended for R2. Please see Component Selection - Externally Set Output.

VOUT @ IOUT up to 150mA

VIN > VOUT + VD(MAX)

C2

2.2uF Ceramic

U1

SC8863

1

2

3

4

5

EN

GND

VIN

VO

SET

R1

R2

10k

C1

1uF Ceramic