Dual 150mA ULTRA LOW DROPOUT,

LOW NOISE REGULATOR

© 2000 SEMTECH CORP.

652 MITCHELL ROAD NEWBURY PARK CA 91320

SC1456

PRELIMINARY - June 15, 2000

1

DESCRIPTION

The SC1456 contains two low dropout linear regulators

that operate from a +2.5V to +6V input range and

deliver up to 150mA. PMOS pass transistors allow a

low 110µA supply current per device to remain

independent of load, making these devices ideal for

battery operated portable equipment such as cellular

phones,

cordless

phones

and

personal

digital

assistants.

Each device can be powered from a separate supply

voltage or the same supply voltage for maximum

flexibility. The output voltage of each device can be

preset or adjusted with an external resistor divider.

Other features include independant low powered

shutdown, short circuit protection, thermal shutdown

protection and reverse battery protection for each

regulator. The SC1456 comes in the tiny 10 lead MSOP

package.

FEATURES

APPLICATIONS

TEL:805-498-2111 FAX:805-498-3804 WEB:http://www.semtech.com

Part Number

Package

SC1456XIMSTR

(1)(2)

MSOP-10

ORDERING INFORMATION

Notes:

(1) Where X denotes voltage options - see table on page 4. Consult factory for other voltage options.

(2) Only available in tape and reel packaging. A reel contains 2500 devices.

TYPICAL APPLICATIONS

VOUT1 = PRESET

VOUT2 = PRESET

VIN2

VIN1

C1

1uF

C4

1uF

C2

1uF

C3

1uF

U1

SC1456

1

2

3

4

5

6

7

8

9

10

EN1

GND

SET1

OUT2

IN2

EN2

GND

SET2

OUT1

IN1

(OR VIN1)

VOUT1 (SEE EQUATION)

VOUT2 = PRESET

VIN1

VIN2

U1

SC1456

1

2

3

4

5

6

7

8

9

10

EN1

GND

SET1

OUT2

IN2

EN2

GND

SET2

OUT1

IN1

C1

1uF

C3

2.2uF

C4

1uF

C2

1uF

R1

R2

(OR VIN1)

Output Voltages Set Internally

Output 1 Set Externally and Output 2 Set Internally

Ω

≤











 +

•

=

k

120

2

R

2

R

1

R

1

250

.

1

V

1

OUT