POWER MANAGEMENT

1

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SC1456

Dual 150mA Ultra Low

Dropout, Low Noise Regulator

Revision: November 16, 2005

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 (lead

free, fully WEEE and RoHS compliant available).

Battery Powered Systems

Cellular Telephones

Cordless Telephones

Personal Digital Assistants

Portable Instrumentation

Modems

PCMCIA cards

Two guaranteed 150 mA outputs

Designed to operate with ceramic capacitors

Fixed or adjustable outputs

Very small external components

Low 75µV

Very low supply currents

Thermal overload protection

Reverse battery protection

Individual low power shutdown

Full industrial temperature range

Surface mount packaging (10 pin MSOP)

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)

Description

Features

Applications

Typical Application Circuits

Ω

≤











 +

•

=

k

120

2

R

2

R

1

R

1

250

.

1

V

1

OUT

Output Voltages Set Internally

Output 1 Set Externally and Output 2 Set Internally