LT3009 Series

1

3009fd

TEMPERATURE (°C)

400

3009 TA01b

200

100

50

0

500

300

250

150

4.0

350

3.5

2.0

1.0

0.5

0

5.0

450

4.5

3.0

2.5

1.5

–50 –25

0

25

50

75

100 125 150

DROPOUT

VOLTAGE

TYPICAL APPLICATION

FEATURES

APPLICATIONS

DESCRIPTION

Low Dropout Linear Regulators

(LDO) linear regulators. The devices supply 20mA output

current with a dropout voltage of 280mV. No-load quiescent

current is 3μA. Ground pin current remains at less than

5% of output current as load increases. In shutdown,

quiescent current is less than 1μA.

The LT3009 regulators optimize stability and transient

response with low ESR ceramic capacitors, requiring a

minimum of only 1μF. The regulators do not require the

addition of ESR as is common with other regulators.

Internal protection circuitry includes current limiting,

thermal limiting, reverse-battery protection and reverse-

current protection.

The LT3009 Series are ideal for applications that require

moderate output drive capability coupled with ultralow

standby power consumption. The device is available in

fixed output voltages of 1.2V, 1.5V, 1.8V, 2.5V, 3.3V and 5V,

and as an adjustable device with an output voltage range

down to the 600mV reference. The LT3009 is available in

the 6-lead DFN and 8-lead SC70 packages.

L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear

Technology Corporation. All other trademarks are the property of their respective owners.

3.3V, 20mA Supply with Shutdown

3.3V, 5V

(1μF minimum)

Utility Meters

Hotel Door Locks

IN

SHDN

1μF

3009 TA01a

OUT

3.75V TO

20V

GND

LT3009-3.3

3.3V

20mA

1μF

Dropout Voltage/Quiescent Current