4

LT3021/LT3021-1.2/

LT3021-1.5/LT3021-1.8

3021fa

OUTPUT CURRENT (mA)

0

250

225

200

150

175

125

100

75

50

25

0

3021 G01

200

100

300

400

500

TEMPERATURE (

°C)

–50

250

225

200

150

175

125

100

75

50

25

0

3021 G02

25

0

–25

50

75

125

100

The

ELECTRICAL CHARACTERISTICS

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Note 1: Absolute Maximum Ratings are those values beyond which the life

of a device may be impaired.

Note 2: The LT3021 regulators are tested and specified under pulse load

characterization and correlation with statistical process controls.

Note 3: This IC includes overtemperature protection that is intended to

protect the device during momentary overload conditions. Junction

temperature will exceed 125

°C when overtemperature protection is active.

Continuous operation above the specified maximum operating junction

temperature may impair device reliability.

Note 4: Maximum junction temperature limits operating conditions. The

regulated output voltage specification does not apply for all possible

combinations of input voltage and output current. Limit the output current

range if operating at maximum input voltage. Limit the input voltage range

if operating at maximum output current.

Note 5: Typically the LT3021 supplies 500mA output current with a 1V

input supply. The guranteed minimum input voltage for 500mA output

current is 1.10V.

Note 6: The LT3021 is tested and specified for these conditions with an

resistor divider adds 10

µA of output load current. The line regulation and

load regulation specifications refer to the change in the 0.2V reference

voltage, not the 0.5V output voltage. Specifications for fixed output voltage

devices are referred to the output voltage.

Note 7: Dropout voltage is the minimum input to output voltage differential

needed to maintain regulation at a specified output current. In dropout the

current source load. GND pin current will increase in dropout. See GND

pin current curves in the Typical Performance Characteristics section.

Note 9: Adjust pin bias current flows out of the ADJ pin.

Note 10: Shutdown pin current flows into the SHDN pin.

Note 11: Reverse output current is tested with IN grounded and OUT

forced to the rated output voltage. This current flows into the OUT pin and

out of the GND pin. For fixed voltage devices this includes the current in

the output resistor divider.

Note 12: The LT3021 is tested and specified for these conditions with an

resistor divider adds 10

µA of load current.

trying to restore the output voltage to its nominal value.

Note 14: Minimum input voltage is the minimum voltage required by the

control circuit to regulate the output voltage and supply the full 500mA

voltages the minimum input voltage required for regulation will be equal to

TYPICAL PERFOR A CE CHARACTERISTICS

Dropout Voltage

Dropout Voltage

Current Limit (Note 12)

1.8

A

●

550

mA

Input Reverse Leakage Current

1

20

µA

Reverse Output Current

LT3021

0.5

5

µA

(Notes 11, 13)

LT3021-1.2

10

15

µA

LT3021-1.5

10

15

µA

LT3021-1.8

10

15

µA

TEMPERATURE (

°C)

–50

1.2

1.1

1.0

0.9

0.8

0.6

0.7

0.5

0.4

0.3

0.2

3021 G16

25

0

–25

50

75

125

100

Minimum Input Voltage