Data Sheet

LT3073

analog.com

Rev 0.

4 of 37

(All typical specifications are at TJ (Junction Temperature) = 25°C and all min and max specifications are across

the entire operating temperature range unless otherwise noted. COUT = 22μF, CREF= 4.7μF, CBIASF = 2.2μF, RMON =

0.8kΩ, unless otherwise noted. )

PARAMETER

SYMBOL

CONDITIONS/COMMENTS

MIN

TYP

MAX

UNITS

Dropout Voltage 2

VDO

VIN = VOUT(NOMINAL),

VBIAS ≥ VOUT + 1.2V,

IOUT = 3A

TJ = 25°C

45

65

mV

100

Minimum Load Current

IOUT(MIN)

VOUT ≥ 0.8V

10

mA

VOUT < 0.8V

50

Ground Pin Current

IGND

VBIAS = 5.5V, VIN = 1.5V, VOUT = 1.2V, IOUT

= 10mA

4.3

6.5

mA

VBIAS = 5.5V, VIN = 1.5V, VOUT = 1.2V, IOUT

= 3A

5.2

7

BIAS Pin Current

IBIAS

VIN = 1.4V, VOUT = 1.2V, VBIAS = 3.3V, IOUT

= 10mA

4.3

6.5

mA

VIN = 1.4V, VOUT = 1.2V, VBIAS = 3.3V, IOUT

= 3A

5.8

8

BIAS Pin Current in

Dropout 2

IBIAS_DO

VBIAS = VOUT +1.2V, VIN = VOUT(NOMINAL), IOUT

= 3A

5.4

7.5

mA

VBIAS = 5.5V, VIN = VOUT(NOMINAL), IOUT = 3A

35

50

BIAS Pin Nap Mode

Current

IBIAS_NAP

VBIAS = 5.5V, EN = 0V

10

μA

IN Pin Nap Mode Current

IIN_NAP

VIN = 5.5V, EN = 0V

20

500

μA

IMON Output Current

IOUT = 3A, VIN – VOUT = 0.2V

0.98

1.0

1.03

mA

IOUT = 1A, VIN – VOUT = 0.2V

313.3 333.3 353.3

μA

IOUT/IMON Ratio

IOUT = 3A, VIN – VOUT = 0.2V

2912

3000

3060

IOUT = 1A, VIN – VOUT = 0.2V

2820

3000

3180

IMON Shutdown Current

VBIAS = 5.0V, EN = 0V

1

μA

Programmable Current

Limit 3

ILIM(P)

RMON = 1kΩ

2.93

3.0

3.07

A

RMON = 3kΩ

0.94

1.0

1.06

Internal Current Limit 3

ILIM(I)

VIN = 1.5V, ΔVOUT = -5%, VBIAS = 5.5V

4.5

5.5

A

VOUT Threshold for Power

Good

Percentage of VOUT(NOMINAL), VOUT Rising

91

93

95

%

Percentage of VOUT(NOMINAL), VOUT

Falling

88

90

92

PG VOL

IPG = 200μA (Fault Condition)

60

100

mV

PG VOH Leakage

VPG = VBIAS = 5V

1

μA

Fast Start-Up REF Pin

Current

2

mA

Fast Start-Up Turn Off

Threshold

Measured as percentage of final REF

pin voltage

96

98.8

101.5

%

TEMP Output Scale 4

10

mV/°C