4

LT1307/LT1307B

ELECTRICAL C

C

HARA TERISTICS

Industrial Grade – 40

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Quiescent Current

q

50

100

µA

q

1

1.8

mA

q

13

µA

Feedback Voltage

q

1.195

1.22

1.245

V

FB Pin Bias Current (Note 2)

q

10

27

100

nA

Reference Line Regulation

1V

0.6

1.1

%/V

1V

3.2

%/V

2V

q

0.3

0.8

%/V

Minimum Input Voltage

– 40

°C

1.1

1.2

V

85

°C

0.8

1.0

V

Input Voltage Range

q

5V

Error Amp Transconductance

∆I = 5µA

q

25

35

65

µmhos

Error Amp Voltage Gain

– 40

°C

35

V/V

85

°C

30

V/V

Switching Frequency

q

500

600

750

kHz

Maximum Duty Cycle

– 40

°C80

84

%

85

°C75

80

%

Switch Current Limit (Note 3)

DC = 40%

q

0.6

1.25

A

DC = 75%

0.5

A

250

350

mV

330

400

mV

Burst Mode Operation Switch Current Limit

L = 10

µH

100

mA

(LT1307 Only)

L = 22

µH50

mA

Shutdown Pin Current

q

2.5

4.0

µA

q

– 1.5

– 2.5

µA

LBI Threshold Voltage

q

186

200

210

mV

LBO Output Low

q

0.1

0.25

V

LBO Leakage Current

q

0.1

0.3

µA

LBI Input Bias Current (Note 4)

q

530

nA

Low-Battery Detector Gain

1M

Ω Load (–40°C)

1000

6000

V/V

1M

Ω Load (85°C)

400

V/V

Switch Leakage Current

q

0.01

3

µA

Note 2: Bias current flows into FB pin.

Note 3: Switch current limit guaranteed by design and/or correlation to

static tests. Duty cycle affects current limit due to ramp generator.

Note 4: Bias current flows out of LBI pin.

Note 5: The LT1307 will withstand continuous application of 1.6V applied

temperature range.

Note 1: Specifications for commercial (C) grade devices are guaranteed

but not tested at – 20

°C. MS8 package devices are designed for and

intended to meet commercial temperature range specifications but are not

tested at – 20

°C or 0°C.