LT1308BIS8-PBF datasheet(3/20 Pages) LINER

Part #	LT1308BIS8-PBF

Description	High Current, Micropower Single Cell, 600kHz DC/DC Converters

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Manufacturer	LINER [Linear Technology]

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LT1308A/LT1308B

1308abfa

The ● denotes specifications which apply over the full operating temperature range, otherwise specifications are TA = 25°C.

Industrial Grade – 40

°C to 85°C. VIN = 1.2V, VSHDN = VIN, unless otherwise noted.

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

IQ

Quiescent Current

Not Switching, LT1308A

●

140

240

μA

Switching, LT1308B

●

2.5

4

mA

VSHDN = 0V (LT1308A/LT1308B)

●

0.01

1

μA

VFB

Feedback Voltage

●

1.19

1.22

1.25

V

IB

FB Pin Bias Current

(Note 3)

●

27

80

nA

Reference Line Regulation

1.1V

≤ VIN ≤ 2V

●

0.05

0.4

%/V

2V

≤ VIN ≤ 10V

●

0.01

0.2

%/V

Minimum Input Voltage

0.92

1

V

gm

Error Amp Transconductance

ΔI = 5μA60

μmhos

AV

Error Amp Voltage Gain

100

V/V

ELECTRICAL CHARACTERISTICS The ● denotes specifications which apply over the full operating temperature

range, otherwise specifications are TA = 25°C. Commercial Grade 0°C to 70°C. VIN = 1.1V, VSHDN = VIN, unless otherwise noted.

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

IQ

Quiescent Current

Not Switching, LT1308A

140

240

μA

Switching, LT1308B

2.5

4

mA

VSHDN = 0V (LT1308A/LT1308B)

0.01

1

μA

VFB

Feedback Voltage

●

1.20

1.22

1.24

V

IB

FB Pin Bias Current

(Note 3)

●

27

80

nA

Reference Line Regulation

1.1V

≤ VIN ≤ 2V

●

0.03

0.4

%/V

2V

≤ VIN ≤ 10V

0.01

0.2

%/V

Minimum Input Voltage

0.92

1

V

gm

Error Amp Transconductance

ΔI = 5μA60

μmhos

AV

Error Amp Voltage Gain

100

V/V

fOSC

Switching Frequency

VIN = 1.2V

●

500

600

700

kHz

Maximum Duty Cycle

●

82

90

%

Switch Current Limit

Duty Cyle = 30% (Note 4)

2

3

4.5

A

Switch VCESAT

ISW = 2A (25°C, 0°C), VIN = 1.5V

290

350

mV

ISW = 2A (70°C), VIN = 1.5V

330

400

mV

Burst Mode Operation Switch Current Limit

VIN = 2.5V, Circuit of Figure 1

400

mA

(LT1308A)

Shutdown Pin Current

VSHDN = 1.1V

●

25

μA

VSHDN = 6V

●

20

35

μA

VSHDN = 0V

●

0.01

0.1

μA

LBI Threshold Voltage

196

200

204

mV

●

194

200

206

mV

LBO Output Low

ISINK = 50μA

●

0.1

0.25

V

LBO Leakage Current

VLBI = 250mV, VLBO = 5V

●

0.01

0.1

μA

LBI Input Bias Current (Note 5)

VLBI = 150mV

33

100

nA

Low-Battery Detector Gain

3000

V/V

Switch Leakage Current

VSW = 5V

●

0.01

10

μA

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