LT1501IS8-5 datasheet(3/16 Pages) LINER

Part #	LT1501IS8-5

Description	Adaptive-Frequency Current Mode Switching Regulators

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Manufacturer	LINER [Linear Technology]

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3

LT1500/LT1501

ELECTRICAL CHARACTERISTICS T

J = 25°C, VIN = 2.3V unless otherwise noted.

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Internal Divider Current

LT1500-3.3/LT1501-3.3

q

22

30

µA

LT1500-5/LT1501-5

q

33

45

µA

Operating Quiescent Current

VIN ≤ 5V, VSHDN = 2.3V (Note 1)

q

200

280

µA

VIN = 15V

q

320

µA

Supply Current in Shutdown

VSHDN ≤ 0.2V, Fixed Voltages (Note 7)

TJ ≥ 0°C

q

815

µA

TJ < 0°C20

µA

Shutdown Pin Threshold

q

0.4

1.1

V

Shutdown Pin Input Current

VSHDN = 2.3V

q

310

µA

Input Start-Up Voltage

VSHDN = VIN

TJ ≥ 0°C

q

2.0

2.1

V

TJ < 0°C

2.2

V

Undervoltage Lockout

Light Load

1.8

V

Full Load

2.0

2.1

V

Power Switch

Switch On Resistance

ISW = 0.7A (Note 2)

q

0.50

0.72

Ω

Peak Switch Current (Note 3)

q

0.7

0.85

1.3

A

Switch Breakdown Voltage

ISW = 100µA

q

30

45

V

Switch Leakage Current

VSW = 5V

q

0.2

5

µA

VSW = 20V

q

0.3

10

µA

Switch Turn-On Delay (Note 5)

800

ns

Switch Turn-Off Delay (Note 5)

400

ns

Current Sense Resistor

q

0.28

0.42

Ω

Low-Battery Comparator

Low-Battery Threshold

Falling Edge

q

1.20

1.24

1.28

V

Threshold Hysteresis

20

mV

LBI Input Bias Current

q

20

50

nA

LBO Output Low State

VLBI = 1.2V, ISINK = 100µA

q

0.1

0.25

V

ISINK = 2mA

q

0.3

0.5

V

LBO Leakage Current

VLBI = 1.3V, VLBO ≤ 15V

q

2

µA

LT1500 Functions

SYNC Pin Bias Current

VSYNC = 3.3V

q

15

35

µA

SYNC Pin Threshold

q

0.4

1.3

V

Error Amplifier Transconductance

600

µmho

VC Pin Source Current

20

µA

VC Pin High Clamp Voltage

1.20

1.26

1.32

V

NFB Reference Voltage

FB Pin Open

q

1.230

1.265

1.300

V

NFB Pin Bias Current

q

12

20

µA

NFB to FB Transconductance

Note 4

10,000

µmho

Soft Start Bias Current

Current Flows Out of Pin

q

247

µA

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