LT1370IR datasheet(3/16 Pages) LINER

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LT1370

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Error Amplifier Clamp Voltage

High Clamp, VFB = 1V

1.5

1.8

2.30

Low Clamp, VFB = 1.5V

0.2

0.3

0.52

Error Amplifier Voltage Gain

500

V/ V

VC Pin Threshold

Duty Cycle = 0%

0.9

1.1

1.35

Switching Frequency

2.7V

≤ VIN ≤ 25V

460

500

550

kHz

°C ≤ TJ ≤ 125°C

440

500

580

kHz

–40

°C ≤ TJ ≤ 0°C (I-Grade)

400

580

kHz

Maximum Switch Duty Cycle

Switch Current Limit Blanking Time

130

300

Output Switch Breakdown Voltage

LT1370

LT1370HVC, 0

°C ≤ TJ ≤ 125°C

LT1370HVI, – 40

°C ≤ TJ ≤ 0°C (I-Grade)

VSAT

Output Switch ON Resistance

ISW = 6A

0.065

0.11

Ω

ILIM

Switch Current Limit

Duty Cycle = 50%

Duty Cycle = 80% (Note 1)

∆IIN

Supply Current Increase During Switch ON Time

mA/A

∆ISW

Control Voltage to Switch Current

A/V

Transconductance

Minimum Input Voltage

2.4

2.7

Supply Current

2.7V

≤ VIN ≤ 25V

4.5

Shutdown Supply Current

2.7V

≤ VIN ≤ 25V, VS/S ≤ 0.6V

µA

Shutdown Threshold

2.7V

≤ VIN ≤ 25V

0.6

1.3

Shutdown Delay

412

µs

S/S Input Current

≤ S/S ≤ 5V

–7

µA

Synchronization Frequency Range

600

800

kHz

ELECTRICAL C

HARA TERISTICS

VIN = 5V, VC = 0.6V, VFB = VREF, VSW, S/S and NFB pins open, TA = 25°C unless otherwise noted.

The q denotes specifications which apply over the full operating

temperature range.

Note 1: For duty cycles (DC) between 45% and 85%, minimum switch

current limit is given by ILIM = 2.65(2.7 – DC).

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