LT1579CS datasheet(18/20 Pages) LINER

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LT1579

APPLICATIONS INFORMATION

The inputs of the device can withstand reverse voltages up

to 20V. Current flow into the device will be limited to less

than 1mA (typically less than 100

µA) and no negative

voltage will appear at the output. The device will protect

both itself and the load. This provides protection against

batteries which can be plugged in backwards. Internal

protection circuitry isolates the inputs to prevent current

flow from one input to the other. Even with one input

supplying all bias currents and the other being plugged in

backwards (a maximum total differential of 40V), current

flow from one input to another will be limited to less than

1mA. Output voltage will be unaffected. In the case of

reverse inputs, no reverse voltages will appear at the load.

Pulling the SS pin low will cause all load currents to come

from the secondary input. If the secondary input is not

present, the output will be turned off. If the part is put into

current limit with the SS pin pulled low, current limit will

be drawn from the secondary input until it is discharged,

at which point the current limit will drop to zero.

PACKAGE DESCRIPTION Dimensions in inches (millimeters) unless otherwise noted.

GN Package

16-Lead Plastic SSOP (Narrow 0.150)

(LTC DWG # 05-08-1641)

GN16 (SSOP) 1197

* DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH

SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE

** DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD

FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE

0.229 – 0.244

(5.817 – 6.198)

0.150 – 0.157**

(3.810 – 3.988)

16 15 14 13

0.189 – 0.196*

(4.801 – 4.978)

12 11 10 9

0.016 – 0.050

(0.406 – 1.270)

0.015

± 0.004

(0.38

± 0.10)

× 45°

° – 8° TYP

0.007 – 0.0098

(0.178 – 0.249)

0.053 – 0.068

(1.351 – 1.727)

0.008 – 0.012

(0.203 – 0.305)

0.004 – 0.0098

(0.102 – 0.249)

0.025

(0.635)

BSC

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