ZXLD1366 datasheet(2/32 Pages) DIODES

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ZXLD1366

Document number: DS31992 Rev. 5 - 2

2 of 32

www.diodes.com

June 2010

A Product Line of

Diodes Incorporated

Block Diagram

Figure 1 Pin connection for TSOT23-5 package

Pin Description

Name

TSOT23-5 DFN3030-6

SO8-EP

Description

Drain of NDMOS switch

GND

2, 5

2, 3, 6, 7

Ground (0V)

ADJ

Multi-function On/Off and brightness control pin:

•

Leave floating for normal operation.(VADJ = VREF = 1.25V giving

nominal average output current IOUTnom = 0.2V/RS)

•

Drive to voltage below 0.2V to turn off output current

•

Drive with DC voltage (0.3V < VADJ < 2.5V) to adjust output current

from 25% to 200% of IOUTnom

•

Connect a capacitor from this pin to ground to set soft-start time.

Soft start time increases approximately 0.2ms/nF

ISENSE

Connect resistor RS from this pin to VIN to define nominal average output

current IOUTnom = 0.2V/RS

(Note: RSMIN = 0.2V with ADJ pin open-circuit)

VIN

Input voltage (6V to 60V). Decouple to ground with 4.7µF of higher X7R

ceramic capacitor close to device

Low voltage

detector

Voltage

regulator

ISENSE

Adj

Gnd

VIN

50K

20K

1.25V

1.35V

0.2V

600KHz

4.7mF

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