ZXLD1366 datasheet(2/32 Pages) DIODES

2 / 32 page

ZXLD1366

Issue 2 - September 2008

www.zetex.com

www.diodes.com

Absolute maximum ratings (voltages to GND unless otherwise stated)

Electrical characteristics (test conditions: VIN=24V, Tamb=25°C unless otherwise stated)(a)

NOTES:

(a) Production testing of the device is performed at 25°C. Functional operation of the device and parameters specified over

a -40°C to +105°C temperature range, are guaranteed by design, characterization and process control.

(b) VIN > 16V to fully enhance output transistor. Otherwise out current must be derated - see graphs. Operation at low

supply may cause excessive heating due to increased on-resistance. Tested at 7V guaranteed for 6V by design.

A, see Graph, Page 17

(d) 100% brightness corresponds to VADJ = VADJ(nom) = VREF. Driving the ADJ pin above VREF will increase the VSENSE.

threshold and output current proportionally.

Input voltage (VIN)

-0.3V to +60V (65V for 0.5 sec)

ISENSE voltage (VSENSE)

+0.3V to -5V (measured with respect to VIN)

LX output voltage (VLX)

-0.3V to +60V (65V for 0.5 sec)

Adjust pin input voltage (VADJ)-0.3V to +6V

Switch output current (ILX)

1.25A

Power dissipation (Ptot)

(Refer to package thermal de-rating curve on page 26)

SOT23-5; 1W: DFN; 1.8W

Operating temperature (TOP)

-40 to 125°C

Storage temperature (TST)

-55 to 150°C

Junction temperature (Tj MAX)150°C

These are stress ratings only. Operation outside the absolute maximum ratings may cause device failure. Operation

at the absolute maximum ratings, for extended periods, may reduce device reliability.

Thermal resistance

TSOT23-5

DFN

Junction to ambient (R JA)

82°C/W

44°C/W

Junction to board (RΨJB)

33°C/W

Junction to case (R JC)-

14°C/W

Symbol

Parameter

Conditions

Min.

Typ.

Max.

Unit

VIN

Input voltage

See note(b)

660

VSU

Internal regulator start-up threshold

4.85

5.2

VSD

Internal regulator shutdown threshold

4.4

4.75

IINQoff

Quiescent supply current

with output off

ADJ pin grounded

108

IINQon

Quiescent supply current

with output switching(c)

ADJ pin floating,

L=68 H, 3 LEDs,

f = 260kHz

1.6

VSENSE

Mean current sense threshold voltage

(Defines LED current setting accuracy)

Measured on ISENSE pin

with respect to VIN

VADJ = 1.25V; VIN=18V

195

200

205

VSENSEHYS Sense threshold hysteresis

±15

ISENSE

ISENSE pin input current

VSENSE = VIN -0.2

VREF

Internal reference voltage

Measured on ADJ pin

with pin floating

1.25

VREF / T Temperature coefficient of VREF

ppm/°C

VADJ

External control voltage range on ADJ

pin for DC brightness control(d)

0.3

2.5

VADJoff

DC voltage on ADJ pin to switch

device from active (on) state to

quiescent (off) state

VADJ falling

0.15

0.2

0.27

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