ZXLD1321

Issue 1 - January 2008

3

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© Zetex Semiconductors plc 2008

Absolute maximum ratings

(Voltages relative to GND unless otherwise stated)

DC-DC converter

High-side current monitor

Switching NPN transistor

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

Operating temperature (top)

-40 to 125

°C

Storage temperature (Tst)

-55 to 150

°C

Junction temperature (Tj)

-40 to 150

°C

Package power dissipation (Ptot)

DFN-14 with exposed pad: 4mmx3mm, 0.5mm Pitch

1.5W at Tamb = 70

°C

Supply voltage (VIN)

-0.3V to +12V

ADJ

-0.3V to The lower of (+5.0V) or (VIN + 0.3V)

CFB

-0.3V to The lower of (+5.0V) or (VIN + 0.3V)

ISENSE

-0.3V to The lower of (+5.0V) or (VIN + 0.3V)

TADJ

-0.3V to The lower of (+5.0V) or (VIN + 0.3V)

BIAS

-0.3V to The lower of (+5.0V) or (VIN + 0.3V)

Monitor supply voltage (M_VIN)

-0.3V to +18V

Continuous sense voltage

(M_VIN – M_LOAD)

-0.3V to +5V

3A (Pulse width = 300µs. Duty cycle<=2%)

Nominal value

DFN-14

26.3°C/W