Datasheet

Micrel, Inc. MIC4680
March 2008 4
M9999-032808
Parameter Condition Min Typ Max Units
regulator off 2 1.6 V
Shutdown Input Logic
Level
regulator on 1.0 0.8 V
V
SHDN
= 5V (regulator off) –10 –0.5 10 µA Shutdown Input Current
V
SHDN
= 0V (regulator on) –10 –1.5 10 µA
Thermal Shutdown 160 °C
Notes:
1. Exceeding the absolute maximum rating may damage the device.
2. The device is not guaranteed to function outside its operating rating.
3. Absolute maximum rating is intended for voltage transients only, prolonged dc operation is not recommended.
4. V
IN(min)
= V
OUT
+ 2.5V or 4V whichever is greater.
5. Devices are ESD sensitive. Handling precautions recommended.
6. Measured on 1" square of 1 oz. copper FR4 printed circuit board connected to the device ground leads.
7. Test at T
A
= +85°C, guaranteed by design, and characterized to T
J
= +125°C.
Test Circuit
SW
68µH
IN
FB
GND
SHDN
Device Unde
r
Test
+12V
SHUTDOWN
ENABLE
SOIC-8 5–8
4
32
1
I
Current Limit Test Circuit
Shutdown Input Behavior
OFF
ON
0.8V
1V0V 1.6V V
IN(max)
2V
Shutdown Hysteresis