MIC4680 Datasheet, PDF (4/16 Pages) Micrel Semiconductor – 1A 200kHz SuperSwitcher™ Buck Regulator Final Information

MIC4680
Parameter
Condition
Min
MIC4680/-3.3/-5.0
Frequency Fold Back
30
Oscillator Frequency
180
Saturation Voltage
I_OUT = 1A
Short Circuit Current Limit
V_FB = 0V, see Test Circuit
1.3
Standby Quiescent Current
V_SHDN = V_IN
V_SHDN = 5V (regulator off)
Shutdown Input Logic Level
regulator off
2
regulator on
Shutdown Input Current
V_SHDN = 5V (regulator off)
–10
V_SHDN = 0V (regulator on)
–10
Thermal Shutdown
Note 1.
Note 2.
Note 3.
Note 4.
Note 5.
Note 6.
Note 7.
Exceeding the absolute maximum rating may damage the device.
The device is not guaranteed to function outside its operating rating.
Absolute maximum rating is intended for voltage transients only, prolonged dc operation is not recommended.
V_IN(min) = V_OUT + 2.5V or 4V whichever is greater.
Devices are ESD sensitive. Handling precautions recommended.
Measured on 1" square of 1 oz. copper FR4 printed circuit board connected to the device ground leads.
Test at T_A = +85°C, guaranteed by design, and characterized to T_J = +125°C.
Typ
50
200
1.4
1.8
1.5
30
1.6
1.0
–0.5
–1.5
160
Micrel
Max Units
100 kHz
220 kHz
1.8
V
V
2.5
A
µA
100
µA
V
0.8
V
10
µA
10
µA
°C
Test Circuit
+12V
Device Under Test
2 _IN
SW ³
68µH
SHUTDOWN
ENABLE
1 _SHDN
FB ⁴
I
GND
SOP-8
5–8
Current Limit Test Circuit
Shutdown Input Behavior
OFF
ON
GUARANTEED
ON
0.8V
TYPICAL
ON
0V
1V
1.6V
GUARANTEED
OFF
2V
TYPICAL
OFF
V_IN(max)
Shutodwn Hysteresis
MIC4680
4
June 2000