MIC4681 Micrel Semiconductor, MIC4681 Datasheet - Page 3

• Manufacturer Part Number: MIC4681
• Description: 2A-Peak SuperSwitcher SOP-8 Buck Regulator
• Manufacturer: Micrel Semiconductor

Absolute Maximum Ratings
Supply Voltage (V
Shutdown Voltage (V
Steady-State Output Switch Voltage (V
Feedback Voltage [Adjustable] (V
Storage Temperature (T
ESD, Note 5
Electrical Characteristics
V
Parameter
Feedback Voltage
Maximum Duty Cycle
Output Leakage Current
Quiescent Current
Frequency Fold Back
Oscillator Frequency
Saturation Voltage
Short Circuit Current Limit
Standby Quiescent Current
Shutdown Input Logic Level
Shutdown Input Current
Thermal Shutdown @ T
Note 1.
Note 2.
Note 3.
Note 4.
Note 5.
Note 6.
Note 7.
Note 8.
February 2001
MIC4681
IN
= 12V; I
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
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
Short circuit protection is guaranteed to 30V max.
IN(min)
LOAD
= V
A
= 500mA; T
= +85 C, guaranteed by design, and characterized to T
OUT
IN
), Note 3 ...................................... +34V
+ 2.5V or 4V whichever is greater.
SHDN
J
S
) ....................... –65 C to +150 C
J
) .......................... –0.3V to +34V
= 25 C, bold values indicate –40 C
Condition
( 1%)
( 2%)
8V
V
V
V
V
I
V
V
V
regulator off
regulator on
V
V
OUT
FB
FB
IN
IN
FB
FB
SHDN
SHDN
SHDN
SHDN
) .......................... +12V
= 30V, V
= 30V, V
= 1.0V
= 1.5V
= 0V, see Test Circuit V
= 1A
V
IN
SW
= 5V (regulator off)
= V
= 5V (regulator off)
= 0V (regulator on)
(Note 1)
) .................. –1V
IN
30V, 0.1A
SHDN
SHDN
= 5V, V
= 5V, V
I
LOAD
SW
SW
IN
= 0V
= –1V
3
J
1A, V
= 30V (Note 8)
T
= +125 C.
Operating Ratings
Supply Voltage (V
Junction Temperature (T
Package Thermal Resistance (
J
OUT
+125 C, Note 7; unless noted.
= 5V
IN
) ....................................... +4V to +30V
J
) ...................................... +125 C
(Note 2)
1.217
1.205
1.193
1.180
Min
180
–10
–10
2.2
(
93
2
JC
JA
), Note 6 ............ 63 C/W
), Note 6 ........... 20 C/W
1.230
1.230
1.25
–0.5
–1.5
Typ
200
160
1.4
3.4
1.4
95
50
50
35
4
7
6
1.243
1.255
1.267
1.280
Max
500
110
220
100
1.8
4.5
0.8
20
12
1
1
MIC4681
Micrel
Units
kHz
kHz
mA
mA
%
V
V
V
V
V
A
V
V
C
A
A
A
A
A