mic4682 Micrel Semiconductor, mic4682 Datasheet - Page 3

• Manufacturer Part Number: mic4682
• Description: Mic4682 Precision Current Limit So-8 Superswitcher? Buck Regulator
• Manufacturer: Micrel Semiconductor

Absolute Maximum Ratings
Supply Voltage (V
Shutdown Voltage (V
Steady-State Output Switch Voltage (V
Feedback Voltage (V
Current Limit Set Voltage (V
Ambient Storage Temperature (T
ESD Rating
Electrical Characteristics
V
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
5. Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5kΩ in series with 100pF.
6. Measured on 1.5” square of 1oz. copper FR4 printed circuit board connected to the device ground leads.
7. Short circuit protection is guaranteed to V
Micrel, Inc.
Symbol
V
I
V
I
f
D
V
I
V
I
T
June 2007
IN
IN
LIM
SW
SW
SHDN
IN
FB
SW
SHDN
J
MAX
= 12V; I
IN(MIN)
= VOUT + 2.5V or 4V whichever is greater.
OUT
(5)
Parameter
Supply Voltage Range
Quiescent Current
Standby Quiescent Current
Feedback Voltage
Current Limit Accuracy, Note 7
Oscillator Frequency
Maximum Duty Cycle
Switch Saturation Voltage
Switch Leakage Current
Shutdown Input Logic Level
Shutdown Input Current
Thermal Shutdown
.................................................................. 2kV
= 500mA; R
IN
)
(3)
FB
SHDN
....................................................38V
) .................................................12V
)............................. –0.3V to +38V
ISET
ISET
= 16.2k (1A current limit); T
) ....................... 1.23V to 7V
s
) ...........–65°C to +150°C
IN
= 30V max.
(1)
SW
) ....................–1V
Condition
Note 4
V
V
V
(±1%)
(±2%)
8V ≤ V
See Test Circuit, V
V
I
V
V
Regulator Off
Regulator On
V
V
OUT
FB
SHDN
SHDN
FB
IN
IN
SHDN
SHDN
= 34V, V
= 34V, V
= 1.5V
= 1.0V
= 1A
= 5V (Regulator off)
= V
= 5V (Regulator Off)
= 0V (Regulator On)
IN
≤ 34V, 0.1A ≤ I
IN
SHDN
SHDN
J
= 25°C, bold values indicate –40°C< T
= 5V, V
= 5V, V
OUT
3
Operating Ratings
Supply Voltage (V
Junction Temperature Range (T
Thermal Resistance Impedance
= 3.6V
LOAD
SW
SW
SOIC (θ
SOIC (θ
= 0V
= –1V
≤ 0.8A
JA
JC
)
)
(6)
(6)
.......................................................63°C/W
.......................................................20°C/W
IN
)
(4, 7)
....................................... 4V to 34V
(2)
1.217
1.205
1.193
1.180
Min
180
–10
–10
0.9
93
4
2
J
< +125°C, unless noted.
J
)............. –40°C to +125°C
1.230
1.230
1.25
–0.5
–0.5
Typ
200
160
1.4
1.4
35
95
7
1
1
2
2
1.243
1.255
1.267
1.280
Max
100
220
100
1.1
1.8
0.8
M9999-061507
34
12
10
1
1
MIC4682
Units
kHz
mA
mA
µA
µA
µA
µA
µA
°C
%
V
V
V
V
V
A
V
V
V