參數(shù)資料
型號(hào)： MIC4682BM
廠商： MICREL INC
元件分類： 穩(wěn)壓器
英文描述： PRECISION CURRENT LIMIT SO-8 SUPERSWITCHER BUCK REGULATOR
中文描述： 1.1 A SWITCHING REGULATOR, 220 kHz SWITCHING FREQ-MAX, PDSO8
封裝： SOIC-8
文件頁(yè)數(shù)： 3/15頁(yè)
文件大?。?/td> 226K
代理商： MIC4682BM
October 2003
3
M0334-102203
MIC4682
Absolute Maximum Ratings
(Note 1)
Supply Voltage (V
IN
),
Note 3
........................................38V
Shutdown Voltage (V
SHDN
) ..........................
–
0.3V to +38V
Steady-State Output Switch Voltage (V
SW
) ..................
–
1V
Feedback Voltage (V
FB
)................................................12V
Current Limit Set Voltage (V
ISET
)..................... 1.23V to 7V
Ambient Storage Temperature (T
S
) .........
–
65
°
C to +150
°
C
ESD Rating,
Note 5
......................................................2kV
Micrel
Electrical Characteristics
V
IN
= 12V; I
OUT
=500mA; R
ISET
= 16.2k (1A current limit); T
J
= 25
°
C,
bold
values indicate
–
40
°
C
≤
T
J
≤
+125
°
C; unless otherwise noted.
Symbol
Parameter
Condition
Min
Typ
Max
Units
V
IN
I
IN
I
IN
Supply Voltage Range
Note 4
4
34
V
Quiescent Current
V
FB
= 1.5V
V
SHDN
= 5V (Regulator off)
V
SHDN
= V
IN
(
±
1%)
(
±
2%)
7
12
mA
Standby Quiescent Current
35
100
μ
A
1
μ
A
V
FB
Feedback Voltage
1.217
1.205
1.230
1.243
1.255
V
V
8V
≤
V
IN
≤
34V, 0.1A
≤
I
LOAD
≤
0.8A
1.193
1.180
1.230
1.267
1.280
V
V
I
LIM
f
SW
D
MAX
V
SW
I
SW
Current Limit Accuracy,
Note 7
See Test Circuit, V
OUT
= 3.6V
0.90
1
1.10
A
Oscillator Frequency
180
200
220
kHz
Maximum Duty Cycle
V
FB
= 1.0V
I
OUT
= 1A
V
IN
= 34V, V
SHDN
= 5V, V
SW
= 0V
V
IN
= 34V, V
SHDN
= 5V, V
SW
=
–
1V
Regulator Off
93
95
%
Switch Saturation Voltage
1.4
1.8
V
Switch Leakage Current
2
100
μ
A
2
10
mA
V
SHDN
Shutdown Input Logic Level
2
1.4
V
Regulator On
1.25
0.8
V
I
SHDN
Shutdown Input Current
V
SHDN
= 5V (Regulator Off)
V
SHDN
= 0V (Regulator On)
–
10
–
0.5
1
μ
A
–
10
–
1.5
1
μ
A
T
J
Thermal Shutdown
160
°
C
Note 1.
Exceeding the absolute maximum rating may damage the device.
Note 2.
This device is not guaranteed to operate beyond its specified operating rating.
Note 3.
Absolute maximum rating is intended for voltage transients only; prolonged DC operation is not recommended.
Note 4.
V
IN(MIN)
= V
OUT
+ 2.5V or 4V whichever is greater.
Note 5.
Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5k
in series with 100pF.
Note 6.
Measured on 1.5
”
square of 1oz. copper FR4 printed circuit board connected to the device ground leads.
Note 7.
Short circuit protection is guaranteed to V
IN
= 30V max.
Operating Ratings
(Note 2)
Supply Voltage (V
IN
)
Note 4 and 7.....................
4V to 34V
Junction Temperature Range (T
J
) ...........
–
40
°
C to +125
°
C
Package Thermal Impedance
θ
JA
SOP-8,
Note 6
..............................................63
°
C/W
θ
JC
SOP-8,
Note 6
..............................................20
°
C/W
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