參數(shù)資料
型號： MIC4684BM
廠商： MICREL INC
元件分類： 穩(wěn)壓器
英文描述： 150000 SYSTEM GATE 2.5 VOLT FPGA - NOT RECOMMENDED for NEW DESIGN
中文描述： SWITCHING REGULATOR, 225 kHz SWITCHING FREQ-MAX, PDSO8
封裝： SOP-8
文件頁數(shù)： 3/16頁
文件大?。?/td> 213K
代理商： MIC4684BM
July 2001
3
MIC4684
MIC4684
Absolute Maximum Ratings
(Note 1)
Supply Voltage (V
IN
),
Note 3 ......................................
+34V
Enable Voltage (V
EN
) ....................................
–
0.3V to +V
IN
Steady-State Output Switch Voltage (V
SW
) .......
–
1V to V
IN
Feedback Voltage (V
FB
)..............................................+12V
Storage Temperature (T
S
) .......................
–
65
°
C to +150
°
C
ESD Rating ..............................................................
Note 3
Micrel
Electrical Characteristics
V
IN
= V
EN
=
12V, V
OUT
= 5V; I
OUT
= 500mA; T
A
= 25
°
C, unless otherwise noted.
Bold
values indicate
–
40
°
C
≤
T
J
≤
+125
°
C.
Parameter
Condition
Min
Typ
Max
Units
Feedback Voltage
(
±
2%)
(
±
3%)
1.210
1.198
1.235
1.260
1.272
V
V
8V
≤
V
IN
≤
30V, 0.1A
≤
I
LOAD
≤
1A, V
OUT
= 5V
1.186
1.173
1.235
1.284
1.297
V
V
Feedback Bias Current
50
nA
Maximum Duty Cycle
V
FB
= 1.0V
V
IN
= 30V, V
EN
= 0V, V
SW
= 0V
V
IN
= 30V, V
EN
= 0V, V
SW
=
–
1V
V
FB
= 1.5V
V
FB
= 1.5V, V
SW
= 0V
I
BS
= 10mA, V
FB
= 1.5V, V
SW
= 0V
V
FB
= 0V
94
%
Output Leakage Current
5
500
μ
A
1.4
20
mA
Quiescent Current
6
12
mA
Bootstrap Drive Current
250
380
mA
Bootstrap Voltage
5.5
6.2
V
Frequency Fold Back
30
50
120
kHz
Oscillator Frequency
180
200
225
kHz
Saturation Voltage
I
OUT
= 1A
V
FB
= 0V, See Test Circuit
V
EN
= 0V
regulator on
0.59
V
Short Circuit Current Limit
2.2
A
Shutdown Current
150
μ
A
Enable Input Logic Level
2
V
regulator off
0.8
V
Enable Pin Input Current
V
EN
= 0V (regulator off)
V
EN
= 12V (regulator on)
16
50
μ
A
–
1
–
0.83
mA
Thermal Shutdown @ T
J
160
°
C
Note 1.
Note 2.
Note 3.
Note 4.
Exceeding the absolute maximum rating may damage the device.
The device is not guaranteed to function outside its operating rating.
Devices are ESD sensitive. Handling precautions recommended.
2.5V of headroom is required between V
IN
and V
OUT
. The headroom can be reduced by implementing a feed-forward diode a seen on the 5V
to 3.3V circuit on page 1.
Measured on 1" square of 1 oz. copper FR4 printed circuit board connected to the device ground leads.
Note 5.
Operating Ratings
(Note 2)
Supply Voltage (V
IN
)
Note 4 ...........................
+4V to +30V
Ambient Temperature (T
A
).........................
–
40
°
C to +85
°
C
Junction Temperature (T
J
) .......................
–
40
°
C to +125
°
C
Package Thermal Resistance
θ
JA
,
Note 5 ..........................................................
75
°
C/W
θ
JC
,
Note 5..........................................................
25
°
C/W
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