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參數(shù)資料
| 型號： | MIC3172YM |
| 廠商： | MICREL INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 500kHz and 1MHz High Efficiency 1.5A Switching Regulators; Package: SO; No of Pins: 8; Temperature Range: -40?°C to 85?°C |
| 中文描述： | 3.5 A SWITCHING REGULATOR, 115 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封裝： | LEAD FREE, SOIC-8 |
| 文件頁數(shù)： | 5/17頁 |
| 文件大?。?/td> | 153K |
| 代理商： | MIC3172YM |
April 2005
5
M9999-042205
MIC2172/3172
Micrel, Inc.
Parameter
Error Amplifier Section
Transconductance (
I
COMP
/
V
FB
)
Conditions
Min
Typ
Max
Units
I
COMP
=
±
25
μ
A
3.0
2.4
500
125
100
1.8
0.25
0.8
0.6
3.9
6.0
7.0
2000
350
400
2.3
0.52
1.08
1.25
μ
A/mV
μ
A/mV
V/V
μ
A
μ
A
V
V
V
V
Voltage Gain (
V
COMP
/
V
FB
)
Output Current
0.9V
≤
V
COMP
≤
1.4V
V
COMP
= 1.5V
800
175
Output Swing
High Clamp, V
FB
= 1V
Low Clamp, V
FB
= 1.5V
Duty Cycle = 0
2.1
0.35
0.9
Compensation Pin
Threshold
Output Switch Section
ON Resistance
I
SW
= 1A, V
FB
= 0.8V
0.76
1
A
A
A
V
1.1
3
3.5
2.5
Current Limit
Duty Cycle = 50%, T
J
25
°
C
Duty Cycle = 50%, T
J
< 25
°
C
Duty Cycle = 80%
Note 2
3V
≤
V
IN
≤
40V
I
SW
= 5mA
1.25
1.25
1
65
Breakdown Voltage (BV)
75
Oscillator Section
Frequency (f
O
)
88
85
80
100
112
115
95
kHz
kHz
%
Duty Cycle [
δ
(max)]
89
Input Supply Voltage Section and Enable Section
Minimum Operating Voltage
Quiescent Current (I
Q
)
2.7
7
0.1
9
3.0
9
5
20
V
3V
V
IN
≤
40V, V
COMP
= 0.6V, I
SW
= 0
Shutdown, V
EN
= 0V
I
SW
= 1A, V
COMP
= 1.5V
mA
μ
A
mA
Quiescent Current Increase (
I
IN
)
Enable Input Threshold
Enable Input Current
0.4
–1
1.2
0
2
2.4
1
10
V
μ
A
μ
A
V
EN
= 0V
V
EN
= 2.4V
Bold
type denotes specifications applicable to the full operating temperature range.
Note 1
Note 2
Note 3
Devices are ESD sensitive. Handling precautions required.
For duty cycles (
) between 50% and 95%, minimum guaranteed switch current is given by I
CL
= 0.833 (2-
δ
) for the MIC3172.
Specification for packaged product only.
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