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參數(shù)資料
| 型號： | 83F5958 |
| 英文描述： | IC-1.25A SWITCHING REGULATOR |
| 中文描述： | 集成電路1.25A的開關穩(wěn)壓器 |
| 文件頁數(shù)： | 4/16頁 |
| 文件大小： | 129K |
| 代理商： | 83F5958 |
MIC2172/3172
Micrel
4-16
1997
Parameter
Conditions
Min
Typ
Max
Units
Oscillator Section
Frequency (f
O
)
88
85
100
112
115
kHz
kHz
Duty Cycle [
δ
(max)]
80
89
95
%
Sync Coupling Capacitor
Required for Frequency Lock
V
PP
= 3.0V
V
PP
= 40V
C
COUPLING
= 12pF
22
2.2
51
4.7
120
10
pF
pF
Peak-to-Peak Voltage
Required for Frequency Lock
2.2
12
30
V
Input Supply Voltage Section
Minimum Operating Voltage
2.7
3.0
V
Quiescent Current (I
Q
)
Supply Current Increase (
I
IN
)
3V
≤
V
IN
≤
40V, V
COMP
= 0.6V, I
SW
= 0
I
SW
= 1A, V
COMP
= 1.5V
7
9
mA
9
20
mA
Bold
type denotes specifications applicable to the full operating temperature range.
Note 1
Devices are ESD sensitive. Handling precautions required.
Note 2
For duty cycles (
δ
) between 50% and 95%, minimum guaranteed switch current is given by I
CL
= 0.833 (2-
δ
) for the MIC3172.
Absolute Maximum Ratings MIC3172
Input Voltage .................................................................40V
Switch Voltage ..............................................................65V
Enable Voltage..............................................................40V
Feedback Voltage (Transient, 1ms) ...........................
±
15V
Operating Temperature Range
8-pin PDIP.................................................–40 to +85
°
C
8-pin SOIC ................................................–40 to +85
°
C
8-pin CerDIP ...........................................–55 to +125
°
C
Junction Temperature ................................ –55
°
C to 150
°
C
Thermal Resistance
θ
JA
8-pin PDIP .................................................130
°
C/W
θ
JA
8-pin SOIC .................................................120
°
C/W
θ
JA
8-pin CerDIP ..............................................100
°
C/W
Storage Temperature .................................–65
°
C to 150
°
C
Soldering (10 sec.) .................................................... 300
°
C
Electrical Characteristics MIC3172
Note 1. Unless otherwise specified, V
IN
= 5V.
Parameter
Conditions
Min
Typ
Max
Units
Reference Section
Pin 2 tied to pin 3
Feedback Voltage (V
FB
)
1.224
1.214
1.240
1.264
1.274
V
V
Feedback Voltage
Line Regulation
3V
≤
V
IN
≤
40V
0.07
%/V
Feedback Bias Current (I
FB
)
310
750
1100
nA
nA
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