參數(shù)資料
型號(hào)： 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(yè)數(shù)： 4/17頁(yè)
文件大?。?/td> 153K
代理商： MIC3172YM
MIC2172/3172
Micrel, Inc.
M9999-042205
4
April 2005
Parameter
Oscillator Section
Frequency (f
O
)
Conditions
Min
Typ
Max
Units
88
85
80
100
112
115
95
kHz
kHz
%
Duty Cycle [
δ
(max)]
89
Sync Coupling Capacitor
Required for Frequency Lock
Peak-to-Peak Voltage
Required for Frequency Lock
Input Supply Voltage Section
Minimum Operating Voltage
Quiescent Current (I
Q
)
Supply Current Increase (
I
IN
)
Bold
type denotes specifications applicable to the full operating temperature range.
Note 1
Note 2
Note 3
V
PP
= 3.0V
V
PP
= 40V
C
COUPLING
= 12pF
22
2.2
2.2
51
4.7
12
120
10
30
pF
pF
V
2.7
7
9
3.0
9
20
V
3V
≤
V
IN
≤
40V, V
COMP
= 0.6V, I
SW
= 0
I
SW
= 1A, V
COMP
= 1.5V
mA
mA
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.
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
8-pin CerDIP ..............................................100
C/W
Storage Temperature .................................–65
C to 150
°
C
Soldering (10 sec.) .................................................... 300
°
C
Electrical Characteristics MIC3172
Note 1, 3. Unless otherwise specified, V
IN
= 5V.
Parameter
Reference Section
Feedback Voltage (V
FB
)
Conditions
Pin 2 tied to pin 3
Min
Typ
Max
Units
1.224
1.214
1.240
1.264
1.274
V
V
Feedback Voltage
Line Regulation
Feedback Bias Current (I
FB
)
3V
≤
V
IN
≤
40V
0.07
%/V
310
750
1100
nA
nA
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