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)： 3/17頁(yè)
文件大?。?/td> 153K
代理商： MIC3172YM
April 2005
3
M9999-042205
MIC2172/3172
Absolute Maximum Ratings MIC2172
Input Voltage .................................................................40V
Switch Voltage ..............................................................65V
Sync Current ..............................................................50mA
Feedback Voltage (Transient, 1ms) ...........................
±
15V
Operating Temperature Range
8-pin PDIP.................................................–40 to +85
°
C
8-pin SOIC ................................................–40 to +85
°
C
Micrel, Inc.
Electrical Characteristics MIC2172
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
1.220
1.214
1.240
1.264
1.274
0.03
V
V
Feedback Voltage
Line Regulation
Feedback Bias Current (I
FB
)
3V
≤
V
IN
≤
40V
%/V
310
750
1100
nA
nA
Error Amplifier Section
Transconductance (
I
COMP
/
V
FB
)
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
Junction Temperature ..............................–55
°
C to +150
°
C
Thermal Resistance
θ
JA
8-pin PDIP .................................................130
°
C/W
8-pin SOIC .................................................120
C/W
Storage Temperature ...............................–65
C to +150
°
C
Soldering (10 sec.) ..................................................+300
°
C
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