參數(shù)資料
型號(hào): 83F5958
英文描述: IC-1.25A SWITCHING REGULATOR
中文描述: 集成電路1.25A的開關(guān)穩(wěn)壓器
文件頁數(shù): 3/16頁
文件大小: 129K
代理商: 83F5958
1997
4-15
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
4
Electrical Characteristics MIC2172
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
)
1.220
1.214
1.240
1.264
1.274
V
V
Feedback Voltage
Line Regulation
3V
V
IN
40V
0.03
%/V
Feedback Bias Current (I
FB
)
310
750
1100
nA
nA
Error Amplifier Section
Transconductance (
I
COMP
/
V
FB
)
I
COMP
=
±
25
μ
A
3.0
2.4
3.9
6.0
7.0
μ
A/mV
μ
A/mV
Voltage Gain (
V
COMP
/
V
FB
)
Output Current
0.9V
V
COMP
1.4V
V
COMP
= 1.5V
500
800
2000
V/V
125
100
175
350
400
μ
A
μ
A
Output Swing
High Clamp, V
FB
= 1V
Low Clamp, V
FB
= 1.5V
Duty Cycle = 0
1.8
0.25
2.1
0.35
2.3
0.52
V
V
Compensation Pin
Threshold
0.8
0.6
0.9
1.08
1.25
V
V
Output Switch Section
ON Resistance
I
SW
= 1A, V
FB
= 0.8V
0.76
1
1.1
Current Limit
Duty Cycle = 50%, T
J
25
°
C
Duty Cycle = 50%, T
J
< 25
°
C
Duty Cycle = 80%
Note 2
1.25
1.25
1
3
A
A
A
3.5
2.5
Breakdown Voltage (BV)
3V
V
IN
40V
I
SW
= 5mA
65
75
V
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
Storage Temperature ...............................–65
°
C to +150
°
C
Soldering (10 sec.) ..................................................+300
°
C
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