MIC2172 データシートの表示（PDF） - Micrel
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MIC2172 Datasheet PDF : 17 Pages
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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.
Junction Temperature .............................. –55°C to +150°C
Thermal Resistance
θJA 8-pin PDIP ................................................. 130°C/W
θJA 8-pin SOIC ................................................. 120°C/W
Storage Temperature ............................... –65°C to +150°C
Soldering (10 sec.) .................................................. +300°C
Electrical Characteristics MIC2172 Note 1, 3. Unless otherwise specified, VIN = 5V.
Parameter
Conditions
Min
Reference Section
Pin 2 tied to pin 3
Feedback Voltage (VFB)
1.220
1.214
Feedback Voltage
Line Regulation
3V ≤ VIN ≤ 40V
Feedback Bias Current (IFB)
Error Amplifier Section
Transconductance (∆ICOMP/∆VFB) ∆ICOMP = ±25µA
Voltage Gain (∆VCOMP/∆VFB)
Output Current
0.9V ≤ VCOMP ≤ 1.4V
VCOMP = 1.5V
Output Swing
Compensation Pin
Threshold
Output Switch Section
ON Resistance
High Clamp, VFB = 1V
Low Clamp, VFB = 1.5V
Duty Cycle = 0
ISW = 1A, VFB = 0.8V
3.0
2.4
500
125
100
1.8
0.25
0.8
0.6
Current Limit
Duty Cycle = 50%, TJ ≥ 25°C
1.25
Duty Cycle = 50%, TJ < 25°C
1.25
Duty Cycle = 80% Note 2
1
Breakdown Voltage (BV)
3V ≤ VIN ≤ 40V
65
ISW = 5mA
Typ
1.240
310
3.9
800
175
2.1
0.35
0.9
0.76
75
Max Units
1.264 V
1.274 V
0.03 %/V
750 nA
1100 nA
6.0
7.0
2000
350
400
2.3
0.52
1.08
1.25
µA/mV
µA/mV
V/V
µA
µA
V
V
V
V
1
Ω
1.1
Ω
3
A
3.5
A
2.5
A
V
April 2005
3
M9999-042205
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