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MIC2171 Datasheet(PDF) 3 Page - Micrel Semiconductor

Part # MIC2171
Description  100kHz 2.5A Switching Regulator
Download  12 Pages
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Manufacturer  MICREL [Micrel Semiconductor]
Direct Link  http://www.micrel.com
Logo MICREL - Micrel Semiconductor

MIC2171 Datasheet(HTML) 3 Page - Micrel Semiconductor

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Micrel, Inc.
MIC2171
May 2007
3
M9999-051107
Absolute Maximum Ratings
Supply Voltage (VIN).......................................................40V
Switch Voltage (VSW)......................................................65V
Feedback Voltage (transient, 1ms) (VFB) .....................±15V
Lead Temperature (soldering, 10 sec.)...................... 300°C
Storage Temperature (Ts) .........................–65°C to +150°C
ESD Rating
(1)
Operating Ratings
Operating Temperature Range ................... –40°C to +85°C
Junction Temperature (TJ) ........................–55°C to +150°C
Thermal Resistance
TO-220-5 (
θJA) (2) ...............................................45°C/W
TO-263-5 (
θJA)
(3) ................................................45°C/W
Electrical Characteristics
VIN = 5V; TA = 25°C, bold values indicate –40°C< TA < +85°C, unless noted.
Parameter
Condition
Min
Typ
Max
Units
Reference Section
Feedback Voltage (VFB)
VCOMP = 1.24V
1.220
1.214
1.240
1.264
1.274
V
V
Feedback Voltage
Line Regulation
3V ≤ VIN ≤ 40V
VCOMP = 1.24V
0.6
%/V
Feedback Bias Current (IFB)
VFB = 1.24V
310
750
1100
nA
nA
Error Amplifier Section
Transconductance (gm)
∆ICOMP = ±25µA
3.0
2.4
3.9
6.0
7.0
µA/mV
µA/mV
Voltage Gain (AV)
0.9V ≤ VCOMP ≤ 1.4V
400
800
2000
V/V
Output Current
VCOMP = 1.5V
125
100
175
350
400
µA
µA
Output Swing
High Clamp, VFB = 1V
Low Clamp, VFB = 1.5V
1.8
0.25
2.1
0.35
2.3
0.52
V
V
Compensation Pin Threshold
Duty Cycle = 0
0.8
0.6
0.9
1.08
1.25
V
V
Output Switch Section
ON Resistance
ISW = 2A, VFB = 0.8V
0.37
0.50
0.55
Current Limit
Duty Cycle = 50%, TJ ≥ 25°C
Duty Cycle = 50%, TJ < 25°C
Duty Cycle = 80%, Note 4
2.5
2.5
2.5
3.6
4.0
3.0
5.0
5.5
5.0
A
A
A
Breakdown Voltage (BV)
3V ≤ VIN ≤ 40V
ISW = 5mA
65
75
V
Oscillator Section
Frequency (fO)
88
85
100
112
115
kHz
kHz
Duty Cycle [
δ(max)]
80
90
95
%
Input Supply Voltage Section
Minimum Operating Voltage
2.7
3.0
V
Quiescent Current (IQ)
3V ≤ VIN ≤ 40V, VCOMP = 0.6V, ISW = 0
7
9
mA
Supply Current Increase (∆IIN)
∆ISW = 2A, VCOMP = 1.5V, during switch on-time
9
20
mA
Notes:
1. Devices are ESD sensitive. Handling precautions recommended.
2. Mounted vertically, no external heat sink, 1/4 inch leads soldered to PC board containing approximately 4 inch squared copper area surrounding
leads.
3. All ground leads soldered to approximately 2 inches squared of horizontal PC board copper area.
4. For duty cycles (
δ) between 50% and 95%, minimum guaranteed switch current is ICL = 1.66 (2-δ) Amp (Pk).


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