MIC2171 Micrel Semiconductor, MIC2171 Datasheet - Page 3

• Manufacturer Part Number: MIC2171
• Description: 100kHz 2.5A Switching Regulator Preliminary Information
• Manufacturer: Micrel Semiconductor

MIC2171
Absolute Maximum Ratings
Input Voltage (V
Switch Voltage (V
Feedback Voltage (transient, 1ms) (V
Operating Temperature Range ...................... –40 to +85 C
Electrical Characteristics
V
Parameter
Reference Section
Feedback Voltage (V
Feedback Voltage
Line Regulation
Feedback Bias Current (I
Error Amplifier Section
Transconductance (g
Voltage Gain (A
Output Current
Output Swing
Compensation Pin
Threshold
Output Switch Section
ON Resistance
Current Limit
Breakdown Voltage (BV)
Oscillator Section
Frequency (f
Duty Cycle [ (max)]
Input Supply Voltage Section
Minimum Operating Voltage
Quiescent Current (I
Supply Current Increase ( I
General Note Devices are ESD sensitive. Handling precautions required.
Note 1
Note 2
Note 3
1997
IN
= 5V; T
Mounted vertically, no external heat sink, 1/4 inch leads soldered to PC board containing approximently 4 inch squared copper area
surrounding leads.
All ground leads soldered to approximently 2 inches squared of horizontal PC board copper area.
For duty cycles ( ) between 50% and 95%, minimum guaranteed switch current is I
A
O
= 25 C, bold values indicate –40 C
)
V
)
IN
SW
) ........................................................ 40V
Q
FB
m
)
)
) .................................................... 65V
)
FB
)
IN
)
Conditions
V
3V
V
V
0.9V
V
High Clamp, V
Low Clamp, V
Duty Cycle = 0
I
Duty Cycle = 50%, T
Duty Cycle = 50%, T
Duty Cycle = 80%, Note 3
3V
I
3V
SW
SW
I
I
COMP
COMP
FB
COMP
COMP
SW
= 2A, V
= 5mA
= 1.24V
V
V
V
FB
= 2A, V
IN
IN
IN
V
= 1.24V
= 1.24V
= 1.5V
) ................... 15V
= 25 A
COMP
40V
40V
40V, V
FB
COMP
FB
FB
= 0.8V
T
1.4V
A
= 1.5V
= 1V
COMP
= 1.5V, during swich on-time
J
J
+85 C; unless noted.
< 25 C
25 C
= 0.6V, I
4-5
SW
Junction Temperature ................................ –55 C to 150 C
Thermal Resistance
Storage Temperature ............................... –65 C to +150 C
Soldering (10 sec.) .................................................. +300 C
= 0
JA
JA
5-lead TO-220, Note 1 ................................. 45 C/W
5-lead TO-263, Note 2 ................................. 45 C/W
CL
= 1.66 (2- ) Amp (Pk).
1.220
1.214
0.25
Min
400
125
100
3.0
2.4
1.8
0.8
0.6
2.5
2.5
2.0
65
88
85
80
1.240
0.35
0.37
Typ
310
175
800
100
.06
3.9
2.1
0.9
3.6
4.0
3.0
2.7
75
90
7
9
1.264
1.274
1100
2000
Max
0.52
1.08
1.25
0.50
0.55
750
350
400
112
115
6.0
7.0
5.5
3.0
2.3
95
20
5
5
9
Micrel
Units
%/V
A/mV
A/mV
kHz
kHz
V/V
mA
mA
nA
nA
%
V
V
V
V
V
V
A
A
A
V
V
A
A
4