MIC4690 Datasheet, PDF (5/12 Pages) Micrel Semiconductor – 500kHz 1A SuperSwitcher Buck Regulator

MIC4690
Typical Characteristics
1.243
Reference Voltage
vs. Temperature
1.241
1.239
1.237
1.235
1.233
1.231
1.229
1.227
1.225
V_IN = 12V
V_OUT = 5V
I_OUT = 100mA
1.22-340 _{-20 0 20 40 60 80 100120140}
TEMPERTURE (°C)
Efficiency
vs. Input Voltage
80
70
60
50
40
30
20 ^V_OUT ^{= 5V}
10 ^{IOUT = 1A}
00 _{5 10 15 20 25 30 35 40}
INPUT VOLTAGE (V)
5.025
5.020
Load Regulation
V_IN = 12V
V_OUT = 5V
5.015
5.010
5.005
5.0000 _{0.2 0.4 0.6 0.8 1 1.2 1.4}
OUTPUT CURRENT (A)
June 2001
Quiescent Current
vs. Temperature
8.6
8.5 ^V_IN ^{= 12.0V}
8.4 ^VOUT ^{= 5.0V}
8.3 ^IOUT ^{= 0}
8.2
8.1
8
7.9
7.8
7.7
7.-640 _{-20 0 20 40 60 80 100120140}
TEMPERATURE (°C)
600
500
400
300
200
100
-050
Frequency vs.
Temperature
V_IN = 12V
V_OUT = 5V
I_OUT = 100mA
0
50 100 150
Temperature (°C)
Line Regulation
5.06
5.04
5.02
5.00
4.98
4.960
V_IN = 12V
V_OUT = 5V
I_OUT = 500mA
5 10 15 20 25 30 35 40
INPUT VOLTAGE (V)
Shutdown Hysteresis
vs. Temperature
1.6
OFF
1.4
1.2
ON
1
0.8
0.6
0.4
0.2
0
-40
V_IN = 12.0V
V_OUT = 5.0V
I_OUT = 100mA
0 40 80 120 160
TEMPERATURE (°C)
5
Micrel
Efficiency vs.
Output Current
80
78
76
74
72
70 ^{VIN = 12.0V}
V_OUT = 5.0V
680 _{0.2 0.4 0.6 0.8 1 1.2 1.4}
OUTPUT CURRENT (A)
Frequency Foldback
vs. Temperature
300
250
200
150
100
50
-050
V_IN = 12V
V_OUT = 5V
I_OUT = 100mA
0
50 100 150
Temperature (°C)
Shutdown Current
vs. Temperature
3.5
3.0
V_SHDN
=
V
IN
=
12V
V = 5V
OUT
2.5
2.0
1.5
1.0
0.5
-040 -20 0 20 40 60 80 100120140
TEMPERATURE (°C)
MIC4690