mic4690 Micrel Semiconductor, mic4690 Datasheet - Page 5

• Manufacturer Part Number: mic4690
• Description: Mic4690 500khz 1a Superswitcher? Buck Regulator
• Manufacturer: Micrel Semiconductor

Typical Characteristics
April 2005
MIC4690
1.243
1.241
1.239
1.237
1.235
1.233
1.231
1.229
1.227
1.225
1.223
5.025
5.020
5.015
5.010
5.005
5.000
80
70
60
50
40
30
20
10
-40 -20 0 20 40 60 80 100120140
0
0
0
V
I
OUT
0.2 0.4 0.6 0.8
OUT
5 10 15 20 25 30 35 40
OUTPUT CURRENT (A)
Reference Voltage
vs. Input Voltage
INPUT VOLTAGE (V)
Load Regulation
vs. Temperature
TEMPERTURE (°C)
= 1A
= 5V
Efficiency
V
V
I
V
V
OUT
IN
OUT
IN
OUT
= 12V
= 12V
= 100mA
= 5V
= 5V
1
1.2 1.4
1.6
1.4
1.2
0.8
0.6
0.4
0.2
5.06
5.04
5.02
5.00
4.98
4.96
1
0
600
500
400
300
200
100
-40
8.6
8.5
8.4
8.3
8.2
8.1
7.9
7.8
7.7
7.6
-40 -20 0 20 40 60 80 100120140
-50
8
0
0
Shutdown Hysteresis
V
V
I
OUT
TEMPERATURE (°C)
IN
OUT
5 10 15 20 25 30 35 40
0
vs. Temperature
Quiescent Current
= 12.0V
TEMPERATURE (°C)
INPUT VOLTAGE (V)
vs. Temperature
= 0
Line Regulation
= 5.0V
0
Frequency vs.
Temperature (°C)
Temperature
40
5
80
V
V
I
V
V
I
50
OUT
OUT
IN
OUT
IN
OUT
V
V
I
= 12V
= 12.0V
OUT
= 100mA
= 100mA
IN
OUT
120
= 5.0V
= 5V
= 12V
100
= 500mA
OFF
ON
= 5V
160
150
300
250
200
150
100
3.5
3.0
2.5
2.0
1.5
1.0
0.5
50
80
78
76
74
72
70
68
-50
-40 -20 0 20 40 60 80 100120140
0
0
0
V
V
V
V
0.2 0.4 0.6 0.8
IN
OUT
SHDN
OUT
Frequency Foldback
OUTPUT CURRENT (A)
Shutdown Current
= 12.0V
TEMPERATURE (°C)
vs. Temperature
vs. Temperature
Output Current
= 5V
= 5.0V
0
Temperature (°C)
Efficiency vs.
= V
IN
= 12V
50
V
V
I
OUT
IN
OUT
= 12V
= 100mA
= 5V
100
1
1.2 1.4
MIC4690
150
Micrel