mic4682 Micrel Semiconductor, mic4682 Datasheet - Page 5

• Manufacturer Part Number: mic4682
• Description: Mic4682 Precision Current Limit So-8 Superswitcher? Buck Regulator
• Manufacturer: Micrel Semiconductor

Typical Characteristics
T
Micrel, Inc.
June 2007
A
= 25°C unless otherwise noted.
1.8
1.6
1.4
1.2
0.8
0.6
0.4
0.2
2
1
0
10 15 20 25 30 35 40 45 50
V
L = 68µH
R3 = 10M
OUT
vs. R
= 1.0V (Pulsed Load)
Current Limit
ISET
V
V
V
IN
IN
IN
R
ISET
= 4V
= 5V
= 12V
at T
(kΩ)
J
= 125°C
V
V
V
IN
IN
IN
= 24V
= 30V
= 34V
1.8
1.6
1.4
1.2
0.8
0.6
0.4
0.2
vs. Input Voltageat T
2
1
0
4 7 10 13 16 19 22 25 28 31 34
Short Circuit Current Limit
R
R
R
ISET
ISET
ISET
R
ISET
=10k
=15.8k
INPUT VOLTAGE (V)
=25k
=20k
L = 68µH
R3 = 10M
V
OUT
~0V (Pulsed Load)
5
R
R
R
ISET
ISET
ISET
J
= –40°C
=30k
=40k
=50k
1.8
1.6
1.4
1.2
0.8
0.6
0.4
0.2
80
70
60
50
40
30
20
10
2
1
0
vs. Input Voltageat T
0
4
0
Short Circuit Current Limit
R
R
ISET
ISET
8
vs. Output Current
OUTPUT CURRENT (A)
0.4
V
V
INPUT VOLTAGE (V)
=10k
IN
IN
=15.8k
12 16 20 24 28 32
L = 68µH
R3 = 10M
V
V
= 30V
= 12V
Efficiency
OUT
IN
0.8
= 6V
~0V (Pulsed Load)
V
1.2
V
IN
OUT
R
R
R
R
R
= 5V
M9999-061507
ISET
ISET
ISET
ISET
ISET
J
= 2.5V
1.6
= 25°C
=20k
=25k
=30k
=40k
=50k
MIC4682
2