MIC24046 Datasheet, PDF (7/27 Pages) Micrel Semiconductor – Pin-Programmable, 4.5V − 19V, 5A Step-Down Converter

Micrel, Inc.
Typical Characteristics
VVIN = VVINLDO = 12V; CVDDA= 2.2µF, CVDDP = 2.2µF, TA = 25°C, unless otherwise noted.
20
19
18
17
16
15
14
13
12
11
10
4
Operating Current (I_Q)
vs. Input Voltage
f = 790kHz
f = 565kHz
f = 400kHz
Switching
V_OUT = 1.0V
I_OUT = 0A
6 8 10 12 14 16 18 20
INPUT VOLTAGE (V)
VDD Voltage
vs. Input Voltage
5.3
I_VDDA = 0mA
5.1
4.9
I_VDDA = 10mA
4.7
4.5
4.3
4.1
4 6 8 10 12 14 16 18 20
INPUT VOLTAGE (V)
MIC24046
Low-Side Current Limit
vs. Input Voltage
10
9
I_LIM = Hi-Z
8
7
6
I_LIM = VDDA
5
I_LIM = GND
4
V_OUT = 1.2V
L = 2.2µH
3
4 6 8 10 12 14 16 18 20
INPUT VOLTAGE (V)
Enable Threshold
vs. Input Voltage
1.3
1.25
1.2
1.15
ENABLE RISING
1.1
1.05
1
ENABLE FALLING
0.95
0.9
4 6 8 10 12 14 16 18 20
INPUT VOLTAGE (V)
3
2.8
2.6
2.4
2.2
2
1.8
1.6
1.4
1.2
1
4
EN/DLY Pull-up Current
vs. Input Voltage
EN/DLY = 0V
6 8 10 12 14 16 18 20
INPUT VOLTAGE (V)
Operating Current (I_Q)
vs. Temperature
20
19
18
f = 790kHz
17
16
15
f = 565kHz
14
13
12
f = 400kHz
11
SWITCHING
V_IN = 12V
V_OUT = 1.0V
I_OUT = 0A
10
-40 -20 0 20 40 60 80 100 120 140
TEMPERATURE (°C)
FET ON Resistance
vs. Temperature
65
55
45
R_TOP
35
25
R_BOTTOM
15
5
-40 -20
V_IN = 12V
0 20 40 60 80 100 120 140
TEMPERATURE (°C)
EA Transconductance
vs. Temperature
2
1.8
1.6
1.4
1.2
1
0.8
0.6
-40 -20
V_IN = 12V
V_OUT = 1.0V
0 20 40 60 80 100 120 140
TEMPERATURE (°C)
EA Output Current
vs. Temperature
800
600
400
200
SINKING
0
-200
SOURCING
-400
-600
-800
-40 -20
V_IN = 12V
0 20 40 60 80 100 120 140
TEMPERATURE (°C)
October 14, 2015
7
Revision 1.1