MIC22950 Datasheet, PDF (5/22 Pages) Micrel Semiconductor – 10A Integrated Switch Synchronous Buck Regulator with Frequency Programmable to 2MHz

Micrel, Inc.
Typical Characteristics (Continued)
650
600
550
500
450
400
350
300
2.5
Switching Frequency
vs. Input Voltage
CF = 390pF
3 3.5 4 4.5 5 5.5
INPUT VOLTAGE (V)
Input Voltage UVLO
vs. Temperature
2.8
2.7
V_IN = (ON)
2.6
2.5
2.4
V_IN = (OFF)
2.3
2.2
-40 -20
0 20 40 60 80 100 120
TEM PETATURE (°C)
16
14
12
10
8
6
4
2
0
2
RDSon
vs. Input Voltage
RDS_ON (P-Channel)
RDS_ON (N-Channel)
T_CASE = 25°C
3
4
5
6
INPUT VOLTAGE (V)
2000
1800
1600
1400
1200
1000
800
600
400
200
0
0
Output Voltage
vs. RC Voltage
V_OUT(NOM) = 1.8V
200 400 600 800 1000
RC VOLTAGE (mV)
Efficiency vs. Load Current
(V_OUT=1.8V)
100
95
90
V_IN = 3.6V
85
80
75
V_IN = 5V
70
65
V_IN = 2.6V
T_CASE = 25°C
60
0
2
4
6
8
10
LOAD CURRENT (A)
Efficiency vs. Load Current
(V_OUT=3.3V)
100
95
90
85
80
75
70
V_IN = 5V
65
T_CASE = 25°C
60
0
2
4
6
8
10
LOAD CURRENT (A)
MIC22950
RDSon
vs. Temperature
18
16
14
RDS_ON (P-Channel)
12
10
8
6
RDS_ON (N-Channel)
4
2
0
-40 -20
0 20 40 60 80 100 120
TEMPETATURE (°C)
Efficiency vs. Load Current
(V_OUT=1.2V)
100
95
V_IN = 3.6V
90
85
V_IN = 2.6V
80
75
V_IN = 5V
70
65
T_CASE = 25°C
60
0
2
4
6
8
10
LOAD CURRENT (A)
February 2010
5
M9999-021910-B