MIC2124 Datasheet, PDF (5/24 Pages) Micrel Semiconductor – Constant Frequency, Synchronous Current Mode Buck Controller

Micrel, Inc.
Typical Characteristics
Efficiency
vs. Load Current
100
VOUT = 2.5V
90
80
70
VOUT = 1.5V
60
50
VIN = VHSD = 5V
40
0.1
1.0
10.0
LOAD CURRENT (A)
Output Voltage
vs. Load Current
2.60
2.55
2.50
2.45
2.40
0
VIN = VHSD = 5V
1
2
3
4
5
LOAD CURRENT (A)
MIC2124
Output Voltage Change
vs. Input Voltage
70
50
VOUT = 2.5V
30
10
-10
-30
VOUT = 0.8V
-50
-70
3.0
VIN = VHSD
IOUT = 5A
3.5
4.0
4.5
5.0
5.5
INPUT VOTLAGE (V)
Output Voltage
vs. Input Voltage
0.810
0.805
0.800
0.795
0.790
10.8
IOUT = 5A
11.4
12.0
12.6
13.2
INPUT VOTLAGE (V)
Switching Frequency
vs. Input Voltage
350
330
310
-40°C
290
25°C
270
250
3.0
85°C
VIN = VHSD
VOUT = 1.8V
IOUT = 2.5A
3.5
4.0
4.5
5.0
5.5
INPUT VOTLAGE (V)
June 2010
5
M9999-060810-D