MIC2124 Datasheet, PDF (7/24 Pages) Micrel Semiconductor – Constant Frequency, Synchronous Current Mode Buck Controller

Micrel, Inc.
Typical Characteristics
Feedback Voltage
vs. Temperature
0.805
0.804
0.803
0.802
0.801
0.800
0.799
0.798
0.797
VIN = 5V
0.796
0.795
-40 -20
0 20 40 60 80 100 120
T EM PERAT URE (ºC)
MIC2124
360
340
320
300
280
260
240
0
Switching Frequency
vs. Load
VHSD = 12V
VIN = 5V
2
4
6
8
10
OUT PUT CURRENT (A)
360
340
320
300
280
260
240
3
Switching Frequency
v s. HSD Voltage
VIN = 5V
VOUT = 1.8V
IOUT = 5A
6
9
12
15
18
VHSD VO LT AGE (V)
Switching Frequency
vs. Temperature
360
340
320
300
280
VHSD = 5V
260
VIN = 5V
240
-40 -20
0 20 40 60 80 100 120
T EMPERAT URE (°C)
Current-Limit Threshold
vs. Feedback Voltage
150
120
90
60
VIN= 5V
30
0
0
20
40
60
80 100
FEEDBACK VOTLAGE (%)
Current Limit Threshold
vs. Temperature
150
FB = 0.8V
120
90
60
FB = 0V
30
0
-40 -20
0 20 40 60 80 100 120
T EM PERAT URE (°C)
1000
800
600
400
200
0
3
Shutdown Current
v s. Input Voltage
VHSD = 12V
3.5
4
4.5
5
5.5
INPUT VO LT AG E (V)
June 2010
7
M9999-060810-D