MIC2169_09 Datasheet, PDF (5/15 Pages) Micrel Semiconductor – 500kHz PWM Synchronous Buck Control IC

MIC2169
Typical Characteristics
V_IN = 5V
PWM Mode Supply Current
vs. Temperature
2.9
2.7
2.5
2.3
2.1
1.9
1.7
1.5
1.3
1.1
0.9
0.7
0.5
-40 -20 0 20 40 60 80 100120140
TEMPERATURE (°C)
0.806
V_FB vs. Temperature
0.804
0.802
0.800
0.798
0.796
0.794
0.792
-60 -30 0 30 60 90 120 150
TEMPERATURE (°C)
V_DD Line Regulation
vs. Temperature
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
-60 -30 0 30 60 90 120 150
TEMPERATURE (°C)
Current Limit Foldback
4
3
2
1 _{Top MOSFET = Si4800}
R_CS = 1kΩ
0
0 2 4 6 8 10
I_LOAD (A)
March 2009
Micrel
PWM Mode Supply Current
vs. Supply Voltage
2.0
1.5
1.0
0.5
0
5
10
15
SUPPLY VOLTAGE (V)
V_DD Line Regulation
6
5
4
3
2
1
0
0
5
10
15
V_IN (V)
Oscillator Frequency
vs. Temperature
550
540
530
520
510
500
490
480
470
460
450
-60 -30 0 30 60 90 120 150
TEMPERATURE (°C)
Overcurrent Trip Point
vs. Temperature
260
240
220
200
180
160
140
120
100
-60 -30 0 30 60 90 120 150
TEMPERATURE (°C)
5
0.8010
V_FB Line Regulation
0.8005
0.8000
0.7995
0.7990
0.7985
0.7980
0
5
10
15
V_IN (V)
V_DD Load Regulation
5.02
5.00
4.98
4.96
4.94
4.92
4.90
0
5 10 15 20 25 30
LOAD CURRENT (mA)
Oscillator Frequency
vs. Supply Voltage
1.5
1.0
0.5
0
-0.5
-1.0
-1.5
0
5
10
15
V_IN (V)
M9999-032409