MIC2202 Datasheet, PDF (12/18 Pages) Micrel Semiconductor – HIGH EFFICIENCY 2MHZ SYNCHRONOUS BUCK CONVERTER 1UP STABLE PWM REGULATOR

MIC2202
MIC2202BMM with 1µH Inductor and 2.2µF Output Capacitor
Bode Plot
70
252
60
Gain
216
50
180
40
Phase
144
30
108
20
72
10
36
0
0
-10 ^5VIN
-36
-20 ^1.8VOUT
-72
-30 ^{L = 1µH}
-108
1x10² 1x10³ 1x10⁴ 1x10⁵ 1x10⁶ 1x10⁷
FREQUENCY (Hz)
Bode Plot
70
252
60
Gain
50
40
216
180
Phase
144
30
108
20
72
10
36
0
0
-10 ^3.6VIN
-36
-20 ^1.8VOUT
L = 1µH
-30
-72
-108
1x10² 1x10³ 1x10⁴ 1x10⁵ 1x10⁶ 1x10⁷
FREQUENCY (Hz)
Micrel
Load Transient
L = 2.2µH
C = 1µF
V_IN = 3.6V
V_OUT = 1.8V
TIME (40µs/div.)
Efficiency 3.3V_OUT
100
95 ^4.2VIN
90
85
5V_IN
80
75
L = 1µH
70
C_OUT = 2.2µF
65
60
0 0.1 0.2 0.3 0.4 0.5 0.6
OUTPUT CURRENT (A)
Efficiency 1.5V_OUT
90
85 ^3VIN
80
75
70
4.2V_IN
65
3.6V_IN
60
55
50
45
L = 1µH
C_OUT = 2.2µF
40
0 0.1 0.2 0.3 0.4 0.5 0.6
OUTPUT CURRENT (A)
100
95
90
85
80
75
70
65
60
0
Efficiency 2.5V_OUT
3V_IN
3.6V_IN
4.2V_IN
L = 1µH
C_OUT = 2.2µF
0.1 0.2 0.3 0.4 0.5 0.6
OUTPUT CURRENT (A)
Efficiency 1.2V_OUT
90
85 ^3VIN
4.2V_IN
80
75
70
65
60
3.6V_IN
55
50
L = 1µH
45
C_OUT = 2.2µF
40
0 0.1 0.2 0.3 0.4 0.5 0.6
OUTPUT CURRENT (A)
Efficiency 1.8V_OUT
90
85
80
75
3V_IN
70
65
4.2V_IN
3.6V_IN
60
55
L = 1µH
50
C_OUT = 2.2µF
45
40
0 0.1 0.2 0.3 0.4 0.5 0.6
OUTPUT CURRENT (A)
Vsw-Vripple
L = 2.2µH
C = 1µF
V_IN = 3.6V
V_OUT = 1.8V
I_OUT = 600mA
TIME (400ns/div.)
M9999-052104
12
May 2004