MIC2202 Datasheet, PDF (16/18 Pages) Micrel Semiconductor – HIGH EFFICIENCY 2MHZ SYNCHRONOUS BUCK CONVERTER 1UP STABLE PWM REGULATOR

MIC2202
MIC2202BMM with 1µH Inductor and 4.7µF 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
-30 ^{L = 1µH}
-72
-108
1x10² 1x10³ 1x10⁴ 1x10⁵ 1x10⁶ 1x10⁷
FREQUENCY (Hz)
Bode Plot
70
252
60
216
Gain
50
180
40
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 = 1µH
C = 4.7µF
V_IN = 3.6V
V_OUT = 1.8V
TIME (40µs/div.)
100
95
90
85
80
75
70
65
60
55
50
0
Efficiency 3.3V_OUT
4.2V_IN
5V_IN
L = 1µH
C_OUT = 4.7µF
0.1 0.2 0.3 0.4 0.5 0.6
OUTPUT CURRENT (A)
Efficiency 1.5V_OUT
90
85
4.2V_IN
80
75
70
3V_IN
65
60
3.6V_IN
55
50
L = 1µH
45
C_OUT = 4.7µF
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 = 4.7µF
0.1 0.2 0.3 0.4 0.5 0.6
OUTPUT CURRENT (A)
Efficiency 1.2V_OUT
90
85
4.2V_IN
80
75
70
3V_IN
65
60
3.6V_IN
55
L = 1µH
50
C_OUT = 4.7µF
45
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
3.6V_IN
70
65
4.2V_IN
3V_IN
60
55
50
L = 1µH
C_OUT = 4.7µF
45
40
0 0.1 0.2 0.3 0.4 0.5 0.6
OUTPUT CURRENT (A)
Vsw-Vripple
L = 1µH V_IN = 3.6V
C = 4.7µF V_OUT = 1.8V
I_OUT = 600mA
TIME (400ns/div.)
M9999-052104
16
May 2004