MIC2202 Datasheet, PDF (10/18 Pages) Micrel Semiconductor – HIGH EFFICIENCY 2MHZ SYNCHRONOUS BUCK CONVERTER 1UP STABLE PWM REGULATOR

MIC2202
MIC2202BMM with 2.2µH Inductor and 1µF Output Capacitor
Bode Plot
70
252
60
Gain
216
50
180
40
Phase
144
30
108
20
72
10
36
0 ^5VIN
0
-10 ^1.8VOUT
-36
-20
L = 1µH
C = 2.2µF
-72
-30
-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 = 2.2µH
C = 1µF
V_IN = 3.6V
V_OUT = 1.8V
TIME (40µs/div.)
100
95
90
85
80
75
70
65
60
0
Efficiency 3.3V_OUT
4.2V_IN
5V_IN
L = 2.2µH
C_OUT = 1µF
0.1 0.2 0.3 0.4 0.5 0.6
OUTPUT CURRENT (A)
Efficiency 1.5V_OUT
100
95
3V_IN
90
85
4.2V_IN
80
75
70
L = 2.2µH
C_OUT = 1µF
65
3.6V_IN
60
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
4.2V_IN
3.6V_IN
L = 2.2µH
C_OUT = 1µF
0.1 0.2 0.3 0.4 0.5 0.6
OUTPUT CURRENT (A)
Efficiency 1.2V_OUT
100
95
3V_IN
90
85
4.2V_IN
80
75
L = 2.2µH
70 _{COUT = 1µF}
65
3.6V_IN
60
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 1.8V_OUT
3V_IN
4.2V_IN
3.6V_IN
L = 2.2µH
C_OUT = 1µF
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
10
May 2004