MIC2202 Datasheet, PDF (14/18 Pages) Micrel Semiconductor – HIGH EFFICIENCY 2MHZ SYNCHRONOUS BUCK CONVERTER 1UP STABLE PWM REGULATOR

MIC2202
MIC2202BMM with 4.7µH Inductor and 1µF 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 = 4.7µH}
-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 = 4.7µH
-30
-72
-108
1x10² 1x10³ 1x10⁴ 1x10⁵ 1x10⁶ 1x10⁷
FREQUENCY (Hz)
Micrel
Load Transient
L = 4.7µH
C = 1µF
V_IN = 3.6V
V_OUT = 1.8V
TIME (40µs/div.)
Efficiency 3.3V_OUT
100
4.2V_IN
95
90 5V_IN
85
80
75
L = 4.7µH
C_OUT = 1µF
70
0 0.1 0.2 0.3 0.4 0.5 0.6
OUTPUT CURRENT (A)
Efficiency 1.5V_OUT
95
90
4.2V_IN
85
80
75
3V_IN
70 L = 4.7µH
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 3.6VIN}
L = 4.7µH
C_OUT = 1µF
0.1 0.2 0.3 0.4 0.5 0.6
OUTPUT CURRENT (A)
Efficiency 1.2V_OUT
95
90
4.2V_IN
85
80
75
3V_IN
70
L = 4.7µH
65 ^COUT ^{= 1µF}
3.6V_IN
60
0 0.1 0.2 0.3 0.4 0.5 0.6
OUTPUT CURRENT (A)
Efficiency 1.8V_OUT
95
90
85
80
3V_IN
4.2V_IN
75
70 L = 4.7µH
C_OUT = 1µF
65
3.6V_IN
60
0 0.1 0.2 0.3 0.4 0.5 0.6
OUTPUT CURRENT (A)
Vsw-Vripple
L = 4.7µH V_IN = 3.6V
C = 1µF V_OUT = 1.8V
I_OUT = 600mA
TIME (400ns/div.)
M9999-052104
14
May 2004