MIC2800 Datasheet, PDF (8/21 Pages) Micrel Semiconductor – Digital Power Management IC 2MHz, 600mA DC/DC w/Dual 300mA/300mA Low VIN LDOs

Micrel, Inc.
Typical Characteristics (DC/DC PWM Mode)
DC/DC 1.87V_OUT Efficiency
100
95 _3V
90
3.6V
85
80
4.2V
75
70
65
60
L = 2.2µH
55
C_OUT = 2.2µF
/LowQ = V_IN
50
0 100 200 300 400 500 600
OUTPUT CURRENT (mA)
DC/DC Enable Threshold
vs. Supply Voltage
1000
950
900
850
ON
800
750
700
OFF
650
600
550
5020.7
C_OUT = 2.2µF
/LowQ = V_IN
3.4 4.1 4.8 5.5
SUPPLY VOLTAGE (V)
DC/DC 1.8V_OUT Efficiency
100
95
3V
90
3.6V
85
4.2V
80
75
70
65
60
L = 2.2µH
55
C_OUT = 2.2µF
50
/LowQ = V_IN
0 100 200 300 400 500 600
OUTPUT CURRENT (mA)
DC/DC Turn-On Delay
vs. Supply Voltage
100
95
90
85
80
75
70
65
60
55
C_OUT = 2.2µF
/LowQ = V_IN
502.7 _{3.2 3.7 4.2 4.7 5.2}
SUPPLY VOLTAGE (V)
MIC2800
1400
1200
1000
800
600
400
200
0
DC/DC Current Limit
vs. Temperature
C_OUT = 2.2µF
C_BYP = 0.1µF
/LowQ = V_IN
EN1 = EN2 = V_IN
20 40 60 80
TEMPERATURE (°C)
June 2006
8
M9999-061406
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