Micrel, Inc.
MIC2800
Electrical Characteristics - DC/DC Converter
V
IN
= V
OUTDC/DC
+ 1; EN1 = V
IN
; EN2 = GND; I
OUTDC/DC
= 100mA ;L = 2.2µH; C
OUTDC/DC
= 2.2µF; T
J
= 25°C,
bold
values
indicate –40°C to + 125°C; unless noted.
Parameter
LOWQ = High (Full Power Mode)
Fixed Output Voltages
Current Limit in PWM Mode
FB pin input current (ADJ only)
Output Voltage Line Regulation
Output Voltage Load Regulation
Maximum Duty Cycle
PWM Switch ON-Resistance
Oscillator Frequency
Output Voltage Noise
C
OUT
= 2.2µF; C
BYP
= 0.1µF; 10Hz to 100KHz
-2.0
-3.0
40
0.02
0.2
55
45
120
0.3
0.6
1.5
LOWQ = Low (Light Load Mode)
Output Voltage Accuracy
Variation from nominal V
OUT
Variation from nominal V
OUT
; -40°C to +125°C
Output Voltage Temp.
Coefficient
Line Regulation
V
IN
= V
OUT
+ 1V to 5.5V; I
OUT
= 100µA
Load Regulation
Ripple Rejection
Current Limit
I
OUT
= 100µA to 50mA
f = up to 1kHz; C
OUT
= 2.2µF; C
BYP
= 0.1µF
f = 20kHz; C
OUT
= 2.2µF; C
BYP
= 0.1µF
V
OUT
= 0V
Nominal V
OUT
tolerance
V
FB
= 0.9*V
NOM
V
OUT
> 2.4V; V
IN
= V
OUT
+ 300mV to 5.5V, I
LOAD
= 100mA
V
OUT
< 2.4V; V
IN
= 2.7V to 5.5V, I
LOAD
= 100mA
20mA < I
LOAD
< 300mA
V
FB
≤
0.4V
I
SW
= 150mA V
FB
= 0.7V
FB_NOM
I
SW
= -150mA V
FB
= 1.1V
FB_NOM
-2
-3
0.75
+2
+3
1.6
5
%
%
A
nA
%/V
%/V
%
%
Ω
Ω
MHz
µV
RMS
+2.0
+3.0
%
%
ppm/C
%/V
%/V
%
dB
dB
mA
Conditions
Min
Typ
Max
Units
1
1
0.2
0.2
1.5
100
0.6
0.8
2
60
1.8
2.2
80
190
September 2007
5
M9999-090507-C
MICREL [ MICREL SEMICONDUCTOR ]
