MIC2810_08 Datasheet, PDF (5/18 Pages) Micrel Semiconductor – Digital Power Management IC 2MHz, 600mA DC/DC w/Dual 300mA/300mA Low VIN LDOs

Micrel, Inc.
MIC2810
Electrical Characteristics - DC/DC Converter
V_IN = V_OUTDC/DC + 1; EN = V_IN; EN2 = EN1 = 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
Conditions
Min Typ Max
LOWQ = High (Full Power Mode)
Fixed Output Voltages
Nominal V_OUT tolerance
Output Voltage Line Regulation
Output Voltage Load Regulation
Maximum Duty Cycle
PWM Switch ON-Resistance
Oscillator Frequency
Current Limit in PWM Mode
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 < 600mA
V_FB ≤ 0.4V
I_SW = 150mA V_FB = 0.7V_{FB_NOM} PMOS
I_SW = -150mA V_FB = 1.1V_{FB_NOM} NMOS
V_FB = 0.9*V_NOM
–2
+2
–3
+3
0.2
0.1
100
0.5
0.6
1.8
2
2.2
0.75
1
1.6
LOWQ = Low (Light Load Mode)
Output Voltage Accuracy
Variation from nominal V_OUT
Variation from nominal V_OUT; –40°C to +125°C
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
V_OUT = 0V
–2
+2
–3
+3
0.02
0.3
0.6
0.4
1.5
45
80
120
220
Output Voltage Noise
10Hz to 100KHz
53
Units
%
%
%/V
%
%
Ω
Ω
MHz
A
%
%
%/V
%/V
%
dB
mA
µV_RMS
February 2008
5
M9999-022008-C