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Micrel, Inc.
Absolute Maximum Ratings (1)
Supply Voltage (PV IN , AV IN , V IN ) ............................ 0V to 6V
Output Switch Voltage (V SW ). ...........................................6V
DAC Input Voltage (V DAC )....................................... 0V to V IN
Logic Input Voltage (V EN , V EN1 , V EN2 ) ..................... 0V to V IN
Power Dissipation (3) ...................................Internally Limited
Storage Temperature (T s ) ......................... –65°C to +150°C
ESD Rating (4) ................................................................ ±2kV
MIC2807
Operating Ratings (2)
Supply Voltage (PV IN , AV IN , V IN ) ...................... 2.7V to 5.5V
Output Voltage (V OUT ) ............................................ 0V to V IN
Enable Voltage (V EN , V EN1 , V EN2 )............................ 0V to V IN
DAC Input Voltage (V DAC ).................................... 0.1V to V IN
Junction Temperature (T J ) ........................ –40°C to +125°C
Thermal Resistance
2.5x2.8mm MLF-17 ( θ JA ) ...................................70°C/W
Electrical Characteristics (5)
DC/DC Converter
V IN = PV IN = AV IN = V EN = 3.6V; V DAC = 0.6V; V EN1 = V EN2 = 0V; L = 4.7μH; C OUT = 1μF; T A = 25°C, bold values indicate
–40°C< T J < +125°C, unless noted.
LDO1/LDO2
V IN = V EN1 = V EN2 = 3.6V; C OUTLDO1 = 2.2μF; V EN = 0V; C OUTLDO2 = 1μF; I OUT = 100μA; T A = 25°C, bold values indicate
–40°C< T J < +125°C, unless noted.
Parameter
Condition
Min
Typ
Max
Units
MIC2807
Supply Voltage Range
Total Quiescent Current
Enable Pin Threshold
V EN = V EN1 = V EN2 = 3.6V
V DAC = 0.6V (DC/DC: not switching)
Logic Low
2.7
480
5.5
0.4
V
μA
V
Enable Pin Hysteresis
Logic High
1.3
30
V
mV
Enable Pin Input Current
0.01
1
μA
Under-Voltage
(turn-on)
2.6
2.7
V
Lockout Threshold
UVLO Hysteresis
Shutdown Temperature
Shutdown Temperature
Hysteresis
85
160
20
mV
oC
oC
Total Shutdown Current V EN = V EN1 = V EN2 = 0V
1
5
μA
DC/DC Converter [V EN1 = V EN2 = 0V]
Maximum Duty Cycle
100
%
Bypass Quiescent
Current
Quiescent Current
V DAC = 1.3V
V DAC = 0.6V (regulator on, not switching)
490
360
650
450
μA
μA
Output Voltage
Output Voltage
V DAC = 0.6V, I LOAD = 0mA
3.0V< V IN < 4.5, I LOAD = 10mA
1.746
1.8
0.05
1.854
0.5
V
%/V
Line Regulation
Output Voltage
Load Regulation
Switch On-Resistance
Current Limit
0mA < I OUT < 400mA
I SW = -100mA, High-Side Switch
I SW = 100mA, Low-Side Switch
0.65
0.2
0.55
0.6
0.85
1
0.75
0.85
1.6
%
?
?
A
(Peak SW Current)
Frequency
1.8
2
2.2
MHz
February 2008
4
M9999-022008-B
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