MIC2185_05 Datasheet, PDF (4/15 Pages) Micrel Semiconductor – Low Voltage Synchronous Boost PWM Control IC

MIC2185
Micrel, Inc.
Parameter
Condition
Min Typ Max Unit
Soft Start
Soft Start Current
5
µA
Current Limit
Current Limit Threshold Voltage Voltage on CSH to trip current limit
100
mV
Error Amplifier
Error Amplifier Gain
20
V/V
Current Amplifier
Current Amplifier Gain
3.7
V/V
SKIP Input
SKIP Threshold
0.6
1.4
2.2
V
SKIP Input Current
Oscillator Section
V_SKIP = 3V
0.1
5
µA
Oscillator Frequency (f_S)
Maximum Duty Cycle
Minimum On Time
FREQ/2 frequency (f_S)
Frequency Foldback Threshold
V_FB = 1.0V
V_FB = 1.5V
V_FREQ/2=3V
Measured at FB pin
360 400 440 kHz
85
%
180
ns
170 200 230
0.3
V
Frequency Foldback Frequency
SYNC Threshold Level
V_FREQ/2=0V
90
kHz
0.6
1.4
2.2
V
SYNC Input Current
0.1
5
µA
SYNC Minimum Pulse Width
200
ns
SYNC Capture Range
Note 4
Gate Drivers (OUTN and OUTP)
f_O+15 %
600 kHz
Rise/Fall Time
Driver Non-overlap Time
Output Driver Impedance
C_L = 3300pF
V_INP = 12V
V_INP = 5V
Source; V_INP = 12V
Sink; V_INP = 12V
Source; V_INP = 5V
Sink; V_INP = 5V
50
ns
70
ns
90
ns
4
8
Ω
3
7
Ω
5
11
Ω
5
11
Ω
Note 1.
Note 2.
Absolute maximum ratings indicate limits beyond which damage to the component may occur. Electrical specifications do not apply when
operating the device outside of its operating ratings. The maximum allowable power dissipation is a function of the maximum junction tempera-
ture, T_J(max), the junction-to-ambient thermal resistance, θ_JA, and the ambient temperature, T_A.
The device is not guaranteed to function outside its operating rating.
Note 3. Devices are ESD sensitive. Handling precautions recommended.
Note 4. See application information for limitations on maximum operating frequency.
MIC2185
4
October 2005