MIC2186_05 Datasheet, PDF (4/15 Pages) Micrel Semiconductor – Low Voltage PWM Control IC

MIC2186
Micrel, Inc.
Parameter
Condition
Min Typ Max Units
Enable/UVLO
Enable Input Threshold
0.6
0.9
1.2
V
UVLO Threshold
1.4
1.5
1.6
V
UVLO Hysteresis
140
mV
Enable Input Current
Soft Start
V_EN/UVLO = 5V
0.2
5
µA
Soft Start Current
5
µA
Current Limit
Current Limit Threshold Voltage (Voltage on CSH to trip current limit)
80
100 120 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
HIDC Input
V_SKIP = 3V
0.1
5
µA
HIDC Threshold
0.6
1.4
2.2
V
Oscillator Section
Oscillator Frequency (f_O)
Maximum Duty Cycle
Minimum On Time
FREQ/2 Frequency (f_O)
Frequency Foldback Threshold
V_FB = 1.0V, V_HIDC = 3V
V_FB = 1.0V, V_HIDC = 0V
V_FB = 1.5V, V_HiDC = 3V
V_HiDC = 3V, V_FREQ/2 = 3V
Measured on FB
360 400 440 kHz
85
%
50
180
ns
170 200 230 kHz
0.3
V
Frequency Foldback Frequency
SYNC Threshold Level
V_HiDC = 3V, 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
Gate Drivers
Note 4
f_O + 15 %
600 kHz
Rise/Fall Time
Output Driver Impedance
C_L = 3300pF
source; V_INP = 12V
sink; V_INP = 12V
source; V_INP =5V
sink; V_INP = 5V
50
ns
1.8
4
Ω
1.6
3.5
Ω
2.6
Ω
2.4
Ω
Note 1.
Note 2.
Note 3.
Note 4.
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
temperature, 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.
Devices are ESD sensitive. Handling precautions recommended.
See application information for limitations on maximum operating frequency.
M9999-042205
4
April 2005