MIC2182 Datasheet, PDF (5/28 Pages) Micrel Semiconductor – High-Efficiency Synchronous Buck Controller Final Information

MIC2182
Micrel
Parameter
Condition
Min Typ Max Units
Reference Output (Fixed Versions Only)
Reference Voltage
1.220 1.245 1.270 V
Reference Line Regulation
Reference Load Regulation
Enable/UVLO
6V < V_IN < 32V
0µA < I_REF < 100µA
1
mV
2
mV
Enable Input Threshold
0.6
1.1
1.6
V
UVLO Threshold
2.2
2.5
2.8
V
Enable Input Current
Soft Start
V_EN/UVLO = 5V
0.1
5
µA
Soft-Start Current
Current Limit
V_SS = 0V
–3.5 –5 –6.5 µA
Current-Limit Threshold Voltage
Error Amplifier
V_CSH = V_OUT
75
100 135
mV
Error Sense Amplifier Gain
20
Current Amp
Current Sense Amplifier Gain
2.0
Oscillator Section
Oscillator Frequency
270 300 330 kHz
Maximum Duty Cycle
86
%
Minimum On-Time
SYNC Threshold Level
V_OUT = V_OUT(nominal) + 200mV
140 250
ns
0.7
1.3
1.9
V
SYNC Input Current
SYNC Minimum Pulse Width
V_SYNC = 5V
0.1
5
µA
200
ns
SYNC Capture Range
Note 6
330
kHz
Frequency Foldback Threshold measured at VOUT pin
0.75 0.95 1.15
V
Foldback Frequency
60
kHz
Gate Drivers
Rise/Fall Time
Output Driver Impedance
C_L = 3000pF
source
sink
60
ns
5
8.5
Ω
3.5
6
Ω
Driver Nonoverlap Time
80
ns
PWM Input
PWM Input Current
V_PWM = 0V
–10
µA
Note 1.
Note 2.
Note 3.
Note 4.
Note 5.
Note 6.
Exceeding the absolute maximum rating may damage the device.
The device is not guaranteed to function outside its operating rating.
Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5k in series with 100pF.
25°C limits are 100% production tested. Limits over the operating temperature range are guaranteed by design and are not production tested.
V_IN > 1.3 × V_OUT (for the feedback voltage reference and output voltage line and total regulation).
See applications information for limitations on the maximum operating frequency.
June 2000
5
MIC2182