MIC2164 Datasheet, PDF (4/36 Pages) Micrel Semiconductor – Constant Frequency, Synchronous Buck Controllers Featuring Adaptive On-Time Control

Micrel, Inc.
MIC2164/-2/-3
Parameter
Oscillator
Switching Frequency ⁽⁸⁾
Maximum Duty Cycle ⁽⁹⁾
Minimum Duty Cycle
Condition
MIC2164
MIC2164-2
MIC2164-3
MIC2164
MIC2164-2
MIC2164-3
Measured at DH
Min
0.225
0.45
0.75
Typ Max Units
0.3 0.375 MHz
0.6
0.75
MHz
1
1.25 MHz
87
%
74
%
66
%
0
%
FET Drives
DH, DL Output Low Voltage
DH, DL Output High Voltage
DH On-Resistance, High State
DH On-Resistance, Low State
DL On-Resistance, High State
DL On-Resistance, Low State
LX Leakage Current
HSD Leakage Current
ISINK = 10mA
ISOURCE = 10mA
VLX = 28V, VIN = 5.5V,VBST = 33.5V
VLX = 28V, VIN = 5.5V,VBST = 33.5V
0.1
V
VIN-0.1V
V
or
VBST-0.1V
2.1
3.3
Ω
1.8
3.3
Ω
1.8
3.3
Ω
1.2
2.3
Ω
50
µA
20
µA
Thermal Protection
Over-temperature Shutdown
Over-temperature Shutdown
Hysteresis
155
°C
10
°C
Shutdown Control
En Logic Level Low
3V < VIN <5.5V
0.4
En Logic Level High
3V < VIN <5.5V
En Pull-up Current
Note:
8. Measured in test mode.
9. Measured at DH. The maximum duty cycle is limited by the fixed mandatory off time Toff of typical 363ns.
0.8
V
0.9
1.2
V
50
µA
September 2009
4
M9999-090409-B