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MIC2164 Datasheet(PDF) 5 Page - Micrel Semiconductor

Part # MIC2164
Description  Synchronous Buck Controllers Featuring Adaptive On-Time Control 28V Input, Constant Frequency
PDF  39 Pages
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Manufacturer  MICREL [Micrel Semiconductor]
Direct Link  http://www.micrel.com
Logo MICREL - Micrel Semiconductor

MIC2164 Datasheet(HTML) 5 Page - Micrel Semiconductor

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Micrel, Inc.
MIC2164/-2/-3/C
September 2010
5
M9999-091310-D
Electrical Characteristics
(4) (Continued)
VBST − VLX = 5V; TA = +25°C, unless noted. Bold values indicate −40°C ≤ TJ ≤ +125°C.
Parameter
Condition
Min.
Typ.
Max.
Units
Maximum Duty Cycle
(9)
MIC2164/ MIC2164C
MIC2164-2
MIC2164-3
87
74
66
%
Minimum Duty Cycle
Measured at DH, VFB = 1V
0
%
FET Drives
DH, DL Output Low Voltage
ISINK = 10mA
0.1
V
DH, DL Output High Voltage
ISOURCE = 10mA
VIN − 0.1V
or
VBST − 0.1V
V
DH On-Resistance, High State
2.1
3.3
Ω
DH On-Resistance, Low State
1.8
3.3
Ω
DL On-Resistance, High State
1.8
3.3
Ω
DL On-Resistance, Low State
1.2
2.3
Ω
LX Leakage Current
VLX = 28V, VIN = 5.5V,VBST = 33.5V
50
µA
HSD Leakage Current
VLX = 28V, VIN = 5.5V,VBST = 33.5V
20
µA
Thermal Protection
Over-Temperature Shutdown
155
°C
Over-Temperature Shutdown
Hysteresis
10
°C
Shutdown Control
EN Logic Level Low
3V < VIN <5.5V
0.4
0.8
V
EN Logic Level High
3V < VIN <5.5V
0.9
1.2
V
EN Pull-Up Current
50
µA
Note:
1. Exceeding the absolute maximum rating may damage the device.
2. The device is not guaranteed to function outside its operating rating.
3. Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5k in series with 100pF.
4. Specification for packaged product only.
5. The application is fully functional at low IN (supply of the control section) if the external MOSFETs have enough low voltage VTH.
6. The current will come only from the internal 100kΩ pull-up resistor sitting on the EN Input and tied to IN.
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.



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