MIC2174 Micrel Semiconductor, MIC2174 Datasheet - Page 4

• Manufacturer Part Number: MIC2174
• Description: Synchronous Buck Controller
• Manufacturer: Micrel Semiconductor

Micrel, Inc.
Note:
8. The maximum duty cycle is limited by the fixed mandatory off time T
Parameter
Oscillator
Switching Frequency
Maximum Duty Cycle
Minimum Duty Cycle
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
Thermal Protection
Over-temperature Shutdown
Over-temperature Shutdown
Hysteresis
Shutdown Control
En Logic Level Low
En Logic Level High
En Pull-up Current
September 2009
Measured in Test Mode
Measured at DH
Measured at DH
I
I
V
V
3V < V
3V < V
Condition
SINK
SOURCE
LX
LX
= 40V, V
= 40V, V
= 10mA
IN
IN
= 10mA
<5.5V
<5.5V
IN
IN
= 5.5V,V
= 5.5V,V
(8)
BST
BST
OFF
= 45.5V
of typical 363ns.
= 45.5V
4
V
V
BST
0.225
IN
Min
0.4
-0.1V
or
-0.1V
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Typ
155
0.3
2.1
1.8
1.8
1.2
0.8
0.9
87
10
50
0
M9999-090409-B
0.375
Max
0.1
3.3
3.3
3.3
2.3
1.2
55
21
MIC2174
Units
MHz
µA
µA
µA
°C
°C
%
%
Ω
Ω
Ω
Ω
V
V
V
V