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MIC28304 Datasheet(PDF) 5 Page - Micrel Semiconductor

Part # MIC28304
Description  70V 3A Power Module
PDF  39 Pages
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Manufacturer  MICREL [Micrel Semiconductor]
Direct Link  http://www.micrel.com
Logo MICREL - Micrel Semiconductor

MIC28304 Datasheet(HTML) 5 Page - Micrel Semiconductor

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Micrel, Inc.
MIC28304
Electrical Characteristics
(4) (Continued)
PVIN = VIN = 12V, VOUT = 5V, VBST – VSW = 5V; TA = 25°C, unless noted. Bold values indicate −
40°C ≤ TJ ≤ +125°C.
Parameter
Condition
Min.
Typ.
Max.
Units
Enable Control
EN Logic Level High
1.8
V
EN Logic Level Low
0.6
V
EN Hysteresis
200
mV
EN Bias Current
VEN = 12V
5
20
µA
Oscillator
Switching Frequency
FREQ pin = open
400
600
750
kHz
RFREQ = 100k
Ω (FREQ pin-to-GND)
300
Maximum Duty Cycle
85
%
Minimum Duty Cycle
VFB > 0.8V
0
%
Minimum Off-Time
140
200
260
ns
Soft-Start
(5)
Soft-Start Time
5
ms
Short-Circuit Protection
(5)
Current-Limit Threshold (VCL)
VFB = 0.79V
−30
−14
0
mV
Short-Circuit Threshold
VFB = 0V
−23
−7
9
mV
Current-Limit Source Current
VFB = 0.79V
60
80
100
µA
Short-Circuit Source Current
VFB = 0V
27
36
47
µA
Leakage
SW, BSTR Leakage Current
50
µA
Power Good
(5)
Power Good Threshold Voltage
Sweep VFB from low-to-high
85
90
95
%VOUT
Power Good Hysteresis
Sweep VFB from high-to-low
6
%VOUT
Power Good Delay Time
Sweep VFB from low-to-high
100
µs
Power Good Low Voltage
VFB < 90% x VNOM, IPG = 1mA
70
200
mV
Thermal Protection
Overtemperature Shutdown
TJ Rising
160
°C
Overtemperature Shutdown Hysteresis
4
°C
March 25, 2014
5
Revision 1.1



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