MIC28304 Datasheet, PDF (5/39 Pages) Micrel Semiconductor – 70V 3A Power Module

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.
Enable Control
EN Logic Level High
EN Logic Level Low
EN Hysteresis
EN Bias Current
Oscillator
VEN = 12V
1.8
0.6
200
5
20
Switching Frequency
Maximum Duty Cycle
Minimum Duty Cycle
Minimum Off-Time
Soft-Start⁽⁵⁾
FREQ pin = open
RFREQ = 100kΩ (FREQ pin-to-GND)
VFB > 0.8V
400 600 750
300
85
0
140 200 260
Soft-Start Time
5
Short-Circuit Protection⁽⁵⁾
Current-Limit Threshold (VCL)
Short-Circuit Threshold
Current-Limit Source Current
Short-Circuit Source Current
Leakage
VFB = 0.79V
VFB = 0V
VFB = 0.79V
VFB = 0V
−30 −14
0
−23 −7
9
60
80 100
27
36
47
SW, BSTR Leakage Current
Power Good⁽⁵⁾
Power Good Threshold Voltage
Power Good Hysteresis
Power Good Delay Time
Power Good Low Voltage
Thermal Protection
Sweep VFB from low-to-high
Sweep VFB from high-to-low
Sweep VFB from low-to-high
VFB < 90% x VNOM, IPG = 1mA
50
85
90
95
6
100
70 200
Overtemperature Shutdown
TJ Rising
160
Overtemperature Shutdown Hysteresis
4
Units
V
V
mV
µA
kHz
%
%
ns
ms
mV
mV
µA
µA
µA
%VOUT
%VOUT
µs
mV
°C
°C
March 25, 2014
5
Revision 1.1