MIC24052 Datasheet, PDF (5/30 Pages) Micrel Semiconductor – 12V, 6A High-Efficiency Buck Regulator

Micrel, Inc.
MIC24052
Electrical Characteristics⁽⁵⁾ (Continued)
PVIN = VIN = VEN = 12V, VBST – VSW = 5V; TA = 25°C, unless noted. Bold values indicate −40°C ≤ TJ ≤ +125°C.
Parameter
Condition
Min.
Typ.
Enable Control
EN Logic Level High
1.8
EN Logic Level Low
EN Bias Current
Oscillator
Switching Frequency ⁽⁶⁾
Maximum Duty Cycle ⁽⁷⁾
Minimum Duty Cycle
Minimum Off-Time
VEN = 12V
VOUT = 2.5V
VFB = 0V
VFB = 1.0V
6
450
600
82
0
300
Soft-Start
Soft-Start time
3
Short-Circuit Protection
Peak Inductor Current-Limit
Threshold
VFB = 0.8V, TJ = 25°C
7.5
11
Peak Inductor Current-Limit
Threshold
VFB = 0.8V, TJ = 125°C
6.6
11
Short-Circuit Current
VFB = 0V
8
Internal FETs
Top-MOSFET RDS (ON)
Bottom-MOSFET RDS (ON)
ISW = 3A
ISW = 3A
42
12.5
SW Leakage Current
VEN = 0V
VIN Leakage Current
Power Good (PG)
VEN = 0V
Power Good Threshold Voltage
Sweep VFB from Low to High
85
92
Power Good Hysteresis
Sweep VFB from High to Low
5.5
Power Good Delay Time
Sweep VFB from Low to High
100
Power Good Low Voltage
Sweep VFB < 0.9 × VNOM, IPG = 1mA
70
Thermal Protection
Over-Temperature Shutdown
TJ Rising
160
Over-Temperature Shutdown
Hysteresis
15
Max. Units
V
0.6
V
30
µA
750
kHz
%
%
ns
ms
17
A
17
A
A
mΩ
mΩ
60
µA
25
µA
95
%VOUT
%VOUT
µs
200
mV
°C
°C
December 2012
5
M9999-120312-A