MIC24056 Datasheet, PDF (5/30 Pages) Micrel Semiconductor – 12V, 12A High-Efficiency Buck Regulator

Micrel, Inc.
MIC24056
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
VFB = 0V
VFB = 1.0V
6
450 600
82
0
300
Soft-Start
Soft-Start time
3
Short-Circuit Protection
Current-Limit Threshold
Short-Circuit Current
Internal FETs
VFB = 0.8V, TJ = 25°C
VFB = 0.8V, TJ = 125°C
VFB = 0V
18.75
21
17.36
12
Top-MOSFET RDS (ON)
ISW = 3A
13
Bottom-MOSFET RDS (ON)
ISW = 3A
5.3
SW Leakage Current
VEN = 0V
VIN Leakage Current
Power Good
VEN = 0V
PG Threshold Voltage
PG Hysteresis
PG Delay Time
PG Low Voltage
Thermal Protection
Sweep VFB from Low to High
Sweep VFB from High to Low
Sweep VFB from Low to High
Sweep VFB < 0.9 × VNOM, IPG = 1mA
85
92
5.5
100
70
Over-Temperature Shutdown
TJ Rising
160
Over-Temperature Shutdown Hysteresis
15
Max.
0.6
30
750
38.5
38.5
60
25
95
200
Units
V
V
µA
kHz
%
%
ns
ms
A
A
mΩ
mΩ
µA
µA
%VOUT
%VOUT
µs
mV
°C
°C
December 2012
5
M9999-121012-A