MIC2103_13 Datasheet, PDF (5/38 Pages) Micrel Semiconductor – 75V, Synchronous Buck Controllers featuring Adaptive On-Time Control

Micrel, Inc.
Electrical Characteristics⁽⁴⁾ (Continued)
VIN = 48V, VOUT = 5V, 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 Hysteresis
200
EN Bias Current
Oscillator
Switching Frequency
Maximum Duty Cycle
VEN = 48V
VFREQ = VIN
VFREQ = 50%VIN
23
400
600
300
85
Minimum Duty Cycle
Minimum Off-Time
VFB > 0.8V
0
140
200
Soft Start
Soft-Start time
5
Short Circuit Protection
Current-Limit Threshold
Short-Circuit Threshold
Current-Limit Source Current
Short-Circuit Source Current
FET Drivers
VFB = 0.79V
VFB = 0V
VFB = 0.79V
VFB = 0V
-30
-14
-23
-7
60
80
27
36
DH, DL Output Low Voltage
DH, DL Output High Voltage
DH On-Resistance, High State
ISINK = 10mA
ISOURCE = 10mA
VPVDD - 0.1V
or
VBST - 0.1V
2.1
DH On-Resistance, Low State
1.8
DL On-Resistance, High State
1.8
DL On-Resistance, Low State
1.2
SW, BST Leakage Current
MIC2103/04
Max. Units
V
0.6
V
mV
40
µA
750
kHz
%
%
260
ns
ms
0
mV
9
mV
100
µA
47
µA
0.1
V
V
3.3
Ω
3.3
Ω
3.3
Ω
2.3
Ω
50
µA
November 26, 2013
5
Revision 2.0