MIC45205 Datasheet, PDF (5/31 Pages) Micrel Semiconductor – 26V/6A DC-to-DC Power Module

Micrel, Inc.
MIC45205
Electrical Characteristics⁽⁵⁾ (Continued)
V_IN = V_EN = 12V, V_OUT = 3.3V, V_BST − V_SW = 5V, T_J = +25ºC. Bold values indicate −40ºC < T_J < +125ºC, unless otherwise noted.
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
Oscillator
V_EN = 12V
5
10
µA
Switching Frequency
Maximum Duty Cycle
V_FREQ = V_IN, I_OUT = 2A
V_FREQ = 50% V_IN, I_OUT = 2A
400 600
750
kHz
350
85
%
Minimum Duty Cycle
V_FB = 1V
0
%
Minimum Off-Time
140 200
260
ns
Soft-Start
Soft-Start Time
5
ms
Short-Circuit Protection
Current-Limit Threshold
V_FB = 0.79V
−30 −14
0
mV
Short-Circuit Threshold
V_FB = 0V
−23
−7
9
mV
Current-Limit Source Current
Short-Circuit Source Current
Leakage
V_FB = 0.79V
V_FB = 0V
55
70
85
µA
25
35
45
µA
SW, BST Leakage Current
10
µA
FREQ Leakage Current
10
µA
Power Good (PG)
PG Threshold Voltage
PG Hysteresis
Sweep V_FB from Low-to-High
Sweep V_FB from High-to-Low
85
90
6
95
% V_OUT
% V_OUT
PG Delay Time
PG Low Voltage
Thermal Protection
Sweep V_FB from Low-to-High
V_FB < 90% × V_NOM, I_PG = 1mA
100
µs
70
200
mV
Overtemperature Shutdown
T_J Rising
Overtemperature Shutdown Hysteresis
160
°C
15
°C
April 15, 2014
5
Revision 1.0