MAX14523A_11 Datasheet, PDF (3/11 Pages) Maxim Integrated Products – 250mA to 1.5A, Adjustable Current-Limit Switches

250mA to 1.5A, Adjustable
Current-Limit Switches
ELECTRICAL CHARACTERISTICS (continued)
(V_IN = +1.7V to +5.5V, R_SETI = 94.2kΩ, C_IN = C_OUT = 1µF, and T_A = T_J = -40°C to +125°C, unless otherwise noted. Typical values
are at V_IN = +3.3V, T_A = +25°C.) (Note 2)
PARAMETER
FLAG OUTPUT
FLAG Output Logic-Low Voltage
FLAG Output Leakage Current
DYNAMIC
SYMBOL
CONDITIONS
I_SINK = 1mA
V_IN = V_FLAG = 5.5V, FLAG deasserted
MIN TYP MAX UNITS
0.4
V
1
μA
Turn-On Time
t_SS
Time from ENABLE signal to V_OUT = 90%
of V_IN = 3.3V, Figure 1
1
ms
Turn-Off Time
t_OFF
Time from DISABLE signal to V_OUT = 10%
of V_IN = 3.3V, R_L = 20
, Figure 1
250
μs
Current-Limit Reaction Time
t_LIM
V_IN = 3.3V, R_SETI = 91.78k
to 563.12k
,
output high and then short-circuit applied
3
μs
Blanking Time
Retry Time
THERMAL PROTECTION
Thermal Shutdown
Thermal Shutdown Hysteresis
t_BLANK
t_RETRY
(Note 3)
MAX14523A/MAX14523AL (Note 3)
Low-to-high
10
14.5
25
ms
320
875
ms
+170
°C
15
°C
Note 2: All devices are 100% tested at 125°C. Electrical limits across the full temperature range are guaranteed by design and correlation.
Note 3: Blanking time and retry time are generated by the same oscillator. Therefore, the ratio of ^tRETRY is a constant value of 32.
See Figures 2 and 3.
t_BLANK
ON(ON)*
t_SS
90% V_IN
V_OUT
*( ) THE POLARITY OF THE SIGNAL IS REVERSED FOR THE MAX14523AL ONLY.
Figure 1. Timing Diagram for Measuring Turn-On Time (t_SS) and Turn-Off Time (t_OFF)
t_OFF
10% V_IN
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