MAX14691 Datasheet, PDF (4/19 Pages) Maxim Integrated Products – High-Accuracy, Adjustable Power Limiter

MAX14691–MAX14693
High-Accuracy, Adjustable Power Limiter
Electrical Characteristics (continued)
(V_IN = 5.5V to 58V, T_A = -40°C to +125°C, unless otherwise noted. Typical values are at V_IN = 12V, T_A = +25°C) (Note 4)
SETI
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP MAX UNITS
RSETI x ILIM
V_RI
Current Mirror Output Ratio
C_IRATIO
DYNAMIC PERFORMANCE (Note 6)
See the Setting the Current-Limit
Threshold section
1.5
V
25000
Switch Turn-On Time
V_IN = 24V, switch OFF to ON, R_LOAD
t_ON
= 240Ω, I_LIM = 1A, C_OUT = 4.7µF,
68
µs
V_OUT from 20% to 80% of V_IN
OVP Switch Response Time
t_{OVP_RES}
3
µs
Overcurrent Switch Response
Time
t_{OCP_RES} I_LIM = 4A
3
µs
Startup Timeout
t_STO
Initial start current-limit foldback
timeout (Figure 1)
1090
1200 1320
ms
Startup Initial Time
t_STI
Current is continuously limited to
1x/1.5x/2x in this interval (Figure 1)
21.8
24
26.4
ms
IN Debounce Time
Blanking Time
Autoretry Time
THERMAL PROTECTION
Thermal Foldback
Thermal Shutdown
Thermal Shutdown Hysteresis
t_DEB
t_BLANK
t_RETRY
Interval between V_IN > V_UVLO and
V_OUT = 10% of V_IN (Figure 2)
(Figures 3 and 4)
(Figure 3, Note 7)
TJ_FB
TJ_MAX
1
1.5
2.1
ms
21.8
24
26.4
ms
554
720
792
ms
150
ºC
165
ºC
10
ºC
Note 4: All devices are 100% production-tested at T_A = +25ºC. Specifications over the operating temperature range are guaranteed
by design.
Note 5: Not production-tested, user-adjustable. See the Overvoltage Lockout (OVLO) and Undervoltage Lockout (UVLO) sections.
Note 6: All timing is measured using 20% and 80% levels, unless otherwise specified.
Note 7: The autoretry time-to-blanking time ratio is fixed and is equal to 30.
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