Datasheet

(V
IN
= 14V, I
OUT
= 1mA, C
IN
= 47μF (low ESR), C
OUT
= 15μF, V
EN
= 2.4V, 10kΩ from RESET to OUT, T
A
= T
J
= -40°C to +125°C,
unless otherwise noted. Typical specifications are at T
A
= +25°C.) (Note 2)
Note 2: Limits at T
A
= -40°C are guaranteed by design.
Note 3: Output voltage is tested using a pulsed load current of less than 50ms duration.
Note 4: Dropout voltage is defined as (V
IN
- V
OUT
) when V
OUT
is 100mV below the value of V
OUT
for V
IN
= V
OUT
+ 3V.
Note 5: Startup time measured from 50% of V
IN
to 90% of V
OUT
.
Note 6: Continuous short-circuit protection for V
IN
> 14V not guaranteed.
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Enable Input Current I
EN
V
EN
= 2.4V 0.35
µA
V
EN
= 14V 3.4
SET Reference Voltage V
SET
1.200 1.235 1.260 V
SET Input Leakage Current I
SET
-100 +0.5 +100 nA
Load Regulation
ΔV
OUT
/
ΔI
OUT
I
OUT
= 1mA to 400mA (Note 3) 0.1 0.35 Ω
Power-Supply Rejection Ratio PSRR
I
OUT
= 10mA, f = 100Hz, 500mV
P-P
,
V
OUT
= 5V
70 dB
Short-Circuit Current I
SC
V
IN
< 14V (Note 6) 640 mA
Thermal Shutdown Temperature T
J(SHDN)
175 °C
Thermal Shutdown Hysteresis ΔT
J(SHDN)
25 °C
RESET Voltage Threshold
V
RESET
89 92 94 % V
OUT
RESET Threshold Hysteresis
V
RHYST
2 % V
OUT
RESET Output Low Voltage
V
RL
I
SINK
= 1mA 0.4 V
RESET Output Leakage Current
I
RH
V
RESET
= 5V 1 µA
RESET Output Minimum Timeout
Period
When V
OUT
reaches RESET threshold,
C
CT
= Open
15 µs
ENABLE to RESET Minimum
Timeout Period
When EN goes high, C
CT
= open 170 µs
Delay Comparator Threshold
(Rising)
1.196 1.230 1.264 V
Delay Comparator Threshold
Hysteresis
100 mV
CT Charge Current 1 2 4 µA
CT Discharge Current 5 mA
MAX5087 45V, 400mA, Low-Quiescent-Current
Linear Regulator with Adjustable Reset Delay
www.maximintegrated.com
Maxim Integrated │ 3
Electrical Characteristics (continued)