Datasheet

(Typical Application Circuit, V
S
= +14V, C
IN
= 10μF, C
OUT
= 10μF, V
SI
= 0V, V
EN
= +2.4V, V
OUT
= +5V, T
A
= +25°C, unless
otherwise noted.)
DROPOUT VOLTAGE
vs. TEMPERATURE
MAX5091 toc13
TEMPERATURE (°C)
DROPOUT VOLTAGE (mV)
10065-5 30
50
100
150
200
250
300
350
400
0
-40 135
MAX5091A
V
S
= 4.75V
I
OUT
= 10mA
I
OUT
= 100mA
RESET THRESHOLD
vs. TEMPERATURE
MAX5091 toc14
TEMPERATURE (°C)
RESET THRESHOLD VOLTAGE (V)
1006530-5
4.42
4.44
4.46
4.48
4.50
4.52
4.54
4.56
4.58
4.60
4.40
-40 135
MAX5091A
V
OUT
FALLING
V
OUT
RISING
RESET VOLTAGE
vs. OUTPUT VOLTAGE
MAX5091 toc15
V
OUT
(V)
V
RES
(V)
4.64.54.4
1
2
3
4
5
0
4.3 4.7
MAX5091A
R
RES
= 10kΩ TO OUT
V
OUT
FALLING
V
OUT
RISING
SENSE THRESHOLD
vs. TEMPERATURE
MAX5091 toc16
TEMPERATURE (°C)
SENSE THRESHOLD (V)
1006530-5
1.05
1.10
1.15
1.20
1.25
1.30
1.35
1.40
1.45
1.50
1.00
-40 135
SI INPUT FALLING
SI INPUT RISING
SENSE OUTPUT
vs. SENSE INPUT
MAX5091 toc17
SENSE INPUT (V)
SENSE OUTPUT (V)
1.31.21.1
1
2
3
4
5
0
1.0 1.4
V
SI
FALLING
V
SI
RISING
POWER-SUPPLY REJECTION RATIO
vs. SUPPLY CURRENT
MAX5091 toc18
FREQUENCY (kHz)
PSRR (dB)
1010.1
-70
-60
-50
-40
-30
-20
-10
0
-80
0.01 100
V
IN
= 14V
I
OUT
= 10mA
500mV
P-P
LOAD-TRANSIENT RESPONSE
MAX5091 toc19
200µs/div
V
OUT
5V AC-COUPLED
100mV/div
I
OUT
20mA/div
50mA
100µA
C
IN
= 10µF
C
OUT
= 10µF/10mΩ ESR
I
STEP
= 100µA TO 50mA
LINE-TRANSIENT RESPONSE
MAX5091 toc20
200µs/div
V
OUT
5V AC-COUPLED
200mV/div
I
OUT
= 1mA
V
S
10V/div
40V
14V
MAX5091 28V, 100mA, Low-Quiescent-Current LDO
with Reset and Power-Fail Input/Output
Maxim Integrated │ 7
www.maximintegrated.com
Typical Operating Characteristics (continued)