Datasheet

MAX6469–MAX6484
300mA LDO Linear Regulators with Internal
Microprocessor Reset Circuit
4 _______________________________________________________________________________________
Note 2: All devices are 100% production tested at +25°C and are guaranteed by correlation for T
A
= T
MIN
to T
MAX
.
Note 3: Guaranteed by design.
Note 4: Dropout voltage is defined as (V
IN
- V
OUT
) when V
OUT
is 2% below the value of V
OUT
for V
IN
= V
OUT(NOM)
+ 1V.
Note 5: MAX6473/MAX6474/MAX6481/MAX6482 are guaranteed by design for V
OUT
< 2.5V.
Note 6: Select the reset timeout period using the
Reset Timeout Delay Guide (Table 3). Insert the appropriate suffix in the part number
when ordering.
ELECTRICAL CHARACTERISTICS (continued)
(V
IN
= (V
OUT
+ 0.5V) or +2.5V, whichever is greater, C
OUT
= 3.3µF, T
A
= -40°C to +85°C. Typical specifications are at T
A
= +25°C,
unless otherwise noted.) (Note 2)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
MR Input Low Voltage V
IL
0.3 ×
V
OUT
V
MR Input High Voltage V
IH
(Note 3)
0.7 ×
V
OUT
V
MR Minimum Input Pulse 1µs
MR Glitch Rejection 120 ns
MR to Reset Delay 200 ns
MR Pullup Resistance MR to OUT 25 40 70 kΩ
V
OUT
≥ 1.0V, I
SINK
= 50µA, RESET asserted 0.3
RESET Output Voltage
(Open Drain)
V
OL
V
OU T
≥ 1.5V , I
S IN K
= 3.2m A, RES ET asser ted 0.4
V
Open-Drain Reset Output
Leakage Current
I
LKG
(Note 3)
1µA
V
OUT
≥ 1.0V, I
SINK
= 50µA, RESET asserted 0.3
V
OL
V
OU T
≥ 1.5V , I
S IN K
= 3.2m A, RES ET asser ted 0.4
RESET Output Voltage Push-Pull
V
OH
V
OUT
≥ 2.0V, I
SOURCE
= 500µA, RESET
deasserted
0.8 ×
V
OUT
V
GROUND CURRENT vs. INPUT VOLTAGE
(NO LOAD)
MAX6469 toc01
INPUT VOLTAGE (V)
GROUND CURRENT (µA)
54321
20
40
60
80
100
120
0
06
+85
°
C
+25
°
C
-40
°
C
GROUND CURRENT vs. INPUT VOLTAGE
(300mA LOAD)
MAX6469 toc02
INPUT VOLTAGE (V)
GROUND CURRENT (µA)
20
40
60
80
100
120
0
5432106
+85
°
C
+25
°
C
-40
°
C
MAXIMUM TRANSIENT DURATION
vs. RESET THRESHOLD OVERDRIVE
MAX6469 toc03
RESET THRESHOLD OVERDRIVE (mV)
PULSE DURATION (µs)
10
25
50
75
100
125
150
0
1 100
RESET ASSERTS ABOVE
THIS LINE
Typical Operating Characteristics
(V
IN
= 5V, V
OUT
= 3.3V, C
OUT
= 3.3µF, T
A
= +25°C, unless otherwise noted.)