Datasheet

MAX6469–MAX6484
300mA LDO Linear Regulators with Internal
Microprocessor Reset Circuit
_______________________________________________________________________________________ 3
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
I
OUT
= 50mA 23 32
I
OUT
= 150mA 55 90
V
OUT
= +3.3V
(fixed output operation)
I
OUT
= 300mA 114 180
I
OUT
= 50mA 25 40
I
OUT
= 150mA 61 100
V
OUT
= +3.0V
(fixed output operation)
I
OUT
= 300mA 114 190
I
OUT
= 50mA 26 50
I
OUT
= 150mA 65 110
V
OUT
= +2.8V
(fixed output operation)
I
OUT
= 300mA 137 210
I
OUT
= 50mA 30 60
I
OUT
= 150mA 75 150
Dropout Voltage
(Notes 3, 4)
∆V
DO
V
OUT
= +2.5V
(fixed output operation)
I
OUT
= 300mA 158 250
mV
Output Current Limit V
IN
≥ 2.5V (Note 3) 450 mA
Input Reverse Leakage Current
(OUT to IN Leakage Current)
V
IN
= 4V, V
OUT
= 5.5V, SHDN deasserted 0.01 1.5 µA
Startup Time Response
Rising edge of V
IN
or SHDN to V
OUT
within specification, R
L
= 68Ω, SET = GND,
I
OUT
= 10mA
20 µs
SHDN Input Low Voltage V
IL
0.3 × V
IN
V
SHDN Input High Voltage V
IH
0.7 × V
IN
V
SHDN Input Current V
SHDN
= V
IN
or V
GND
-1 0.1 +1 µA
Thermal-Shutdown Temperature T
SHDN
180 °C
Thermal-Shutdown Hysteresis ∆T
SHDN
20 °C
Line Regulation
V
OUT
= 1.5V, 2.5V ≤ V
IN
≤ 5.5V,
I
OUT
= 10mA
0.09 %/V
Load Regulation
V
OUT
= 1.5V, V
IN
= 2.5V, 1mA ≤ I
OUT
≤
150mA
0.2 %
MAX6469–MAX6476 150
Output Voltage Noise
10Hz to 100kHz,
C
IN
= 0.1µF,
I
OUT
= 100mA,
V
OUT
= 1.5V
MAX6477–MAX6484 75
µV
RMS
RESET CIRCUIT
MAX64_ _ _ _ _ _ A 90 92.5 95
V
OUT
Reset Threshold
(V
FB
for MAX6475/MAX6476/
MAX6483/MAX6484) (Note 5)
V
THOUT
MAX64_ _ _ _ _ _ B 85 87.5 90
%V
OUT
V
OUT
to Reset Delay
(V
FB
for MAX6475/MAX6476/
MAX6483/MAX6484)
35 µs
D1 2.5 3.75 5.0
D2 20 30 40
D3 150 225 300
Reset Timeout Period
(Note 6)
t
RP
D4 1200 1800 2400
ms