Datasheet

5V/3.3V or Adjustable, Low-Dropout,
Low I
Q
, 500mA Linear Regulators
2ms/div
LOAD-TRANSIENT RESPONSE
A: OUTPUT VOLTAGE (100mV/div)
B: I
OUT
= 500mA (HIGH), I
OUT
= 5mA (LOW)
A
B
MAX603
V
OUT
= 5V
_____________________________Typical Operating Characteristics (continued)
(V
IN
= 7V for MAX603, V
IN
= 5.3V for MAX604, OFF = V
IN
, SET = GND, C
IN
= C
OUT
= 10µF, R
L
= 1kΩ, T
J
= +25°C, unless otherwise noted.)
500µs/div
OVERSHOOT AND TIME
EXITING SHUTDOWN MODE
A: OFF PIN VOLTAGE (1V/div)
RISE TIME = 13µs
B: MAX603 OUTPUT VOLTAGE (1V/div)
DELAY = 4.936ms, OVERSHOOT = 1%, RISE TIME = 55µs
A
0V
5V
B
______________________________________________________________Pin Description
PIN NAME DESCRIPTION
1 IN Regulator Input. Supply voltage can range from 2.7V to 11.5V.
2, 3, 6, 7 GND
Ground. These pins function as heatsinks, only in the SOIC package. All GND pins must be soldered to the
circuit board for proper power dissipation. Connect to large copper pads or planes to channel heat from the IC.
4 OFF Shutdown, active low. Switch logic levels in less than 1µs with the high level above the OFF threshold.
5 SET
Feedback for Setting the Output Voltage. Connect to GND to set the output voltage to the preselected 3.3V
or 5V. Connect to an external resistor network for adjustable output operation.
8 OUT Regulator Output. Fixed or adjustable from 1.25V to 11.0V. Sources up to 500mA for input voltages above 4V.
MAX603
MAX604
OUT
GND
GND
SET
IN
OFF
C
OUT
10µF
C
IN
10µF
V
IN
V
OUT
GND
GND
R1
R2
R
L
1
2
3
4
8
7
6
5
Figure 1. Test Circuit
MAX603/MAX604
Maxim Integrated
5