5V/3.3V or Adjustable, Low-Dropout,
Low I
Q
, 500mA Linear Regulators
_____________________________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.)
OVERSHOOT AND TIME
EXITING SHUTDOWN MODE
MAX603/MAX604
LOAD-TRANSIENT RESPONSE
B
A
A
5V
B
MAX603
V
OUT
= 5V
2ms/div
A: OUTPUT VOLTAGE (100mV/div)
B: I
OUT
= 500mA (HIGH), I
OUT
= 5mA (LOW)
0V
500µs/div
A: OFF PIN VOLTAGE (1V/div)
RISE TIME = 13µs
B: MAX603 OUTPUT VOLTAGE (1V/div)
DELAY = 4.936ms, OVERSHOOT = 1%, RISE TIME = 55µs
______________________________________________________________Pin Description
PIN
1
2, 3, 6, 7
4
5
8
NAME
IN
GND
OFF
SET
OUT
DESCRIPTION
Regulator Input. Supply voltage can range from 2.7V to 11.5V.
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.
Shutdown, active low. Switch logic levels in less than 1µs with the high level above the OFF threshold.
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.
Regulator Output. Fixed or adjustable from 1.25V to 11.0V. Sources up to 500mA for input voltages above 4V.
1
MAX603
OUT
MAX604
2
7
GND
GND
IN
V
IN
C
IN
10µF
3
4
GND
OFF
GND
SET
6
5
R2
R1
C
OUT
10µF
R
L
8
V
OUT
Figure 1. Test Circuit
_______________________________________________________________________________________
5
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
