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MAX604

5V/3.3V or Adjustable, Low-Dropout, Low IQ, 500mA Linear Regulators

Maxim Integrated 

5V/3.3V or Adjustable, Low-Dropout,

Low IQ, 500mA Linear Regulators

_____________________________Typical Operating Characteristics (continued)

(VIN = 7V for MAX603, VIN = 5.3V for MAX604, OFF = VIN, SET = GND, CIN = COUT = 10µF, RL = 1kΩ, TJ = +25°C, unless otherwise noted.)

LOAD-TRANSIENT RESPONSE

OVERSHOOT AND TIME

EXITING SHUTDOWN MODE

B

5V

A

A

B

MAX603

VOUT = 5V

2ms/div

A: OUTPUT VOLTAGE (100mV/div)

B: IOUT = 500mA (HIGH), IOUT = 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

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.

1

IN

8

MAX603 OUT

2

MAX604

GND

GND

7

VIN

3 GND

GND 6

CIN

10µF

4

OFF

SET 5

VOUT

R1

COUT

RL

10µF

R2

Figure 1. Test Circuit

_______________________________________________________________________________________ 5

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