6

_______________________________________________________________________________________

SHUTDOWN RESPONSE

MAX1793 toc14

40

µs/div

2V/div

5V/div

RESET OUTPUT RESPONSE

MAX1793 toc15

1ms/div

5V/div

2V/div

2V/div

RST

Typical Operating Characteristics (continued)

Pin Description

PIN

NAME

FUNCTION

1, 8. 9, 16

N.C.

No Connection. Not internally connected.

2–5

IN

Regulator Input. Supply voltage ranges from +2.5V to +5.5V. Bypass with a 4.7µF capacitor to GND

(see the Capacitor Selection and Regulator Stability). These inputs are internally connected, but they

also must be externally connected for proper operation.

6

RST

the reset threshold. Connect a 100k

Ω pullup resister to OUT to obtain an output voltage.

7

SHDN

Active-Low Shutdown Input. A logic-low disables the output and reduces the supply current to 0.1µA.

In shutdown, the

RST output is low and OUT is pulled low through an internal 5k

Ω resistance. Connect

SHDN to IN for normal operation.

10

GND

Ground. This pin and the exposed pad also function as a heatsink. Solder both to a large pad or to the

circuit-board ground plane to maximize power dissipation.

11

SET

Voltage-Setting Input. Connect to GND to select the factory-present output voltage. Connect SET to an

external resistor-divider for adjustable-output operation.

12–15

OUT

Regulator Output. Bypass with a 6.8µF, low-ESR capacitor to GND. Connect all OUT pins together at

the IC.