IN_ drops 10mV below OUT_, shutting off the regulator and opening the PMOS body diode connection, preventing any

reverse current.

RESET Outputs

The MAX25307/MAX25308 include an open-drain output, RESET for each output that goes low to indicate the output

voltage is out of regulation. Connect a pullup resistor from this pin to an external supply. When the associated EN_ is low

the RESET_ is asserted. The hold time of all reset outputs is factory selectable between 0.5ms and 14.9ms.

Input Capacitor

A 4.7μF ceramic capacitor for channel 1 and 1μF ceramic capacitor for channels 2 and 3 are recommended for the

input. Select a capacitor that maintains its capacitance over temperature and DC bias. Capacitors with X7R temperature

characteristics generally perform well.

Output Capacitor

The minimum output capacitance for stability depends on the current configuration of the channel. See the following table

for the capacitance requirements based on the output current capability.

(μF)

(μF)

600mA

2.35

4.7

300mA

1.1

2.2

The typical output capacitance assumes an X7R capacitor with a working voltage high enough such that the fully derated

Thermal Considerations

The MAX25307/MAX25308 are packaged in an 16-pin 3mm x 3mm TQFN package with an exposed pad. The exposed

pad is the main path for heat to leave the IC, and therefore must be connected to a ground plane with thermal vias

to allow heat to dissipate from the device. Thermal properties of the IC package are given in the Package Information

section.

MAX25307/MAX25308

Two/Three Output Low-Noise LDO Linear

Regulators

www.maximintegrated.com

Maxim Integrated | 13