7

Mar2-07 Rev O

SP6265 Dual Low-Dropout CMOS Voltage Regulator

© 2007 Sipex Corporation

Detailed Description

The S

linear regulator designed primarily for battery-powered

applications. These parts are available with preset output

voltage ranging from .8V to .V, and the parts can

supply loads up to 50mA.

The S

pass transistors. A P-Channel MOSEFT provides

several advantages over similar designs using PNP

pass transistors, including longer battery life. It requires

no base drive, which reduces quiescent current sig-

nificantly. The S

escent current whether in dropout, light-load, or heavy-

load applications.

The S

limiters, one for each regulator, which monitor and con-

trol the pass transistor’ s gate voltage, limiting the

guaranteed maximum output current to 80mA minimum.

The output can be shorted to ground for an indefinite time

without damaging the part.

Use a µF capacitor on the S

capacitor on the outputs. Larger input capacitor values

and lower ESRs provide better supply noise rejection

and line transient response.

Thermal -overload protection limits total power dis-

sipation in the S

ure exceeds T

o

C, the thermal sensor signals the

shut

lowing the IC to cool.

S

P6265A & SP6265B

The S

control input(EN). Drive EN low to shut down both outputs,

reducing supply current to 0.µA. Connect EN to a logic-

high, or IN, for normal operation.

S

The S

control inputs (EN and EN2). Drive EN low to shutdown

V

and EN2 low to shut down the entire chip, reducing supply

current to 0.µA. Connect both EN and EN2 to a logic-

high, or IN, for normal operation.

Shutdown

Application information

Capacitor Selection and Regulator Stability

PSRR and Operation from Sources Other

than Batteries

The S

voltages and low quiescent current in battery powered

systems. Power-supply rejection is 5dB at low

frequencies. (See the PSRR vs. Frequency graph)

internal P-Channel Pass Transistor

Thermal-Overload Protection

Current Limit