MAX8875 데이터 시트보기 (PDF) - Maxim Integrated

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MAX8875

150mA, Low-Dropout Linear Regulator with Power-OK Output

Maxim Integrated 

150mA, Low-Dropout Linear Regulator

with Power-OK Output

PSRR and Operation from

Sources Other than Batteries

The MAX8875 is designed to deliver low dropout voltages

and low quiescent currents in battery-powered systems.

Power-supply rejection is 60dB at low frequencies. See

the Power-Supply Rejection Ratio vs. Frequency graph in

the Typical Operating Characteristics.

Improve supply-noise rejection and transient response

by increasing the values of the input and output bypass

capacitors. The Typical Operating Characteristics show

the MAX8875’s line- and load-transient responses.

Dropout Voltage

For versions with the output voltage greater than the

minimum input voltage (2.5V), the regulator’s minimum

input-output voltage differential (or dropout voltage)

determines the lowest usable supply voltage. In battery-

powered systems, this will determine the useful end-of-

life battery voltage. Because the MAX8875 uses a

P-channel MOSFET pass transistor, its dropout voltage

is a function of drain-to-source on-resistance (RDS(ON))

multiplied by the load current (see Typical Operating

Characteristics):

VDROPOUT = VIN - VOUT = RDS(ON) ✕ IOUT

Chip Information

TRANSISTOR COUNT: 266

8 _______________________________________________________________________________________

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