MAX8532(2003) Ver la hoja de datos (PDF) - Maxim Integrated

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MAX8532
(Rev.:2003)

Low-Noise, Low-Dropout, 200mA Linear Regulator in UCSP

Maxim Integrated 

Low-Noise, Low-Dropout,

200mA Linear Regulator in UCSP

Load-Transient Considerations

The MAX8532 load-transient response graphs (see the

Typical Operating Characteristics) show two compo-

nents of the output response: a DC shift in the output

voltage due to the different load currents, and the tran-

sient response. Increase the output capacitor’s value

and decrease its ESR to attenuate transient spikes.

Input/Output (Dropout Voltage)

A regulator’s minimum input/output voltage differential

(or dropout voltage) determines the lowest usable supply

voltage. In battery-powered systems, this determines

the useful end-of-life battery voltage. Because the

MAX8532 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

the Typical Operating Characteristics).

Calculating the Maximum

Output Power in UCSP

The maximum output power of the MAX8532 can be lim-

ited by the maximum power dissipation of the package.

Ascertain the maximum power dissipation by calculat-

ing the power dissipation of the package as a function

of the input voltage, output voltage, and output current.

The maximum power dissipation should not exceed the

package’s maximum power rating:

P = (VIN(MAX) - VOUT) x IOUT

where:

VIN(MAX) = Maximum input voltage

PMAX = Maximum power dissipation of the package

(308mW for UCSP)

VOUT = Output voltage of OUT

IOUT = Maximum output current of OUT

P should be less than PMAX.

Chip Information

TRANSISTOR COUNT: 1320

PROCESS: BiCMOS

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