MAX5084 查看數據表（PDF） - Maxim Integrated

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MAX5084

65V, 200mA, Low-Quiescent-Current Linear Regulators in TDFN

Maxim Integrated 

65V, 200mA, Low-Quiescent-Current

Linear Regulators in TDFN

Calculate package dissipation at the given temperature

as follows:

PD = 1.905W

Find the maximum output current:

IOUT(MAX)

=

1.905W

9V −5V

=

476mA (IOUTMAX = 200mA)

In example 3, the maximum output current is calculated

as 476mA, however, the maximum output current can-

not exceed 200mA.

Alternately, use Figure 4 to quickly determine allow-

able maximum output current for selected ambient

temperatures.

Output Capacitor Selection and

Regulator Stability

For stable operation over the full temperature range

and with load currents up to 200mA, use a 10µF (min)

output capacitor with an ESR < 0.5Ω. To reduce noise

and improve load-transient response, stability, and

power-supply rejection, use larger output capacitor val-

ues such as 22µF.

Some ceramic dielectrics exhibit large capacitance

and ESR variations with temperature. For dielectric

capacitors such as Z5U and Y5V, use 22µF or more to

ensure stability at temperatures below -10°C. With X7R

or X5R dielectrics, 10µF should be sufficient at all oper-

ating temperatures. For high-ESR tantalum capacitors

use 22µF or more to maintain stability. To improve

power-supply rejection and transient response, use a

minimum 10µF capacitor between IN and GND.

300

VOUT = 5V

250

200

TA ≤ +70°C

150

TA = +85°C

100

TA = +125°C

50

0

5 15 25 35 45 55 65

VIN (V)

Figure 4. Calculated Maximum Output Current vs. Input Voltage

PART

MAX5084ATT+T

MAX5085ATT+T

Selector Guide

TEMP RANGE

-40°C to +125°C

-40°C to +125°C

OUTPUT

VOLTAGE (V)

5 or adjustable

3.3 or adjustable

PROCESS: BiCMOS

Chip Information

_______________________________________________________________________________________ 9

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