AP2203K-3.0TR 查看數據表（PDF） - BCD Semiconductor

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AP2203K-3.0TR

150mA RF ULDO REGULATOR WITH ERROR FLAG

BCD Semiconductor 

Preliminary Datasheet

150mA RF ULDO REGULATOR WITH ERROR FLAG

AP2203

Application Information

Input Capacitor

A 1µF minimum capacitor is recommended to be

placed between VIN and GND.

Where: TJ≤TJ(max), TJ(max) is absolute maximum rat-

ings for the junction temperature; VIN*IGND can be

ignored due to its small value.

Output Capacitor

It is required to prevent oscillation. 1.0µF minimum

is recommended The output capacitor may be

increased to improve transient response.

Power Dissipation

Thermal shutdown may take place if exceeding the

maximum power dissipation in application. Under all

possible operating conditions, the junction tempera-

ture must be within the range specified under abso-

lute maximum ratings to avoid thermal shutdown.

To determine if the power dissipated in the regulator

reaches the maximum power dissipation (see figure

15), using:

TJ = PD*θJA + TA

PD=(VIN-VOUT)*IOUT+VIN*IGND

TJ(max) is 150oC while θJA is 200oC/W, no heatsink is

required since the package alone will dissipate

enough heat to satisfy these requirements unless the

calculated value for power dissipation exceeds the

limit.

Take 3.0V version as an example:

IOUT=150mA, TA=50oC, VIN(Max) is:

(150oC-50oC)/(0.15A*200oC/W)+3.0V=6.333V

Therefore, for good performance, please make sure

that input voltage is less than 6.333V without heat-

sink when TA=50oC.

Mar. 2006 Rev. 1. 0

BCD Semiconductor Manufacturing Limited

17

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