TK73211M Просмотр технического описания (PDF) - Toko America Inc

Номер в каталоге

Компоненты Описание

производитель

TK73211M

LOW DROPOUT REGULATOR

Toko America Inc  

TK732xx

APPLICATION INFORMATION (CONT.)

EXTERNAL PNP POWER TRANSISTOR

This IC can use any kind of external transistor. The external transistor selection is a function of the load current, Hfe and

power dissipation. See following chart:

LOAD CURRENT

RECOMMENDED EXTERNAL TRANSISTOR

0 ~ 180 mA

2SB624, 2SB1115, 2SB799 (NEC), 2SB970 (Matushita)

0 ~ 300 mA

2SB1115, 2SB799 (NEC)

0 ~ 500 mA

2SB1114, 2SB1115 (NEC), 2SB1302 (Sanyo), 2SA1203,

2SA1213, 2SA1734 (Toshiba)

0~1A

2SA1242, 2SA1736 (Toshiba), 2SB1302, 2SA1896 (Sanyo)

0~2A

2SA1451, 2SA1242 (Toshiba)

0~3A

2SA1451 (Toshiba), 2SA1645 (NEC)

0~4A

2SA1451 (Toshiba), 2SB904 (Sanyo), 2SA1645 (NEC)

RECOMMENDED RIPK (Ω)

0.33 ~ 0.39

0.22 ~ 0.27

0.12 ~ 0.15

0.056 ~ 0.068

0.033 ~ 0.039

0.022 ~ 0.027

0.012 ~ 0.015

HIGH-SIDE SWITCHING

VOLTAGE

REGULATOR

VDROP

ON/OFF

CONTROL

VOUT

High-side switching should not be implemented by an external transistor as shown above. This results in additional

voltage drop and loss of accuracy.

µ PRO

VIN

TK732xx

VCONT

VOUT

The high output voltage accuracy and low dropout voltage are maintained when the IC is turned ON/OFF by using the

control pin as illustrated above.

January 1999 TOKO, Inc.

Page 13

Share Link: