TK11344BMIB Ver la hoja de datos (PDF) - Toko America Inc

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TK11344BMIB

VOLTAGE REGULATOR WITH ON/OFF SWITCH

Toko America Inc  

TK113xxBM/U

DEFINITION AND EXPLANATION OF TECHNICAL TERMS (CONT.)

Reverse Voltage Protection

Reverse voltage protection prevents damage due to the

output voltage being higher than the input voltage. This

fault condition can occur when the output capacitor remains

charged and the input is reduced to zero, or when an

external voltage higher than the input voltage is applied to

the output side.

CONTROL CURRENT

If the control function is not used, connect the control

terminal to VIN. When the control function is used, the

control current can be reduced by inserting a series

resistor (RCONT) between the control terminal and VIN. The

value of this resistor should be determined from the graph

below.

CONTROL PIN CURRENT VS.

VOLTAGE

50

40 VOUT

VIN

RCONT = 0

30

20

SW

RC

CN

10

0

RCONT =100K

0

1

2

3

45

VCONT (V)

Note: VCONT = differential voltage from VIN pin to VCONT pin.

SOT23L

VIN

The requirement for the pullup resistor (RPULLUP) is deter-

mined by the external control circuitry. For example, open

collector/open drain logic may require R

over tem-

PULLUP

perature; CMOS logic will not require RPULLUP.

CN

RC

SW

Page 10

SOT89

April 2000 TOKO, Inc.

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