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APW34063K

1.5A, DC/DC Switching Regulators

Anpec Electronics 

APW34063

Typical Application Circuits (Cont.)

External Current Boost Connections for IC Peak Greater than 1.5A

8

7

RSC

VIN

6

1

VOUT

8

7

2

RSC

VIN

6

R

1

VOUT

2

R 0 for

constant VIN

External NPN Switch

External NPN Saturated Switch (see Note5)

Note :

5.If the output switch is driven into hard saturation (non-Darlington configuration) at low switch currents (≤300mA) and high driver

currents (≥30mA), it may take up to 2.0µs to come out of saturation. This condition will shorten the off time at frequencies≥30kHz, and

is magnified at high temperatures. This condition does not occur with a Darlington configuration, since the output switch cannot

saturate. If a non-Darlington configuration is used, the following output drive condition is recommended.

Copyright © ANPEC Electronics Corp.

5

Rev. A.3 - May., 2005

www.anpec.com.tw

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