Diodes ZXSC410/ZXSC420/ZXSC440 - Manual (Page 2)

ZXSC410/ZXSC420/ZXSC440
Document number: DS33618 Rev. 5 - 2
2 of 17
www.diodes.com
March 2013
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ZXSC410/ZXSC420/ZXSC440
Pin Descriptions
Pin Name
Pin Number
Function
ZXSC410 ZXSC420 ZXSC440
V
CC
1 1 8 Supply Voltage
GND 2 2 7 Ground
STDN 3 — 5 Shutdown (ZXSC410 and ZXSC440)
EOR — 3 6 End of regulation (ZXSC420 and ZXSC440)
Sense 4 4 3
Inductor current sense input. Internal threshold voltage set to 28mV.
Connect external sense resistor.
V
FB
5 5 2
Reference voltage. Internal threshold set to 300mV.
Connect external resistor network to set output voltage.
Drive 6 6 1
Drive output for external switching transistor.
Connect to base or gate of external switching transistor.
NC — — 4 No connection
Functional Block Diagram