ZXSC100 Zetex Semiconductors plc., ZXSC100 Datasheet - Page 6

• Manufacturer Part Number: ZXSC100
• Description: Single Cell Dc-dc Converter Solution
• Manufacturer: Zetex Semiconductors plc.

PIN DESCRIPTIONS
REFERENCE DESIGNS
Three typical DC-DC step-up converter applications
for the ZXSC300 are shown. Firstly with a maximum
output power of 0.33W, secondly with a maximum
Low power solution (330mW) efficiency
ZXSC100
Pin
No.
1
2
3
4
5
6
7
BAS
RE
V CC
EM
S E M I C O N D U C T O R S
Name
EM
BAS
RE
V
I
FB
G
SENSE
CC
ND
1
2
3
4
Description
Emitter of internal drive transistor. Connect to RE in lower power applications. Must be
unconnected in higher power applications
Not connected in lower power applications. Connect to base of external drive transistor
in higher power applications
Drive current sense input. Internal threshold voltage set 25mV below V
external sense resistor. Connect emitter of external drive transistor in higher power
applications
Supply voltage, generally NiMH, NiCd single cell
Inductor current sense input. Internal threshold voltage set to 25mV. Connect external
sense resistor
Feedback sense. Internal threshold set to 730mV. Connect external resistive divider to
output voltage
Ground
8
7
6
5
V DRIVE
G ND
FB
I SENSE
6
output power of 1.0W and finally driving white LED’s in
a flashlight application.
ISSUE 3 - JANUARY 2004
CC
. Connected