Diodes ZXSC410/ZXSC420/ZXSC440 User Manual
Description, Features, Pin assignments
ZXSC410/ZXSC420/ZXSC440
Document number: DS33618 Rev. 5 - 2
1 of 17
March 2013
© Diodes Incorporated
ZXSC410/ZXSC420/ZXSC440
DC-DC BOOST SWITCHING CONTROLLERS
Description
The ZXSC410/420/440 are DC-DC boost controllers. Their wide input
voltage range make suitable for operation from a number of battery
configurations including single Li-Ion cell and 2~3 alkaline/NiCd/NiMH
cells. Using high gain Diodes Zetex-brand switching npn-transistors
allow high voltage boost ratios and/or high output current depending
on transistor. The ZXSC410/440 has a shutdown feature that can also
be used for some dimming functionality. ZXSC420/440 includes an
End of Regulation flag that can be used to indicate when the regulator
is no longer able to maintain the regulated output voltage/current or
has reached the required current/voltage. The ZXSC440 combines
the features of the ZXSC410 and ZXSC420 into one device.
Features
1.65V to 8V Supply Range
Typical Output Regulation of ±1%
Over 85% Typical Efficiency
Output Currents Up to 300mA
4.5µA Typical Shutdown Current ZXSC410/440
End of Regulation Output ZXSC420/440
Available in SOT26 and MSOP-8
Totally Lead-Free & Fully RoHS compliant (Notes 1 & 2)
Halogen and Antimony Free. “Green” Device (Note 3)
Pin Assignments
ZXSC410 (SOT26)
DRIVE
VFB
SENSE
V
CC
GND
STDN
1
2
3
8
7
6
ZXSC420 (SOT26)
DRIVE
VFB
SENSE
V
CC
GND
EOR
1
2
3
8
7
6
ZXSC440 (MSOP-8)
DRIVE
VFB
SENSE
N/C
V
CC
GND
EOR
STDN
1
2
3
4
8
7
6
5
Applications
System Power for Battery Portable Products
LCD
Bias
Local Voltage Conversion
High Brightness LED Driving
Notes:
1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.
2. Se information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green" and Lead-free.
3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl)
and <1000ppm antimony compounds.
Typical Applications Circuit
ZXSC410
ZXTN25012EFH
ZHCS2000
22µH
18m?
820m?
22µF
100µF