ZXSC410/ZXSC420/ZXSC440

Document number: DS33618 Rev. 6 - 2

1 of 17

www.diodes.com

August 2015

© 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 makes them suitable for operation for 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 allows high-voltage boost ratios and/or high

output current depending on the 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

GND

STDN

1

2

3

8

7

6

ZXSC420 (SOT26)

DRIVE

VFB

SENSE

GND

EOR

1

2

3

8

7

6

ZXSC440 (MSOP-8)

DRIVE

VFB

SENSE

N/C

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. See http://www.diodes.com/quality/lead_free.html

for more 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

Ω

820m

Ω

22µF

100µF