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Diodes ZXCT1009 User Manual

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ZXCT1009
HIGH-SIDE CURRENT MONITOR
ZXCT1009
Document number: DS33441 Rev. 12 - 2
1 of 8
www.diodes.com
April 2011
© Diodes Incorporated
Description
The ZXCT1009 is a high side current sense monitor. Using
this device eliminates the need to disrupt the ground plane
when sensing a load current.
It takes a high side voltage developed across a current shunt
resistor and translates it into a proportional output current. A
user defined output resistor scales the output current into a
ground-referenced voltage.
The wide input voltage range of 20V down to as low as 2.5V
make it suitable for a range of applications. A minimum
operating current of just 4µA, combined with a SOT23
package make it a unique solution for portable battery
equipment. The SM8 device offers an alternative package
option.
Features
• Low cost, accurate high-side current sensing
• Output voltage scaling
• Up to 2.5V sense voltage
• 2.5V to 20V supply range
• 4A quiescent current
• 1% typical accuracy
• SOT23 and SM8 packages
• AEC-Q100.3 qualified; ZXCT1009FTA only
Applications
• Battery chargers
• Smart battery packs
• DC motor control
• Over current monitor
• Power management
• Level translating
• Programmable current source
•
Pin Assignments
SOT23
Package Suffix - F
SM8
Package Suffix – T8
Application Circuit
I
OUT
V
SENSE+
3V
SENSE-
(Top View)
2
1
I
OUT
V
SENSE+
3V
SENSE-
(Top View)
2
1
I
OUT
N/C
V
SENSE-
N/C
(Top View)
4
2
3
1
5
7
6
8
N/C
V
SENSE+
N/C
N/C
I
OUT
N/C
V
SENSE-
N/C
(Top View)
4
2
3
1
5
7
6
8
N/C
V
SENSE+
N/C
N/C
V
IN
R
SENSE
To load
V
OUT
R
OUT
1
2
3
ZXCT1009
V
SENSE+
V
SENSE-
I
OUT
V
IN
R
SENSE
To load
V
OUT
R
OUT
1
2
3
ZXCT1009
V
SENSE+
V
SENSE-
I
OUT
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Summary of Contents

Page 1 - (Top View)

ZXCT1009HIGH-SIDE CURRENT MONITOR ZXCT1009 Document number: DS33441 Rev. 12 - 2 1 of 8 www.diodes.com April 2011 © Diodes Incorporated Descriptio

Page 2 - ZXCT1009

ZXCT1009HIGH-SIDE CURRENT MONITOR ZXCT1009 Document number: DS33441 Rev. 12 - 2 2 of 8 www.diodes.com April 2011 © Diodes Incorporated Pin Descr

Page 3

ZXCT1009HIGH-SIDE CURRENT MONITOR ZXCT1009 Document number: DS33441 Rev. 12 - 2 3 of 8 www.diodes.com April 2011 © Diodes Incorporated Typical C

Page 4

ZXCT1009HIGH-SIDE CURRENT MONITOR ZXCT1009 Document number: DS33441 Rev. 12 - 2 4 of 8 www.diodes.com April 2011 © Diodes Incorporated Typical Ch

Page 5 - HIGH-SIDE CURRENT MONITOR

ZXCT1009HIGH-SIDE CURRENT MONITOR ZXCT1009 Document number: DS33441 Rev. 12 - 2 5 of 8 www.diodes.com April 2011 © Diodes Incorporated Applicatio

Page 6

ZXCT1009HIGH-SIDE CURRENT MONITOR ZXCT1009 Document number: DS33441 Rev. 12 - 2 6 of 8 www.diodes.com April 2011 © Diodes Incorporated Applicati

Page 7 - © Diodes Incorporated

ZXCT1009HIGH-SIDE CURRENT MONITOR ZXCT1009 Document number: DS33441 Rev. 12 - 2 7 of 8 www.diodes.com April 2011 © Diodes Incorporated Package Ou

Page 8

ZXCT1009HIGH-SIDE CURRENT MONITOR ZXCT1009 Document number: DS33441 Rev. 12 - 2 8 of 8 www.diodes.com April 2011 © Diodes Incorporated IMPORTAN

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