ZXCT1009_11 Datasheet, PDF (1/8 Pages) Diodes Incorporated – HIGH-SIDE CURRENT MONITOR

ZXCT1009
HIGH-SIDE CURRENT MONITOR
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
• 4μA quiescent current
• 1% typical accuracy
• SOT23 and SM8 packages
• AEC-Q100.3 qualified; ZXCT1009FTA only
Pin Assignments
SOT23
Package Suffix - F
V_SENSE- 3
V_{SE NS E+}
2
1 I_OUT
(Top View)
SM8
Package Suffix – T8
V_SENSE- 1
N/C ²
V_SENSE+ 3
I_OUT 4
8 N/C
7 N/C
6 N/C
5 N/C
(Top View)
Applications
• Battery chargers
• Smart battery packs
• DC motor control
• Over current monitor
• Power management
• Level translating
• Programmable current source
•
Application Circuit
V_IN
R_SENSE
To load
2
V _{S E NSE +}
3
V _{SE NSE-}
ZXCT1009
I_{O UT}
1
V_OUT
R_OUT
ZXCT1009
Document number: DS33441 Rev. 12 - 2
1 of 8
www.diodes.com
April 2011
© Diodes Incorporated