ZXCT1023

ZXCT1023 MICROPOWER FIXED GAIN OF 50 CURRENT MONITOR Description The ZXCT1023 is a precision high-side current sense monitor. Using this type of device eliminates the need to disrupt the ground plane when sensing a load current. The ZXCT1023 has a fixed internal gain of 50 and the only external component required is the external current sense resistor; this combined with its 1.2mm x 1.8mm TDFN package more than quarters the solution size of the ZXCT1010. The wide input voltage range of 20V down to as low as 2.5V makes it suitable for a range of applications. The combination of operation down to 2.5V and just 3.5µA quiescent current makes it ideal for single cell Li-Ion/polymer battery charge/discharge measurement applications. Features Accurate high-side current sensing Fixed gain of 50 output scaling 2.5V – 20V operating range 3.5µA quiescent current TDFN1218 package Pin Assignments TDFN1218-4L OUT 1 4 S+ GND 2 3 S- Top View Applications Battery capacity measurement Battery chargers Over-current monitor Typical Application Circuit S+ RG T VO UT RG RS S- – + GND ZXCT1023 Document number: DS31997 Rev. 3 - 2 1 of 8 www.diodes.com June 2011 © Diodes Incorporated ZXCT1023 MICROPOWER FIXED GAIN OF 50 CURRENT MONITOR Pin Descriptions Pin Name 1 2 3 4 Pin Number OUT GND SS+ Central Paddle Description Voltage output. The output voltage is referenced to GND. The overall voltage gain is 50, i.e., VOUT = 50 x VSENSE where VSENSE = VS+ - VSGround and ...