ZXCT1109SA-7 Diodes Incorporated

A Product Line of Diodes Incorporated ZXCT1107/1109/1110 LOW POWER HIGH-SIDE CURRENT MONITORS Description Pin Assignments The ZXCT1107/09/10 are high side unipolar current sense ZXCT1107 monitors. These devices eliminate the need to disrupt the Top View ground plane when sensing a load current. 2 2 S- S- The wide common-mode input voltage range and low quiescent current coupled with SOT23 packages make OUTOUT 11 them suitable for a range of applications including adapters, automotive and systems operating from industrial 3 3 S+ S+ 24V rails. The device is line powered and as such doesnt need a separate supply rail. ZXCT1109 Top View Quiescent current is only 3A thereby minimising current sensing error. One external gain setting resistor increases 2 2 S+ S+ versatility by permitting wide gain ranges. OUTOUT 11 Features 3 3 S- S- Wide supply and common-mode voltage range: 2.5V to 36V SOT23 packages ZXCT1110 o 3-pin ZXCT1107/09 Top View o 5-pin ZXCT1110 Low quiescent current (3A). NNCC 11 5 5 S-S- Extended industrial temperature range -40 to 125C AEC-Q100 Grade1 Automotive qualified variants GND GND 22 OUTOUT 33 4 4 S+S+ Applications Automotive current measurement Industrial applications current measurement Battery management Over current monitor Power Management Typical Application Circuit 1 of 16 JULY 2011 ZXCT1107/1109/1110 Diodes Incorporated www.diodes.com Document number: DS35033 Rev. 3 - 2 NEW PRODUCT A Product Line of Diodes Incorporated ZXCT1107/1109/1110 LOW POWER HIGH-SIDE CURRENT MONITORS Pin Descriptions Package SOT23 SOT25 Description Name ZXCT1107 ZXCT1109 ZXCT1110 1 1 OUT 1 1 3 Output pin. Current output. This is the positive input of the current monitor and has a wide common-mode input range. This also acts as the analog supply and S+ 3 2 4 provides power to internal circuitry. The current through this pin varies with differential sense voltage. This is the negative input of the current monitor and has a wide S- 2 3 5 common-mode input range. GND - - 2 Ground pin and substrate connection. NC - - 1 No connection Notes. 1. For the ZXCT1107 and ZXCT1109 pin 1 (OUT) acts as both the output pin and substrate connection. This means that for the ZXCT1107 and ZXCT1109 the minimum rail voltage that can be used is 2.5V + V (see applications section for more details). OUT Absolute Maximum Ratings Description Rating Unit Voltage on S- and S+ relative to OUT (ZXCT1107/9) -0.3 to 40 V Voltage on S- and S+ relative to GND (ZXCT1110) -0.3 to 40 V Voltage on OUT to GND (ZXCT1110) -0.3 to V V S+ 2,3 Differential Sense Voltage, V -0.3 to 0.8 V SENSE 3 Current into S+ and S- 8.5 mA Storage Temperature -55 to 150 C Maximum Junction Temperature 150 C Package Power Dissipation (T = 25C) A SOT23 300 (De-rate to Zero at 150C) mW SOT25 300 (De-rate to Zero at 150C) ESD Ratings Human Body Model 1000 V Machine Model 150 V Operation above the absolute maximum rating may cause device failure. Operation at the absolute maximum ratings, for extended periods, may reduce device reliability. Notes: 2. V = V - V SENSE S+ S- 3. The differential input voltage limit, V - V , may be exceeded provided that the input current limit into S+ or S- is not exceeded. S+ S- 2 of 16 JULY 2011 ZXCT1107/1109/1110 Diodes Incorporated www.diodes.com Document number: DS35033 Rev. 3 - 2 NEW PRODUCT