ZXCT1021 - Low offset high-side current monitor

Product description The ZXCT1021 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 ZXCT1021 provides a fixed gain of 10 for applications where minimal sense voltage is required. The very low offset voltage enables a typical accuracy of 3% for sense voltages of only 10mV, giving better tolerances for small sense resistors necessary at higher currents. The wide input voltage range of 20V down to as low as 2.5V make it suitable for a range of applications. With a minimum operating current of just 25µA, combined with its SOT23-5 package make it suitable for portable battery equipment too.

Datasheet Issue 9 - Jul 2007 Subscribe to our RSS datasheet feed Click to read the latest disclaimer information for Zetex parts.

Features Accurate high-side current sensing Output voltage scaling 2.5V - 20V supply range 25µA quiescent current 1% typical accuracy

Applications Battery charging Smart battery packs DC motor control Over current monitor Power management Programmable current monitor Level translating

Ordering information

Order reference	Package	Part mark	Status	Reel size	Quantity per reel	Tape width	Price ($) 1k†	Purchase
ZXCT1021E5TA	SOT23-5	1021	Active	7"	3000	8mm	0.543

† Indicative/budgetary information

This product is Pb-free/ROHS - compliant (EC directive 2002/95/EC).
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Pin out

SOT23-5 Pinout details are only provided for active Zetex parts.

Design tools

Application notes AN39 - Current measurement applications handbook. AN46 - Zetex' current monitors with PolySwitch™ overcurrent device Spice model

Applications

Power management Forward DC-DC converter with active clamp Forward DC-DC converter with active clamp with synchronous rectification Generic power supply overview High-side current monitor for DC-DC converter load current

Package information

SOT23-5 Package information (207 Kb) containing Package dimensions Pad layout Reflow Soldering Profile (88 Kb) Wave Soldering Profile (87 Kb) Moisture Sensitivity Level for ZXCT1021 = 1

Chemical content reporting SOT23-5 epoxy die attach material datasheet (193 Kb) SOT23-5 epoxy die attach ICP analysis (1.3 Mb)

Reliability information SOT23-5 Reliability data (31 Kb)

Press release

Monitor reduces sense voltage for high current detection

Articles

High-side ICs simplify current measurements