A1205 2 - Continuous-Time Bipolar Switch FEATURES AND BENEFITS DESCRIPTION AEC-Q100 automotive qualified The Allegro A1205 Hall-effect bipolar switch is a next- Quality managed (QM), ISO 26262:2011 compliant generation replacement and extension of the popular Allegro Ideal for applications that require pulsing V to A3134 bipolar switch. The A1205 has identical specifications CC conserve power as the A1201 but is recommended for applications that require Continuous-time operation pulsing V to conserve power. For standard applications, CC Fast power-on time where V is constant, please refer to the A1201 through CC Low noise A1204 devices. Stable operation over full operating temperature range Overall, the A120x family, produced with BiCMOS technology, Reverse battery protection consists of continuous-time devices that feature fast power-on Solid-state reliability time and low-noise operation. Device programming is performed Factory-programmed at end-of-line for optimum after packaging to ensure increased switchpoint accuracy by performance eliminating offsets that can be induced by package stress. Robust EMC performance Unique Hall element geometries and low-offset amplifiers High ESD rating help to minimize noise and to reduce the residual offset Regulator stability without a bypass capacitor voltage normally caused by device overmolding, temperature excursions, and thermal stress. PACKAGES: Not to scale The A120x Hall-effect bipolar switches include the following on a single silicon chip: voltage regulator, Hall-voltage generator, small-signal amplifier, Schmitt trigger, and NMOS output NOT FOR transistor. The integrated voltage regulator permits operation NEW DESIGN from 3.8 to 24 V. The extensive on-board protection circuitry makes possible a 30 V absolute maximum voltage rating for superior protection in automotive and motor commutation 3-pin SOT23W applications, without adding external components. (suffix LH) 3-pin SIP, 3-pin SIP, matrix HD style chopper style (suffix UA) (suffix UA) Continued on the next page VCC Regulator To all subcircuits VOUT Amp Gain Offset Trim Control GND Functional Block Diagram A12051-DS, Rev. 12 June 19, 2018 MCO-0000312A1205 Continuous-Time Bipolar Switch DESCRIPTION (continued) The small geometries of the BiCMOS process allow these devices package, while package UA is a three-lead ultramini SIP for to be provided in ultrasmall packages. The package styles available through-hole mounting. Each package is lead (Pb) free, with 100% provide magnetically optimized solutions for most applications. matte-tin-plated leadframes. Package LH is a SOT23W miniature thin-profile surface-mount SPECIFICATIONS SELECTION GUIDE 1 Part Number Packing Mounting Ambient, T B (Min) B (Max) A RP OP A1205LLHLT-T 7-in. reel, 3000 pieces/reel 3-pin SOT23W surface mount A1205LLHLX-T 13-in. reel, 10000 pieces/reel 3-pin SOT23W surface mount 40C to 150C 50 G 50 G 2 A1205LUA-T Bulk, 500 pieces/bag 3-pin SIP through hole RoHS COMPLIANT 1 Contact Allegro for additional packing options. 2 The chopper-style UA package is not for new design the matrix HD style UA package is recommended for new designs. ABSOLUTE MAXIMUM RATINGS Characteristic Symbol Notes Rating Units 3 Supply Voltage V 30 V CC 3 Reverse Supply Voltage V 30 V RCC 3 Output Off Voltage V 30 V OUT 3 Reverse Output Voltage V 0.5 V ROUT Output Current Sink I 25 mA OUTSINK Magnetic Flux Density B Unlimited G Range E 40 to 85 C Operating Ambient Temperature T A Range L 40 to 150 C Maximum Junction Temperature T (max) 165 C J Storage Temperature T 65 to 170 C stg 3 This rating does not apply to extremely short voltage transients such as Load Dump and/or ESD. Those events have individual ratings, specific to the respective transient voltage event. 2 Allegro MicroSystems, LLC 955 Perimeter Road Manchester, NH 03103-3353 U.S.A. www.allegromicro.com