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LM536023QPWPTQ1 Datasheet(PDF) 10 Page - Texas Instruments |
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LM536023QPWPTQ1 Datasheet(HTML) 10 Page - Texas Instruments |
10 / 40 page + - + - CONTROL LOGIC DRIVER HS CURRENT SENSE LS CURRENT SENSE OSCILLATOR PWM COMP. ERROR AMPLIFIER MODE LOGIC RESET CONTROL SW VIN PGND FB EN FPWM INT. REG. BIAS BIAS VCC CBOOT SYNC AGND * * * = Not used in -ADJ RESET 1.0V Reference ENABLE LOGIC 10 LM53602-Q1, LM53603-Q1 SNVSA42B – JUNE 2015 – REVISED MAY 2016 www.ti.com Product Folder Links: LM53602-Q1 LM53603-Q1 Submit Documentation Feedback Copyright © 2015–2016, Texas Instruments Incorporated 8 Detailed Description 8.1 Overview The LM5360x family of devices are synchronous current mode buck regulators designed specifically for the automotive market. The regulator automatically switches between PWM and PFM depending on load. At heavy loads the device operates in PWM at a switching frequency of 2.1 MHz. The regulator's oscillator can also be synchronized to an external system clock. At input voltages above about 20 V, the switching frequency reduces to maintain regulation during conditions of abnormally high battery voltage. At light loads the mode changes to PFM, with diode emulation allowing DCM. This reduces input supply current and keeps the efficiency high. The user can also choose to lock the mode in PWM (FPWM) so that the switching frequency remains constant regardless of load. A RESET flag is provided to indicate when the output voltage is near its regulation point. This feature includes filtering and a delay before asserting. This helps to prevent false flag operation during output voltage transients. Please note that, throughout this data sheet, references to the LM53603-Q1 apply equally to the LM53602-Q1. The difference between the two devices is the maximum output current and specified MOSFET current limits. 8.2 Functional Block Diagram |
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