MAX25221BATJ/V+T Analog Devices

Click here to ask about the production status of specific part numbers. MAX25220/MAX25221/ Automotive 4-Channel TFT-LCD Power MAX25221B/MAX25221C Supplies with VCOM Buffer General Description Benefits and Features The MAX25220/MAX25221/MAX25221B/MAX25221C High Integration are 4-channel TFT-LCD power ICs that provide symmetri- Synchronous Boost Provides AVDD of 4.2V to cal positive AVDD and negative NAVDD supplies as well 10.5V at up to 200mA as VG and VG gate supplies. In addition, a VCOM NAVDD Inverter Output at up to -200mA ON OFF buffer with output voltage range above and below ground 15mA VG Output (7.6V to 20.2V) from 3x ON and a temperature measurement block are integrated Regulated Charge Pump (MAX25221/B/C). VG (-18.2V to -5.6V) from Regulated Charge OFF Pump at up to -15mA (Charge-Pump Doubler) The devices contain non-volatile memory so that the val- Controlled Sequencing during Power-On and ues of all outputs can be calibrated for the lifetime of the Power-Off of All Rails device (maximum five times). VCOM Output Range +1V to -2.49V in 6.83mV 2 Programming is carried out using the built-in I C interface, Steps (MAX25221/B/C) which can also be used to read back diagnostic informa- NTC Input for Temperature Measurement/ tion. A stand-alone mode is also available. Compensation (MAX25221/B/C) The temperature sensor interface block measures the Low EMI temperature optionally, allowing the VCOM output voltage 420kHz/2.1MHz Switching Frequency with Spread to be adjusted depending on the measured temperature. Spectrum The MAX25220/MAX25221/MAX25221B/MAX25221C 2 I C Control/Diagnostic Interface with FLTB (Interrupt) are available in a TQFN package and operate in the -40 to Output +125C temperature range. UV Diagnostics on All Outputs Versatile Applications Non-Volatile Output Voltage Settings on AVDD/ Infotainment Displays NAVDD, VG , VG , VCOM, and Sequencing ON OFF Central Information Displays Supports Stand-Alone Operation Mode after Instrument Clusters Programming Compact 5mm x 5mm TQFN32 Package AEC-Q100 Grade 1 Ordering Information appears at end of data sheet. 19-100803 Rev 5 8/21MAX25220/MAX25221/ Automotive 4-Channel TFT-LCD Power Supplies MAX25221B/MAX25221C with VCOM Buffer Simplified Block Diagram RREF TEMP V18 IN DAC REG IN VCOM 8b ADC FOR TEMP VCOMN BST COMPENSATION NAVDD NEG. VCB REGULATOR TFT BOOST UVLO HVINP CONTROL PGVDD 420kHz/2.1MHz LXP FC2+ FC2- PGND POSITIVE CHARGE PUMP FC1+ 0.9V TEMP WARNING, FC1- SHUTDOWN HVINP VGON REFERENCE POSITIVE AVDD SOFT-START VGOFF AND DISCHARGE ENABLE, CONTROL NEGATIVE NEGATIVE AND FAULT LOGIC CHARGE PUMP SOFT-START DN AND NAVDD DISCHARGE CPGND INVERTING REGULATOR EN PROGRAMMING INN FLTB 420kHz/2.1MHz LOGIC & DGND 2 I C NV MEMORY LXN MAX25221/B/CMAX25221/B/C ADD GND SCL SDA VPROG www.maximintegrated.com Maxim Integrated 2