Evaluation Kit Design Tools Support Available Resources and Models Click here to ask an associate for production status of specific part numbers. 5.5V to 60V, 6A Current-Limiter with OV, MAX17526A/MAX17526B/ UV, Reverse Protection, and Power Limit MAX17526C General Description Benefits and Features The Olympus series of ICs are the industry s smallest Robust Protection Reduces System Downtime and robust integrated system protection solutions. The Wide Input-Supply Range: +5.5V to +60V MAX17526A adjustable power limiter offers a unique Active Power Limit to Protect Supply or Load feature to limit power drawn from supplies or delivered to (MAX17526A) loads, amongst a host of protection features. These pro- Programmable Input Overvoltage Setting up to 40V tection features include adjustable input overvoltage and Negative Input Fault Tolerant (with External NFET) undervoltage protection, positive and negative input volt- Reverse Current Protection (with External NFET) age protection, overcurrent protection, reverse-current protection and overtemperature protection. The device Low R Internal NFET (30m typ) ON features a built-in low R (30m typ) NFET, and an ON Dual-Stage Current Limiting integrated gate drive for an optional external NFET. 1.0x Startup Current (MAX17526A) The device highlights a power limit feature that allows 1.5x Startup Current (MAX17526B) programmed reduction in current limit, as an inverse func- 2.0x Startup Current (MAX17526C) tion of an external voltage. Input or output power limit is achieved by limiting the current through the device as a Fast Startup and Brownout Recovery function of input or output voltages. Continuous Current-Limit During Startup Input undervoltage protection level is adjustable between Thermal Foldback Current-Limit 5.5V and 24V, and input overvoltage protection level is Flexible Design to Maximize Reuse and Minimize adjustable between 6V and 40V. The input undervolt- Requalification age lockout (UVLO) threshold and overvoltage lockout (OVLO) threshold are adjusted using external resistors. Adjustable UVLO and OVLO Thresholds The device offers a factory preset internal UVLO and Programmable Forward-Current Limit: 0.2A to 0.6A OVLO thresholds at 12.4V (typ) and 36.2V (typ) respec- with 10% Accuracy and 0.6A to 6.0A with 8.5% tively. The factory preset levels can be invoked by con- Accuracy Over Full Temperature Range necting the UVLO and/or the OVLO pins to GND. Programmable Overcurrent Response: Continuous, The device features programmable current limit protec- Autoretry, and Latch-Off Modes tion up to 6A. Current limit threshold is programmed by Logic Level and High-Voltage Enable Inputs connecting a resistor from the SETI pin to GND. When (EN and HVEN) the device current reaches the programmed threshold, Protected External NFET Gate Drive the controller inside the device prevents further increase in current by modulating the internal NFET resistance. Reduced Solution Footprint The device offers three different behavioral modes under 20-Pin 5mm x 5mm TQFN-EP Package current limited operation: Continuous mode, Autoretry Integrated NFET for Common-Use Protection mode, and Latch-off mode. The continuous current limit Requirements feature offers control of inrush current at startup while charging high capacitances at the output side. Two addi- Applications tional part options that feature a dual-stage current-limit mode, in which the current is continuously limited to 1.5x Industrial Power Distribution Systems (MAX17526B) and 2.0x (MAX17526C), the programmed Control and Automation limits, are available upon request. The power limit feature Motion Control Drives is disabled in the MAX17526B/C part options. The voltage Human Machine Interfaces appearing on the SETI pin is proportional to the instan- taneous current flowing through the device, and can be Ordering Information appears at end of data sheet. read by the supervisory system. MAX17526A also offers reverse-current protection and input reverse voltage polarity protection when deployed with an external NFET, and built-in overtemperature protection. It is available in a 20-pin 5mm x 5mm TQFN- EP package. The device operates over -40C to +125C extended temperature range. 19-100358 Rev 3 11/21 2021 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. One Analog Way, Wilmington, MA 01887 U.S.A. Tel: 781.329.4700 2021 Analog Devices, Inc. All rights reserved.MAX17526A/MAX17526B/ 5.5V to 60V, 6A Current-Limiter with OV, MAX17526C UV, Reverse Protection, and Power Limit Typical Operating Circuit VIN V NFET SYS C IN IC CIN GN IN IN IN IN IN SN V IN UVLO SYSTEM OUT CONTROLLER R1* OUT R2* VOUT V SYS OUT ADC MAX17526A C OVLO OUT OUT V IN R3* 220k R4* R SETI OUT SETI HVEN FAULT FLAG PLIM GND EN EN V CLMODE (EP) OUT R5* 220k R6* *USE R1, R2, R3 AND R4 TO PROGRAM UVLO/OVLO LIMITS. CHOOSE LARGE R1 AND R3 TO MINIMIZE BRANCH CURRENT. TIE UVLO AND OVLO PINS TO GND TO USE INTERNAL, FACTORY PRESET LMITS. *USE R5 AND R6 TO PROGRAM POWER LIMIT. TIE PLIM TO GND TO DISABLE POWER LIMIT FUNCTION. Analog Devices 2 www.analog.com