Click here to ask about the production status of specific part numbers. MAX17703 4.5V to 60V, Synchronous Step-Down Li-Ion Battery Charger Controller General Description Benefits and Features The Himalaya series of voltage regulator ICs, power mod- Optimized Feature-Set for Li-Ion Batteries Including ules, and chargers enable cooler, smaller, and simpler Li-Polymer, LiFePO and Li-Titanate 4 power supply solutions. The MAX17703 is a high-efficien- 4% Charging Current Regulation Accuracy cy, high-voltage, synchronous, step-down, Himalaya Li- 6% Charging Current Monitor Accuracy (ISMON) ion battery-charger controller designed to operate over an 1% Voltage Regulation Accuracy input-voltage range of a 4.5V to 60V. The MAX17703 op- Programmable Constant Current (CC) Mode erates over a wide -40C to +125C temperature range Charging Current (ILIM) and offers a complete charging solution for Li-ion batteries Charge Termination on Full Battery Detection with with a 4% accurate constant current. The output voltage Taper Current Threshold and Taper Timer is programmable from 1.25V up to (V - 2.1V) with DCIN Wide 4.5V to 60V Input-Voltage Range 1% regulation accuracy. Adjustable Output-Voltage Range from 1.25V up to The device uses an external nMOSFET to provide input (V - 2.1V) DCIN supply-side short-circuit protection, preventing battery dis- 125kHz to 2.2MHz Adjustable Frequency with charge. External Clock Synchronization (RT/SYNC) The device charges the battery in constant current (CC) Reliable Operation in Adverse Environmental and constant voltage (CV) states and terminates in a top- Conditions up-charge state after the taper timer is elapsed. The de- Input Short-Circuit Protection (GATEN) vice resumes charging automatically when the battery Safety Timer Feature (TMR) voltage falls below the recharge voltage threshold. De- Deeply Discharged Battery Detection and tection and preconditioning of deeply discharged batteries Preconditioning (DDTH) are enabled by a deep discharge detection comparator. Battery Temperature Sensing and Charge when Within Temperature of Range (TEMP) The MAX17703 is available in a 24-pin 4mm x 4mm TQFN Cycle-by-Cycle Overcurrent Limit package with an exposed pad. Programmable EN/UVLO Threshold Status Output Monitoring Using Open-Drain Applications Outputs (FLG1 and FLG2) Industrial Battery Charging and Energy Storage Overtemperature Protection Power Tools and Handheld Terminals Complies with CISPR 32 (EN55032) Class B Battery Backup for Lighting, Security Cameras, and Conducted and Radiated Emissions Control Panels Wide -40C to +125C Ambient Operating Portable Industrial and Medical Equipment Temperature Range/ -40C to +150C Junction Building and Home-Automation Backup Power Temperature Range Ordering Information appears at end of data sheet. Simplified Application Circuit UP TO 60V LI-ION BATTERY CHARGING LI-ION BATTERY CHARGING CYCLECYCLE INPUT CIN TOPUP- V OUT PRECHARGE CC CV CHARGE DCIN GATEN V IN V OUT DH DDTH L R S I I CHGMAX CHG ISMON LX VOUT I CHG DL MAX17703MAX17703 V REF PGND LI-ION CSP CHARGE BATTERY TEMP CSN TERMINATION R NTC FB V OUT 10% TMR FLG2 t FLG1 19-100908 Rev 0 4/21MAX17703 4.5V to 60V, Synchronous Step-Down Li-Ion Battery Charger Controller Absolute Maximum Ratings V to SGND/EP..................................................... -0.3V to +65V BST to PGND..........................................................-0.3V to +70V IN DCIN to SGND/EP....................... -0.3V to min(+65V, V + 0.6V) DL to PGND................................................-0.3V to (V + 0.3V) IN CC GATEN to DCIN ....................................................... -0.3V to +6V DH to LX .................................................... -0.3V to (BST + 0.3V) GATEN to SGND/EP.... max(-0.3V, DCIN - 0.3V) to (DCIN + 6V) EXTVCC to SGND/EP ............................................-0.3V to +26V V to SGND/EP .......................... -0.3V to min(+6V, V + 0.3V) PGND to SGND/EP ...............................................-0.3V to +0.3V CC IN CSN, CSP to SGND/EP .............................. -0.3V to (V + 0.6V) Continuous Power Dissipation (T = +70C) TQFN (derate IN A CSP to CSN .......................................................... -0.3V to +0.3V 27.85mW/C above +70C) ............................................2222mW V , TMR, ILIM to SGND/EP................... -0.3V to (V + 0.3V) Operating Temperature Range (Note 1) .............-40C to +125C REF CC COMP, ISMON, RT/SYNC to SGND/EP....-0.3V to (V + 0.3V) Junction Temperature.......................................................+150C CC DDTH, FB, TEMP to SGND/EP................................ -0.3V to +6V Storage Temperature Range ..............................-65C to +150C FLG1, FLG2, EN/UVLO to SGND/EP ...................... -0.3V to +6V Lead Temperature (soldering, 10s)...................................+300C LX to PGND............................................................ -0.3V to +65V Soldering Temperature (reflow) ........................................+260C BST to LX ................................................................. -0.3V to +6V Note 1: Junction temperature greater than +125C degrades operating lifetimes. Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Package Information 24 TQFN Package Code T2444+5C Outline Number 21-100405 Land Pattern Number 90-100139 THERMAL RESISTANCE, FOUR-LAYER BOARD Junction to Ambient ( ) 36C/W JA Junction to Case ( ) 3C/W JC For the latest package outline information and land patterns (footprints), go to www.maximintegrated.com/packages. Note that a +, , or - in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status. Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer board. For detailed information on package thermal considerations, refer to www.maximintegrated.com/ thermal-tutorial. Electrical Characteristics (V = V = 24V, C = 4.7F, C = 100nF, C = 4.7F, C = 100nF, C = 470nF, (V to V ) = 5V, V = IN DCIN VIN DCIN VCC VREF BST BST LX EN/UVLO V = V = V = V = V = V = 2.5V, V = V = 1.1V, V = V = V = 0V, RT/SYNC = DH = LX ILIM CSN CSP DDTH TMR TEMP FB EXTVCC SGND/EP PGND DL = GATEN = COMP = FLG1 = FLG2 = ISMON = Unconnected, T = -40C to +125C, unless otherwise noted. Typical values are at A T = +25C. All voltages are referenced to SGND/EP, unless otherwise noted.) (Note 2) A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS POWER SUPPLY DCIN connected to V , External IN 4.5 60 nMOSFET not used DCIN Voltage Range V External nMOSFET used 5.5 60 V Voltage Range 4.5 60 V IN Input Quiescent Current I (V - V ) > 2.1V, V = 1.5V 1.4 2.1 2.8 mA QNS IN CSN FB www.maximintegrated.com Maxim Integrated 2