EVALUATION KIT AVAILABLE Click here for production status of specific part numbers. MAX20414 2.2MHz Sync Boost and Step-Down Converters General Description Benefits and Features The MAX20414 is a high-efficiency, two-output, low- Multiple Functions for Small Size voltage DC-DC converter. OUT1 boosts the input Synchronous 750mA Boost Converter supply up to 8.5V at up to 750mA, while a synchronous - Fixed from 3.8V to 8.5V in 100mV Steps step-down converter (OUT2) operates from a 3.0V to Synchronous Buck Converter Up to 3A 5.5V input voltage range and provides a 0.8V to 3.8V - Factory-Configurable Output Voltage from 0.8V to 3.8V in 25mV Steps output voltage range at up to 3A. The boost converter achieves 2% and the buck converter achieves 1.5% - Resistor-Adjustable 3.0V to 5.5V Operating Supply Voltage output error over load, line, and temperature range. 2.2MHz Operation The IC features a 2.2MHz fixed-frequency pulse-width 93% 3% Undervoltage Threshold modulation (PWM) mode for better noise immunity and 107% 3% Overvoltage Threshold load-transient response, and a pulse-frequency modula- Individual EN Inputs and RESET Outputs tion mode (skip) for increased efficiency during light-load High Precision operation. The 2.2MHz frequency operation allows for the use of all-ceramic capacitors and minimizes external com- 2% Output-Voltage Accuracy (OUT1), and 1.5% Output-Voltage Accuracy (OUT2) ponents footprint. The programmable spread-spectrum frequency modulation minimizes radiated electromagnetic Good Load-Transient Performance emissions. Integrated low R switches improve DS(ON) Robust for the Automotive Environment efficiency at heavy loads and make the layout a much Current-Mode, Forced-PWM, and Skip Operation simpler task with respect to discrete solutions. Overtemperature and Short-Circuit Protection 4mm x 4mm 24-Pin TQFN The IC is offered with either a factory-preset or resistor- adjustable output voltage on the step-down converter. The -40C to +125C Automotive Temperature Range boost converter output voltage is factory-preset. Other features include soft-start, overcurrent, and overtemper- Typical Operating Circuit ature protections. This high-efficiency two-output low- voltage DC-DC converter is available in a lead(Pb)-free, 24-pin TQFN package (see the Ordering Information table for options). REG1 EN1 0.33F EN2 OUT1 22F 3.3V SYNC 3.3V LX1 Ordering Information appears at end of data sheet. PV 2.2H 4.7F 1F PGND1 GND MAX20414 3.3V PV2 4.7F RESET1 LX2 0.68H 47F RESET2 OUT2 PGND2 19-8781 Rev 0 2/17MAX20414 2.2MHz Sync Boost and Step-Down Converters Absolute Maximum Ratings PV2 to PGND ........................................................-0.3V to +6V LX1 Continuous RMS Current ................................................2A PV to GND...............................................................-0.3V to +6V LX2 Continuous RMS Current ................................................3A REG1 to GND...........................................-0.3V to OUT1 + 0.3V Output Short-Circuit Duration ....................................Continuous EN1, EN2, SYNC to GND ...........................-0.3V to V + 0.3V Continuous Power Dissipation (T = +70C) PV A RESET1, RESET2, GND ........................................-0.3V to +6V 24-Pin TQFN-EP (derate 30.3 mW/C > +70C) .......2222mW OUT1 to PGND1 ...................................................-0.3V to +10V Operating Temperature Range ......................... -40C to +125C OUT2 to PGND2 ....................................... -0.3V to V + 0.3V Junction Temperature ......................................................+150C PV2 LX1 to PGND1.........................................-0.3V to V + 0.3V Storage Temperature Range ............................ -65C to +150C OUT1 LX2 to PGND2........................................... -0.3V to V + 0.3V Lead Temperature (soldering, 10s) .................................+300C PV2 GND to PGND ......................................................-0.3V to +0.3V 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 TQFN TQFN Package Drawing Link PACKAGE CODE T2444+4C Outline Number 21-0139 Land Pattern Number 90-0022 Thermal Resistance, Single-Layer Board: Junction-to-Ambient Thermal Resistance ( ) 48C/W JA Junction-to-Case Thermal Resistance ( ) 3C/W JC Thermal Resistance, Four-Layer Board: Junction-to-Ambient Thermal Resistance ( ) 36C/W JA Junction-to-Case Thermal Resistance ( ) 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 = V = 3.3V, V = V = 3.3V, T = T = -40C to +125C, unless otherwise noted. Typical values are at PV1 PV2 PV EN1 EN2 A J T = +25C under normal conditions, unless otherwise noted.) (Note 1) A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Supply Voltage Range V Fully operational 3.0 5.5 V IN UVLO Rising 2.7 2.9 V R UVLO UVLO Falling 2.4 2.6 V F Shutdown Supply Current I EN1, EN2 = low 1.7 5 A IN EN1 = high, I = 0mA, skip, OUT1 I 130 210 IN1 V 104% above regulation point OUT1 Supply Current A EN2 = high, I = 0mA, skip, OUT2 I 80 160 IN2 V 104% above regulation point OUT2 Maxim Integrated 2 www.maximintegrated.com