Click here for production status of specific part numbers. MAX20077/MAX25277 36V, 2.5A Mini Buck Converters with 3.5A I Q General Description Benefits and Features The MAX20077/MAX25277 is a small, synchronous buck Synchronous DC-DC Converter with Integrated FETs converter with integrated high-side and low-side switches. MAX20077ATCA/VY+/B/D/E = 2.5A I OUT The device is designed to deliver up to 2.5A (2.0A for the MAX20077ATCC/VY+ = 2.0A I OUT MAX20077ATCC/VY+ variant) with 3.5V to 36V input volt- 3.5A Quiescent Current in Standby Mode ages while using only 3.5A quiescent current at no load. Small Solution Size Saves Space The device provides an accurate output voltage of 2% 20ns Minimum On-Time in FPWM mode within the normal 6V to 18V operation 2.1MHz or 400kHz Operating Frequency input range. With 20ns minimum on-time capability, the Programmable 1V to 10V Output converter is capable of large input-to-output conversion Voltages, or Fixed 5V/3.3V Options Available ratios. Voltage quality can be monitored by observing Fixed 3.5ms Internal Soft-Start the PGOOD signal. The device can operate in dropout Fixed Output Voltage with 2% Output Accuracy by running at 99% duty cycle, making it ideal for auto- in FPWM Mode (5V/3.3V), or Externally Resistor motive and industrial applications. The device offers Adjustable two fixed 5V and 3.3V output voltages. In addition, the (1V to 10V) with 1.5% FB Accuracy device can be configured for 1V to 10V output voltages Innovative Current-Mode-Control Architecture using an external resistor-divider. Frequency is internally Minimizes Total Board Space and BOM Count fixed at 2.1MHz, which allows for small external compo- PGOOD Output and High-Voltage EN Input Simplify nents and reduced output ripple, and guarantees no AM Power Sequencing interference. A 400kHz option is also offered to provide Protection Features and Operating Range Ideal for minimum switching losses and maximum efficiency. The Automotive Applications device automatically enters skip mode at light loads with 3.5V to 36V Operating V Range IN ultra-low 3.5A quiescent current at no load. The device 40V Load-Dump Protection offers pin-enabled spread-spectrum-frequency modula- 99% Duty-Cycle Operation with Low Dropout tion designed to minimize EMI-radiated emissions due to -40C to +125C Automotive Temperature Range the modulation frequency. AEC-Q100 Qualified The MAX20077/MAX25277 variants are available in a Simplified Block Diagram small (3mm x 3mm), 12-pin, side-wettable TDFN pack- age with an exposed pad, and requires very few external SPS SYNC components. HIGH- REF EN BST VOLTAGE BANDGAP OSC LDO BIAS SUP Applications CLK Automotive CURRENT SENSE SOFT- + START SLOPE COMP Industrial LX LOGIC High-Voltage DC-DC Converters CONTROL BIAS OUT PWM EAMP FB FB PGND Ordering Information appears at end of data sheet. COMP SW1 VRESET MAX20077 SW2 PGOOD AGND 19-100267 Rev 6 6/19MAX20077/MAX25277 36V, 2.5A Mini Buck Converters with 3.5A I Q Absolute Maximum Ratings SUP .......................................................................-0.3V to +40V OUT Short-Circuit Duration ......................................Continuous EN......................................................................... -0.3V to +40V ESD Protection BST to LX (Note 1) ................................................................+6V Human Body Model ........................................................2kV BST ........................................................................-0.3V to +45V Machine Model .............................................................200V FB .............................................................-0.3V to V + 0.3V Continuous Power Dissipation (T = +70C) BIAS A SYNC........................................................-0.3V to V + 0.3V 12-pin SWTDFN BIAS SPS ..........................................................-0.3V to V + 0.3V (derate 24.4mW/C above +70C) ............................1951mW BIAS OUT .......................................................................-0.3V to +18V Storage Temperature Range ............................ -65C to +150C PGOOD ...................................................................-0.3V to +6V Operating Junction Temperature (Note 6) ........ -40C to +150C PGND to AGND ....................................................-0.3V to +0.3V Lead Temperature (Soldering, 10s) .................................+300C BIAS .....................................................................-0.3V to +6.0V Soldering Temperature (Reflow) ......................................+260C LX Continuous RMS Current ...................................................3A 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. Note 1: LX has internal clamp diodes to PGND/AGND and SUP. Applications that forward bias these diodes should take care not to exceed the ICs package power-dissipation limits. Recommended Operating Conditions Ambient Temperature Range ........................... -40C to +125C Package Information PACKAGE TYPE: 12 SWTDFN Package Code TD1233Y+2C Outline Number 21-100176 Land Pattern Number 90-100072 PACKAGE TYPE: 12 SWTDFN Package Code TD1233Y+3C Outline Number 21-100284 Land Pattern Number 90-100072 THERMAL RESISTANCE, FOUR-LAYER BOARD Junction to Ambient ( ) 41C/W JA Junction to Case ( ) 9C/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 4-layer board. For detailed information on package thermal considerations, refer to www.maximintegrated.com/thermal-tutorial. 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