Click here for production status of specific part numbers. MAX15157D 60V Current-Mode Buck Controller with Lossless Current Sense Benefits and Features General Description Wide Operating Range Reduces Development Time The MAX15157D is the evolution of the MAX15157B HV 8V to 60V Input Voltage Range buck controller family. The MAX15157D implements a 3V to 0.95 V Output Voltage Range single-phase, PWM valley current-mode controller and IN 60kHz to 1MHz Switching Frequency Range drives two external power MOSFETs in a buck Interleaved 1/2/3/4/6/8-Phase Operation configuration. The output voltage can be dynamically set -40C to +125C Temperature Range through the 1V to 2.2V reference input (REFIN) for modular design support. Integration Reduces Design Footprint Internal LDO for Bias Supply Generation The switching frequency is controlled either through Synchronization Input external resistor that sets the internal oscillator, or by Current Monitor Output synchronizing the regulator to an external clock. The Internal 2V Precision Reference device is designed to support 60kHz to 1MHz switching 2 Pullup and 0.6 Pulldown Fast Power FET frequencies. The controller has a dedicated Drivers undervoltage lockout pin (UVLO) and an accurate Accurate MOSFET Dead Time Adaptive Control enable input threshold for flexible power sequence configuration. The controller also has multiple fault- Robust Fault Protection Improves Quality and protection circuits to protect against overcurrent (OCP) Simplifies System Design adjustable through the ILIM pin, output overvoltage Adjustable Input Undervoltage Lockout (OVP), input undervoltage (UVLO), and thermal Adjustable Input EN shutdown. Adjustable Cycle-by-Cycle Overcurrent Protection The MAX15157D features an adjustable internal Input Undervoltage Fault Protection compensation ramp. The device incorporates an Multiple Levels of Overvoltage Protection accurate current-sense amplifier that reports output Thermal Shutdown current through an analog output (IMON). Flexible, Simple System Design The MAX15157D features lossless LS FET R or DSON Adjustable Slope Compensation resistor current sensing. The device allows Discrete Inductor or Compact Coupled Inductor programmable single-phase or multiphase operation, up Architecture to eight interleaved phases, and implements an accurate Lossless R or Resistor Current Sensing DSON current balance scheme. The MAX15157D can operate with either discrete inductors or coupled inductors in Small 5mm 5mm, 32-Pin TQFN, 0.5mm Pitch case of multiphase operation. The device is available in a 5mm 5mm, 32-pin TQFN Applications package and supports a -40C to +125C junction Datacenter temperature range. Industrial Automotive Multiphase Buck Ordering Information appears at end of data sheet. 19-101127 Rev 0 7/21 MAX15157D 60V Current-Mode Buck Controller with Lossless Current Sense Typical Application Circuit 5.6V TO 14V BIAS 8V TO 60V INPUT DRV IN MAX15157D UVLO CSHP CURRENT-SENSE MONITOR EN CSHN ENABLE REFIN 1V TO 2.2V DAC FREQ/CLK BST SYSTEM CLK DH 4V6 LX MOSFET DRIVERS 3V TO 0.95 x VIN OUTPUT SS DL DLCS ILIM PGND RAMP DLCS COMP TO CSHP-CSHN CSLP CURRENT-SENSE CONTROL AGND CSLN TO CSLP-CSLN IMON 50x CURRENT MONITOR OUTPUT PGOOD OPEN-DRAIN POWER GOOD OPTION FOR LOSSLESS LS FET OVP RDSON CURRENT SENSING SYNCIN SYNCOUT FB MULTIPHASE SUPPORT/SYNCHRONIZATION PHASE CSIO Absolute Maximum Ratings IN to PGND ......................................................... -0.3V to +65V EN, FB, PGOOD, REFIN to AGND ....................... -0.3V to +6V CSLP, CSLN to PGND ....................................... -0.3V to +0.3V UVLO, OVP, FREQ/CLK, SYNCIN to AGND ........ -0.3V to +6V CSLP to CSLN ................................................... -0.3V to +0.3V COMP, SS, IMON, RAMP to AGND ...... -0.3V to (V + 0.3V) 4V6 CSHP, CSHN to PGND....................................... -0.3V to +76V SYNCOUT, PHASE, ILIM to AGND ...... -0.3V to (V + 0.3V) 4V6 CSHP to CSHN .................................................. -0.3V to +0.3V CSION, CSIOP to AGND ....................... -0.3V to (V + 0.3V) 4V6 LX to PGND ........................................................... -1V to +76V PGND to AGND .................................................. -0.3V to +0.3V LX + DRV ....................................................................... < +80V Maximum Current out of 4V6 ........................................ 100mA LX to PGND less than 50ns ................................................. -2V Operating Temperature Range ....................... -40C to +125C BST to PGND ...................................................... -0.3V to +80V Continuous Power Dissipation (T = +70C) TQFN (derate A BST to LX ............................................................ -0.3V to +16V 34.5mW/C above +70C) .............................................. 2.76W DH to LX ................................................ -0.3V to (V + 0.3V) BST Junction Temperature .................................................... +150C DL, DLCS to PGND ............................... -0.3V to (V + 0.3V) Storage Temperature Range .......................... -40C to +150C DRV Lead Temperature (soldering, 10s) ............................... +300C DRV to PGND ..................................................... -0.3V to +16V Soldering Temperature (reflow) ..................................... +240C 4V6 to AGND ........................................................ -0.3V to +6V DRV to 4V6 ......................................................... -0.3V to +16V 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. www.maximintegrated.com Maxim Integrated 2