MAX38802/MAX38803 Integrated, Step-Down Switching Regulators with Selectable Applications Configurations General Description Features and Benefits The MAX38802/MAX38803 are fully-integrated, highly High-Efficiency Solution efficient switching regulators for applications operating Up to 97% Peak from 6.5V to 14V input supplies that require up to 25A Up to 87% Full-Load Up to 96% Light-Load Efficiency at 1A with DCM maximum load. These single-chip regulators provide a compact high-efficiency, power-delivery solution for Enabled precision outputs that demand fast transient response. Flexible Design Allows Early PCB Definition Footprint Compatible with MAX38800 (9A) and The two devices have different programmability options (see Tables 3a and 3b for details) to enable a wide range of MAX38801 (15A) Programmable Switching Frequency Up to 1MHz configurations. The programmable features include: internal/external reference voltage, output voltage set- Programmable Soft-Start and STAT Delay Timings Programmable Reference Voltage with External point, switching frequency, overcurrent protection level Input Option (OCP), and soft-start timing. Discontinuous current mode Programmable Positive and Negative OCP Limit (DCM) operation can be enabled through pin-strapping to improve light-load efficiency. Advanced Architecture, Protection and Reporting Guarantees Reliable Designs The MAX38802/MAX38803 include multiple protection Analog Current or Temperature Reporting and measurement features. Positive and negative cycle- Differential Remote Sense with Open-Circuit by-cycle OCP, short-circuit protection and overtemperature Detection protection (OTP) ensure robust design. Input undervoltage Fast Transient Response with Quick-PWM and overvoltage lockout shut down the regulator to Architecture prevent damage when the input voltage is out of specification. Percentage-Based Output Power Good and OVP Regulation is halted in case of an output overvoltage Open-Drain Status Indicator (STAT) Pin (OVP) event. A status pin indicates that the output voltage Input Undervoltage and Overvoltage Lockout is within range and the output voltage is in regulation. Adaptive Dead Time Control The device has an analog output that can be configured to report output current or junction temperature with 5% Saves Board Space and 8C accuracy, respectively. Integrated Boost Switch 27-Bump WLCSP (2.2mm x 3.8mm) Footprint The devices are available in a 27-bump (2.2mm x 3.8mm) Operation Using Ceramic Input and Output WLCSP package that provides low thermal resistance Capacitors and minimizes the PCB area. Basic Application Circuit Applications Servers/Servers V V CC DDH I/O and Chipset Supplies C C IN VCC V V CC DDH GPU Core Supply C BST V OUT MAX38802 DDR Memory: V , V and V BST DDQ PP TT MAX38803 R STAT L Point-of-Load (PoL) Applications OUT VX RAMP COMPENSATION R R DEVICE CURRENT INPUT OUTPUT STAT SENSE+ C C R1 R2 TYPE RATING VOLTAGE VOLTAGE R OE OE SENSE- RFB1 MAX38802 25A 6.5V to 14V 0.6V to 5.5V AGND GND CLEAD RLEAD PGM R MAX38803 LAG LEAD COMPENSATION C SEL C R SEL OUT R C FB2 LAG Ordering Information appears at end of data sheet. Quick-PWM is a trademark of Maxim Integrated Products, Inc. 19-100057 Rev 1 7/20 LAG COMPENSATIONMAX38802/MAX38803 Integrated, Step-Down Switching Regulator with Selectable Applications Configurations Absolute Maximum Rating Input/Output Pin Voltages V Pin - VX Pin Differential 25ns (Note 2) ........-10V to +23V DDH (OE, PGM, SENSE+, SENSE-) ...........................-0.3V to +2V BST Pin (BST) DC...................................................-0.3V to 20V Regulator Status Output (STAT) ..............................-0.3V to +4V BST Pin (BST) 25ns ................................................-7.0V to 27V Input Voltage (V ) DC ......................................-0.3V to +16V BST Pin - VX Pin Differential ...................................................4V DDH Bias Supply Voltage (V ) ......................................-0.3V to +2V Junction Temperature (T ) .................................................150C CC J Switching Node Voltage (VX) DC ..........................-0.3V to +16V Storage Temperature Range ...............................-65C to 150C Switching Node Voltage (VX) 25ns (Note 1) ..........-10V to +23V Peak Reflow Temperature Lead-Free ...............................260C 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. Operating Ratings Input Voltage (V ) ................................................6.5V to 14V Junction Temperature (T ) ......................................0C to 125C DDH J Bias-Supply Voltage (V ) ..................................1.71V to 1.89V Peak Output Current (I ) ...........................................40A CC PK+,MAX Output Current (I ) ...........................................................25A OUT Package Information 27-Bump WLCSP Package Code C272C3+1 Outline Number 21-0928 Land Pattern Number Refer to Application Note 1891 THERMAL RESISTANCE, FOUR-LAYER BOARD Junction to Ambient ( ) 19C/W (Note 3) JA Junction to Case ( ) 0.75C/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. Note 1: The 25ns rating is the allowable voltage on the VX node in excess of the -0.3V to 16V DC ratings. The VX voltage can exceed the DC rating in either the positive or negative direction for up to 25ns per cycle. Note 2: The V input pin AC voltage should not exceed 19V (25ns). This measurement is taken at the V pin referenced to V DDH DDH SS pin immediately adjacent using a high-frequency scope probe with I at I . A high-frequency input bypass capacitor LOAD MAX must be located less than 60 mils from the V pin as specified in the Printed Circuit Board Layout section. DDH Note 3: Data taken using Maxims evaluation kit with no air flow and no heatsink. Maxim Integrated 2 www.maximintegrated.com