Click here to ask about the production status of specific part numbers. MAX25431 Automotive 40V, 2.2MHz, H-Bridge Buck-Boost Controller General Description Benefits and Features The MAX25431 is a current-mode buck-boost controller. Meets Stringent Automotive Quality and Reliability The device operates with input voltages from 6V to 36V. Requirements The switching frequency is resistor programmable from Operating V Range: 6V to 36V Allows Operation IN 220kHz to 2.2MHz and can be synchronized to an external In Cold-Crank Conditions clock. Tolerates Input Transients to 40V EN Pin Compatible from +3.3V to +40V The device output voltage is available as 5V fixed or ad- -40C to +125C Automotive Temperature Range justable from 3V to 25V. The wide input voltage range, AEQ-100 Qualified along with its ability to maintain constant output voltage during battery transients, makes the devices ideal for au- Efficient Solution in a Small Solutions Size tomotive applications. In light-load applications, a logic in- Fixed 5V Output Voltage and Adjustable 3V to 25V put (FSYNC) allows the devices to operate in fixed-fre- High Switching Frequency Allows Use of Small quency, forced-PWM mode to eliminate frequency varia- External Components tion and help minimize EMI. Protection features include Small 4mm x 4mm 24-Pin SWTQFN Package cycle-by-cycle current limit followed by hiccup during sus- Low Quiescent Current Helps Designers Meet tained overloads, input under-voltage lockout (UVLO), out- Stringent OEM Current Requirements put overvoltage protection and thermal shut- down with 10A (max) Quiescent Current in Shutdown automatic recovery. EMI Mitigation to meet CISPR25 Class 5 The MAX25431 is available in a small 4mm x 4mm 24-pin Requirements TQFN-EP SW package. 220kHz to 2.2MHz Operating Frequency Fixed-Frequency PWM Mode with Spread Applications Spectrum USB Hubs, Breakout Boxes and Multimedia Hubs External Frequency Synchronization or SYNC OUT Dedicated Charging Modules Capability Rear-Seat Entertainment Modules Ordering Information appears at end of data sheet. Simplified Block Diagram V HVBUS BAT BUCK-BOOST H-BRIDGE FETs 3.0 5.5V IN MAX25431MAX25431 CSP2 USB FB CSN2/OUT TYPE-C PORT FSYNC/SYNCOUT VDDD CC1 / CC2 HVCC1 / HVCC2 USB-PD CONTROLLER MAX25410MAX25410 HVD+ / HVD- D+ / D- 19-100641 Rev 1 8/20MAX25431 Automotive 40V, 2.2MHz, H-Bridge Buck-Boost Controller Absolute Maximum Ratings IN............................................................................ -0.3V to +40V PGND ..................................................................... -0.3V to 0.3V EN, LX1, CSP1, CSN1 ...................................-0.3V to V + 0.3V OUT/FB Short-Circuit Duration ...................................Continuous IN LX2, OUT, CSP2, CSN2 ........................................ -0.3V to +30V Continuous Power Dissipation (Multilayer Board) CSP to CSN ...................................................... -0.3V to +0.3V 24L TQFN.................................................................................. BST1 to LX1, BST2 to LX2......................................... -0.3V to 6V (T = +70C, derate 23.58 mW/C above +70C)....1886.6mW A BST1, DH1 ............................................................... -0.3V to 46V Operating Temperature Range...........................-40C to +125C BST2, DH2 ............................................................... -0.3V to 36V Junction Temperature....................................................... +150C DH to LX .............................................. -0.3V to V + 0.3V Storage Temperature Range ..............................-40C to +150C BST V , PGOOD ............................................................. -0.3V to 6V Lead Temperature (soldering, 10s)................................... +300C CC DL , COMP, FB, SLP, FSW, FSYNCH........ -0.3V to V + 0.3V Soldering Temperature ..................................................... +260C CC 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 SW-TQFN Package Code T2444Y+4C Outline Number 21-100290 Land Pattern Number 90-0022 THERMAL RESISTANCE, FOUR-LAYER BOARD Junction-to-Ambient ( ) 42.4C/W JA Junction-to-Case Thermal Resistance ( ) 3.2C/W JC 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. 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. Electrical Characteristics (V = V = 14V, T = T = -40C to +125C, CVCC = 4.7F, unless otherwise noted.) (Note 1) IN EN A J PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Input Voltage Range V Normal operation (Note 3) 6 36 V IN V Rising 6.5 6.7 IN UVLO R IN UVLO V V Falling 5.8 6.0 IN UVLO F Shutdown Supply I V = 0V 5 10 A IN SHDN EN Current V REGULATOR CC V Output Voltage V V > 6V, I = -1mA to -40mA 5 V CC CC IN VCC V rising 4 4.25 V Undervoltage CC CC UVLO V VCC Lockout V falling 3.5 3.8 CC V Short-Circuit CC IVCC V shorted to AGND 20 mA SC CC Current Limit www.maximintegrated.com Maxim Integrated 2