Click here for production status of specific part numbers. MAX20048 Automotive 40V, 55A I , 2.2MHz, Q H-Bridge Buck-Boost Controller General Description Benefits and Features The MAX20048 is a current-mode buck-boost controller. Meets Stringent Automotive Quality and The device operates with input voltages from 4.5V to Reliability Requirements 36V while using only 55A quiescent current at no load. Operating V Range: 2V to 36V Allows Operation IN Once the startup conditions are satisfied, the device can In Cold-Crank Conditions operate over an extended input voltage range of 2V to Tolerates Input Transients to 40V 36V. The switching frequency is resistor programmable EN Pin Compatible from +3.3V to +40V from 220kHz to 2.2MHz and can be synchronized to an -40C to +125C Automotive Temperature Range external clock. AEQ-100 Qualified The device output voltage is available as 5V fixed or Efficient Solution in a Small Solutions Size adjustable from 4V to 25V. The wide input voltage Skip Mode for Efficient Low Power Operation range, along with its ability to maintain constant output Fixed 5V Output Voltage and Adjustable 4V to 25V voltage during battery transients, makes the devices ideal High Switching Frequency Allows Use of Small for automotive applications. In light-load applications, a External Components logic input (FSYNC) allows the devices to operate either Small 4mm x 4mm 24-Pin SWTQFN Package in skip mode for reduced current consumption, or fixed- frequency, forced-PWM mode to eliminate frequency Low Quiescent Current Helps Designers Meet variation and help minimize EMI. Protection features Stringent OEM Current Requirements include cycle-by-cycle current limit followed by hiccup 55A Quiescent Current When in Stand-By Mode during sustained overloads, input under-voltage lockout 10A (max) Quiescent Current in Shutdown (UVLO), output overvoltage protection and thermal shut- EMI Mitigation to meet CISP25 Class 5 Requirements down with automatic recovery. 220kHz to 2.2MHz Operating Frequency The MAX20048 is available in a small 4mm x 4mm 24-pin Fixed-Frequency PWM Mode TQFN-EP SW package. External Frequency Synchronization or SYNC OUT Capability (Selectable by OTP Option) Applications Spread Spectrum Can Be Enabled or Disabled for Infotainment Systems the IC by OTP Option Body Electronics Start-Stop Systems Point of Load Power Supply USB Power Delivery Ordering Information appears at end of data sheet. 19-100306 Rev 2 7/18MAX20048 Automotive 40V, 55A I , 2.2MHz, Q 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 45 mW/C above +70C) .........2000mW 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 ( ) 20C/W JA Junction-to-Case ( ) 6C/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, C = 4.7F, unless otherwise noted.) (Note 1) IN EN A J VCC PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Input Voltage Range V Normal operation 4.5 36 V IN Input Voltage Range V After initial startup condition is satisfied 2 36 V IN Shutdown Supply Current I V = 0V 5 10 A IN SHDN EN V = V , V = 5V, no load, EN IN OUT Standby Supply Current I 55 135 A IN STANDBY V = 0V, SS = off FSYNC Undervoltage Lockout UVLO V rising 4.2 4.45 V IN RIS IN Undervoltage Lockout UVLO V falling, output enabled 1.95 V IN FALL IN V REGULATOR CC V Output Voltage V V > 6V, I = -1mA to -40mA 5 V CC CC IN VCC V Dropout Voltage VCC V = 4.5V, V = 4V, I = -20mA 0.1 0.2 V CC DROP IN OUT VCC V Undervoltage Lockout UVLO V rising 4 4.25 V CC VCC CC V Undervoltage Lockout UVLO V falling 3.5 3.8 V CC VCC CC V Short-Circuit CC IVCC V shorted to AGND 100 mA SC CC Current Limit Maxim Integrated 2 www.maximintegrated.com