Click here to ask about the production status of specific part numbers. MAX20049 Flexible, Compact Quad Power Supply with 2.2MHz, 500mA Buck Converters and Dual LDOs for Automotive Camera Modules General Description Benefits and Features The MAX20049 is a dual step-down converter IC with two Small Solution Size low-dropout regulators (LDOs), providing a single-chip so- 16-Pin Side-Wettable (3mm x 3mm) TQFN with an lution for automotive cameras. The two step-down con- Exposed Pad verters are designed for fixed-frequency PWM operation Low On-Time Architecture Eliminates the Need for with input voltages from 5V to 17V for MAX20049, 4V to Cascading Bucks 17V for MAX20049C, and 3.5V to 17V for MAX20049D. Wide 3.5V to 17V Input Voltage Range for Power- The dedicated high-voltage inputs allow for a flexible solu- Over-Coax Cables tion. Fixed Output-Voltage Options The IC provides voltage monitoring on all four output rails. EMI Solutions Once an overvoltage or undervoltage is detected, power Optional Spread-Spectrum Frequency Modulation good gets pulled low. To accommodate long and inexpen- Pinout Placement Allows for Tight PCB Layout of sive coax cables, the device has a 500mV SUP1 hystere- Switching Nodes sis. Both bucks offer very low on-time and allow operation Self-Protected and Robust from 17V input to 0.9V output. High-frequency operation Overvoltage and Undervoltage Monitoring, allows for an all-ceramic capacitor design and small-size Overvoltage Protection, Thermal Shutdown, and external components. The low-resistance on-chip switch- Short- Circuit Protection es ensure high efficiency while minimizing critical induc- 500mV Input Hysteresis Allows for Long, Low-Cost tances. Cables During Slow Starts Output voltages are factory set and cover various sensor Automotive Ready imagers needing 3.3V, 3.0V, 2.9V, 2.8V, or 2.7V. The sec- Automotive Temperature Range ondary supplies cover the typical 1.8V, 1.2V, 1.1V, and < AEC-Q100 Qualified 1.0V rails for the serializer and memory. The Output-Volt- age Selection section covers all the voltage options for Ordering Information appears at end of data sheet. flexibility in the camera design. Protection features include cycle-by-cycle current limit, and thermal shutdown with automatic recovery. The buck converters operate 180 out-of-phase from each other to minimize input current ripple Applications Camera ModuleSurround, Rear, Front Point of Load 19-100341 Rev 11 6/21MAX20049 Flexible, Compact Quad Power Supply with 2.2MHz, 500mA Buck Converters and Dual LDOs for Automotive Camera Modules Simplified Block Diagram BIAS OUT1 LDOIN3 MAX20049 BIAS 4.7F 1F LDO3 AGND 17VIN MAX, 3.3V, 3.0V, BST1 2.8V OUTS3 2.9V, 2.8V, EN 2.7V 150mA, 4.7F pMOS SUP1 VSUP OUTS2 LDO4 STEP-DOWN 3.3H 3.1V 1V TO 2V, PWM LX1 OUT1 100mV BUCK1 22F STEP, 1.2V OUTS4 400mA 3.8V, 3.3V, 3.1V, EN nMOS PGND1 2.9V, 2.8V, 2.2F 0.9V TO 2V, UP TO GNDL 1.2A OUTS1 EN BIAS BST2 SUP2 VSUP VBIAS STEP-DOWN 10k 3.3H PWM 1.8V PGOOD LX2 BUCK2 OUT2 OUT1, OUT2, 22F 3.8V, 3.3V, 3.1V, LDO3, LDO4 2.9V, 2.8V, COMPARATOR PGND2 0.9V TO 2V, UP TO 1.2A OUTS2 EN EP www.maximintegrated.com Maxim Integrated 2