Click here to ask about the production status of specific part numbers. Evaluates: MAX25210 MAX25210 Evaluation Kit General Description Benefits and Features The MAX25210 ultra-low quiescent current, high-voltage Enables System Designers to Meet Stringent Module linear regulator family is ideal for use in automotive and Requirements for 100A Quiescent Current battery-operated systems. The device operates from a Low 10A Quiescent Current 3.5V to 36V input voltage, delivers up to 300mA of load 300mA Output-Current Capability (300mA, 200mA, current, and consumes only 10A of typical quiescent cur- 100mA, and 50mA Variants) rent at no load. The device consumes only 1.6A current when in shutdown. The input is 40V transient tolerant and User-Selectable Output Voltage (3.3V or 5V Fixed and 0.6V to 11V Adjustable with External Resistive is designed to operate under load-dump conditions. The MAX25210 EV kit can be configured as either fixed output voltage Divider) voltage (3.3V or 5V) or adjustable output voltage using an Tiny Output Capacitors Reduce Board Space and external resistive voltage divider. BOM Cost The MAX25210 features an open-drain, active-low RESET Stable Operation with 2.2F Output Capacitor output with fixed thresholds offered at 93.5% and 87.5% Accurate RESET Output with Adjustable Delay of the output voltage. The RESET output remains low for Eliminates Need for Separate Reset IC a fixed period of 60s after the output voltage exceeds Open-Drain RESET Output with Adjustable Delay its threshold. The RESET delay can be extended with an external capacitor. Fixed-Reset Threshold Options: 87.5% or 93.5% The MAX25210 includes an enable input, short-circuit pro- Operates Through Cold-Crank Conditions tection, and thermal shutdown. The MAX25210 operates Low-Dropout Voltage of 280mV at 200mA over the -40C to +125C automotive temperature range. 3.5V to 36V Wide Input Voltage Range, 40V Load- The regulators are available in a space-saving, thermally Dump Tolerant enhanced, 3mm x 3mm, 8-pin TDFN, 2mm x 2mm, 8-pin Robust Performance in Automotive Environment TDFN, and 5mm x 4mm, 8-pin SO packages. Thermal and Short-Circuit Protection High-Voltage Enable Input (40V Load-Dump Tolerant) Ordering Information appears at end of data sheet. Operating -40C to +125C Temperature Range Automotive Qualified AEC-Q100 319-100539 Rev 0 5/20Evaluates: MAX25210 MAX25210 Evaluation Kit Enable (J1) Quick Start Jumpers J1, J3, and J23 configure the EV kits respective Required Equipment EN inputs for turn-on/off control. Install a shunt across pins MAX25210 EV kit 1-2 to enable the circuit output. Install a shunt across pins 5V to 40V, 300mA DC power supply 2-3 to disable the outputs. The outputs can also be exter- nally controlled by placing an independent voltage source Passive or electronic load capable of sinking 300mA at the ENABLE PCB pad when a shunt is not installed at Digital multimeter (DMM) J1, J3, and J23. See Table 1 for proper configuration. Procedure Output Voltage Selection The EV kit is fully assembled and tested. To verify board Jumpers J2, J33, J4, J18, J24, and J33 configure the EV operation, follow the steps: kit circuit to operate in fixed output-voltage or adjustable 1) Verify that shunts are installed across jumpers. For output-voltage mode. In fixed output-voltage mode, the V TDFN 3X3: J1 (1-2), J2 (2-3), and J13 (DNI). OUT output voltage is set to 3.3V or 5V using jumper J13, J18, For V SO: J3 (1-2), J4 (2-3), and J18 (DNI). For OUT J33. To configure the EV kit circuit for fixed output mode, V TDFN 2X2: J23 (1-2), J24 (2-3), and J33 (DNI). OUT install a shunt across pins 2-3 on jumper J2, J4, J24. Place a shunt across pins 1-2 on J13, J18, J33 for the 5V 2) Set the DC power supply output to 14V and disable preset output. Place a shunt across pins 2-3 for the 3.3V the output. Connect the positive and negative termi- preset output, see Table 2. nals of power supply connections to V and GND IN respectively. In adjustable output-voltage mode, the output voltage is set using a resistor voltage divider network from the 3) Connect the positive input of the DMM to the ap- propriate output pad on the EV kit, and the negative OUTPUT to SETOV pins. To configure the circuit for adjustable output-voltage mode, install a shunt across input of the DMM to the GND PCB pad on the EV kit to measure the output voltage. pins 1-2 on jumper J2, J4, J24 and remove the shunt at jumper J13, J18, J33. The output voltage can be set 4) Connect the passive or electronic load between the between 0.6V to 11V using surface-mount 0402 resistors OUTPUT and GND pads. Set the load from 0mA< R3 and R4, R5 and R6, R10 and R11. To set the output I < 300mA. LOAD voltages, select R4, R6, R11 to be 100k and use the 5) Enable the DC power-supply output. following equation to compute R3, R5, R10: 6) Verify that the output voltage is 5V. Detailed Description of Hardware 3 3 The MAX25210 EV kit is a fully assembled and tested PCB ( ), TDFN 3mm x 3mm 3 = 4 x V for evaluating the MAX25210 300mA LDO regulator. The 2 2 EV kit accommodates TDFN 3mm x 3mm, TDFN 2mm x ( ), TDFN 2mm x 2mm 10 = 11 x V 2mm, and SO 5mm x 4mm package version of the product. The EV kit operates from 3.5V to 36V and requires 300mA 2 2 ( ), SO 5mm x 4mm 5 = 6 x current. The LDO regulator has a fixed 3.3V or 5V output, V however, it can also be configured between 0.6V and 11V using an external resistive feedback divider network. An open-drain RESET output changes from low to high when- where V is the desired output voltage, V is OUT SETOV ever the OUTPUT voltage rises to 93.5% of its regulated 0.6V, and R3, R10, R5 is in k. output. When TIMEOUT is loaded with a 1000pF capacitor See Table 2 for proper jumper configurations when oper- and OUTPUT exceeds its rising threshold voltage, RESET ating the EV kit circuit in fixed or adjustable output voltage remains low for the 1.25ms reset timeout period and then mode. goes high. A dedicated SMB jack (50) is used for each package type to monitor the output and input voltage. Maxim Integrated 2 www.maximintegrated.com