19-6287 Rev 0 4/12 MAX16910C9 Evaluation Kit Evaluates: MAX16910C General Description Features The MAX16910C9 evaluation kit (EV kit) is a fully assem- S 3.5V to 30V Input Voltage Range bled and tested PCB for evaluating the MAX16910C low- S Configurable for 3.3V or 5V Output Voltage dropout (LDO) linear regulator. The EV kit circuit can be S Resistor PCB Pads for Adjusting the Output configured as either a fixed output voltage (3.3V or 5V) Voltage (1.5V to 11V) or an adjustable output voltage. The EV kit provides up S Provides Up to 200mA Output Current 200mA current at the circuit output. The EV kit operates from a 3.5V to 30V supply. S Low-Dropout Voltage of 280mV at 200mA The EV kit comes with the MAX16910CASA9 92.5% S RESET Power-Good Output output-voltage reset-threshold IC installed. The EV kit S Proven PCB Layout can also evaluate the MAX16910CASA8 IC, which has an S Fully Assembled and Tested 87% output voltage reset threshold. Ordering Information appears at end of data sheet. Component List DESIGNATION QTY DESCRIPTION DESIGNATION QTY DESCRIPTION Not installed, electrolytic JU1, JU2, JU3 3 3-pin headers C1 0 capacitor R1, R2 0 Not installed, resistors (0805) 1FF Q10%, 50V X7R ceramic R3 1 10kI Q5% resistor (0603) C2 1 capacitor (0805) 200mA automotive linear TDK C2012X7R1H105K U1 1 regulator (8 SO-EP*) 4.7FF Q10%, 25V X7R ceramic Maxim MAX16910CASA9/V+ C3 1 capacitor (0805) 3 Shunts TDK C2012X7R1E475K PCB: MAX16910C9 1 1000pF 10%, 50V X7R ceramic EVALUATION KIT C4 1 capacitor (0603) *EP = Exposed pad. TDK C1608X7R1H102k Component Supplier SUPPLIER PHONE WEBSITE TDK Corp. 847-699-2299 www.component.tdk.com Note: Indicate that you are using the MAX16910C9 when contacting this component supplier. Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com.MAX16910C9 Evaluation Kit Evaluates: MAX16910C In fixed output-voltage mode, the output voltage is set Quick Start to 3.3V or 5V using jumper JU3. To configure the EV kit circuit for fixed output mode, install a shunt across pins Required Equipment 2-3 on jumper JU2. Place a shunt across pins 1-2 on JU3 MAX16910C9 EV kit for the 5V preset output. Place a shunt across pins 2-3 for 3.5V to 30V, 300mA power supply the 3.3V preset output. Electronic load capable of sinking 200mA In adjustable output-voltage mode, the output voltage is set using a resistor-divider network from the OUT Digital multimeter (DMM) to SETOV pins. To configure the circuit for adjustable output-voltage mode, install a shunt across pins 1-2 on Procedure jumper JU2 and remove the shunt at jumper JU3. The The EV kit is fully assembled and tested. Follow the steps output voltage can be set between 1.5V to 11V using below to verify board operation: surface-mount 0805 resistor PCB pads R1 and R2. 1) Verify that shunts are installed across jumpers JU1 To set the output voltage, select resistor R2 to be less (1-2), JU2 (2-3), and JU3 (1-2). than or equal to 100kI and use the following equation 2) Set the power supply to 14V and disable the output. to compute R1: 3) Connect the positive input of the DMM to the OUT PCB pad on the EV kit, and the negative input of the V OUT R1=R21 ( ) DMM to the GND PCB pad on the EV kit to measure V SETOV the output voltage. 4) Connect the 200mA load between the OUT and GND where V is the desired output voltage, V is OUT SETOV PCB pads on the EV kit. 1.25V, and R1 is in kI. 5) Enable the power-supply output. See Table 2 for proper jumper configurations when operating the EV kit circuit in fixed or adjustable output- 6) Verify that the output voltage is 5V. voltage mode. Detailed Description of Hardware RESET Output The IC has an open-drain RESET output that goes high The MAX16910C9 EV kit is a fully assembled and tested impedance after the output rises 92.5% (typ) above its PCB for evaluating the MAX16910CASA9 200mA LDO regulated output. Pullup resistor R3 pulls the RESET PCB regulator. The EV kit operates from 3.5V to 30V and pad up to the OUT voltage. requires 300mA current. The LDO regulator has a fixed 3.3V or 5V output, but can Table 1. Enable Control (JU1) be configured between 1.5V and 11V. An open-drain RESET output changes from low to high whenever the SHUNT ENABLE PIN OUTPUT OUT voltage rises to 92.5% of its regulated output. When POSITION OUT exceeds its rising threshold voltage, RESET remains 1- 2 Connected to IN Enabled low for the 1.25ms reset timeout period programmed by 2-3 Connected to GND Disabled capacitor C4, and then goes high. A RESET PCB pad is available for monitoring the output. Table 2. Output-Voltage Configurations Enable (JU1) (JU2, JU3) Jumper JU1 configures the EV kits output for turn-on/ off control. Install a shunt across pins 1-2 to enable the SHUNT POSITION OUTPUT VOLTAGE circuit output. Install a shunt across pins 2-3 to disable JU2 JU3 the output. The output can also be externally controlled Set by external feedback by placing an independent voltage source at the ENABLE 1 -2 Not installed resistors R1 and R2 PCB pad when a shunt is not installed at JU1. See Table 1 1-2 5V for proper JU1 configuration. 2 -3 2-3 3.3V Output-Voltage Selection Jumpers JU2 and JU3 configure the EV kit circuit to oper- ate in fixed output-voltage or adjustable output-voltage mode. Maxim Integrated Products 2