Test Procedure for the NCV8664 Evaluation Board 5.16.2007 Table of required equipment: Measurement equipment description Resistive Load Multimeters NCV8664 Demo Board DC Power Supply Concrete example Agilent 6060B Keithley 2000 Agilent 6812B Please follow these steps during the first start of the NCV8664 evaluation board: Quantity 1 2 1 1 Dropout Voltage Verification Steps 1. Connect circuit as shown in Figure 1. 2. Set Vin= 13.5 V, Record Vout. 3. Reduce Vin until Vout has dropped by 100mV. 4. Subtract Vout from Vin. Resulting Voltage is Dropout Voltage. NCV8664 Dropout vs. Output Current 0.4 0.35 NCV8664 Demo Board DC Power Supply I Vin NCV8664 Cin Vout Dropout Voltage (V) 0.3 O Cout GND + DC Voltmeter Load + - DC Voltmeter 0.25 0.2 0.15 0.1 0.05 0 0 G Figure 1- Dropout Voltage Test Setup 50 100 150 Output Current (m A) 200 Quiescent Current Verification Steps 1. Connect circuit as shown in Figure 3. 2. Set Vin= 13.5 V. 3. Subtract Output Current from Input Current. Current Consum ption vs. Output Current 10 9 Current Consumption (mA) 8 7 6 5 4 3 2 1 Vin = 13.5 V 0 0 50 100 150 Output Current (m A) Figure 3. Quiescent Current Verification Setup 200 Output Voltage Verification Steps 1. Connect circuit as shown in Figure 4. 2. Set output load to 100 Ohms, Set Vin= 0 V, Record Vout. 3. Increase Vin, measure Vout. Input Voltage vs. Output Voltage 6 NCV8664 Demo Board I Vin NCV8664 Cin Vout 5 O Cout GND + DC Voltmeter Load + - DC Voltmeter Output Voltage (V) DC Power Supply 4 3 2 1 G RL= 100 Ohms 0 0 10 20 30 Input Voltage (V) Figure 4. Quiescent Current Verification Setup 40