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| AATIAN22 Datasheet, PDF (6/11 Pages) SiGe Semiconductor, Inc. – 3MHz Fast Transient 400mA Step-Down Converter | |||
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EV-139
AAT1149 EVAL: 3MHz Fast Transient
400mA Step-Down Converter
Test: Quiescent Current vs. Input Voltage
1. Configure the specified test equipment as shown in Figure 5.
2. Enable UUT by connecting the jumper to the âONâ position.
3. Remove the output loads (open circuit).
4. Replace the input power supply by Keithley 2400 3A source meter or equivalent. Set VSRC to the designed
input voltage (VSRC = VOUT + 1V), and set the ICOM to 200µA.
5. Turn on the Keithley and read the compliance current (quiescent current).
6. Vary the input voltage VSRC = VOUT + 1V while monitoring the corresponding compliance current.
Figure 5: AAT1149 Evaluation Board Connection Diagram for Quiescent Current.
6
EV-139.2007.08.1.0
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