AATIAN22 Datasheet, PDF (4/11 Pages) SiGe Semiconductor, Inc. – 3MHz Fast Transient 400mA Step-Down Converter

EV-139
AAT1149 EVAL: 3MHz Fast Transient
400mA Step-Down Converter
Test: Line Transient Response
1. Configure the specified test equipment as shown in Figure 3.
2. Enable UUT by connecting the jumper to the ‘ON’ position.
3. Use Line Transient Response Board to generate the input voltage step by setting the first power supply to
3.6V and the second one to 4.2V.
4. Toggle the input voltage from 3.6V to 4.2V by setting the magnitude of the PWM to 5Vpp at 5MHz while
monitoring the AC input voltage and the AC output voltage on the oscilloscope.
5. Repeat step 4 for different input voltage steps and over the range of V_OUT.
Vin(AC)
Vout(AC)
Figure 3: AAT1149 Evaluation Board Connection Diagram for Line Transient Response.
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EV-139.2007.08.1.0