AATIAN76 Datasheet, PDF (4/8 Pages) SiGe Semiconductor, Inc. – Dual Slew Rate Controlled Load Switch

EV-140
AAT4282A EVAL:
Dual Slew Rate Controlled Load Switch
Test: Slew Rate Controlled Turn On Response
1. Configure the specified test equipment as shown in Figure 3
2. Enable channel A and B by a PWM Function Generator (Note: using the jumper to connect ENA or ENB
to INA or INB will force the outputs follow the inputs). Connect the FAST pin to INA or INB for FAST turn-
on slew rate, and connect it to GND using for SLOW turn-on slew rate.
A. INA and INB in parallel:
1. Use JP1 jumper to connect inputs A and B together, set input voltage to 3.6V (use only one power supply)
and output current loads to 1A for each output.
2. Toggle the FAST pin between VIN and GND while observing the FAST and SLOW turn-on and turn-off slew
rate from the outputs on the oscilloscope.
3. Repeat steps 1 and 2 for different output current loads and input voltages.
B. INA and INB independently:
1. Remove JP1 to separate INA and INB, set INA to 3.0V and INB to 4.2V, set output current loads to 1A for
each output.
2. Toggle the FAST pin between VIN and GND while observing the FAST and SLOW turn-on and turn-off slew
rate from the output on the oscilloscope.
3. Repeat steps 1 and 2 for different output current loads and input voltages.
Figure 3: AAT4282A Evaluation Board Connection Diagram for Slew Rate Test.
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EV-140.2007.08.1.0