SLUUAS2C October 2013 – November 2021 TPS53915
5.1 Test Equipment
- OscilloscopeA digital or analog oscilloscope measures the output ripple. The oscilloscope must be set for
the following:
- 1-MΩ impedance
- 20-MHz bandwidth
- AC coupling
- 1-μs / division horizontal resolution
- 20-mV / division vertical resolution
- Voltage SourceThe input voltage source VIN must be a 0 to 14-V variable-DC source capable of supplying 10 ADC. Connect VIN to J1 as shown in Figure 5-2.
- MultimetersV1: VIN at TP1 (VIN) and TP4 (GND).
V2: VOUT at TP7 (VOUT) and TP9 (GND).
- Output LoadThe output load must an electronic constant-resistance-mode load capable of 0 to 15 ADC at 1.2 V.
Figure 5-1 Tip and Barrel
Measurement for VOUT RippleRecommended Wire Gauge:
- VIN to J1 (12-V input)
- The recommended wire size is 1× AWG number 14 per input connection, with the total length of wire less than four feet (2 feet input, 2 feet return).
- J3 to LOAD
- The minimum recommended wire size is 2× AWG number 14, with the total length of wire less than four feet (two feet output, two feet return).