Texas Instruments HPA070 manual EVM Assembly Drawing and PCB Layout

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SLUU186 − March 2004

6.3Output Ripple and Transient Response

Figure 6 shows the typical output voltage ripple with IOUT=15 A to be less than 20 mVpp.

The transient response is shown in Figure 7 as the load is stepped from 5 A to 15 A. The voltage deviation is less than 60 mV.

OUTPUT VOLTAGE RIPPLE	TRANSIENT RESPONSE
IOUT = 15 A	VOUT = 50 mV/div

VRIPPLE (10 mV/div)

	IOUT 5 A/div
t − Time − 1 ∝s/div	t − Time − 200 ∝s/div
Figure 6	Figure 7

7 EVM Assembly Drawing and PCB Layout

Figure 8. Top Side Component Assembly

12TPS40055-Based Design Converts 12-V Bus to 1.8 V at 15 A (HPA070)

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Contents User’s Guide EVM Important Notice Dynamic Warnings and Restrictions Features IntroductionSchematic TPS40055EVM−001 HPA070 SchematicComponent Selection TPS40055 Device SelectionFrequency of Operation + R2 + f 17.82 10 *6 * 23 kUvlo Circuitry Inductance ValueInput capacitor selection Output Capacitor Selection Mosfet selectionShort Circuit Protection Snubber Component SelectionCompensation Components Test Setup DC Input SourceOutput Load Oscilloscope Probe Test JacksEfficiency and Power Loss Power Dissipation LoadTest Results / Performance Data Closed Loop PerformanceEVM Assembly Drawing and PCB Layout Output Ripple and Transient ResponseOutput Voltage Ripple Transient Response Top Side Copper Internal Layer 2 Copper List of Materials TPS40055EVM−001 HP A070 List of MaterialsReferences Important Notice Products Applications