Vin

EN

Vout

Iout

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Operation

•

Connect a 0-A to 100-mA load between an OUT pin at connector J4, and a GND pin at connector J3.

•

Disable the output by connecting the jumper on JP1 from the EN pin to the OFF pin.

3

Operation

•

Turn on the input power supply. For initial operation, set the input power supply, VIN

– J1, to 10 V

•

Enable the output by reconnecting the jumper on JP1 from the EN pin to the ON pin.

•

Vary the respective loads and VIN voltages as necessary for test purposes.

4

Test Results

This section provides typical performance waveforms for the TPS7A1601EVM-046 printed-circuit board.

4.1

Turnon Sequence

Figure 1 shows the turnon/off characteristic where VIN is preset to 10 V, the output drives full load, and

the EN turnon is stepped to 10 V (C2, red). The output soft start (C1, yellow) shows a monotonic rise time

of approximately 60 ms. The output voltage start-up ramp is not load dependant.

Figure 1. Turnon Sequence

4.2

Output Load Transient

Figure 2 shows the load transient response (OUT

– C1, yellow) for a full-load step transient from 10 mA to

100 mA (C4, green). VIN is set at 10 V.

3

SLVU549

– December 2011

TPS7A1601EVM-046

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© 2011, Texas Instruments Incorporated