Texas Instruments Evaluation Module for Dual, 200 mA Output, Low Noise, High PSRR, Low-Dropout Regulator TLV7101828EVM-5 TLV7101828EVM-595 Datenbogen
Produktcode
TLV7101828EVM-595
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Test Results
to VIN.
•
Vary the respective loads and VIN voltages as necessary for test purposes.
4
Test Results
This section provides typical performance waveforms for the TLV7101828EVM-595 printed-circuit board.
4.1
Turnon Sequence
shows the turnon sequence for the case where the enable is connected to the VIN voltage. The
VIN turnon voltage rises to 4 V followed by an approximate 50-µs delay preceding the simultaneous ramp
up of the two output voltages. These two output voltages are completely independent, and the ramp rates
are set by design. The output voltage startup ramp is not load dependant.
up of the two output voltages. These two output voltages are completely independent, and the ramp rates
are set by design. The output voltage startup ramp is not load dependant.
Figure 1. Turnon Sequence: Ch 3 VIN – Turnon to 4 V, Ch2 OUT 2 – 2.8-V Turnon Ramp, Ch1 OUT 1 –
1.8-V Turnon Ramp
4.2
OUT 1 Load Transient
shows the load transient response – oscilloscope channel 1 – for a 90-mA to 180-mA load
transient applied to OUT 1 (1.8-V output). Oscilloscope channel 2 shows the crosstalk coupling from the
LDO OUT 1 channel into OUT 2, where OUT 2 is loaded with 200 mAdc. Oscilloscope channel 4 shows
the approximate load current transient.
LDO OUT 1 channel into OUT 2, where OUT 2 is loaded with 200 mAdc. Oscilloscope channel 4 shows
the approximate load current transient.
3
SLVU404 – September 2010
TLV7101828EVM-595
Copyright © 2010, Texas Instruments Incorporated