Texas Instruments 2.25A Inverting Buck Boost Regulator Evaluation Module TPS5430EVM-342 TPS5430EVM-342 데이터 시트
제품 코드
TPS5430EVM-342
2.7
Powering Up
Test Setup and Results
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Figure 5. Measured Output Voltage Ripple, TPS5430
provides the TPS5430EVM-342 start-up waveforms. The top trace shows V
IN
whereas the bottom
trace shows V
OUT
. V
IN
charges up from 0 V toward 12 V. When the input voltage reaches the internally set
UVLO threshold voltage, the slow-start sequence begins. After a delay, the internal reference begins to
ramp up linearly at the internally set slow-start rate towards 1.221 V, and the output ramps up toward the
set voltage of 5 V. The output can be inhibited by using a jumper at JP1 to tie EN to GND. When the
jumper is removed, EN is released and the slow-start voltage begins to ramp up at the internally set rate.
When the EN voltage reaches the enable-threshold voltage of 1.06 V, the start-up sequence begins as
described.
ramp up linearly at the internally set slow-start rate towards 1.221 V, and the output ramps up toward the
set voltage of 5 V. The output can be inhibited by using a jumper at JP1 to tie EN to GND. When the
jumper is removed, EN is released and the slow-start voltage begins to ramp up at the internally set rate.
When the EN voltage reaches the enable-threshold voltage of 1.06 V, the start-up sequence begins as
described.
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TPS5430EVM-342 2.25-A, Inverting Buck-Boost Regulator Evaluation Module
SLVU243 – May 2008