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TPS54355-EP Datasheet(PDF) 11 Page - Texas Instruments

Part # TPS54355-EP
Description  4.5-V TO 20-V INPUT, 3-A OUTPUT SYNCHRONOUS PWM SWITCHES
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

TPS54355-EP Datasheet(HTML) 11 Page - Texas Instruments

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VI(SYNC)
VO(PH)
Internal Oscillator
VO(PH)
VO(SYNC)
Power Good (PWRGD)
TPS54352-EP
,, TPS54353-EP,, TPS54354-EP
TPS54355-EP
, TPS54356-EP, TPS54357-EP
www.ti.com ....................................................................................................................................................... SLVS684A – JANUARY 2007 – REVISED JULY 2009
Figure 3. SYNC Input Waveform
Figure 4. SYNC Output Waveform
The VSENSE pin is compared to an internal reference signal if the VSENSE is greater than 97% and no other
faults are present. The PWRGD pin presents a high impedance. A low on PWRGD indicates a fault. PWRGD
has been designed to provide a weak pulldown and indicates a fault even when the device is unpowered. If the
TPS5435x has power and has any fault flag set, the TPS5435x indicates the power is not good by driving the
PWRGD pin low. The following events, singly or in combination, indicate power is not good:
• VSENSE pin out of bounds
• Overcurrent
• Thermal shutdown
• UVLO undervoltage
• Input voltage not present (weak pulldown)
• Slow starting
• VBIAS voltage is low.
Copyright © 2007–2009, Texas Instruments Incorporated
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Product Folder Link(s): TPS54352-EP TPS54353-EP TPS54354-EP TPS54355-EP TPS54356-EP TPS54357-EP


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