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TPS54900 Datasheet(PDF) 4 Page - Texas Instruments |
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TPS54900 Datasheet(HTML) 4 Page - Texas Instruments |
4 / 16 page TPS54900 SLVS405 – OCTOBER 2001 4 www.ti.com Terminal Functions TERMINAL PIN DESCRIPTION FUNCTIONAL DESCRIPTION NAME NO. PIN DESCRIPTION FUNCTIONAL DESCRIPTION LX0 1 Channel 0 switch output Output to inductor and catch diode LX1 2 Channel 1 switch output Output to inductor and catch diode GND 3 Ground Power and Analog Ground SFS 4 Frame sync input Read/write frame start strobe SDI 5 Serial data in 8 bit address/16–bit data word command input EN 6 Enable EN < VIL: Disable all channels, EN > VIH: Enable activates outputs (see text) FB0 7 Channel 0 feedback input FB1 8 Channel 1 feedback input Feedback from L C filter output FB2 9 Channel 2 feedback input Feedback from L–C filter output FB3 10 Channel 3 feedback input CBS 11 Channel bank select Assigns internal channels to respond to serial address bit ADR2 = 0 when CBS < VIL, or to ADR2 = 1 when CBS > VIH SCLK 12 Serial clock input Serial clock/synchronization signal SDO 13 Serial data out Status data output signal, open drain VIN 14 Input supply voltage Chip supply and channel 0–3 switch input LX2 15 Channel 2 switch output Output to inductor and catch diode LX3 16 Channel 3 switch output Output to inductor and catch diode functional block diagram UVLO Bias Oscillator, Clock & Ramp Generator Bandgap Reference Serial Command Interface Output Status VIN GND EN CBS SFS SCLK SDI SDO PWM Ramp DACV0 DACV1 DACV2 DACV3 FB3 FB2 FB1 FB0 LX3 LX2 LX0 LX1 Reset Thermal Shutdown Shutdown PWM Control DACs Programming Registers ST ILIM ILIM ILIM ILIM |
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