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TPS5140PAGR Datasheet(PDF) 8 Page - Texas Instruments |
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TPS5140PAGR Datasheet(HTML) 8 Page - Texas Instruments |
8 / 59 page TPS5140 FOUR-CHANNEL DC/DC CONTROLLER FOR NOTEBOOK PC POWER SLVS305A – DECEMBER 2000 – REVISED JANUARY 2001 8 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 Terminal Functions(Continued) TERMINAL I/O DESCRIPTION NAME NO. I/O DESCRIPTION REG5V_IN 42 I External 5 V input SCP 17 I/O Short circuit protection terminal. An external capacitor is connected between SCP and GND to set the SCP enable time up. SOFTSTART1 2 I/O External capacitor from SOFTSTART1 to GND for CH1 soft starts control. SOFTSTART2 6 I/O External capacitor from SOFTSTART2 to GND for CH2 soft starts control. SOFTSTART3 24 I/O External capacitor from SOFTSTART3 to GND for CH3 soft starts control. SOFTSTART_12V 22 I/O External capacitor from SOFTSTART_12V to GND for CH4 (12-V boost converter) soft starts control. STBY1 13 I Stand by control for CH1 STBY2 14 I Stand by control for CH2 STBY3 16 I Stand by control for CH3 STBY12V 15 I Stand by control for 12-V boost converter STBY_VREF3.3 11 I Stand by control for 3.3-V linear regulator STBY_VREF5 12 I Stand by control for 5-V linear regulator TRIP1 55 I External resistor connection for CH1 output current protection control TRIP2 53 I External resistor connection for CH2 output current protection control TRIP3 34 I External resistor connection for CH3 output current protection control VCC 46 Supply voltage input VCC_SENSE12 54 I Supply voltage input and input voltage terminal for CH1/2 output current sense VCC_SENSE3 35 I Supply voltage input and input voltage terminal for CH3 output current sense VREF3.3 44 O 3.3-V linear regulator output VREF5 43 O 5-V linear regulator output detailed description REF (1.185 V) The reference voltage is used for setting the output voltage and voltage protection. This reference voltage is dropped down from the 5-V regulator. The tolerance is 1.5 % over the entire temperature range. CH1, 2, 3 (synchronous buck controller) The TPS5140 includes three synchronous buck controllers. CH2 and CH3 (5 V and 2.5 V) are operated in phase, but CH1 (3.3 V) is operated 180 ° out of phase from CH2 and CH3, but at the same frequency. All channels have separate standby and softstart control. 12-V boost converter OUT_12V is a 12-V boost converter output . It can isolate VI (5 V) and VO fully. 5-V regulator An internal linear voltage regulator is used for the high-side driver bootstrap voltage and as the source of Vref. When the 5-V regulator is disconnected from the MOSFET drivers, it is used only for the source of Vref. Since the input voltage is from 4.5 V to 28 V, this feature offers a fixed bootstrap voltage to simplify the drive design. The 5-V regulator is also used for powering the low side driver. The 5-V regulator is active if STBY_VREF5 is high and has a tolerance of 4%. |
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