Page 2 - Design Problem; Solution
SLVA082 2 Powering the TMS320VC5402 Using the TPS60100, TPS76918, and the TPS3305-18 Design Problem The TMS430VC5402 is ideally suited for today’s portable applications powered by two alkalineor NiMH batteries. What high efficient, low-cost, compact power management solution producesa 1.8 V DSP core...
Page 3 - Design Schematic; % output voltage from the
SLVA082 3 Powering the TMS320VC5402 Using the TPS60100, TPS76918, and the TPS3305-18 Design Schematic VOUTVOUT FB VINVINSKIP C1+ C1- C2+ C2- COM 3V8 ENABLE PGND PGND SYNC GND PGND GND TPS60100 2.2 µ F 2.2 µ F + - PGND 10 µ F 0.1 µ F 22 µ F 0.1 µ F VOUT NC/FB VINEN TPS76918 GND VDD MR Sense1 Sense2 T...
Page 4 - Capacitor Selection; is recommended that the input; Table 3. Recommended Output and Input Capacitors
SLVA082 4 Powering the TMS320VC5402 Using the TPS60100, TPS76918, and the TPS3305-18 Capacitor Selection The TPS60100 requires only four external capacitors. Their values are closely linked to theoutput current capacity, output noise requirements, and mode of operation. Generally, thetransfer capaci...
Page 5 - Table 4. Recommended Capacitor Manufacturers; Power Dissipation; DISS; External Capacitor Requirements
SLVA082 5 Powering the TMS320VC5402 Using the TPS60100, TPS76918, and the TPS3305-18 Table 4 lists the manufacturers of recommended capacitors. In most applications, surface-mounttantalum capacitors will be the right choice. However, ceramic capacitors will provide the lowestoutput-voltage ripple du...
Page 6 - Table 5. External Capacitor Selection; Power Dissipation and Junction Temperature; qJA; Regulator Protection
SLVA082 6 Powering the TMS320VC5402 Using the TPS60100, TPS76918, and the TPS3305-18 Table 5. External Capacitor Selection PART NUMBER MANUFACTURER VALUE MAX ESR† SIZE (H × L × W)† T494B475K016AS KEMET 4.7 µ F 1.5 Ω 1.9 × 3.5 × 2.8 195D106x0016x2T SPRAGUE 10 µ F 1.5 Ω 1.3 × 7.0 × 2.7 695D106x003562T...
Page 7 - . An internal timer delays the return; d typ; voltage V; IT–; . This event also reinitializes; References
SLVA082 7 Powering the TMS320VC5402 Using the TPS60100, TPS76918, and the TPS3305-18 During power-on, RESET is asserted when the supply voltage becomes higher than 1.1 V.Thereafter, the supply-voltage supervisor monitors the SENSE inputs and keeps RESET activeas long as SENSE remains below the thres...
Page 8 - IMPORTANT NOTICE
IMPORTANT NOTICE Texas Instruments and its subsidiaries (TI) reserve the right to make changes to their products or to discontinueany product or service without notice, and advise customers to obtain the latest version of relevant informationto verify, before placing orders, that information being r...