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PTV05010W Datasheet(PDF) 8 Page - Texas Instruments |
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PTV05010W Datasheet(HTML) 8 Page - Texas Instruments |
8 / 19 page www.ti.com Adjusting the Output Voltage R = 10 k x SET W 0.8 V V - 0.8 V O = 2.49 kW (1) PTV05010W SLTS242 – FEBRUARY 2005 APPLICATION INFORMATION (continued) Table 1. Input/Output Capacitors (continued) Capacitor Characteristics Quantity Max ESR Max Ripple Capacitor Vendor, Vendor Working Optional Value at 100 Current at Physical Size Input Type/Series (Style) Part Number Voltage Output (µF) kHz 85 °C (Irms) (mm) Bus (V) Bus ( Ω) (mA) Murata, Ceramic X5R 6.3 100 0.002 — 3225 ≥1(2) ≤ 3 GRM32ER60J107M (SMD) 6.3 47 ≥1(2) ≤ 5 GRM32ER60J476M 16 22 ≥1 (2) ≤ 5 GRM32ER61C226K 16 10 ≥1 (2) ≤ 5 GRM32DR61C106K TDK, Ceramic X5R 6.3 100 0.002 — 3225 ≥1(2) ≤ 3 C3225X5R0J107MT (SMD) 6.3 47 ≥1 (2) ≤ 5 C3225X5R0J476MT 16 22 ≥1 (2) ≤ 5 C3225X5R1C226MT 16 10 ≥1 (2) ≤ 5 C3225X5R1C106MT The VO Adjust control (pin 4) sets the output voltage of the PTV05010W product to a value over the range, 0.8 V to 3.6 V. The adjustment method requires the addition of a single external resistor, RSET, that must be connected directly between the VO Adjust and the regulator's output GND (pin 1 is recommended). Without an adjust resistor, the output voltage is set to its lowest value. Table 2 gives the preferred value of the external resistor for a number of standard voltages, along with the actual output voltage that this resistance value provides. Figure 6 shows the placement of the required resistor. Table 2. Nearest Standard Values of RSET for Common Output Voltages VO RSET VO (Required) (Standard Value) (Actual) 3.3 V 698 Ω 3.309 V 2.5 V 2.21 k Ω 2.502 V 2 V 4.12 k Ω 2.010 V 1.8 V 5.49 k Ω 1.803 V 1.5 V 8.87 k Ω 1.504 V 1.2 V 17.4 k Ω 1.202 V 1 V 36.5 k Ω 1.005 V 0.8 V Open 0.800 V For other output voltages, the value of the required resistor can either be calculated or simply selected from the range of values given in Table 3. Equation 1 may be used for calculating the adjust resistor value. 8 |
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