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TPS76201DBVRG4 Datasheet(PDF) 8 Page - Texas Instruments |
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TPS76201DBVRG4 Datasheet(HTML) 8 Page - Texas Instruments |
8 / 16 page TPS76201 LOW OUTPUT ADJUSTABLE ULTRALOW POWER 100mA LDO LINEAR REGULATOR SLVS323B − FEBRUARY 2001 − REVISED JANUARY 2007 8 APPLICATION INFORMATION output voltage programming The output voltage of the TPS76201 adjustable regulator is programmed using an external resistor divider as shown in Figure 18. The output voltage is calculated using: V O + V ref 1 ) R1 R2 (1) Where: Vref = 0.6663 V typ (the internal reference voltage) Resistors R1 and R2 should be chosen for approximately 10- µA divider current. Lower value resistors can be used but offer no inherent advantage and waste more power. Higher values should be avoided as leakage currents at FB increase the output voltage error. The recommended design procedure is to choose R2 = 66.5 k Ω to set the divider current at 10 µA and then calculate R1 using: R1 + V O V ref * 1 R2 (2) VO VI OUT FB R2 GND EN IN ≤0.9 V ≥1.7 V TPS76201 1 µF OUTPUT VOLTAGE (V) R1 R2 0.7 0.9 1.2 1.5 1.8 2.5 3.3 3.6 4 5 3.36 23.2 53.6 83.5 113 182 246 294 332 432 66.5 66.5 66.5 66.5 66.5 66.5 66.5 66.5 66.5 66.5 OUTPUT VOLTAGE PROGRAMMING GUIDE DIVIDER RESISTANCE (k Ω)‡ ‡ 1% values shown. 3 1 4 2 R1 5 ESR = 0.5 Ω 4.7 µF Figure 18. TPS76201 Adjustable LDO Regulator Programming www.ti.com |
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