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TPS61000 Datasheet(PDF) 15 Page - Texas Instruments |
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TPS61000 Datasheet(HTML) 15 Page - Texas Instruments |
15 / 25 page ![]() O O FB V V 5 5 ± N ± V 500 mV § · § · u : u ¨ ¸ ¨ ¸ © ¹ © ¹ VBAT VOUT LBO 5 10 3 R5 R3 R4 6 TPS61007 LBI 9 FB COMP 2 CC1 100 pF CC2 33 nF RC 10 k EN R2 R1 1 GND SW 7 4 Ci 10 µF 10 V CO 22 µF 10 V Low Battery Warning L1 33 µH D1 FBGND 8 VO Alkaline Cell TPS61000, TPS61001, TPS61002, TPS61003 TPS61004, TPS61005, TPS61006, TPS61007 www.ti.com SLVS279D – MARCH 2000 – REVISED AUGUST 2015 10.2 Typical Application Figure 17. Typical Application Circuit for Adjustable Output Voltage Option 10.2.1 Design Requirements See Table 2 for design parameters. Table 2. TPS6100x Output Design Parameters DESIGN PARAMETERS VALUES Input voltage range 1.8 V to 3.3 V Output voltage 3.3 V Output voltage ripple ±3% VOUT 10.2.2 Detailed Design Procedure 10.2.2.1 Programming the TPS61000 and TPS61007 Adjustable Output Voltage Devices The output voltage of the TPS61000 and TPS61007 can be adjusted with an external resistor divider. The typical value of the voltage on the FB pin is 500 mV in fixed-frequency operation and 485 mV in the power-save operation mode. The maximum allowed value for the output voltage is 3.3 V. The current through the resistive divider should be about 100 times greater than the current into the FB pin. The typical current into the FB pin is 0.01 µA, and the voltage across R4 is typically 500 mV. Based on those two values, the recommended value for R4 is in the range of 500 k Ω in order to set the divider current at 1 µA. From that, the value of resistor R3, depending on the needed output voltage VOUT, can be calculated using the following equation: (1) If, as an example, an output voltage of 2.5 V is needed, a 2-M Ω resistor should be chosen for R3. The TPS61007 is an improved version of the TPS61000 adjustable output voltage device. The FBGND pin is internally connected to GND. Copyright © 2000–2015, Texas Instruments Incorporated Submit Documentation Feedback 15 Product Folder Links: TPS61000 TPS61001 TPS61002 TPS61003 TPS61004 TPS61005 TPS61006 TPS61007 |
Similar Part No. - TPS61000_15 |
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