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TPS715A01DRBR Datasheet(PDF) 10 Page - Texas Instruments |
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TPS715A01DRBR Datasheet(HTML) 10 Page - Texas Instruments |
10 / 26 page TPS715A33 IN OUT V IN V OUT C1 0.1 mF 0.47 mF GND 10 TPS715A SBVS047H – MAY 2004 – REVISED MARCH 2016 www.ti.com Product Folder Links: TPS715A Submit Documentation Feedback Copyright © 2004–2016, Texas Instruments Incorporated 8 Application and Implementation NOTE Information in the following applications sections is not part of the TI component specification, and TI does not warrant its accuracy or completeness. TI’s customers are responsible for determining suitability of components for their purposes. Customers should validate and test their design implementation to confirm system functionality. 8.1 Application Information The TPS715A family of LDO regulators is optimized for ultralow-power applications such as the MSP430 microcontroller. The ultralow-supply current of the TPS715A device maximizes efficiency at light loads, and its high input voltage range makes the device suitable for supplies such as unconditioned solar panels. 8.2 Typical Applications 8.2.1 Typical Application (Fixed-Voltage Version) Figure 16. Typical Application Circuit (Fixed-Voltage Version) 8.2.1.1 Design Requirements 8.2.1.1.1 Power the MSP430 Microcontroller Several versions of the TPS715A are ideal for powering the MSP430 microcontroller. Table 2 shows potential applications of some voltage versions. Table 2. Typical MSP430 Applications DEVICE VOUT (TYP) APPLICATION TPS715A19 1.9 V VOUT(min) > 1.8 V required by many MSP430s. Allows lowest power consumption operation. TPS715A23 2.3 V VOUT(min) > 2.2 V required by some MSP430s flash operation. TPS715A30 3 V VOUT(min) > 2.7 V required by some MSP430s flash operation. TPS715A345 3.45 V VOUT(max) < 3.6 V required by some MSP430s. Allows highest speed operation. The TPS715A family of devices offers many output voltage versions to allow the supply voltage to be optimized for the MSP430, thereby minimizing the supply current consumed by the MSP430. 8.2.1.2 Detailed Design Procedure 8.2.1.2.1 External Capacitor Requirements Although not required, a 0.047- μF or larger input bypass capacitor, connected between IN and GND and located close to the device, is recommended to improve transient response and noise rejection of the power supply as a whole. A higher-value input capacitor may be necessary if large, fast-rise-time load transients are anticipated and the device is located several inches from the power source. The TPS715A device requires an output capacitor connected between OUT and GND to stabilize the internal control loop. Any capacitor (including ceramic and tantalum) greater than or equal to 0.47 μF properly stabilizes this loop. The X7R- or X5R-type capacitors are recommended because these capacitors have a wider temperature specification and lower temperature coefficient, but other types of capacitors can be used. |
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