TPS715_15 Datasheet, PDF (10/21 Pages) Texas Instruments – TPS715 50-mA, 24-V, 3.2-μA Supply Current Low-Dropout Linear Regulator in SC70 Package

TPS715
SLVS338R – MAY 2001 – REVISED APRIL 2015
8 Application and Implementation
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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 TPS715 family of LDO regulators has been optimized for ultralow-power applications such as the MSP430
microcontroller. The ultralow-supply current of the TPS715 device maximizes efficiency at light loads, and its high
input voltage range makes it suitable for supplies such as unconditioned solar panels.
8.2 Typical Application
V_IN
C1
0.1 mF
TPS71533
IN
OUT
GND
V_OUT
0.47 mF
Figure 12. Typical Application Circuit (Fixed-Voltage Version)
V_IN
0.1mF
IN
OUT
TPS71501
GND FB
V_OUT
=
V_REF
´
æçè₁
+
R1
R2
ö
÷ø
V_OUT
R₁
C_FB
0.47mF
R₂
OUTPUT VOLTAGE
PROGRAMMING GUIDE
OUTPUT
VOLTAGE
1.8 V
2.8 V
5.0 V
R1
R2
0.499 MW
1.33 MW
3.16 MW
1 MW
1 MW
1 MW
Figure 13. TPS71501 Adjustable LDO Regulator Programming
8.2.1 Design Requirements
8.2.1.1 Power the MSP430 Microcontroller
Several versions of the TPS715 are ideal for powering the MSP430 microcontroller. Table 2 shows potential
applications of some voltage versions.
Table 2. Typical MSP430 Applications
DEVICE
V_OUT (TYP) APPLICATION
TPS71519
1.9 V
V_OUT(min) > 1.8 V required by many MSP430s. Allows lowest power consumption operation.
TPS71523
2.3 V
V_OUT(min) > 2.2 V required by some MSP430s flash operation.
TPS71530
3V
V_OUT(min) > 2.7 V required by some MSP430s Flash operation.
TPS715345
3.45 V
V_OUT(max) < 3.6 V required by some MSP430s. Allows highest speed operation.
The TPS715 family offers many output voltage versions to allow designers to optimize the supply voltage for the
MSP430, thereby minimizing the supply current consumed by the MSP430.
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