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TPS715A01DRBT-

更新时间： 2024-09-23 08:38:35

品牌	Logo	应用领域
德州仪器 - TI		稳压器输入元件
页数	文件大小	规格书
20页	818K
描述
HIGH INPUT VOLTAGE, MICROPOWER SON PACKAGED, 80mA LDO LINEAR REGULATORS

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数据手册

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TPS715A01DRBT- 数据手册

TPS715Axx

SBVS047E –MAY 2004–REVISED JUNE 2011

www.ti.com

Programming the TPS715A01 Adjustable LDO Regulator

The output voltage of the TPS715A01 adjustable regulator is programmed using an external resistor divider as

shown in Figure 15. The output voltage is calculated using Equation 3:

ǒ_{1 )}Ǔ

+ V

REF

OUT

(3)

where:

V_REF= 1.205V typ (the internal reference voltage)

Resistors R1 and R2 should be chosen for approximately 1.5μA divider current. Lower value resistors can be

used for improved noise performance, but the solution consumes more power. Higher resistor values should be

avoided as leakage current into/out of FB across R1/R2 creates an offset voltage that artificially

increases/decreases the feedback voltage and thus erroneously decreases/increases V_O. The recommended

design procedure is to choose R2 = 1MΩ to set the divider current at 1.5μA, and then calculate R1 using

Equation 4:

OUT

_{R1 +}ǒ Ǔ

* 1 R2

REF

(4)

TPS715A01

OUTPUT VOLTAGE

PROGRAMMING GUIDE

0.1 µF

OUTPUT

VOLTAGE

OUT

806 kΩ

392 MΩ

1.07 MΩ

2.55 MΩ

1.8 V

2.8 V

5.0 V

0.47 µF

GND

Figure 15. TPS715A01 Adjustable LDO Regulator Programming

1...5 6 789 10 11...20

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