TPS76601_13 datasheet(15/24 Pages) TI1 | ULTRALOW QUIESCENT CURRENT 250-mA LOW DROPOUT VOLTAGE REGULATORS

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PROGRAMMING THE TPS76601 ADJUSTABLE LDO REGULATOR

(1)

(2)

TPS76615

,, TPS76618,, TPS76625

TPS76627, TPS76628, TPS76630

TPS76633, TPS76650, TPS76601

www.ti.com................................................................................................................................................. SLVS237C – AUGUST 1999 – REVISED JANUARY 2009

Figure 28. Typical Application Circuit (Fixed Versions)

The output voltage of the TPS76601 adjustable regulator is programmed using an external resistor divider as

shown in Figure 29. The output voltage is calculated using:

Where:

• V

ref = 1.224 V typ (the internal reference voltage)

Resistors R1 and R2 should be chosen for approximately 7-

µA divider current. Lower value resistors can be

used but offer no inherent advantage and waste more power. Higher values should be avoided because leakage

currents at FB increase the output voltage error. The recommended design procedure is to choose R2 = 169 k

Ω

to set the divider current at 7

µA, and then calculate R1 using:

Figure 29. TPS76601 Adjustable LDO Regulator Programming

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TPS76601

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