TPS76615_15 Datasheet, PDF (15/24 Pages) Texas Instruments – ULTRALOW QUIESCENT CURRENT 250-mA LOW DROPOUT VOLTAGE REGULATORS

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)
PROGRAMMING THE TPS76601 ADJUSTABLE LDO REGULATOR
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:
(1)
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 kΩ
to set the divider current at 7 µA, and then calculate R1 using:
(2)
Figure 29. TPS76601 Adjustable LDO Regulator Programming
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TPS76601