11 Power Supply Recommendation

The REF70 family of references features a low-dropout voltage. These references can be operated with a supply

of only 50 mV above the output voltage for 0-mA output current conditions. The dropout voltage will vary with

the output current so refer to the dropout voltage to see typical dropout voltage requirements. TI recommends a

supply bypass capacitor ranging between 0.1 µF to 10 µF.

During start-up the REF70 can experience moments of high input current due to the output capacitors. The input

current can momentarily rise to ISC.

Temperature (°C)

-50

-25

0

25

50

75

100

125

0

50

100

150

200

250

300

0mA

5mA

10mA

Figure 11-1. Dropout Voltage vs Temperature

REF70

SNAS781E – OCTOBER 2020 – REVISED JULY 2022

www.ti.com

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