Low-Cost, Low-Power, Low-Dropout,

SOT23-3 Voltage References

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11

Chip Information

TRANSISTOR COUNT: 70

Turn-On Time

These devices typically turn on and settle to within

0.1% of their final value in 30µs to 220µs depending on

the device. The turn-on time can increase up to 1.5ms

with the device operating at the minimum dropout volt-

age and the maximum load.

Positive and Negative

Low-Power Voltage Reference

Figure 1 shows a typical method for developing a bipo-

lar reference. The circuit uses a MAX681 voltage dou-

bler/inverter charge-pump converter to power an

ICL7652, thus creating a positive as well as a negative

reference voltage.