TLV9152SIRUGR datasheet(25/63 Pages) TI

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load

out

iso

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TLV9151, TLV9152, TLV9154

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SBOS986B – OCTOBER 2019 – REVISED MAY 2020

Product Folder Links: TLV9151 TLV9152 TLV9154

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For additional drive capability in unity-gain configurations, improve capacitive load drive by inserting a small

resistor, RISO, in series with the output, as shown in Figure 46. This resistor significantly reduces ringing and

maintains DC performance for purely capacitive loads. However, if a resistive load is in parallel with the

capacitive load, then a voltage divider is created, thus introducing a gain error at the output and slightly reducing

the output swing. The error introduced is proportional to the ratio RISO / RL, and is generally negligible at low

output levels. A high capacitive load drive makes the TLV915x well suited for applications such as reference

buffers, MOSFET gate drives, and cable-shield drives. The circuit shown in Figure 46 uses an isolation resistor,

RISO, to stabilize the output of an op amp. RISO modifies the open-loop gain of the system for increased phase

margin.

Figure 46. Extending Capacitive Load Drive With the TLV9151

TLV9152SIRUGR 数据表(PDF) 25 Page - Texas Instruments