0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

4.5

5.0

0

0.25

0.5

0.75

1

1.25

1.5

ICHARGE (mA)

C001

LPV521

www.ti.com

SNOSB14D – AUGUST 2009 – REVISED DECEMBER 2014

Typical Applications (continued)

the measuring circuit supply current and extend battery life.

of the circuit. With the components shown in Figure 68 the measurement circuit supply current can be kept below

1.5 µA and measure 100 µA to 1 mA.

8.2.3.3 Application Curve

Figure 69. Calculated High-Side Current Sense Circuit Output

9 Power Supply Recommendations

The LPV521 is specified for operation from 1.6 V to 5.5 V (±0.8 V to ±2.75 V) over a –40°C to 125°C

temperature range. Parameters that can exhibit significant variance with regard to operating voltage or

temperature are presented in the Typical Characteristics.

CAUTION

Supply voltages larger than 6 V can permanently damage the device.

Low bandwidth nanopower devices do not have good high frequency (>1KHz) AC PSRR rejection against high-

frequency switching supplies and other kHz and above noise sources, so extra supply filtering is recommended if

kHz range noise is expected on the power supply lines.

Copyright © 2009–2014, Texas Instruments Incorporated

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