PSSI2021SAY Ver la hoja de datos (PDF) - NXP Semiconductors.

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PSSI2021SAY

Constant current source in SOT353 package

NXP Semiconductors. 

NXP Semiconductors

PSSI2021SAY

Constant current source in SOT353 package

8. Application information

External resistor calculation

The output current can be set by connecting an external resistor between VS (pin 5) and

REXT (pin 4).

Iout then calculates to:

Iout = 0--R-.--6-e--1-x--t7- + 15 µA

Without an external resistor the output current will be typically 15 µA.

Typical output currents versus supply voltage VS

The applied supply voltage determines the output current. Table 8 gives typical Iout values

at specified supply voltages, assuming that the working output current is 70% of the

maximum possible output current.

Table 8.

VS (V)

5

12

24

36

Typical output currents at specified supply voltages

Iout (mA)

6

18

38

60

PSSI2021SAY_3

Product data sheet

Rev. 03 — 27 August 2009

© NXP B.V. 2009. All rights reserved.

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