AN2871

On-chip voltage regulator (VREG)

Doc ID 15304 Rev 3

9/25

For the example datasheet, the minimum gain at room temperature is 85. At

40 °C, the

transistor has an estimated gain of 54.

BC817-25 NPN bipolar 0.5A SOT23

This transistor is available from several semiconductor maker.

Figure 3.

ON Semiconductor BCP68 datasheet: example of temperature response

Table 3.

NXP datasheet: BC817-25 electrical characteristics at 25 °C

Symbol

Parameter

Min

Typ

Max

Unit

—

DC current gain

160

40

—

—

400

—

—