Datasheet > AS4040BM-3

AS4040BM-3

更新时间： 2024-02-12 02:48:54

品牌	Logo	应用领域
西伯斯 - SIPEX		光电二极管
页数	文件大小	规格书
7页	128K
描述
Voltage Reference,

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技术参数
数据手册

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AS4040BM-3 技术参数

是否Rohs认证：	不符合	生命周期：	Obsolete
Reach Compliance Code：	unknown	风险等级：	5.78
Is Samacsys：	N	Base Number Matches：	1

AS4040BM-3 数据手册

AS4040

AS4040 Applications Hints

This device is designed for stable operation and has no need

of an external capacitor between pin 4 and 8. The reference

remains stable if a bypass capacitor is used.

Figure 1. AS4040 Fixed

Shunt Regulator Application

SOT-23

The AS4040 in the SOT-23 package has a parasitic Schottky

diode between pin 3 and pin 1. Pin 1 of SOT-23 must float

or be connected to pin 3.

V_S

Conventional Shunt Regulator

R_S

V_R

I_O+ I_L

I_L

In a conventional shunt regulator application (see Figure 1),

an external series resister (R_S) is connected between the

supply voltage and the AS4040. R_Sdetermines the current

that flows through the load (I_L) and the reference(I_Q). Since

load current and supply voltage may vary, R_Sshould be small

enough to supply at least the minimum acceptable I_Qto the

reference even when the supply voltage is at its minimum and

the load current is at its maximum value. When the supply

voltage is at its maximum and I_Lis at its minimum, R_Sshould

be large enough so that the current flowing through the

AS4040 is less than 15mA

V_O

I_Q

AS4040

R_Sis determined by the supply voltage (V_S), the load and

operating current (I_Land I_Q), reference’s reverse breakdown

voltage (V_R).

R_S= (V_S- V_R)/(I_L+I_Q)

Rev. 10/11/00

1 2 345 6 7

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