SN431/SNF431
Programmable Voltage Reference
◈ Description
The SN431 series are 3-terminal precision shunt regulators tha...
SN431/SNF431
Programmable Voltage Reference
◈ Description
The SN431 series are 3-terminal precision shunt
regulators that are programmable over a wide voltage range of 2.495V to 36V with ±0.3%, ±0.5%, ±1.0% tolerance. The SN431 series have a low dynamic impedance of 0.15Ω. These features make the SN431 series an excellent replacement for zener diodes in numerous applications circuits that require a precision reference voltage.
◈ Features
Programmable output voltage from 2.495V to 36V Voltage reference tolerance : ±0.3%, ±0.5%, ±1.0% Cathode current capability of 1mA to 100mA
◈ Pin Assignment
(Top View)
A
RAK PKG : SOT-89 Apply Device : SN431xF
(Top View)
(Top View)
(Top View)
(1)K (2)R
(3)A
PKG : SOT-23 Apply Device : SN431xS
(Marking Side View)
(1)R (2)K
(3)A
PKG : SOT-23 Apply Device : SNF431xS
(Marking Side View)
A
NC NC K
R
RA K
RAK
PKG : SOT-25 Apply Device : SN431xN
PKG : TO-92 Apply Device : SN431x
PKG : TO-92M Apply Device : SN431xM
[ K : Cathode, A: Anode, R : Reference ]
KSD-I0A013-009
1
◈ Symbol
Cathode(K)
Reference(R) Anode(A)
SN431/SNF431
◈ Functional block diagram
Cathode(K)
Reference(R) VREF=2.495V
+ –
Anode(A)
◈ Ordering Information
Vref Tolerance
PKG Type
Device Name
TO-92
SN431A
TO-92M
SN431AM
±1%
SOT-23 SOT-23
SN431AS1) SNF431AS2)
SOT-25
SN431AN
SOT-89
SN431AF
TO-92
SN431B
TO-92M
SN431BM
±0.5%
SOT-23 SOT-23
SN431BS1) SNF431BS2)
SOT-25
SN431BN
SOT-89
SN431BF
±0.3%
SOT-23 SOT-23
SN431CS1) SNF431CS2)
...