SNF431

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) ...