Document
Semiconductor
SL431A
Programmable Voltage Reference
Features
• Programmable output voltage to 36 volts • Sink current capability of 1.0mA to 100mA • Low dynamic impedance 0.15Ω typical • Temperature compensated for operation over full rated operating temperature • Equivalent full-range temperature coefficient of 50ppm/°C (Typical) • Low output Noise voltage • Voltage reference tolerance : ±1.0% (Ta=25 )
Ordering Information
Type NO. SL431A
Outline Dimensions
Marking SL431A
Package Code TO-92
unit : mm
Symbol
4.5±0.1
3.45±0.1 2.25±0.1
4.5±0.1
0.4±0.02
1.27 Typ. 2.54 Typ.
123
2.06±0.1
Functional block diagram
KSI-9008-001
PIN Connections 1. Reference 2. Anode 3. Cathode
1
1.20±0.1 0.38
SL431A
Absolute maximum ratings
(Operating ambient temperature range applies unless other specified)
Parameter
Symbol
Cathode to anode voltage Cathode current range(Continuous) Reference input current range(Continuous) Power dissipation Operating temperature range Storage temperature range
VKA IK Iref PD* Topr Tstg
Ratings
37 -100 ~+150 -0.05~+10
700 -40~+85 -65~+150
Unit
V mA mA mW °C °C
Recommended operating conditions
Parameter
Symbol
Cathode to Anode voltage Cathode current range(Continuous)
VKA IK
Ratings
Min.
Max.
Vref 36
1.0 100
Unit
V mA
Electrical Characteristics
(Ambient temperature at 25°C, unless otherwise noted.)
Parameter
Symbol
Reference input voltage (Fig. 1, Note 1) Deviation of reference input voltage Over temperature(Fig. 1, Note 1,2)
Ratio of change in reference input Voltage to the change in cathode Voltage(Fig. 2)
Vref
∆Vref ∆Vref ∆VKA
Reference input current(Fig. 2)
Deviation of reference input voltage over temperature(Fig. 2) Minimum cathode current for Regulation(Fig. 1)
Off-state cathode current(Fig. 3)
Iref ∆Iref IMIN IOFF
Dynamic impedance(Fig. 1, Note 3)
ZKA
Condition
VKA=Vref, IK=10mA
VKA=Vref , IK=10mA @Ta=TLOW to THIGH IK=10mA ∆VKA=10V-Vref ∆VKA=36V-10V IK=10mA R1=10KΩ, R2=∞ IK=10mA R1=10KΩ, R2=∞
VKA=Vref
VKA=36V, Vref=0V VKA=Vref, f≤1.0KHz IKA=1.0mA-100mA
Min. Typ. Max. Unit
2.47 2.495 2.52
V
- 7.0 30 mV
- 1.2 2.7 mV/V - 0.7 2.0 - 1.8 4.0 µA
- 0.4 2.5 µA
- 0.35 1.0 mA - 2.7 1000 nA - 0.14 0.5 Ω
Fig. 1
Fig. 2
Fig. 3
: TLOW=-40°C, THIGH=+85°C , : ∆Vref= Vref Max. - Vref Min. , : ZKA= ∆VKA/ ∆IK KSI-9008-001
2
Characteristic diagrams
Fig. 4 IK vs. VKA
Fig. 5 IMIN vs. VKA
SL431A
Fig. 6 ∆V ref vs. Ta
Fig. 7 ∆Vref vs. VKA
Fig. 8 Gv vs. frequency
Fig. 9 Pulse reponse
KSI-9008-001
3
.