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PDF AT431 Data sheet ( Hoja de datos )
| Número de pieza | AT431 | |
| Descripción | low-Voltage Adjustable Precision Shunt Regulator | |
| Fabricantes | Aimtron Technology | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de AT431 (archivo pdf) en la parte inferior de esta página. Total 11 Páginas | ||
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AT431
Preliminary Product Information
1.24V low-Voltage Adjustable Precision
Shunt Regulator
Features
․Low-Voltage Operation: Down to 1.24V
․1% Reference-Voltage Tolerance
․Adjustable Output Voltage, Vo=Vref to 12V
․Low Operational Cathode Current….50μA
․0.25Ω Typical Output Impedance
․SOT-23 and TO-92 Packages
Application
․Linear Regulators
․Voltage Reference for Power Circuit
Description
The AT431 is low-voltage three-terminal
adjustable voltage reference with specified
thermal stability over applicable commercial
temperature ranges. Output voltage may be set to
any value between Vref (1.24V) and 12V with
two external resistors (see Figure 2).
When used with an optocoupler, the AT431 is
ideal voltage reference in isolated feedback
circuits for 1.8V to 12 V switching-mode power
supplies. This device has typical output
impedance of 0.20Ω. Active output circuitry
provides a very sharp turn-on characteristic,
making the AT431 excellent replacements for
low-voltage zener diodes in many applications,
including onboard regulation and adjustable
power supplies.
Block Diagram and Symbol
Aimtron reserves the right without notice to change this circuitry and specifications.
7F, No.9, PARK AVENUE II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.
Tel: 886-3-563-0878 Fax: 886-3-563-0879
WWW: http://www.aimtron.com.tw
2/8/2006 REV:1.1
Email: [email protected]
1
1 page  
AT431
Preliminary Product Information
1.24V Low-Voltage Adjustable Precision
Shunt Regulator
Figure 4.
Figure 5.
Figure 6.
Figure 7.
7F, No.9, PARK AVENUE II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.
Tel: 886-3-563-0878 Fax: 886-3-563-0879
WWW: http://www.aimtron.com.tw
2/8/2006 REV:1.1
Email: [email protected]
5
5 Page 
Reflow Profiles
AT431
Preliminary Product Information
1.24V Low-Voltage Adjustable Precision
Shunt Regulator
Profile Feature
Sn-Pb Eutectic Assembly
Pb-Free Assembly
Large Body
Small Body
Large Body
Small Body
Pkg. thickness ≥2.5mm Pkg. thickness <2.5mm Pkg. thickness ≥2.5mm or Pkg. thickness ≥2.5mm
or Pkg. volume ≥350mm3 or Pkg. volume <350mm3 Pkg. volume ≥350mm3 or Pkg. volume ≥350mm3
Average ramp-up rate
(TL to TP)
Preheat
-Temperature Min(Tsmin)
-Temperature Max (Tsmax)
-Time (min to max)(ts)
Tsmax to TL
-Ramp-up Rate
Time maintained above:
-Temperature (TL)
-Time (tL)
Peak Temperature(TP)
Time within 5°C of actual Peak
Temperature (tP)
Ramp-down Rate
Time 25°C to Peak Temperature
3°C/second max.
100°C
150°C
60-120 seconds
183°C
60-150 seconds
225+0/-5°C
10-30 seconds
240+0/-5°C
10-30 seconds
6°C/second max.
6 minutes max.
3°C/second max.
150°C
200°C
60-180 seconds
3°C/second max.
217°C
60-150 seconds
245+0/-5°C
10-30 seconds
250+0/-5°C
20-40 seconds
3°C/second max.
8 minutes max.
*All temperatures refer to topside of the package, measured on the package body surface.
7F, No.9, PARK AVENUE II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.
Tel: 886-3-563-0878 Fax: 886-3-563-0879
WWW: http://www.aimtron.com.tw
2/8/2006 REV:1.1
Email: [email protected]
11
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet AT431.PDF ] | |
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