TLVH431A 精度为 1% 的低电压宽工作电流范围可调精密并联稳压器 | 德州仪器 TI.com.cn

TLVH431A (正在供货)

精度为 1% 的低电压宽工作电流范围可调精密并联稳压器

精度为 1% 的低电压宽工作电流范围可调精密并联稳压器 - TLVH431A
数据表
 

Different accuracy grades available

This device is available in 3 accuracy grades :

描述

The TLVH431 and TLVH432 devices are low-voltage 3-terminal adjustable voltage references, with specified thermal stability over applicable industrial and commercial temperature ranges. Output voltage can be set to any value between VREF (1.24 V) and 18 V with two external resistors (see ). These devices operate from a lower voltage (1.24 V) than the widely used TL431 and TL1431 shunt-regulator references.

When used with an optocoupler, the TLVH431 and TLVH432 devices are ideal voltage references in isolated feedback circuits for 3-V to 3.3-V switching-mode power supplies. They have a typical output impedance of 0.25 Ω. Active output circuitry provides a very sharp turn-on characteristic, making the TLVH431 and TLVH432 devices excellent replacements for low-voltage Zener diodes in many applications, including on-board regulation and adjustable power supplies.

The TLVH432 device is identical to the TLVH431 device, but is offered with different pinouts for the 3-pin SOT-23 and SOT-89 packages.

特性

  • Low-Voltage Operation: Down to 1.24 V
  • Reference Voltage Tolerances at 25°C
    • 0.5% for B Grade
    • 1% for A Grade
    • 1.5% for Standard Grade
  • Adjustable Output Voltage, VO = VREF to 18 V
  • Wide Operating Cathode Current Range: 100 µA to 70 mA
  • 0.25-Ω Typical Output Impedance
  • –40°C to +125°C Specifications
  • TLVH432 Provides Alternative Pinouts for SOT-23-3 and SOT-89 Packages
  • Ultra-Small SC-70 Package Offers 40% Smaller Footprint than SOT-23-3

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参数 与其它产品相比 并联电压基准

 
Reference Voltage
VO (V)
VO Adj (Min) (V)
VO Adj (Max) (V)
Initial Accuracy (Max) (%)
Temp Coeff (Max) (ppm/ degree C)
Rating
Operating Temperature Range (C)
Iz for Regulation (Min) (uA)
Iout/Iz (Max) (mA)
Package Group
TLVH431A ATL431 ATL432 TL431 TL431A TL431A-Q1 TL431B TL432 TL432A TL432A-Q1 TL432B TL432B-Q1 TLV431 TLV431A TLV431A-Q1 TLV431B TLV431B-Q1 TLVH431 TLVH431A-Q1 TLVH431B TLVH431B-Q1 TLVH432 TLVH432A TLVH432B
Adjustable     Adjustable     Adjustable     Adjustable     Adjustable     Adjustable     Adjustable     Adjustable     Adjustable     Adjustable     Adjustable     Adjustable     Adjustable     Adjustable     Adjustable     Adjustable     Adjustable     Adjustable     Adjustable     Adjustable     Adjustable     Adjustable     Adjustable     Adjustable    
N/A     2.5     2.5     2.495     2.495     2.495     2.495     N/A     2.495     2.495     2.495     N/A     N/A     N/A       N/A     N/A     N/A     N/A     N/A     N/A     N/A     N/A     N/A    
1.24     2.5     2.5     2.495     2.495     2.495     2.495     2.495     2.495     2.495     2.495     2.495     1.24     1.24     1.24     1.24     1.24     1.24     1.24     1.24     1.24     1.24     1.24     1.24    
18     36     36     36     36     36     36     36     36     36     36     36     6     6     6     6     6     18     18     18     18     18     18     18    
1     0.5
1    
0.5
1    
2     1     1     0.5     2     1     1     0.5     0.5     1.5     1     1     0.5     0.5     1.5     1     0.5     0.5     1.5     1     0.5    
138     92     92     92     92     92     92     92     92     92     92     92     138     138     161     138     161     138     161     138     161     138     138     138    
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