SLVS529D April   2004  – January 2015 TL1431-EP

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Simplified Schematic
  5. 5 Revision History
  6. 6 Pin Configuration and Functions
  7. 7 Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 ESD Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information
    5. 7.5 Dissipation Rating Table
    6. 7.6 Electrical Characteristics
    7. 7.7 Typical Characteristics
  8. 8 Parameter Measurement Information
  9. 9 Detailed Description
    1. 9.1 Overview
    2. 9.2 Functional Block Diagram
    3. 9.3 Feature Description
    4. 9.4 Device Functional Modes
  10. 10Application and Implementation
    1. 10.1 Application Information
    2. 10.2 Typical Application
      1. 10.2.1 Design Requirements
      2. 10.2.2 Detailed Design Procedure
      3. 10.2.3 Application Curves
  11. 11Power Supply Recommendations
  12. 12Layout
    1. 12.1 Layout Guidelines
    2. 12.2 Layout Example
  13. 13Device and Documentation Support
    1. 13.1 Trademarks
    2. 13.2 Electrostatic Discharge Caution
    3. 13.3 Glossary
  14. 14Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

7 Specifications

7.1 Absolute Maximum Ratings(1)

over operating free-air temperature range (unless otherwise noted)
MIN MAX UNIT
Cathode voltage(2), VKA 37 V
Continuous cathode current, IKA –100 150 mA
Reference input current, II(ref) –0.00005 10 mA
Operating virtual junction temperature(3), TJ 150 °C
Lead temperature 1.6 mm (1/16 inch) from case for 10 s 260 °C
Storage temperature, Tstg –65 150 °C
(1) Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under Recommended Operating Conditions is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
(2) All voltage values are with respect to ANODE, unless otherwise noted.
(3) Long-term high-temperature storage and/or use at the absolute maximum ratings may result in a reduction of overall device life. See www.ti.com/ep_quality for additional information on enhanced plastic packaging.

7.2 ESD Ratings

VALUE UNIT
V(ESD) Electrostatic discharge Human body model (HBM), per ANSI/ESDA/JEDEC JS-001, all pins(1) ±4000 V
Charged device model (CDM), per JEDEC specification JESD22-C101, all pins(2) ±2000
(1) JEDEC document JEP155 states that 500-V HBM allows safe manufacturing with a standard ESD control process.
(2) JEDEC document JEP157 states that 250-V CDM allows safe manufacturing with a standard ESD control process.

7.3 Recommended Operating Conditions

MIN MAX UNIT
VKA Cathode voltage VI(ref) 36 V
IKA Cathode current 1 100 mA
TA Operating free-air temperature –55 125 °C

7.4 Thermal Information

THERMAL METRIC(1) TL1431-EP UNIT
D
8 PINS
RθJA(high) Junction-to-ambient thermal resistance (high K board) 97 °C/W
RθJA(low) Junction-to-ambient thermal resistance (low K board) 165
(1) For more information about traditional and new thermal metrics, see the IC Package Thermal Metrics application report, SPRA953.

7.5 Dissipation Rating Table

PACKAGE TA  ≤ 25°C
POWER RATING		 PACKAGE THERMAL IMPEDANCE DERATING FACTOR
ABOVE TA = 25°C		 TA = 70°C
ABSOLUTE MAXIMUM POWER RATING		 TA = 85°C
ABSOLUTE MAXIMUM POWER RATING		 TA = 125°C
ABSOLUTE MAXIMUM POWER RATING
D 1102 mW 97°C/W (High K board) 10 mW/°C 824 mW 670 mW 257 mW
165°C/W (Low K board) 6 mW/°C 484 mW 393 mW 151 mW

7.6 Electrical Characteristics

at specified free-air temperature, IKA = 10 mA (unless otherwise noted)
PARAMETER TEST CONDITIONS TA(1) TEST CIRCUIT MIN TYP MAX UNIT
VI(ref) Reference input voltage VKA = VI(ref) 25°C Figure 8 2490 2500 2510 mV
Full range 2470 2530
VI(dev) Deviation of reference input voltage over full temperature range(2) VKA = VI(ref) Full range Figure 8 17 mV
eq1_lvs529.gif Ratio of change in reference input voltage to the change in cathode voltage ΔVKA = 3 to 36 V Full range Figure 9 –1.1 –2 mV/V
II(ref) Reference input current R1 = 10 kΩ, R2 = ∞ 25°C Figure 9 1.5 2.5 μA
Full range 4
II(dev) Deviation of reference input current over full temperature range(2) R1 = 10 kΩ, R2 = ∞ Full range Figure 9 0.5 μA
Imin Minimum cathode current for regulation VKA = VI(ref) 25°C Figure 8 0.45 1 mA
Ioff Off-state cathode current VKA = 36 V, VI(ref) = 0 25°C Figure 10 0.18 0.5 μA
Full range 2
|zKA| Output impedance(3) VKA = VI(ref), ƒ ≤ 1 kHz,
IKA = 1 to 100 mA		 25°C Figure 8 0.2 0.4 Ω
(1) Full range is –40°C to 125°C for Q-suffix devices; –55°C to 125°C for M-suffix devices.
(2) The deviation parameters VI(dev) and II(dev) are defined as the differences between the maximum and minimum values obtained over the rated temperature range. The average full-range temperature coefficient of the reference input voltage eq2_lvs529.gif is defined as:
equ_gr_lvs592.gif
eq3_lvs529.gif is positive or negative, depending on whether minimum VI(ref) or maximum VI(ref), respectively, occurs at the lower temperature.
(3) The output impedance is defined as: eq4_lvs529.gif
When the device is operating with two external resistors (see Figure 9), the total dynamic impedance of the circuit is given by:
eq5_lvs529.gif , which is approximately equal to eq6_lvs529.gif.

7.7 Typical Characteristics

Data at high and low temperatures are applicable only within the recommended operating free-air temperature range.

Table 1. Table of Graphs

GRAPH TITLE FIGURE
Reference voltage vs Free-Air Temperature Figure 1
Reference current vs Free-Air Temperature Figure 2
Cathode Current vs Cathode Voltage Figure 3, Figure 4
Off-State Cathode Current vs Free-Air Temperature Figure 5
Ratio of Delta Reference Voltage to Delta Cathode Voltage vs Free-Air Temperature Figure 6
Equivalent Input-Noise Voltage vs Frequency Figure 7
Equivalent Input-Noise Voltage Over a 10-s Period Figure 11
Small-Signal Voltage Amplification vs Frequency Figure 13
Reference Impedance vs Frequency Figure 15
Pulse Response Figure 17
Stability Boundary Conditions Figure 19
D001_SLVS529.gif
VI(ref) = VKA IKA = 10 mA
Figure 1. Reference Voltage vs Free-Air Temperature
D003_SLVS529.gif
VKA = VI(ref) TA = 25°C
Figure 3. Cathode Current vs Cathode Voltage
D005_SLVS529.gif
VKA = 36 V VI(ref) = 0
Figure 5. Off-State Cathode Current vs Free-Air Temperature
D007_SLVS529.gif
IO = 10 mA TA = 25°C
Figure 7. Equivalent Input-Noise Voltage vs Frequency
D002_SLVS529.gif
IKA = 10 mA R1 = 10 kΩ R2 = ∞
Figure 2. Reference Current vs Free-Air Temperature
D004_SLVS529.gif
VKA = VI(ref) TA = 25°C
Figure 4. Cathode Current vs Cathode Voltage
D006_SLVS529.gif
VKA = 3 to 36 V
Figure 6. Ratio of Delta Reference Voltage to Delta Cathode Voltage vs Free-Air Temperature