SNVS170D October   2001  – April 2016 LP2983

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
  6. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 High-Accuracy Output Voltage
      2. 7.3.2 Low Ground Current
      3. 7.3.3 Reverse Input-Output Voltage
      4. 7.3.4 ON/OFF Input Operation
      5. 7.3.5 Thermal Protection
    4. 7.4 Device Functional Modes
      1. 7.4.1 Operation With VO(NOM) + 1 V ≤ VIN < 16 V
      2. 7.4.2 Operation With ON/OFF Control
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1 External Capacitors
          1. 8.2.2.1.1 Input Capacitor
          2. 8.2.2.1.2 Output Capacitors
        2. 8.2.2.2 Capacitor Characteristics
        3. 8.2.2.3 Power Dissipation
        4. 8.2.2.4 Estimating Junction Temperature
      3. 8.2.3 Application Curves
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Documentation Support
      1. 11.1.1 Related Documentation
    2. 11.2 Community Resources
    3. 11.3 Trademarks
    4. 11.4 Electrostatic Discharge Caution
    5. 11.5 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

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

6 Specifications

6.1 Absolute Maximum Ratings

over operating free-air temperature range (unless otherwise noted)(1)
MIN MAX UNIT
Input supply voltage (survival) −0.3 16 V
Input supply voltage (operating) 2.3 16 V
Shutdown input voltage (survival) −0.3 16 V
Output voltage (survival)(2) −0.3 9 V
IOUT (survival) Short-circuit protected
Input-output voltage (survival)(3) −0.3 16 V
Operating junction temperature −40 125 °C
Power dissipation(4) Internally limited
Storage temperature –65 150 °C
(1) Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, which do not imply functional operation of the device at these or any other conditions beyond those indicated under Recommended Operating Conditions. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
(2) If used in a dual-supply system where the regulator load is returned to a negative supply, the LP2983 output must be diode-clamped to ground.
(3) The output PNP structure contains a diode between the IN and OUT pins that is normally reverse-biased. Reversing the polarity from VIN to VOUT turn on this diode (See Reverse Input-Output Voltage).
(4) The maximum allowable power dissipation is a function of the maximum junction temperature, TJ(MAX), the junction-to-ambient thermal resistance, RθJA, and the ambient temperature, TA. The maximum allowable power dissipation at any ambient temperature is calculated using P(MAX) = (TJ(MAX) – TA) / RθJA. The value of RθJA for the SOT-23 package varies depending on the application board — the value given inThermal Information can be considered as the worstcase scenario. Exceeding the maximum allowable power dissipation causes excessive die temperature, and the regulator will go into thermal shutdown.

6.2 ESD Ratings

VALUE UNIT
V(ESD) Electrostatic discharge Human body model (HBM), per ANSI/ESDA/JEDEC JS-001 (all pins except pin 3)(1) ±2000 V
Human body model (HBM), per ANSI/ESDA/JEDEC JS-001 (pin 3)(1) ±1000
(1) JEDEC document JEP155 states that 500-V HBM allows safe manufacturing with a standard ESD control process.

6.3 Recommended Operating Conditions

over operating free-air temperature range (unless otherwise noted)
MIN MAX UNIT
Operating junction temperature −40 125 °C
Input supply voltage (operating) 2.2 16 V

6.4 Thermal Information

THERMAL METRIC(1) LP2983 UNIT
DBV (SOT-23)
5 PINS
RθJA Junction-to-ambient thermal resistance, High-K(2) 169.0 °C/W
RθJC(top) Junction-to-case (top) thermal resistance 121.8 °C/W
RθJB Junction-to-board thermal resistance 29.5 °C/W
ψJT Junction-to-top characterization parameter 16.1 °C/W
ψJB Junction-to-board characterization parameter 29.0 °C/W
(1) For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application report, SPRA953.
(2) Thermal resistance value RθJA is based on the EIA/JEDEC High-K printed circuit board defined by: JESD51-7 - High Effective Thermal Conductivity Test Board for Leaded Surface Mount Packages.

6.5 Electrical Characteristics

Unless otherwise specified: TJ = 25°C, VIN = VO(NOM) + 1 V, IL = 1 mA, COUT = 1 μF, VON/OFF = 2 V.
PARAMETER TEST CONDITIONS LP2981AI-XX(1) LP2981I-XX(1) UNIT
MIN TYP MAX MIN TYP MAX
ΔVO Output voltage tolerance −1% 1% −1.5% 1.5%
1 mA < IL < 50 mA –2% 2% –2.5% 2.5
1 mA < IL < 50 mA
–40°C ≤ TJ ≤ 125°C 		−2.5% 2.5% −3.5% 3.5%
1 mA < IL < 150 mA −2.5% 2.5% −3% 3%
1 mA < IL < 150 mA
–40°C ≤ TJ ≤ 125°C		 −3.5% 3.5% −4% 4%
ΔVO/ΔVIN Output voltage line regulation VO(NOM) + 1 V ≤ VIN ≤ 16 V 0.01 0.016 0.01 0.016 %/V
VO(NOM) + 1 V ≤ VIN ≤ 16 V
–40°C ≤ TJ ≤ 125°C		 0.032 0.032
IGND Ground pin current IL = 0 mA 65 95 65 95 μA
IL = 0 mA, –40°C ≤ TJ ≤ 125°C 125 125
IL = 1 mA 75 110 75 110
IL = 1 mA, –40°C ≤ TJ ≤ 125°C 170 170
IL = 10 mA 120 220 120 220
IL = 10 mA, –40°C ≤ TJ ≤ 125°C 400 400
IL = 50 mA 300 500 300 500
IL = 50 mA, –40°C ≤ TJ ≤ 125°C 900 900
IL = 150 mA 825 1200 825 1500
IL = 150 mA, –40°C ≤ TJ ≤ 125°C 2000 2000
VON/OFF < 0.15 V 6 12 6 12
VON/OFF < 0.05 V
–40°C ≤ TJ ≤ 125°C		 0.2 2 0.2 2
VIN (min) Minimum VIN required to maintain output regulation 2.05 V
–40°C ≤ TJ ≤ 125°C 2.2 2.2
VON/OFF ON/OFF input voltage(2) High = O/P ON 1.4 1.4 V
High = O/P ON
–40°C ≤ TJ ≤ 125°C		 1.6 1.6
Low = O/P OFF 0.1 0.1
Low = O/P OFF
–40°C ≤ TJ ≤ 125°C		 0.05 0.05
ION/OFF ON/OFF input current VON/OFF = 0 V 0.01 0.01 μA
VON/OFF = 0 V
–40°C ≤ TJ ≤ 125°C		 –2 –2
VON/OFF = 5 V 5 5
VON/OFF = 5 V
–40°C ≤ TJ ≤ 125°C		 15 15
en Output noise voltage (RMS) BW = 300 Hz to 50 kHz
VOUT = 1.2 V, COUT = 10 μF		 60 60 μV
ΔVO/ΔVIN Ripple rejection ƒ = 1 kHz, COUT = 2.2 μF 65 65 dB
IO(MAX) Short-circuit current RL = 0 Ω (steady state)(3) 400 400 mA
IO(PK) Peak output current VOUT ≥ VO(NOM) − 5% 250 250 mA
(1) Limits are 100% production tested at 25°C. Limits over the operating temperature range are ensured through correlation using Statistical Quality Control (SQC) methods. The limits are used to calculate Average Outgoing Quality Level (AOQL).
(2) The ON/OFF inputs must be properly driven to prevent misoperation. For details, see Operation With ON/OFF Control.
(3) The LP2983 has foldback current limiting which allows a high peak current when VOUT > 0.5 V, and then reduces the maximum output current as VOUT is forced down to ground. See related curve(s) in Typical Characteristics section.

6.6 Typical Characteristics

Unless otherwise specified: CIN = 1 µF, COUT = 2.2 µF, VIN = VOUT(NOM) + 1, TA = 25°C, ON/OFF pin is tied to VIN.
LP2983 20029107.png
Figure 1. LP2983 Tempco
LP2983 20029109.png
Load = 0 mA
Figure 3. Input Current vs VIN
LP2983 20029108.png
Figure 2. Minimum Input Voltage vs Temperature
LP2983 20029110.png
Load = 1 mA
Figure 4. Input Current vs VIN
LP2983 20029111.png
Load = 50 mA and 150 mA
Figure 5. Input Current vs VIN
LP2983 20029113.png
Figure 7. GND Pin vs Temperature and Load
LP2983 20029115.png
Load = 150 mA ΔVIN = 1 V
Figure 9. Line Transient Response
LP2983 20029117.png
Load = 150 mA ΔVIN = 13.8 V
Figure 11. Line Transient Response
LP2983 20029119.png
COUT = 2.2 µF
Figure 13. Ripple Rejection
LP2983 20029127.png
Figure 15. Short-Circuit Current vs Temperature
LP2983 20029123.png
VIN = 2.8 V
Figure 17. Short-Circuit Current
LP2983 20029125.png
COUT = 4.7 µF
Figure 19. Load Transient Response
LP2983 20029112.png
Figure 6. GND Pin vs Load Current
LP2983 20029114.png
Load = 1 mA ΔVIN = 1 V
Figure 8. Line Transient Response
LP2983 20029116.png
Load = 1 mA ΔVIN = 13.8 V
Figure 10. Line Transient Response
LP2983 20029118.png
Figure 12. Noise Density
LP2983 20029121.png
Figure 14. Turnon Time
LP2983 20029122.png
VIN = 16 V
Figure 16. Short-Circuit Current
LP2983 20029124.png
VIN = 6 V
Figure 18. Short-Circuit Current
LP2983 20029126.png
COUT = 2.2 µF
Figure 20. Load Transient Response