SNVS074E May   2001  – May 2016 LM2591HV

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Description (continued)
  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 Electrical Characteristics LM2591HV-3.3
    6. 7.6 Electrical Characteristics LM2591HV-5.0
    7. 7.7 Electrical Characteristics LM2591HV-ADJ
    8. 7.8 Electrical Characteristics All Output Voltage Versions
    9. 7.9 Typical Characteristics
  8. 8 Parameter Measurement Information
    1. 8.1 Test Circuits
  9. 9 Detailed Description
    1. 9.1 Overview
    2. 9.2 Functional Block Diagram
    3. 9.3 Feature Description
      1. 9.3.1 Delayed Start-Up
      2. 9.3.2 Undervoltage Lockout
    4. 9.4 Device Functional Modes
      1. 9.4.1 Shutdown Mode
      2. 9.4.2 Active Mode
  10. 10Application and Implementation
    1. 10.1 Application Information
      1. 10.1.1 Feedforward Capacitor
      2. 10.1.2 Input Capacitor
      3. 10.1.3 Output Capacitor
      4. 10.1.4 Catch Diode
      5. 10.1.5 Inverting Regulator
      6. 10.1.6 Inverting Regulator Shutdown Methods
    2. 10.2 Typical Application
      1. 10.2.1 Design Requirements
      2. 10.2.2 Detailed Design Procedure
        1. 10.2.2.1 Inductor Selection Procedure
      3. 10.2.3 Application Curves
  11. 11Power Supply Recommendations
  12. 12Layout
    1. 12.1 Layout Guidelines
    2. 12.2 Layout Examples
  13. 13Device and Documentation Support
    1. 13.1 Community Resources
    2. 13.2 Trademarks
    3. 13.3 Electrostatic Discharge Caution
    4. 13.4 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)(2)

MIN MAX UNIT
Maximum supply voltage (VIN) 63 V
ON/OFF pin voltage −0.3 25 V
Feedback pin voltage −0.3 25 V
Output voltage to ground (Steady-state) −1 V
Power dissipation Internally limited
Lead temperature      KTT package Vapor phase (60 sec.) 215 °C
Infrared (10 sec.) 245
NDH package (Soldering, 10 sec.) 260
Maximum junction temperature 150 °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, 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 Military/Aerospace specified devices are required, please contact the TI Sales Office/ Distributors for availability and specifications.

7.2 ESD Ratings

VALUE UNIT
V(ESD) Electrostatic discharge Human-body model (HBM), per ANSI/ESDA/JEDEC JS-001(1)(2) ±2000 V
(1) JEDEC document JEP155 states that 500-V HBM allows safe manufacturing with a standard ESD control process.
(2) The human body model is a 100-pF capacitor discharged through a 1.5-kΩ resistor into each pin.

7.3 Recommended Operating Conditions

MIN MAX UNIT
Temperature −40 125 °C
Supply voltage 4.5 60 V

7.4 Thermal Information

THERMAL METRIC(1) LM2591HV UNIT
KTT (DDPAK/TO-263) NDH (TO-220)
5 PINS 5 PINS
RθJA Junction-to-ambient thermal resistance See (2)(3) 50 50 °C/W
RθJC(top) Junction-to-case (top) thermal resistance 2 2 °C/W
(1) For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application report, SPRA953.
(2) The package thermal impedance is calculated in accordance to JESD 51-7
(3) Thermal Resistances were simulated on a 4-layer, JEDEC board

7.5 Electrical Characteristics LM2591HV-3.3

Specifications are for TJ = 25°C unless otherwise noted.
PARAMETER TEST CONDITIONS MIN(1)   TYP(2)  MAX(1) UNIT
SYSTEM PARAMETERS – See Test Circuits(3)
VOUT Output Voltage 4.75 V ≤ VIN ≤ 60 V,
0.2 A ≤ ILOAD ≤ 1 A		 3.168 3.3 3.432 V
TA = –40°C to 125°C 3.135 3.465
η Efficiency VIN = 12 V, ILOAD = 1 A 77%
(1) All limits ensured at room temperature (TJ = 25°C) unless otherwise noted. All room temperature limits are 100% production tested. All limits at temperature extremes are ensured through correlation using standard Statistical Quality Control (SQC) methods. All limits are used to calculate Average Outgoing Quality Level (AOQL).
(2) Typical numbers are at 25°C and represent the most likely norm.
(3) External components such as the catch diode, inductor, input and output capacitors can affect switching regulator system performance. When the LM2591HV is used as shown in Test Circuits test circuit, system performance will be as shown in Electrical Characteristics.

7.6 Electrical Characteristics LM2591HV-5.0

Specifications are for TJ = 25°C unless otherwise noted.
PARAMETER TEST CONDITIONS MIN(1)   TYP(2)  MAX(1) UNIT
SYSTEM PARAMETERS – See Test Circuits(3)
VOUT Output Voltage 7 V ≤ VIN ≤ 60 V, 0.2 A ≤ ILOAD ≤ 1 A 4.8 5 5.2 V
TA = –40°C to 125°C 4.75 5.25
η Efficiency VIN = 12 V, ILOAD = 1 A 82%
(1) All limits ensured at room temperature (TJ = 25°C) unless otherwise noted. All room temperature limits are 100% production tested. All limits at temperature extremes are ensured through correlation using standard Statistical Quality Control (SQC) methods. All limits are used to calculate Average Outgoing Quality Level (AOQL).
(2) Typical numbers are at 25°C and represent the most likely norm.
(3) External components such as the catch diode, inductor, input and output capacitors can affect switching regulator system performance. When the LM2591HV is used as shown in Test Circuits test circuit, system performance will be as shown in Electrical Characteristics.

7.7 Electrical Characteristics LM2591HV-ADJ

Specifications are for TJ = 25°C unless otherwise noted
PARAMETER TEST CONDITIONS MIN(1)   TYP(2)   MAX(1) UNIT
SYSTEM PARAMETERS – See Test Circuits(3)
VFB Feedback Voltage 4.5 V ≤ VIN ≤ 60 V, 0.2 A ≤ ILOAD ≤ 1 A
VOUT programmed for 3 V. Circuit of Test Circuits.		 1.193 1.23 1.267 V
TA = –40°C to 125°C 1.18 1.28
η Efficiency VIN = 12 V, VOUT = 3 V, ILOAD = 1 A 76%
(1) All limits ensured at room temperature (TJ = 25°C) unless otherwise noted. All room temperature limits are 100% production tested. All limits at temperature extremes are ensured through correlation using standard Statistical Quality Control (SQC) methods. All limits are used to calculate Average Outgoing Quality Level (AOQL).
(2) Typical numbers are at 25°C and represent the most likely norm.
(3) External components such as the catch diode, inductor, input and output capacitors can affect switching regulator system performance. When the LM2591HV is used as shown in Test Circuits test circuit, system performance will be as shown in Electrical Characteristics.

7.8 Electrical Characteristics All Output Voltage Versions

Specifications are for TJ = 25°C, ILOAD = 500 mA, and VIN = 12V for the 3.3-V, 5-V, and adjustable versions, unless otherwise noted.
PARAMETER TEST CONDITIONS MIN(1)   TYP(2)   MAX(1) UNIT
DEVICE PARAMETERS
Ib Feedback Bias Current Adjustable Version Only, VFB = 1.3 V 10 50 nA
TA = –40°C to 125°C 100
fO Oscillator Frequency See (3) 127 150 173 kHz
TA = –40°C to 125°C 110 173
VSAT Saturation Voltage IOUT = 1 A (4)(5) 0.95 1.2 V
TA = –40°C to 125°C 1.3
DC Max Duty Cycle (ON) See (5)(6) 100%
Min Duty Cycle (OFF) 0%
ICLIM Switch current Limit Peak Current(4)(5) 1.3 1.9 2.8 A
TA = –40°C to 125°C 1.2 3.0
IL Output Leakage Current Output = 0 V 5 50 μA
Output = −1 V (4)(6)(7) 5 30 mA
IQ Operating Quiescent Current SD/SS Pin Open (6) 5 10 mA
ISTBY Standby Quiescent Current SD/SS pin = 0 V (7) 90 200 μA
TA = –40°C to 125°C 250
ON/OFF CONTROL – See Test Circuits
VIH
VIL		 ON/OFF Pin Logic Input Threshold Voltage Low (Regulator ON)
High (Regulator OFF)		 1.3 V
TA = –40°C to 125°C 2.0 0.6
IH ON/OFF Pin Input Current VLOGIC = 2.5 V (Regulator OFF) 5 15 μA
IL VLOGIC = 0.5 V (Regulator ON) 0.02 5 μA
(1) All limits ensured at room temperature (TJ = 25°C) unless otherwise noted. All room temperature limits are 100% production tested. All limits at temperature extremes are ensured through correlation using standard Statistical Quality Control (SQC) methods. All limits are used to calculate Average Outgoing Quality Level (AOQL).
(2) Typical numbers are at 25°C and represent the most likely norm.
(3) The switching frequency is reduced when the second stage current limit is activated. The amount of reduction is determined by the severity of current overload.
(4) No diode, inductor or capacitor connected to output pin.
(5) Feedback pin removed from output and connected to 0 V to force the output transistor switch ON.
(6) Feedback pin removed from output and connected to 12 V for the 3.3-V, 5-V, and the ADJ. version to force the output transistor switch OFF.
(7) VIN = 60 V.

7.9 Typical Characteristics

(Circuit of Test Circuits)
LM2591HV 10129302.png Figure 1. Normalized Output Voltage
LM2591HV 10129304.png Figure 3. Efficiency
LM2591HV 10129306.png Figure 5. Switch Current Limit
LM2591HV 10129308.png Figure 7. Operating Quiescent Current
LM2591HV 10129310.png Figure 9. Minimum Operating Supply Voltage
LM2591HV 10129313.png Figure 11. Switching Frequency
LM2591HV 10129380.png
Figure 13. ON/OFF Pin Current (Sinking)
LM2591HV 10129320.png
Continuous Mode Switching Waveforms VIN = 20V, VOUT = 5V, ILOAD = 1A L = 52 μH, COUT = 100 μF, COUT ESR = 100 mΩ
Output Pin Voltage, 10V/div.
Inductor Current 0.5A/div.
Output Ripple Voltage, 50 mV/div.
Figure 15. Horizontal Time Base: 2 μs/div
LM2591HV 10129321.png
Load Transient Response for Continuous Mode VIN = 20V, VOUT = 5V, ILOAD = 250 mA to 1A L = 52 μH, COUT = 100 μF, COUT ESR = 100 mΩ
Output Voltage, 100 mV/div. (AC)
250 mA to 1A Load Pulse
Figure 17. Horizontal Time Base: 50 μs/div
LM2591HV 10129303.png Figure 2. Line Regulation
LM2591HV 10129305.png Figure 4. Switch Saturation Voltage
LM2591HV 10129307.png Figure 6. Dropout Voltage
LM2591HV 10129309.png Figure 8. Shutdown Quiescent Current
LM2591HV 10129311.png Figure 10. Feedback Pin Bias Current
LM2591HV 10129379.png Figure 12. ON/OFF Threshold Voltage
LM2591HV 10129378.png Figure 14. Internal Gain-Phase Characteristics
LM2591HV 10129319.png
Discontinuous Mode Switching Waveforms VIN = 20V, VOUT = 5V, ILOAD = 250 mA L = 15 μH, COUT = 150 μF, COUT ESR = 90 mΩ
Output Pin Voltage, 10V/div.
Inductor Current 0.25A/div.
Output Ripple Voltage, 100 mV/div.
Figure 16. Horizontal Time Base: 2 μs/div
LM2591HV 10129322.png
Load Transient Response for Discontinuous Mode VIN = 20V, VOUT = 5V, ILOAD = 250 mA to 1A L = 15 μH, COUT = 150 μF, COUT ESR = 90 mΩ
Output Voltage, 100 mV/div. (AC)
250 mA to 1A Load Pulse
Figure 18. Horizontal Time Base: 200 μs/div