LM2591HVT-5.0 National Semiconductor, LM2591HVT-5.0 Datasheet
![SWITCHING REG 1A 5.0V, 2591, TO-220](/photos/19/7/190790/42334036_sml.jpg)
LM2591HVT-5.0
Specifications of LM2591HVT-5.0
Available stocks
Related parts for LM2591HVT-5.0
LM2591HVT-5.0 Summary of contents
Page 1
... Output Voltage Versions) SIMPLE SWITCHER ® and Switchers Made Simple ® are registered trademarks of National Semiconductor Corporation. © 2003 National Semiconductor Corporation Power Converter 150 kHz 1A ® current limit for the output switch and an over temperature shutdown for complete protection under fault conditions. ...
Page 2
... Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Maximum Supply Voltage ( ON/OFF Pin Voltage Feedback Pin Voltage Output Voltage to Ground (Steady State) Power Dissipation Storage Temperature Range ESD Susceptibility LM2591HV-3 ...
Page 3
All Output Voltage Versions Electrical Characteristics Specifications with standard type face are for T ture Range. Unless otherwise specified, V Symbol Parameter DEVICE PARAMETERS I Feedback Bias Current b f Oscillator Frequency O V Saturation Voltage SAT DC Max Duty ...
Page 4
All Output Voltage Versions Electrical Characteristics Note 11: Junction to ambient thermal resistance (no external heat sink) for the package mounted TO-220 package mounted vertically, with the leads soldered to a printed circuit board with (1 oz.) copper area of ...
Page 5
Typical Performance Characteristics Switch Current Limit Operating Quiescent Current Minimum Operating Supply Voltage (Circuit of Figure 1) (Continued) 10129306 10129308 10129310 5 Dropout Voltage 10129307 Shutdown Quiescent Current 10129309 Feedback Pin Bias Current 10129311 www.national.com ...
Page 6
Typical Performance Characteristics Switching Frequency ON/OFF Pin Current (Sinking) Continuous Mode Switching Waveforms V = 20V 5V OUT µ 100 µF, C OUT A: Output Pin Voltage, 10V/div. B: Inductor Current ...
Page 7
... A: Output Voltage, 100 mV/div. (AC) B: 250 Load Pulse Horizontal Time Base: 50 µs/div. Connection Diagrams and Order Information Bent and Staggered Leads, Through Hole Package 5-Lead TO-220 (T) Order Number LM2591HVT-3.3, LM2591HVT-5.0, or LM2591HVT-ADJ See NS Package Number T05D (Circuit of Figure 1) (Continued) Load Transient Response for Discontinuous Mode V ...
Page 8
Test Circuit and Layout Guidelines Component Values shown are for V = 15V 5V 1A. OUT LOAD C — 470 µF, 50V, Aluminum Electrolytic Nichicon “PM Series” — 220 µF, 25V Aluminum Electrolytic, ...
Page 9
Block Diagram Pin Functions +V (Pin 1) — This is the positive input supply for the IC IN switching regulator. A suitable input bypass capacitor must be present at this pin to minimize voltage transients and to supply the switching ...
Page 10
Inductor Value Selection Guides (For Continuous Mode Operation) www.national.com FIGURE 2. LM2591HV-3.3 FIGURE 3. LM2591HV-5.0 10 10129365 10129366 ...
Page 11
Inductor Value Selection Guides (For Continuous Mode Operation) (Continued) FIGURE 4. LM2591HV-ADJ FIGURE 5. Current Ripple Ratio 11 10129367 10129368 www.national.com ...
Page 12
Inductor Value Selection Guides Coilcraft Inc. Coilcraft Inc., Europe Pulse Engineering Inc. Pulse Engineering Inc., Europe Renco Electronics Inc. Schott Corp. Cooper Electronic Tech. (Coiltronics) TDK FIGURE 6. Contact Information for Suggested Inductor Manufacturers www.national.com (For Continuous Mode Operation) (Continued) ...
Page 13
Application Information INDUCTOR SELECTION PROCEDURE Application Note AN-1197 titled "Selecting Inductors for Buck Converters" provides detailed information on this topic. For a quick-start the designer may refer to the nomographs pro- vided in Figure 2 to Figure 4. To widen ...
Page 14
Application Information Therefore, looking at Figure 2 we quick-select a 100µH/1A inductor (designed for 150 kHz operation) for this applica- tion should confirm that it is rated to handle 100 µJ (see Figure 4) by the procedure shown ...
Page 15
Application Information UNDERVOLTAGE LOCKOUT Some applications require the regulator to remain off until the input voltage reaches a predetermined voltage. An und- ervoltage lockout feature applied to a buck regulator is shown in Figure 8, while Figure 9 and Figure ...
Page 16
Application Information This circuit has an ON/OFF threshold of approximately 13V. FIGURE 9. Undervoltage Lockout for Inverting Regulator lNVERTING REGULATOR The circuit in Figure 11 converts a positive input voltage to a negative output voltage with a common ground. The ...
Page 17
Application Information This circuit has hysteresis Regulator starts switching 13V IN Regulator stops switching FIGURE 10. Undervoltage Lockout with Hysteresis for Inverting Regulator C — 68 µF/25V Tant. Sprague 595D IN 470 ...
Page 18
Application Information FIGURE 12. Inverting Regulator Ground Referenced Shutdown FIGURE 13. Inverting Regulator Ground Referenced Shutdown using Opto Device LAYOUT SUGGESTIONS As in any switching regulator, layout is very important. Rap- idly switching currents associated with wiring inductance can generate ...
Page 19
... Physical Dimensions inches (millimeters) unless otherwise noted Order Number LM2591HVT-3.3, LM2591HVT-5.0 5-Lead TO-220 Bent and Staggered Package or LM2591HVT-ADJ NS Package Number T05D 19 www.national.com ...
Page 20
... NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant ...