LM2591HVT-5.0/NOPB National Semiconductor, LM2591HVT-5.0/NOPB Datasheet

IC REG SIMPLE SWITCHER TO220-5

LM2591HVT-5.0/NOPB

Manufacturer Part Number
LM2591HVT-5.0/NOPB
Description
IC REG SIMPLE SWITCHER TO220-5
Manufacturer
National Semiconductor
Series
SIMPLE SWITCHER®r
Type
Step-Down (Buck)r
Datasheet

Specifications of LM2591HVT-5.0/NOPB

Internal Switch(s)
Yes
Synchronous Rectifier
No
Number Of Outputs
1
Voltage - Output
5V
Current - Output
1A
Frequency - Switching
150kHz
Voltage - Input
4.5 ~ 60 V
Operating Temperature
-40°C ~ 125°C
Mounting Type
Through Hole
Package / Case
TO-220-5 (Bent and Staggered Leads)
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Power - Output
-
Other names
*LM2591HVT-5.0
*LM2591HVT-5.0/NOPB
LM2591HVT-5.0
© 2003 National Semiconductor Corporation
LM2591HV
SIMPLE SWITCHER
Step-Down Voltage Regulator
General Description
The LM2591HV series of regulators are monolithic inte-
grated circuits that provide all the active functions for a
step-down (buck) switching regulator, capable of driving a
1A load with excellent line and load regulation. These de-
vices are available in fixed output voltages of 3.3V, 5V, and
an adjustable output version.
This series of switching regulators is similar to the
LM2590HV, but without some of the supervisory and perfor-
mance features of the latter.
Requiring a minimum number of external components, these
regulators are simple to use and include internal frequency
compensation
fixed-frequency oscillator.
The LM2591HV operates at a switching frequency of 150
kHz thus allowing smaller sized filter components than what
would be needed with lower frequency switching regulators.
Available in a standard 5-lead TO-220 package with several
different lead bend options, and a 5-lead TO-263 Surface
mount package.
Other features include a guaranteed
put voltage under all conditions of input voltage and output
load conditions, and
ternal shutdown is included, featuring typically 90 µA
standby current. Self protection features include a two stage
Typical Application
SIMPLE SWITCHER
®
, improved line and load specifications and a
and Switchers Made Simple
±
15% on the oscillator frequency. Ex-
®
(Fixed Output Voltage Versions)
are registered trademarks of National Semiconductor Corporation.
±
4% tolerance on out-
DS101293
®
Power Converter 150 kHz 1A
current limit for the output switch and an over temperature
shutdown for complete protection under fault conditions.
Features
n 3.3V, 5V, and adjustable output versions
n Adjustable version output voltage range, 1.2V to 57V
n Guaranteed 1A output load current
n Available in 5-pin TO-220 and TO-263 (surface mount)
n Input voltage range up to 60V
n 150 kHz fixed frequency internal oscillator
n On/Off control
n Low power standby mode, I
n High Efficiency
n Thermal shutdown and current limit protection
Applications
n Simple high-efficiency step-down (buck) regulator
n Efficient pre-regulator for linear regulators
n On-card switching regulators
n Positive to Negative converter
Package
±
Note:
4% max over line and load conditions
Patent Number 5,382,918.
Q
typically 90 µA
10129301
www.national.com
July 2003

Related parts for LM2591HVT-5.0/NOPB

LM2591HVT-5.0/NOPB 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 ...

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