LM2593HVEVAL National Semiconductor, LM2593HVEVAL Datasheet

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LM2593HVEVAL

Manufacturer Part Number
LM2593HVEVAL
Description
BOARD EVALUATION LM2593
Manufacturer
National Semiconductor
Series
SIMPLE SWITCHER®r
Datasheets

Specifications of LM2593HVEVAL

Main Purpose
DC/DC, Step Down
Outputs And Type
1, Non-Isolated
Voltage - Output
12V
Current - Output
2A
Voltage - Input
4.5 ~ 60V
Regulator Topology
Buck
Frequency - Switching
150kHz
Board Type
Fully Populated
Utilized Ic / Part
LM2593
Lead Free Status / RoHS Status
Not applicable / Not applicable
Power - Output
-
© 2001 National Semiconductor Corporation
LM2593HV
SIMPLE SWITCHER
Step-Down Voltage Regulator, with Features
General Description
The LM2593HV 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
2A 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
LM2592HV with additional supervisory and performance fea-
tures.
Requiring a minimum number of external components, these
regulators are simple to use and include internal frequency
compensation
fixed-frequency oscillator, Shutdown/Soft-start, output error
flag and flag delay.
The LM2593HV 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 7-lead TO-220 package with several
different lead bend options, and a 7-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
current limit for the output switch and an over temperature
shutdown for complete protection under fault conditions.
Typical Application
SIMPLE SWITCHER
®
, improved line and load specifications,
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-
DS101333
®
Power Converter 150 kHz 2A
Features
n 3.3V, 5V, and adjustable output versions
n Adjustable version output voltage range, 1.2V to 57V
n Guaranteed 2A output load current
n Available in 7-pin TO-220 and TO-263 (surface mount)
n Input voltage range up to 60V
n 150 kHz fixed frequency internal oscillator
n Shutdown/Soft-start
n Out of regulation error flag
n Error flag delay
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
Note:
Package
±
4% max over line and load conditions
Patent Number 5,382,918.
Q
typically 90 µA
10133301
December 2001
www.national.com

Related parts for LM2593HVEVAL

LM2593HVEVAL Summary of contents

Page 1

... Typical Application (Fixed Output Voltage Versions) SIMPLE SWITCHER ® and Switchers Made Simple ® are registered trademarks of National Semiconductor Corporation. © 2001 National Semiconductor Corporation Power Converter 150 kHz 2A ® Features n 3.3V, 5V, and adjustable output versions n Adjustable version output voltage range, 1.2V to 57V ± ...

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 ( /SS Pin Input Voltage (Note 2) Delay Pin Voltage (Note 2) Flag Pin Voltage Feedback Pin Voltage Output Voltage to Ground (Steady State) ...

Page 3

LM2593HV-ADJ Electrical Characteristics Specifications with standard type face are for T ture Range. Symbol Parameter Efficiency V = 12V All Output Voltage Versions Electrical Characteristics Specifications with standard type face are for T ture Range. Unless otherwise specified, ...

Page 4

All Output Voltage Versions Electrical Characteristics Specifications with standard type face are for T ture Range. Unless otherwise specified, V Symbol Parameter FLAG/DELAY CONTROL Test Circuit of Figure 1 Regulator Dropout Detector Threshold Voltage VF Flag Output Saturation SAT Voltage ...

Page 5

Typical Performance Characteristics Normalized Output Voltage 10133302 Switch Saturation Voltage 10133305 Operating Quiescent Current 10133308 (Circuit of Figure 1 ) Line Regulation 10133303 Switch Current Limit 10133306 Shutdown Quiescent Current 10133309 5 Efficiency 10133304 Dropout Voltage 10133307 Minimum Operating Supply ...

Page 6

Typical Performance Characteristics Feedback Pin Bias Current 10133311 Soft-start 10133314 Soft-start Response 10133318 www.national.com (Circuit of Figure 1 ) (Continued) Flag Saturation Voltage 10133312 Shutdown /Soft-start Current 10133315 Shutdown/Soft-start Threshold Voltage Internal Gain-Phase Characteristics 10133353 6 Switching Frequency 10133313 Delay ...

Page 7

Typical Performance Characteristics Continuous Mode Switching Waveforms V = 20V 5V OUT LOAD µ 220 µF, C OUT OUT Horizontal Time Base: 2 µs/div. A: Output Pin Voltage, 10V/div. B: Inductor ...

Page 8

Test Circuit and Layout Guidelines Component Values shown are for V = 15V 5V 2A. 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

PIN FUNCTIONS (Continued) Note If any of the above three features (Shutdown /Soft-start, Error Flag, or Delay) are not used, the respective pins can be left open. www.national.com FIGURE 2. Soft-Start, Delay, Error Output 10 10133331 ...

Page 11

INDUCTOR VALUE SELECTION GUIDES (For Continuous Mode Operation) FIGURE 3. Timing Diagram for 5V Output FIGURE 4. LM2593HV-3.3 11 10133332 10133365 www.national.com ...

Page 12

INDUCTOR VALUE SELECTION GUIDES www.national.com (For Continuous Mode Operation) (Continued) FIGURE 5. LM2593HV-5.0 FIGURE 6. LM2593HV-ADJ 12 10133366 10133367 ...

Page 13

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) FIGURE 8. Contact Information for Suggested Inductor Manufacturers (For Continuous Mode Operation) (Continued) FIGURE 7. ...

Page 14

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 4 to Figure ...

Page 15

Application Information Therefore, looking at Figure 4 we quick-select a 47µH/2A inductor (designed for 150 kHz operation) for this applica- tion should confirm that it is rated to handle 200 µJ (see Figure the procedure ...

Page 16

Application Information FIGURE 9. Typical Circuit Using Shutdown /Soft-start and Error Flag Features FIGURE 10. Inverting −5V Regulator With Shutdown and Soft-start lNVERTING REGULATOR The circuit in Figure 10 converts a positive input voltage to a negative output voltage with ...

Page 17

Application Information suming 100% efficiency, which is never so. Therefore expect additional 10-20% higher than calculated from PEAK the above equation. The reader is also referred to Application Note AN-1157 for examples based on positive to ...

Page 18

Application Information on the regulated positive output for the charge pump to work correctly. Also, resistor R1 is required to limit the charging current some value less than the LM2593HV current limit. FIGURE 14. Charge Pump for ...

Page 19

Application Information FIGURE 15. Junction Temperature Rise, TO-263 Layout Suggestions As in any switching regulator, layout is very important. Rap- idly switching currents associated with wiring inductance can generate voltage transients which can cause problems. For minimal inductance and ground ...

Page 20

Physical Dimensions unless otherwise noted Order Number LM2593HVT-3.3, LM2593HVT-5.0 or LM2593HVT-ADJ www.national.com inches (millimeters) 7-Lead TO-220 Bent and Staggered Package NS Package Number TA07B 20 ...

Page 21

... 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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