LM3411M5X-3.3 National Semiconductor, LM3411M5X-3.3 Datasheet

no-image

LM3411M5X-3.3

Manufacturer Part Number
LM3411M5X-3.3
Description
Precision Secondary Regulator/Driver
Manufacturer
National Semiconductor
Datasheet

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
LM3411M5X-3.3
Manufacturer:
NS
Quantity:
150
Part Number:
LM3411M5X-3.3
Manufacturer:
NS/国半
Quantity:
20 000
© 1999 National Semiconductor Corporation
LM3411
Precision Secondary Regulator/Driver
General Description
The LM3411 is a low power fixed-voltage (3.3V or 5.0V) pre-
cision shunt regulator designed specifically for driving an op-
toisolator to provide feedback isolation in a switching regula-
tor.
The LM3411 circuitry includes an internally compensated op
amp, a bandgap reference, NPN output transistor, and volt-
age setting resistors.
A trimmed precision bandgap reference with temperature
drift curvature correction, provides a guaranteed 1% preci-
sion over the operating temperature range (A grade version).
The amplifier’s inverting input is externally accessible for
loop frequency compensation when used as part of a larger
servo system. The output is an open-emitter NPN transistor
capable of driving up to 15 mA of load current.
Because of its small die size, the LM3411 has been made
available in the sub-miniature 5-lead SOT23-5 surface
mount package. This package is ideal for use in space criti-
cal applications.
Although its main application is to provide a precision output
voltage (no trimming required) and maintain very good regu-
lation in isolated DC/DC converters, it can also be used with
Typical Application and Functional Diagram
SIMPLE SWITCHER
is a tradmark of National Semiconductor Corporation.
DS011987
Basic Isolated DC/DC Converter
LM3411 Functional Diagram
other types of voltage regulators or power semiconductors to
provide a precision output voltage without precision resistors
or trimming.
Features
n Fixed voltages of 3.3V and 5.0V with initial tolerance of
n Custom voltages available (3V–17V)
n Wide output current range, 20 µA–15 mA
n Low temperature coefficient
n Available in 5-lead SOT23-5 surface mount package
Applications
n Secondary controller for isolated DC/DC PWM switching
n Use with LDO regulator for high-precision fixed output
n Precision monitoring applications
n Use with many types of regulators to increase precision
±
(tape and reel)
regulators systems
regulators
and improve performance
1% for standard grade and
DS011987-2
DS011987-1
±
0.5% for A grade
December 1999
www.national.com

Related parts for LM3411M5X-3.3

LM3411M5X-3.3 Summary of contents

Page 1

... DC/DC converters, it can also be used with Typical Application and Functional Diagram SIMPLE SWITCHER ™ tradmark of National Semiconductor Corporation. © 1999 National Semiconductor Corporation DS011987 other types of voltage regulators or power semiconductors to provide a precision output voltage without precision resistors or trimming ...

Page 2

... Order Information Grade 3.3V A (Prime) LM3411AM5-3.3 3.3V A (Prime) LM3411AM5X-3.3 3.3V B (Standard) LM3411M5-3.3 3.3V B (Standard) LM3411M5X-3.3 5.0V A (Prime) LM3411AM5-5.0 5.0V A (Prime) LM3411AM5X-5.0 5.0V B (Standard) LM3411M5-5.0 5.0V B (Standard) LM3411M5X-5.0 FIGURE 1. SOT23-5 Marking and Order Information The first letter “D” identifies the part as a Driver, the next two numbers indicate the voltage, “00” for 3.3V part and “01” for a 5V part. The fourth letter indicates the grade, “ ...

Page 3

... Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Input Voltage V(IN) Output Current Junction Temperature Storage Temperature Lead Temperature Vapor Phase (60 sec.) Infrared (15 sec.) = 25˚C) (Note Power Dissipation ( LM3411-3.3 Electrical Characteristics Specifications with standard type face are for T ture Range ...

Page 4

LM3411-5.0 Electrical Characteristics Specifications with standard type face are for T ture Range. Unless otherwise specified, V(IN Symbol Parameter = Regulation Voltage I REG OUT = 5 mA Regulation Voltage I OUT Tolerance = 5 ...

Page 5

Typical Performance Characteristics Normalized Temperature Drift DS011987-30 Circuit Used for Bode Plots DS011987-8 Bold Plot DS011987-44 Circuit Used for Response Time DS011987-11 Quiescent Current DS011987-31 Bode Plot DS011987-33 Response Time for 3.3V Version = 0 pF DS011987-35 Response ...

Page 6

Typical Performance Characteristics Tempco of Internal Feedback Resistor (Rf) DS011987-39 Regulation Voltage vs Output Voltage and Load Resistance DS011987-42 www.national.com (Continued) Regulation Voltage Change vs Output Current DS011987-40 6 Regulation Voltage vs Output Voltage and Load Resistance DS011987-41 ...

Page 7

Product Description The LM3411 is a shunt regulator specifically designed to be the reference and control section in an overall feedback loop of a regulated power supply. The regulated output voltage is sensed between the IN pin and GROUND pin ...

Page 8

Applications Information FIGURE 3. Isolated 250 mA Flyback Switching Regulator FIGURE 4. Isolated 1.5A Flyback Switching Regulator Using a LM2577 The LM3411 regulator/driver provides the reference and feedback drive functions in a regulated power supply. It can also be used ...

Page 9

Applications Information (Continued) FIGURE 5. Precision 1A Buck Regulator FIGURE 6. Negative Input, Negative or Positive Output Flyback Regulator Improved output voltage tolerance and regulation specifica- tions are possible by combining the LM3411A with one of the SIMPLE SWITCHER buck ...

Page 10

Applications Information FIGURE 7. Precision 5V 1A Low Dropout Regulator FIGURE 8. 3.3V 0.5A Low Dropout Regulator The circuit in Figure 8 shows a 3.3V low dropout regulator using the LM3411-3.3 and several discrete components. FIGURE 9. Precision Positive Voltage ...

Page 11

Applications Information (Continued) FIGURE 10. Precision Negative Voltage Regulator FIGURE 11. Precision Negative Voltage Regulator with Accurate Current Limit A simple 5V supply monitor circuit is shown in Figure 12 . Us- ing the LM3411’s voltage reference, op-amp (as a ...

Page 12

Applications Information Schematic Diagram www.national.com (Continued) FIGURE 16. Overvoltage Crowbar 12 DS011987-28 DS011987-29 ...

Page 13

... 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 ...

Related keywords