LM2577T-ADJ/NOPB National Semiconductor, LM2577T-ADJ/NOPB Datasheet

IC REG SIMPLE SWITCHER TO-220-5

LM2577T-ADJ/NOPB

Manufacturer Part Number
LM2577T-ADJ/NOPB
Description
IC REG SIMPLE SWITCHER TO-220-5
Manufacturer
National Semiconductor
Series
SIMPLE SWITCHER®r
Type
Step-Up (Boost), Flyback, Forward Converterr
Datasheets

Specifications of LM2577T-ADJ/NOPB

Internal Switch(s)
Yes
Synchronous Rectifier
No
Number Of Outputs
1
Voltage - Output
11.4 ~ 12.6 V
Current - Output
3A
Frequency - Switching
52kHz
Voltage - Input
3.5 ~ 40 V
Operating Temperature
-40°C ~ 125°C
Mounting Type
Through Hole
Package / Case
TO-220-5 (Straight Leads)
Current, Input Bias
100 nA
Current, Output
3 A
Current, Supply
25 mA
Frequency, Oscillator
52 kHz
Package Type
TO-220
Regulation, Line
20 mV
Regulation, Load
20 mV
Regulator Type
Boost (Step-Up)
Resistance, Thermal, Junction To Case
2 °C/W
Temperature, Operating, Range
-40 to +125 °C
Transconductance
3700
Voltage, Gain
800 V/V
Voltage, Input
3.5 to 40 V
Dc To Dc Converter Type
Step Up
Pin Count
5 +Tab
Input Voltage
40V
Output Voltage
11.6 to 12.4V
Switching Freq
48 TO 56KHz
Output Current
3A
Efficiency
80%
Output Type
Adjustable
Switching Regulator
Yes
Load Regulation
50mV
Line Regulation
50mV
Mounting
Through Hole
Input Voltage (min)
3.5V
Operating Temperature Classification
Automotive
For Use With
551011367-061 - BOARD WEBENCH LM2577,LM2585/87
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Power - Output
-
Lead Free Status / Rohs Status
RoHS Compliant part Electrostatic Device
Other names
*LM2577T-ADJ
*LM2577T-ADJ/NOPB
LM2577T-ADJ

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
LM2577T-ADJ/NOPB
Manufacturer:
TOSHIBA
Quantity:
7 600
LM1577/LM2577
SIMPLE SWITCHER
General Description
The LM1577/LM2577 are monolithic integrated circuits that
provide all of the power and control functions for step-up
(boost), flyback, and forward converter switching regulators.
The device is available in three different output voltage
versions: 12V, 15V, and adjustable.
Requiring a minimum number of external components, these
regulators are cost effective, and simple to use. Listed in this
data sheet are a family of standard inductors and flyback
transformers designed to work with these switching regula-
tors.
Included on the chip is a 3.0A NPN switch and its associated
protection circuitry, consisting of current and thermal limiting,
and undervoltage lockout. Other features include a 52 kHz
fixed-frequency oscillator that requires no external compo-
nents, a soft start mode to reduce in-rush current during
start-up, and current mode control for improved rejection of
input voltage and output load transients.
Connection Diagrams
SIMPLE SWITCHER
Order Number LM2577T-12, LM2577T-15,
See NS Package Number T05A
®
is a registered trademark of National Semiconductor Corporation.
5-Lead TO-220 (T)
or LM2577T-ADJ
Straight Leads
Top View
®
Step-Up Voltage Regulator
01146804
Features
n Requires few external components
n NPN output switches 3.0A, can stand off 65V
n Wide input voltage range: 3.5V to 40V
n Current-mode operation for improved transient
n 52 kHz internal oscillator
n Soft-start function reduces in-rush current during start-up
n Output switch protected by current limit, under-voltage
Typical Applications
n Simple boost regulator
n Flyback and forward regulators
n Multiple-output regulator
Order Number LM2577T-12 Flow LB03, LM2577T-15
response, line regulation, and current limit
lockout, and thermal shutdown
Flow LB03, or LM2577T-ADJ Flow LB03
See NS Package Number T05D
Bent, Staggered Leads
5-Lead TO-220 (T)
Top View
01146805

Related parts for LM2577T-ADJ/NOPB

LM2577T-ADJ/NOPB Summary of contents

Page 1

... Output switch protected by current limit, under-voltage lockout, and thermal shutdown Typical Applications n Simple boost regulator n Flyback and forward regulators n Multiple-output regulator Bent, Staggered Leads 01146804 Order Number LM2577T-12 Flow LB03, LM2577T-15 Flow LB03, or LM2577T-ADJ Flow LB03 See NS Package Number T05D 5-Lead TO-220 (T) 01146805 Top View ...

Page 2

... Note: Pin numbers shown are for TO-220 (T) package. Output Voltage 12V 15V LM2577M-12 LM2577M-15 LM2577M-ADJ LM2577N-12 LM2577N-15 LM2577N-ADJ LM2577S-12 LM2577S-15 LM2577S-ADJ LM2577T-12 LM2577T-15 LM2577T-ADJ LM2577T-12 LM2577T-15 LM2577T-ADJ Flow LB03 Flow LB03 LM1577K-12/883LM1577K-15/883 3 NSC ADJ Package Package Drawing M24B SO N16A N TS5B TO-263 ...

Page 3

... Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage Output Switch Voltage Output Switch Current (Note 2) Power Dissipation Storage Temperature Range Lead Temperature (Soldering, 10 sec.) Maximum Junction Temperature Electrical Characteristics— ...

Page 4

Electrical Characteristics—LM1577-15, LM2577-15 Specifications with standard type face are for T Range. Unless otherwise specified, V Symbol Parameter DEVICE PARAMETERS NPN Switch Current Limit Electrical Characteristics—LM1577-ADJ, LM2577-ADJ Specifications with standard type face are for T Range. Unless otherwise specified, V ...

Page 5

Electrical Characteristics—LM1577-ADJ, LM2577-ADJ Specifications with standard type face are for T Range. Unless otherwise specified, V Symbol Parameter DEVICE PARAMETERS Error Amplifier Output Swing Error Amp Output Current I Soft Start Current SS D Maximum Duty Cycle ∆I / Switch ...

Page 6

... Physical Dimensions inches (millimeters) unless otherwise noted (Continued) Order Number LM2577N-12, LM2577N-15, or LM2577N-ADJ Order Number LM2577T-12, LM2577T-15, or LM2577T-ADJ Molded Dual-In-Line Package (N) NS Package Number N16A TO-220, Straight Leads (T) NS Package Number TO5A 28 ...

Page 7

... Physical Dimensions inches (millimeters) unless otherwise noted (Continued) Order Number LM2577T-12 Flow LB03, LM2577T-15 Flow LB03, or LM2577T-ADJ Flow LB03 TO-220, Bent Staggered Leads (T) NS Package Number T05D 29 ...

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