LM2575T-5.0 National Semiconductor, LM2575T-5.0 Datasheet
![Voltage Regulator IC](/photos/18/98/189891/4243351_sml.jpg)
LM2575T-5.0
Manufacturer Part Number
LM2575T-5.0
Description
Voltage Regulator IC
Manufacturer
National Semiconductor
Specifications of LM2575T-5.0
Input Voltage
40V
Output Current
1A
Output Voltage
5V
No. Of Outputs
1
No. Of Pins
5
Operating Temperature Range
-40°C To +125°C
Termination Type
Through Hole
Mounting Type
Through Hole
Dc
0848
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
LM2575T-5.0
Manufacturer:
HTC
Quantity:
10 213
Part Number:
LM2575T-5.0
Manufacturer:
NS/国半
Quantity:
20 000
Company:
Part Number:
LM2575T-5.0/NOPB
Manufacturer:
NS
Quantity:
9 999
Part Number:
LM2575T-5.0/NOPB
Manufacturer:
TI/德州仪器
Quantity:
20 000
Part Number:
LM2575T-5.0/PB
Manufacturer:
NS/国半
Quantity:
20 000
© 1999 National Semiconductor Corporation
LM1575/LM2575/LM2575HV Series
SIMPLE SWITCHER
General Description
The LM2575 series of regulators are monolithic integrated
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 devices are avail-
able in fixed output voltages of 3.3V, 5V, 12V, 15V, and an
adjustable output version.
Requiring a minimum number of external components, these
regulators are simple to use and include internal frequency
compensation and a fixed-frequency oscillator.
The LM2575 series offers a high-efficiency replacement for
popular three-terminal linear regulators. It substantially re-
duces the size of the heat sink, and in many cases no heat
sink is required.
A standard series of inductors optimized for use with the
LM2575 are available from several different manufacturers.
This feature greatly simplifies the design of switch-mode
power supplies.
Other features include a guaranteed
put voltage within specified input voltages and output load
conditions, and
shutdown is included, featuring 50 µA (typical) standby cur-
rent. The output switch includes cycle-by-cycle current limit-
ing, as well as thermal shutdown for full protection under
fault conditions.
Typical Application
Note: Pin numbers are for the TO-220 package.
SIMPLE SWITCHER
®
is a registered trademark of National Semiconductor Corporation.
±
10% on the oscillator frequency. External
(Fixed Output Voltage Versions)
±
4% tolerance on out-
DS011475
®
1A Step-Down Voltage Regulator
Features
n 3.3V, 5V, 12V, 15V, and adjustable output versions
n Adjustable version output voltage range,
n Guaranteed 1A output current
n Wide input voltage range, 40V up to 60V for HV version
n Requires only 4 external components
n 52 kHz fixed frequency internal oscillator
n TTL shutdown capability, low power standby mode
n High efficiency
n Uses readily available standard inductors
n Thermal shutdown and current limit protection
n P
Applications
n Simple high-efficiency step-down (buck) regulator
n Efficient pre-regualtor for linear regulators
n On-card switching regulators
n Positive to negative converter (Buck-Boost)
+
1.23V to 37V (57V for HV version)
line and load conditions
Product Enhancement tested
DS011475-1
±
4% max over
www.national.com
May 1999