LM2575HVT-5.0 National Semiconductor, LM2575HVT-5.0 Datasheet
LM2575HVT-5.0
Manufacturer Part Number
LM2575HVT-5.0
Description
DC/DC Converter IC
Manufacturer
National Semiconductor
Specifications of LM2575HVT-5.0
Input Voltage
60V
Output Voltage
5V
No. Of Pins
5
Termination Type
Through Hole
Mounting Type
Through Hole
Output Current Max
1A
Peak Reflow Compatible (260 C)
No
Supply Voltage Max
60V
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
LM2575HVT-5.0
Manufacturer:
NS
Quantity:
500
Part Number:
LM2575HVT-5.0
Manufacturer:
NS/国半
Quantity:
20 000
© 2007 National Semiconductor Corporation
LM1575/LM2575/LM2575HV
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 pow-
er supplies.
Other features include a guaranteed ±4% tolerance on output
voltage within specified input voltages and output load con-
ditions, and ±10% on the oscillator frequency. External shut-
down is included, featuring 50 μA (typical) standby current.
The output switch includes cycle-by-cycle current limiting, as
well as thermal shutdown for full protection under fault con-
ditions.
Typical Application
(Fixed Output Voltage Versions)
Note: Pin numbers are for the TO-220 package.
SIMPLE SWITCHER
®
is a registered trademark of National Semiconductor Corporation
11475
®
1A Step-Down Voltage Regulator
Features
■
■
■
■
■
■
■
■
■
■
■
Applications
■
■
■
■
3.3V, 5V, 12V, 15V, and adjustable output versions
Adjustable version output voltage range,
Guaranteed 1A output current
Wide input voltage range, 40V up to 60V for HV version
Requires only 4 external components
52 kHz fixed frequency internal oscillator
TTL shutdown capability, low power standby mode
High efficiency
Uses readily available standard inductors
Thermal shutdown and current limit protection
P
Simple high-efficiency step-down (buck) regulator
Efficient pre-regulator for linear regulators
On-card switching regulators
Positive to negative converter (Buck-Boost)
+
1.23V to 37V (57V for HV version) ±4% max over
line and load conditions
Product Enhancement tested
1147501
www.national.com
April 2007