LM2576-3.3 Datasheet PDF - Silicon Link
| Part Number | LM2576-3.3 | |
| Description | SIMPLE SWITCHER 3A Step-Down Voltage Regulator | |
| Manufacturers | Silicon Link | |
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There is a preview and LM2576-3.3 download ( pdf file ) link at the bottom of this page. Total 12 Pages | ||
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SIMPLESWITCHER3A
Step-DownVoltageRegulator
LM2576Series
LM2576M-XX
LM2576MK-XX
LM2576M1K-XX
GENERAL DESCRIPTION
The LM2576, LM2576M series of regulators are monolithic
integrated circuits that provide all the active functions for a
step-down (buck) switching regulator, capable of driving 3A
load with excellent line and load regulation. These devices are
available in fixed output voltages of 3.3V, 5V, 12V, 15V (1.5V,
1.8V, 2.5V the LM2576M only) and adjustable output versions.
Requiring a minimum number of external components,
these regulators are simple to use and include internal
frequency compensation and a fixed-frequency oscillator.
The LM2576, LM2576M series offers a high-efficiency
replacement for popular three-terminal linear regulators. It
substantially reduces the size of the heat sink, and in some
cases no heat sink is required.
A standard series of inductors optimized for use with the
LM2576, LM2576M are available from several different
manufacturers. This feature greatly simplifies the design of
switch-mode power supplies.
Other features include a guaranteed ± 4% tolerance on
output voltage within specified input voltages and output load
conditions, and ±10% on the oscillator frequency. External
shutdown is included, featuring 50µA (typical) standby current.
The output switch includes cycle-by-cycle current limiting, as
well as thermal shutdown for full protection under fault
conditions.
FEATURES
1.5V, 1.8V, 2.5V, 3.3V, 5V, 12V, 15V and
adjustable output versions
Adjustable version output voltage range,
1.23V to 37V ± 4% max over line and load
conditions
Guaranteed 3A output current
Wide input voltage range, 40V
Requires only 4 external components
52 kHz fixed frequency oscillator
TTL shutdown capability, low power standby mode
High efficiency
Uses readily available standard inductors
Thermal shutdown and current limit protection
APPLICATIONS
Simple high-efficiency step-down (buck) regulator
Efficient pre-regulator for linear regulators
On-card switching regulators
Positive to negative converter (Buck-Boost)
TYPICAL APPLICATION (Fixed Output Voltage Versions)
7V - 40V
UNR(E6G0VULfoArTHEVD)
DDCCININPPUUTT
LM2576
FEEDBACK
+VIN LM2576M
4
1
LM2576MK OUTPUT
ULNMR2E5G76UML1AKTE 2
L1
+5V
REGULATED
+
CIN
3 GND 5 ON/OFF
100 H
+ COUT
D1
OUTPUT
3A LOAD
100 F
1N5822
1000 F
FIGURE 1.
Silicon Link Inc.
- 1 - June 2007 Rev. 0
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SIMPLESWITCHER3A
Step-DownVoltageRegulator
LM2576Series
LM2576M-XX
LM2576MK-XX
LM2576M1K-XX
LM2576-3.3, LM2576M-3.3, LM2576MK-3.3 LM2576M1K-3.3
Electrical Characteristics
Specifications with standard type face are for TJ = 25°C, and those with boldface type apply over full Operating
Temperature Range.
Symbol
Parameter
Conditions
SYSTEM PARAMETERS (Note 3) Test Circuit Figure 2
VOUT
Output Voltage
VIN =12V, ILOAD =0.5A
Circuit of Figure 2
VOUT
η
Output Voltage
Efficiency
6V ≤ VIN ≤ 40V, 0.5A ≤ ILOAD ≤ 3A
Circuit of Figure 2
VIN =12V, ILOAD =3A
Typ
Limit
(Note 2)
Units
(Limits)
V
3.3
3.234
V(Min)
3.366
V(Max)
V
3.3
3.168/3.135
V(Min)
3.432/3.465 V(Max)
75 %
LM2576-5.0, LM2576M-5.0, LM2576MK-5.0, LM2576M1K-5.0
Electrical Characteristics
Specifications with standard type face are for TJ = 25°C, and those with Figure 2 boldface type apply over full Operating
Temperature Range.
Symbol
Parameter
Conditions
SYSTEM PARAMETERS (Note 3) Test Circuit Figure 2
VOUT
Output Voltage
VIN =12V, ILOAD =0.5A
Circuit of Figure 2
VOUT
η
Output Voltage
Efficiency
0.5A ≤ ILOAD ≤ 3A,
8V ≤ VIN ≤ 40V
Circuit of Figure 2
VIN =12V, ILOAD =3A
Typ
Limit
(Note 2)
Units
(Limits)
V
5.0
4.900
V(Min)
5.100
V(Max)
V
5.0 4.800/4.750 V(Min)
5.200/5.250 V(Max)
77 %
Silicon Link Inc.
- 5 - June 2007 Rev. 0
Preview 5 Page |
Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for LM2576-3.3 electronic component. |
| Information | Total 12 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ LM2576-3.3.PDF Datasheet ] | |
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