LM2576SX-5.0/NOPB National Semiconductor, LM2576SX-5.0/NOPB Datasheet - Page 13
LM2576SX-5.0/NOPB
Manufacturer Part Number
LM2576SX-5.0/NOPB
Description
IC REG SW 5V 3A STP DN TO-263-5
Manufacturer
National Semiconductor
Series
SIMPLE SWITCHER®r
Type
Step-Down (Buck)r
Datasheet
1.LM2576T-5.0NOPB.pdf
(24 pages)
Specifications of LM2576SX-5.0/NOPB
Internal Switch(s)
Yes
Synchronous Rectifier
No
Number Of Outputs
1
Voltage - Output
5V
Current - Output
3A
Frequency - Switching
52kHz
Voltage - Input
4 ~ 40 V
Operating Temperature
-40°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
D²Pak, TO-263 (5 leads + tab)
Package
6TO-263
Minimum Input Voltage
4 V
Maximum Input Voltage
40 V
Switching Frequency
58 KHz
Operating Supply Voltage
4 to 40 V
Maximum Output Current
3 A
Output Type
Fixed
Output Voltage
5 V
Efficiency
77(Typ) %
Rohs Compliant
Yes
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Power - Output
-
Other names
*LM2576SX-5.0
*LM2576SX-5.0/NOPB
LM2576SX-5.0
*LM2576SX-5.0/NOPB
LM2576SX-5.0
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
LM2576SX-5.0/NOPB
Manufacturer:
NATIONAL
Quantity:
177
Part Number:
LM2576SX-5.0/NOPB
Manufacturer:
NS/国半
Quantity:
20 000
LM2576 Series Buck Regulator Design Procedure
Given: V
Maximum Input Voltage I
Current F = Switching Frequency (Fixed at 52 kHz)
1. Programming Output Voltage (Selecting R1 and R2,
as shown in Figure 2) Use the following formula to select
the appropriate resistor values.
coefficient and stability with time, use 1% metal film resis-
tors)
PROCEDURE (Adjustable Output Voltage Versions)
R
1
can be between 1k and 5k. (For best temperature
OUT
= Regulated Output Voltage V
LOAD
(Max) = Maximum Load
IN
(Max) =
FIGURE 7. LM2576(HV)-ADJ
13
Given: V
52 kHz
1. Programming Output Voltage (Selecting R1 and R2)
R
2
EXAMPLE (Adjustable Output Voltage Versions)
= 1k (8.13 − 1) = 7.13k, closest 1% value is 7.15k
OUT
= 10V V
(Continued)
01147613
IN
(Max) = 25V I
LOAD
(Max) = 3A F =
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