LM2576SX-5.0 National Semiconductor, LM2576SX-5.0 Datasheet - Page 13
LM2576SX-5.0
Manufacturer Part Number
LM2576SX-5.0
Description
IC,SMPS CONTROLLER,VOLTAGE-MODE,BIPOLAR,SIP,5PIN,PLASTIC
Manufacturer
National Semiconductor
Datasheets
1.LM2576SX-5.0.pdf
(24 pages)
2.LM2576SX-5.0.pdf
(24 pages)
3.LM2576SX-5.0.pdf
(22 pages)
Specifications of LM2576SX-5.0
Rohs Compliant
NO
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
LM2576SX-5.0
Manufacturer:
NS
Quantity:
9 999
Part Number:
LM2576SX-5.0
Manufacturer:
TOPCHIPS
Quantity:
20 000
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 =
www.national.com