LM2576T-15/NOPB National Semiconductor, LM2576T-15/NOPB Datasheet - Page 13
![IC REG SIMPLE SWITCHER TO-220-5](/photos/7/60/76069/pkg_t05a_drawing__14_sml.jpg)
LM2576T-15/NOPB
Manufacturer Part Number
LM2576T-15/NOPB
Description
IC REG SIMPLE SWITCHER TO-220-5
Manufacturer
National Semiconductor
Series
SIMPLE SWITCHER®r
Type
Step-Down (Buck)r
Datasheet
1.LM2576T-5.0NOPB.pdf
(24 pages)
Specifications of LM2576T-15/NOPB
Internal Switch(s)
Yes
Synchronous Rectifier
No
Number Of Outputs
1
Voltage - Output
15V
Current - Output
3A
Frequency - Switching
52kHz
Voltage - Input
4 ~ 40 V
Operating Temperature
-40°C ~ 125°C
Mounting Type
Through Hole
Package / Case
TO-220-5 (Straight Leads)
Input Voltage
40V
Output Current
3A
Output Voltage
15V
No. Of Pins
5
Operating Temperature Range
-40°C To +125°C
Msl
MSL 1 - Unlimited
Switching Frequency Max
52kHz
Filter Terminals
Through Hole
Rohs Compliant
Yes
Input Voltage Primary Max
40V
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Power - Output
-
Other names
*LM2576T-15
*LM2576T-15/NOPB
LM2576T-15
*LM2576T-15/NOPB
LM2576T-15
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
LM2576T-15/NOPB
Manufacturer:
TI/德州仪器
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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