IC REG SIMPLE SWITCHER TO-220-5

LM2576T-ADJ/NOPB

Manufacturer Part NumberLM2576T-ADJ/NOPB
DescriptionIC REG SIMPLE SWITCHER TO-220-5
ManufacturerNational Semiconductor
SeriesSIMPLE SWITCHER®
TypeStep-Down (Buck)
LM2576T-ADJ/NOPB datasheets
 


Specifications of LM2576T-ADJ/NOPB

Internal Switch(s)YesSynchronous RectifierNo
Number Of Outputs1Voltage - Output1.23 ~ 37 V
Current - Output3AFrequency - Switching52kHz
Voltage - Input4 ~ 40 VOperating Temperature-40°C ~ 125°C
Mounting TypeThrough HolePackage / CaseTO-220-5 (Straight Leads)
Current, Input Bias50 nACurrent, Output3 A
Current, Supply5 mAFrequency, Oscillator52 kHz
Package TypeTO-220Regulator TypeBuck (Step-Down)
Resistance, Thermal, Junction To Case2 °C/WTemperature, Operating, Range-40 to +125 °C
Voltage, Input40 VVoltage, Output1.23 to 37 V
Lead Free Status / RoHS StatusLead free / RoHS CompliantPower - Output-
Other names*LM2576T-ADJ
*LM2576T-ADJ/NOPB
LM2576T-ADJNS
  
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V
R
20V
1N5820
MBR320P
SR302
30V
1N5821
MBR330
31DQ03
SR303
40V
1N5822
MBR340
31DQ04
SR304
50V
MBR350
31DQ05
SR305
60V
MBR360
DQ06
SR306
Inductor
Inductor
Code
Value
L47
L68
L100
L150
L220
L330
L470
L680
H150
H220
H330
H470
H680
H1000
H1500
H2200
Note 12: Schott Corporation, (612) 475-1173, 1000 Parkers Lake Road, Wayzata, MN 55391.
Note 13: Pulse Engineering, (619) 674-8100, P.O. Box 12235, San Diego, CA 92112.
Note 14: Renco Electronics Incorporated, (516) 586-5566, 60 Jeffryn Blvd. East, Deer Park, NY 11729.
FIGURE 9. Inductor Selection by Manufacturer’s Part Number
Application Hints
INPUT CAPACITOR (C
)
IN
To maintain stability, the regulator input pin must be by-
passed with at least a 100 µF electrolytic capacitor. The
capacitor’s leads must be kept short, and located near the
regulator.
Schottky
Fast Recovery
3A
4A–6A
3A
1N5823
50WQ03
1N5824
The following
diodes are all
MBR340
rated to 100V
50WQ04
1N5825
31DF1
HER302
50WQ05
50WR06
50SQ060
FIGURE 8. Diode Selection Guide
Schott
(Note 12)
47 µH
671 26980
68 µH
671 26990
100 µH
671 27000
150 µH
671 27010
220 µH
671 27020
330 µH
671 27030
470 µH
671 27040
680 µH
671 27050
150 µH
671 27060
220 µH
671 27070
330 µH
671 27080
470 µH
671 27090
680 µH
671 27100
1000 µH
671 27110
1500 µH
671 27120
2200 µH
671 27130
If the operating temperature range includes temperatures
below −25˚C, the input capacitor value may need to be
larger. With most electrolytic capacitors, the capacitance
value decreases and the ESR increases with lower tempera-
tures and age. Paralleling a ceramic or solid tantalum ca-
pacitor will increase the regulator stability at cold tempera-
tures. For maximum capacitor operating lifetime, the
capacitor’s RMS ripple current rating should be greater than
15
4A–6A
The following
diodes are all
rated to 100V
50WF10
MUR410
HER602
Pulse Eng.
Renco
(Note 13)
(Note 14)
PE-53112
RL2442
PE-92114
RL2443
PE-92108
RL2444
PE-53113
RL1954
PE-52626
RL1953
PE-52627
RL1952
PE-53114
RL1951
PE-52629
RL1950
PE-53115
RL2445
PE-53116
RL2446
PE-53117
RL2447
PE-53118
RL1961
PE-53119
RL1960
PE-53120
RL1959
PE-53121
RL1958
PE-53122
RL2448
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