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Details, datasheet, quote on part number:LM2575N-ADJ
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| Part: | LM2575N-ADJ |
| Category: | Power Management => Regulators => Switching Regulators |
| Description: | LM2575 - Simple Switcher 1A Step-down Voltage Regulator, Package: Soic Wide, Pin Nb=24 |
| Company: | National Semiconductor Corporation |
| Datasheet: | Download LM2575N-ADJ datasheet File size : 659 kB |
| Request For quote: | Find where to buy LM2575N-ADJ
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Datasheet text preview:
LM1575/LM2575/LM2575HV Series SIMPLE SWITCHER 1A Step-Down Voltage Regulator
May 1999
LM1575/LM2575/LM2575HV SIMPLE SWITCHER ® 1A Step-Down Voltage Regulator
General Description
The LM2575 series of regulators are monolithic integrated circuits that provide all the active functions for a step-down (buck) switching regulator, capable of driving a 1A load with excellent line and load regulation. These devices are available in fixed output voltages of 3.3V, 5V, 12V, 15V, and an adjustable output version. Requiring a minimum number of external components, these regulators are simple to use and include internal frequency compensation and a fixed-frequency oscillator. The LM2575 series offers a high-efficiency replacement for popular three-terminal linear regulators. It substantially reduces the size of the heat sink, and in many cases no heat sink is required. A standard series of inductors optimized for use with the LM2575 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 50 µA (typical) standby current. The output switch includes cycle-by-cycle current limiting, as well as thermal shutdown for full protection under fault conditions.
Features
n 3.3V, 5V, 12V, 15V, and adjustable output versions n Adjustable version output voltage range, 1.23V to 37V (57V for HV version) ± 4% max over line and load conditions n Guaranteed 1A output current n Wide input voltage range, 40V up to 60V for HV version n Requires only 4 external components n 52 kHz fixed frequency internal oscillator n TTL shutdown capability, low power standby mode n High efficiency n Uses readily available standard inductors n Thermal shutdown and current limit protection n P+ Product Enhancement tested
Applications
n n n n Simple high-efficiency step-down (buck) regulator Efficient pre-regualtor for linear regulators On-card switching regulators Positive to negative converter (Buck-Boost)
Typical Application
Versions)
(Fixed Output Voltage
01147501
Note: Pin numbers are for the TO-220 package.
SIMPLE SWITCHER ® is a registered trademark of National Semiconductor Corporation.
© 2001 National Semiconductor Corporation
DS011475
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LM1575/LM2575/LM2575HV
Block Diagram and Typical Application
01147502
3.3V, R2 = 1.7k 5V, R2 = 3.1k 12V, R2 = 8.84k 15V, R2 = 11.3k For ADJ. Version R1 = Open, R2 = 0 Note: Pin numbers are for the TO-220 package.
FIGURE 1.
Connection Diagrams
number.) Straight Leads 5 Lead TO-22 (T)
(XX indicates output voltage option. See Ordering Information table for complete part Bent, Staggered Leads 5-Lead TO-220 (T)
01147522
01147523
01147524
Top View LM2575T-XX or LM2575HVT-XX See NS Package Number T05A
Top View
Side View LM2575T-XX Flow LB03 or LM2575HVT-XX Flow LB03 See NS Package Number T05D 24-Lead Surface Mount (M)
16 Lead DIP (N or J)
01147525
Top View LM2575N-XX or LM2575HVN-XX See NS Package Number N16A LM1575J-XX-QML See NS Package Number J16A
*No Internal Connection
01147526
Top View LM2575M-XX or LM2575HVM-XX See NS Package Number M24B
*No Internal Connection
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LM1575/LM2575/LM2575HV
Connection Diagrams
number.) (Continued)
(XX indicates output voltage option. See Ordering Information table for complete part
TO-263(S) 5-Lead Surface-Mount Package
01147529
Top View
01147530
Side View LM2575S-XX or LM2575HVS-XX See NS Package Number TS5B
Ordering Information
Package Type 5-Lead TO-220 Straight Leads NSC Package Number T05A Standard Voltage Rating (40V) LM2575T-3.3 LM2575T-5.0 LM2575T-12 LM2575T-15 LM2575T-ADJ 5-Lead TO-220 Bent and Staggered Leads T05D LM2575T-3.3 Flow LB03 LM2575T-5.0 Flow LB03 LM2575T-12 Flow LB03 LM2575T-15 Flow LB03 LM2575T-ADJ Flow LB03 16-Pin Molded DIP N16A LM2575N-5.0 LM2575N-12 LM2575N-15 LM2575N-ADJ 24-Pin Surface Mount M24B LM2575M-5.0 LM2575M-12 LM2575M-15 LM2575M-ADJ 5-Lead TO-236 Surface Mount TS5B LM2575S-3.3 LM2575S-5.0 LM2575S-12 LM2575S-15 LM2575S-ADJ 16-Pin Ceramic DIP J16A LM1575J-3.3-QML LM1575J-5.0-QML LM1575J-12-QML LM1575J-15-QML LM1575J-ADJ-QML -55°C TJ +150°C High Voltage Rating (60V) LM2575HVT-3.3 LM2575HVT-5.0 LM2575HVT-12 LM2575HVT-15 LM2575HVT-ADJ LM2575HVT-3.3 Flow LB03 LM2575HVT-5.0 Flow LB03 LM2575HVT-12 Flow LB03 LM2575HVT-15 Flow LB03 LM2575HVT-ADJ Flow LB03 LM2575HVN-5.0 LM2575HVN-12 LM2575HVN-15 LM2575HVN-ADJ LM2575HVM-5.0 LM2575HVM-12 LM2575HVM-15 LM2575HVM-ADJ LM2575HVS-3.3 LM2575HVS-5.0 LM2575HVS-12 LM2575HVS-15 LM2575HVS-ADJ -40°C TJ +125°C Temperature Range
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LM1575/LM2575/LM2575HV
Absolute Maximum Ratings
(Note 1)
Minimum ESD Rating (C = 100 pF, R = 1.5 k) Lead Temperature (Soldering, 10 sec.) 260°C 2 kV
If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Maximum Supply Voltage LM1575/LM2575 LM2575HV ON /OFF Pin Input Voltage Output Voltage to Ground (Steady State) Power Dissipation Storage Temperature Range Maximum Junction Temperature -1V Internally Limited -65°C to +150°C 150°C 45V 63V -0.3V V +VIN
Operating Ratings
Temperature Range LM1575 LM2575/LM2575HV Supply Voltage LM1575/LM2575 LM2575HV 40V 60V -55°C TJ +150°C -40°C TJ +125°C
LM1575-3.3, LM2575-3.3, LM2575HV-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 Typ LM1575-3.3 Limit (Note 2) SYSTEM PARAMETERS (Note 4) Test Circuit Figure 2 VOUT Output Voltage VIN = 12V, ILOAD = 0.2A Circuit of Figure 2 VOUT Output Voltage LM1575/LM2575 VOUT Output Voltage LM2575HV Efficiency 4.75V VIN 40V, 0.2A ILOAD 1A Circuit of Figure 2 4.75V VIN 60V, 0.2A ILOAD 1A Circuit of Figure 2 VIN = 12V, ILOAD = 1A 75 3.3 3.200/3.168 3.416/3.450 3.168/3.135 3.450/3.482 3.3 3.200/3.168 3.400/3.432 3.168/3.135 3.432/3.465 3.3 3.267 3.333 3.234 3.366 V V(Min) V(Max) V V(Min) V(Max) V V(Min) V(Max) % Units (Limits) LM2575HV-3.3 Limit (Note 3) LM2575-3.3
LM1575-5.0, LM2575-5.0, LM2575HV-5.0 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 Typ LM1575-5.0 Limit (Note 2) SYSTEM PARAMETERS (Note 4) Test Circuit Figure 2 VOUT Output Voltage VIN = 12V, ILOAD = 0.2A Circuit of Figure 2 VOUT Output Voltage LM1575/LM2575 VOUT Output Voltage LM2575HV 0.2A ILOAD 1A, 8V VIN 40V Circuit of Figure 2 0.2A ILOAD 1A, 8V VIN 60V 5.0 4.850/4.800 4.800/4.750 5.0 4.850/4.800 5.150/5.200 4.800/4.750 5.200/5.250 5.0 4.950 5.050 4.900 5.100 V V(Min) V(Max) V V(Min) V(Max) V V(Min) LM2575-5.0 LM2575HV-5.0 Limit (Note 3) Units (Limits)
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LM1575/LM2575/LM2575HV
LM1575-5.0, LM2575-5.0, LM2575HV-5.0 Electrical Characteristics (Continued)
Specifications with standard type face are for TJ = 25°C, and those with boldface type apply over full Operating Temperature Range. Symbol Parameter Conditions Typ LM1575-5.0 Limit (Note 2) Circuit of Figure 2 Efficiency VIN = 12V, ILOAD = 1A 77 5.175/5.225 LM2575-5.0 LM2575HV-5.0 Limit (Note 3) 5.225/5.275 V(Max) % Units (Limits)
LM1575-12, LM2575-12, LM2575HV-12 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 Typ LM1575-12 Limit (Note 2) SYSTEM PARAMETERS (Note 4) Test Circuit Figure 2 VOUT Output Voltage VIN = 25V, ILOAD = 0.2A Circuit of Figure 2 VOUT Output Voltage LM1575/LM2575 VOUT Output Voltage LM2575HV Efficiency 0.2A ILOAD 1A, 15V VIN 40V Circuit of Figure 2 0.2A ILOAD 1A, 15V VIN 60V Circuit of Figure 2 VIN = 15V, ILOAD = 1A 88 12 11.64/11.52 12.42/12.54 11.52/11.40 12.54/12.66 12 11.64/11.52 12.36/12.48 11.52/11.40 12.48/12.60 12 11.88 12.12 11.76 12.24 V V(Min) V(Max) V V(Min) V(Max) V V(Min) V(Max) % LM2575-12 LM2575HV-12 Limit (Note 3) Units (Limits)
LM1575-15, LM2575-15, LM2575HV-15 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 Typ LM1575-15 Limit (Note 2) SYSTEM PARAMETERS (Note 4) Test Circuit Figure 2 VOUT Output Voltage VIN = 30V, ILOAD = 0.2A Circuit of Figure 2 VOUT Output Voltage LM1575/LM2575 VOUT Output Voltage LM2575HV Efficiency 0.2A ILOAD 1A, 18V VIN 40V Circuit of Figure 2 0.2A ILOAD 1A, 18V VIN 60V Circuit of Figure 2 VIN = 18V, ILOAD = 1A 88 15 14.55/14.40 15.525/15.675 14.40/14.25 15.68/15.83 15 14.55/14.40 15.45/15.60 14.40/14.25 15.60/15.75 15 14.85 15.15 14.70 15.30 V V(Min) V(Max) V V(Min) V(Max) V V(Min) V(Max) % LM2575-15 LM2575HV-15 Limit (Note 3) Units (Limits)
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