LM2575SX-ADJ Integrated Circuit Chip LM1575/LM2575 SIMPLE SWITCHER 1A Step-Down Voltage Regulator
electronics ic chip
,integrated circuit components
LM1575/LM2575/LM2575HV SIMPLE SWITCHER® 1A Step-Down Voltage Regulator
FEATURES
- 3.3V, 5V, 12V, 15V, and Adjustable Output Versions
- Adjustable Version Output Voltage Range,
- 1.23V to 37V (57V for HV Version) ±4% Max Over
- Line and Load Conditions
- Specified 1A Output Current
- Wide Input Voltage Range, 40V up to 60V for HV Version
- Requires Only 4 External Components
- 52 kHz Fixed Frequency Internal Oscillator
- TTL Shutdown Capability, Low Power Standby Mode
- High Efficiency
- Uses Readily Available Standard Inductors
- Thermal Shutdown and Current Limit Protection
- P+ Product Enhancement Tested
APPLICATIONS
- Simple High-Efficiency Step-Down (Buck) Regulator
- Efficient Pre-Regulator for Linear Regulators
- On-Card Switching Regulators
- Positive to Negative Converter (Buck-Boost)
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 specified ±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.
ABSOLUTE MAXIMUM RATINGS (1)(2)(3)
| Maximum Supply Voltage | LM1575/LM2575 | 45V |
| LM2575HV | 63V | |
| ON /OFF Pin Input Voltage | −0.3V ≤ V ≤ +VIN | |
| Output Voltage to Ground | (Steady State) | −1V |
| Power Dissipation | Internally Limited | |
| Storage Temperature Range | −65°C to +150°C | |
| Maximum Junction Temperature | 150°C | |
| Minimum ESD Rating | (C = 100 pF, R = 1.5 kΩ) | 2 kV |
| Lead Temperature | (Soldering, 10 sec.) | 260°C |
(1) Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is intended to be functional, but do not ensure specific performance limits.
(2) If Military/Aerospace specified devices are required, please contact the TI Sales Office/ Distributors for availability and specifications.
(3) Refer to RETS LM1575J for current revision of military RETS/SMD.
Typical Application
(Fixed Output Voltage Versions)
Pin numbers are for the TO-220 package.
Block Diagram and Typical Application
3.3V, R2 = 1.7k
5V, R2 = 3.1k
12V, R2 = 8.84k
15V, R2 = 11.3k
For ADJ. Version
R1 = Open, R2 = 0Ω
Pin numbers are for the TO-220 package.
TPS5401DGQR adjustable 0.5A Step Down Regulator SWIFT™ 42V Input Step Down Transformer
TL431BCDBZTG4 NEW AND ORIGINAL STOCK
TLV431ACDBZR NEW AND ORIGINAL STOCK
TLV62565DBVR NEW AND ORIGINAL STOCK
BQ24721CRHBR Electronic IC Chip NEW AND ORIGINAL STOCK
BQ24061DRCR Electronic IC Chip NEW AND ORIGINAL STOCK
DRV8824PWPR Flash Memory IC NEW AND ORIGINAL STOCK
LM2937ES-10 500mA Low Dropout Regulator DDPAK Semiconductor
REF02AU Power Management IC Vref Series 5V Precision Voltage Reference
TPS767D318PWPR 350mV SSOP28 Low Dropout Voltage Regulators
| Image | Part # | Description | |
|---|---|---|---|
|
|
TPS5401DGQR adjustable 0.5A Step Down Regulator SWIFT™ 42V Input Step Down Transformer |
Buck Switching Regulator IC Positive Adjustable 0.8V 1 Output 500mA 10-PowerTFSOP, 10-MSOP (0.118", 3.00mm Width)
|
|
|
|
TL431BCDBZTG4 NEW AND ORIGINAL STOCK |
Shunt Voltage Reference IC Adjustable 2.495V 36 VV ±0.5% 100 mA SOT-23-3
|
|
|
|
TLV431ACDBZR NEW AND ORIGINAL STOCK |
Shunt Voltage Reference IC Adjustable 1.24V 6 VV ±1% 15 mA SOT-23-3
|
|
|
|
TLV62565DBVR NEW AND ORIGINAL STOCK |
Buck Switching Regulator IC Positive Adjustable 0.6V 1 Output 1.5A SC-74A, SOT-753
|
|
|
|
BQ24721CRHBR Electronic IC Chip NEW AND ORIGINAL STOCK |
Charger IC Multi-Chemistry 32-VQFN (5x5)
|
|
|
|
BQ24061DRCR Electronic IC Chip NEW AND ORIGINAL STOCK |
Charger IC Lithium Ion/Polymer 10-VSON (3x3)
|
|
|
|
DRV8824PWPR Flash Memory IC NEW AND ORIGINAL STOCK |
Bipolar Motor Driver Power MOSFET Logic 28-HTSSOP
|
|
|
|
LM2937ES-10 500mA Low Dropout Regulator DDPAK Semiconductor |
Linear Voltage Regulator IC Positive Fixed 1 Output 500mA DDPAK/TO-263-3
|
|
|
|
REF02AU Power Management IC Vref Series 5V Precision Voltage Reference |
Series Voltage Reference IC Fixed 5V V ±0.3% 21 mA 8-SOIC
|
|
|
|
TPS767D318PWPR 350mV SSOP28 Low Dropout Voltage Regulators |
Linear Voltage Regulator IC Positive Fixed 2 Output 1A 28-HTSSOP
|