DatasheetCafe

Part Number: LM317M

Function: 500 mA, Adjustable Output, Positive Voltage Regulator

Package: TO-220AB, SOT-223, DPAK

Manufacturer: ON Semiconductor

Image and Pinouts:

Description:

This LM317M is an adjustable three−terminal positive voltage regulator capable of supplying in excess of 500 mA over an output voltage range of 1.2 V to 37 V. This voltage regulator is exceptionally easy to use and requires only two external resistors to set the output voltage. Further, it employs internal current limiting, thermal shutdown and safe area compensation, making it essentially blow−out proof.

The LM317 serves a wide variety of applications including local, on−card regulation. This device also makes an especially simple adjustable switching regulator, a programmable output regulator, or by connecting a fixed resistor between the adjustment and output, the LM317M can be used as a precision current regulator.

Features:

1. Output Current in Excess of 500 mA

2. Output Adjustable between 1.2 V and 37 V

3. Internal Thermal Overload Protection

4. Internal Short Circuit Current Limiting

5. Output Transistor Safe−Area Compensation

6. Floating Operation for High Voltage Applications

7. Eliminates Stocking Many Fixed Voltages

Other data sheets are available within the file:

LM317MABDTG, LM317MABDTRKG, LM317MABTG, LM317MADTRKG

LM317M Datasheet PDF Download

Part Number: LM2575, LM2575TADJ, LM2575T-5.0

Function: 52kHz, Simple 1A, Step-Down Voltage Regulator

Package: TO-220-5 Pin, DIP 16 Pin

Manufacturer: National Semiconductor, Micrel Semicondcutor

Image

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.

Pinouts:

Features:

1. 3.3V, 5V, 12V, 15V, and adjustable output versions

2. Adjustable version output voltage range, 1.23V to 37V (57V for HV version) ±4% max over line and load conditions

3. Guaranteed 1A output current

4. Wide input voltage range, 40V up to 60V for HV version

5. Requires only 4 external components

6. 52 kHz fixed frequency internal oscillator

7. TTL shutdown capability, low power standby mode

8. High efficiency

9. Uses readily available standard inductors

Applications:

1. Simple high-efficiency step-down (buck) regulator

2. Efficient pre-regulator for linear regulators

3. On-card switching regulators

4. Positive to negative converter (Buck-Boost)

Other data sheets are available within the file: LM2575BN, LM2575BT, LM2575BU, 2575-3.3BT

LM2575 Datasheet PDF Download