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LM350 Voltage Regulator: Pinout, Datasheet, Equivalent

Author: Mia Date: 12 Apr 2021  178

lm350 datasheet

LM350 is a 3A DC adjustable power supply, high-performance voltage regulator.

 

This blog will cover the pinout, feature, equivalent, circuit diagram of LM350 voltage regulator, also including where and how to use this device, etc.


Catalog

LM350 Description

LM350 Pinout

LM350 Features

LM350 Parameter

LM350 Equivalent

LM350 Circuit

Where to use LM350

How to use LM350

LM350 Package

LM350 Application

LM350 Manufacturer

Component Datasheet


LM350 Description

The LM350 is an adaptable positive voltage regulator. There are three terminals: Vin, Vout, and Adj. This type of regulator is used to provide an additional 3 amps of current across an output range. This IC is extremely simple to use and only requires two external resistors to set the output voltage.

 

In advance, it employs internal current limiting, safe area compensation, thermal shutdown, and so on. This regulator is used in many applications, including local and on-card regulation. We can use this regulator to design a programmable o/p regulator, an adjustable switching regulator, or a precision current regulator by using a fixed resistor between the two pins like adjustment & output.


LM350 Pinout

LM350 voltage regulator LM350 voltage regulator pinout
LM350 voltage regulator LM350 voltage regulator pinout

 

Pin Number Pin Name Description
1 Adjust This pins adjusts the output voltage
2 Output Voltage (Vout) The regulated output voltage set by the adjust pin can be obtained from this pin
3 Input Voltage (Vin) The input voltage which has to be regulated is given to this pin

LM350 Features

  • Delivers an output current of 3 Amps.

  • Output voltage is adjustable from 1.25V to 33V with 1% tolerance.

  • Provides a load regulation of 0.1% and a line regulation of 0.005%/V.

  • The chip can bear maximum input to an output voltage difference of 35V. For normal operation, it should be 15 volts.

  • It provides thermal regulation against overloads. The overload protection protects the chip and keeps performing its operation even if the adjust terminal is not connected or

  • Provides floating operation in high voltage applications.

  • It has built-in protection which protects the chip when the current exceeds beyond the rating by tripping the device.

  • Very high dissipation of around 85 watts.


LM350 Parameter

Manufacturer: Texas Instruments
Series: -
Packaging: Tube
Part Status: Active
Output Configuration: Positive
Output Type: Adjustable
Number of Regulators: 1
Voltage - Input (Max): 35V
Voltage - Output (Min/Fixed): 1.25V
Voltage - Output (Max): 33V
Voltage Dropout (Max): -
Current - Output: 3A
PSRR: 86dB ~ 65dB (120Hz)
Control Features: -
Protection Features: Over Current Over Temperature Short Circuit
Operating Temperature: 0°C ~ 125°C
Mounting Type: Through Hole
Package / Case: TO-220-3
Supplier Device Package: TO-220-3
Base Part Number: LM350

LM350 Equivalent

LM350 Alternative Voltage Regulators: LM7805, LM7806, LM7809, LM7812, LM7905, LM7912, LM117V33, XC6206P332MR.

LM350 Equivalent Voltage Regulators: LM317, LT1086, LM1117 (SMD), PB137, LM337 (Negative Variable Voltage regulator)


LM350 Circuit

The LM350 IC's circuit diagram is shown below. A three-terminal integrated circuit is what it is. This regulator can be found in a variety of applications. It can also function as a variable voltage regulator.

LM350 CircuitLM350 Circuit Diagram

We've already mensioned this IC has three pins, one of which is connected to the Vin pin, which receives the input voltage. A potential divider is then used to fix a voltage at the adjust pin. A voltage divider can be formed using a pair of resistors in this case. As a result, the output voltage can be determined using the Vout pin. The circuit's pair of resistors can be connected to Vout.

 

A potentiometer is used to fix variable voltages at pin-1 within the potential divider to make this IC look like a variable voltage regulator. The potential difference can be created by connecting resistor R1 and the potentiometer at the adjusting pin, which controls the Vout pin according to the formula:

 

VOUT = 1.25 × (1 + (R2/R1)) + Iadj(R2)


Where to use LM350

This regulator would be the first choice for variable voltage regulation requirements. Because this IC can supply up to 3A, we can use the LM350 IC if we need to supply more than 1.5A. A variable voltage regulator is used to fix the voltage between 1.25V and 33V and to supply current up to 3A.

 

This regulator is an excellent choice for a variety of applications. This regulator also includes a current regulator, which is used in battery charging applications.


How to use LM350

The majority of voltage regulators employ an input and output capacitor. The operation of the LM350 is similar to that of other voltage regulators. You can adjust the values of the resistors connected between the adjustable and output pins to change the output voltage from 1.25V to 33V. The output capacitor enhances regulation as well as transient response. This device provides excellent load regulation. To achieve good regulation, the resistor R1 should be directly connected to the output to maximize performance.


LM350 Package

LM350 Package


LM350 Application

  • Battery chargers

  • Current Limited chargers

  • Switching Regulators

  • Temperature Controllers

  • Light Controller

  • Tracking Pre-regulator


LM350 Manufacturer

Texas Instruments Incorporated (TI) is a global semiconductor design and manufacturing company that develops analog ICs and embedded processors. By employing the world's brightest minds, TI creates innovations that shape the future of technology. TI is helping more than 100,000 customers transform the future, today.


Component Datasheet

LM350 Datasheet

Ordering & Quality

Photo Mfr. Part # Company Description Package PDF Qty Pricing
(USD)
LM350AT LM350AT Company:Texas Instruments Remark:Linear Voltage Regulator IC Output 3A TO-220-3 Package:TO-220-3
N/A
In Stock:On Order
Inquiry
Price:
1+: $4.60000
10+: $4.13500
25+: $3.90920
100+: $3.38780
250+: $3.21408
500+: $2.88398
1000+: $2.45850
Inquiry
LM350AT-NOPB LM350AT-NOPB Company:Texas Instruments Remark:Linear Voltage Regulator IC Output 3A TO-220-3 Package:TO-220-3
N/A
In Stock:On Order
Inquiry
Price:
1+: $3.29000
10+: $2.95200
25+: $2.79040
100+: $2.41840
250+: $2.29436
500+: $2.05874
1000+: $1.75500
Inquiry
LM350K LM350K Company:STMicroelectronics Remark:Linear Voltage Regulator IC 1 Output 3A TO-3 Package:TO-204AA, TO-3
N/A
In Stock:On Order
Inquiry
Price:
Call
Inquiry
LM350K-STEEL-NOPB LM350K-STEEL-NOPB Company:Texas Instruments Remark:IC REG LINEAR POS ADJ 3A TO3-2 Package:TO-204AA, TO-3
DataSheet
In Stock:378
Inquiry
Price:
1+: $61.43000
10+: $57.71100
25+: $55.84960
100+: $50.26460
250+: $48.40292
500+: $46.16892
1000+: $45.79659
Inquiry
LM350T-NOPB LM350T-NOPB Company:Texas Instruments Remark:IC REG LINEAR POS ADJ 3A TO220-3 Package:TO-220-3
DataSheet
In Stock:5460
Inquiry
Price:
1+: $1.82000
10+: $1.63200
25+: $1.54000
100+: $1.23200
250+: $1.07800
500+: $1.04720
1000+: $0.83160
2500+: $0.80080
5000+: $0.77000
Inquiry

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