7805 Datasheet – 5V, Voltage Regulator

This is one of the TTL IC types.

Part Number : 7805, LM7805

Function : 5V, Voltage Regulator

Package : TO-220 Type

Manufacturers : National Semiconductor

This post explains for the Voltage Regulator.

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7805 transistor ttl

Description :

This 7805 series of fixed-voltage integrated-circuit voltage regulators is designed for a wide range of applications. These applications include on-card regulation for elimination of noise and distribution problems associated with single-point regulation. Each of these regulators can deliver up to 1.5 A of output current. The internal current-limiting and thermal-shutdown features of these regulators essentially make them immune to overload.

In addition to use as fixed-voltage regulators, these devices can be used with external components to obtain adjustable output voltages and currents, and also can be used as the power-pass element in precision regulators.

7805 Pinout

7805 Pinout

Features

1. Output current in excess of 1A
2. Internal thermal overload protection
3. No external components required
4. Output transistor safe area protection
5. Internal short circuit current limit

 

 

7805 Datasheet schematic

 

Other data sheets within the file : 7812, 7815, LM7805, LM7812, LM7815

7805 Datasheet PDF

7805 pdf

BQ25A Equivalent – Battery SMBus Charge Controller – TI

Part Number : BQ24725A, Marking : BQ25A

Description : 1-4 Cell Li+ Battery SMBus Charge Controller

Package : 20-pin 3.5 × 3.5 mm2 VQFN Type

Manufactures : Texas Instruments

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BQ25A Battery Charger Controller IC

 

Description

The bq24725A ( Marking : BQ25A ) is a high-efficiency, synchronous battery charger, offering low component count for space-constraint, multi-chemistry battery charging applications.

The bq24725A utilizes two charge pumps to separately drive n-channel MOSFETs (ACFET, RBFET and BATFET) for automatic system power source selection.

SMBus controlled input current, charge current, and charge voltage DACs allow for very high regulation accuracies that can be easily programmed by the system power management micro-controller.

The bq24725A uses internal input current register or external ILIM pin to throttle down PWM modulation to reduce the charge current.

 

Pinout

BQ25A datasheet pinout
Features

1. SMBus Host-Controlled NMOS-NMOS Synchronous Buck Converter with Programmable 615kHz, 750kHz, and 885kHz Switching Frequencies

2. Automatic N-channel MOSFET Selection of System Power Source from Adapter or Battery Driven by Internal Charge Pumps

3. Enhanced Safety Features for Over Voltage Protection, Over Current Protection, Battery, Inductor and MOSFET Short Circuit Protection

 

Marking Information

BQ25A Packaging Information

 

Official Homepage : http://www.ti.com/product/BQ24725A

 

BQ25A Equivalent