1,5 A step-down switching regulator has only 100 µA quiescent current

Power Electronics / Power Management

8 October 2003 Power Electronics / Power Management

Linear Technology's LT1976EFE is a high voltage step-down switching regulator with Burst Mode operation that keeps quiescent current under 100 µA.

The LT1976 operates within a V(IN) range of 3,3 to 60 V, making it ideal for load dump or cold-crank conditions in automotive applications. Its 1,5 A internal switch can deliver up to 1,25 A of continuous output current to voltages as low as 1,25 V.

The LT1976 is Linear Technology's first high voltage switching regulator to offer Burst Mode operation. Its ultra-low quiescent current is well suited to applications such as automotive systems, which demand always-on systems and optimum battery life. The combination of its thermally enhanced TSSOP package and 200 kHz switching frequency keeps external inductors and capacitors small, providing a very compact footprint.

The LT1976 uses a high efficiency 60 V, 1,5 A, 0,2 Ω switch with the necessary oscillator, control and logic circuitry integrated into a single die. Special design techniques and a new high voltage process enable high efficiency over a wide input voltage range, while its current mode topology enables fast transient response and superior loop stability. Efficiency is optimised over a wide output current range by employing Burst Mode operation at low currents, using the output to bias the internal circuitry and a supply boost capacitor to fully saturate the power switch. Additional features include a power good flag with programmable threshold and time-out, as well as soft-start capability and thermal shutdown.

For more information contact Memec SA, 011 897 8600.

Share this article:

Solving South African power problems with locally built intelligence
Editor's Choice Power Electronics / Power Management
Smart metering infrastructure in South Africa remains patchy. The rollout has been slow, coverage is inconsistent, and for the most part, granular per-unit measurement simply does not exist.

Read more...

Wide range power module
Power Electronics / Power Management
The latest DC-DC modules from Würth Elektronik are characterised by high resilience to voltage transients on the 24 V bus and an extremely wide input-voltage range from 3,5 V to 38 V.

Read more...

Selecting primary batteries for maximum service life
Uniross Batteries Power Electronics / Power Management
Primary batteries play an important role in IoT applications. Designed for longevity, they have a high-energy capacity and are often used in standalone applications where charging is impractical or impossible.

Read more...

4 kW e-mobility DC-DC converter
Brabek Power Electronics / Power Management
The RECOM RMOD4000 series of compact, plug-and-play DC-DC converters is a cost-effective solution to provide isolated 14 V, 28 V, or 56 V DC network rails from a high input voltage between 180 and 950 V DC.

Read more...

Aluminium case upgrade boosts performance
Vepac Electronics Power Electronics / Power Management
The SQBF Quarter Brick 300 W DC to DC Converter is now available in a newly upgraded metal case designed to deliver improved durability and superior electrical performance across demanding applications.

Read more...

Extending the range of power converters
RS South Africa Power Electronics / Power Management
Power Integrations recently announced a breakthrough in flyback topology extending the power range of flyback converters to 440 W - well beyond the limits that traditionally required more complex resonant and LLC topologies.

Read more...

Power-dense modules operate up to 115 V DC
Brabek Power Electronics / Power Management
The RPMVH-0.5 series of cost-effective, non-isolated buck regulator modules from RECOM delivers 0,5A of output at fully regulated voltages up to 24 V DC.

Read more...

Categories

Power Electronics / Power Management

1,5 A step-down switching regulator has only 100 µA quiescent current

Further reading:

Publications by Technews