550 kHz dual controller eliminates two separate DC/DC converters

22 November 2000 Power Electronics / Power Management

Linear Technology's LTC1874, a dual output current mode step-down DC-DC converter that includes two 550 kHz controllers in a small, narrow 16-lead SSOP, is claimed to reduce layout space by replacing the need for two DC-DC converters and allows the use of small inductors and capacitors. The input voltage range for each controller is 2,5 to 10 V with an output adjustable as low as 0,8 V. Each controller consumes only 270 µA but can deliver up to 5 A of load current. The IC's compact dual output voltage design is ideal for powering ASICs, microcontrollers and DSPs in applications ranging from telecom to portable devices.

The LTC1874 drives external P-channel MOSFETs and uses sense resistors to accurately deliver power to the load at up to 94% efficiency. Further, the use of P-channel MOSFETS also maximises the life of a battery source by allowing very low dropout operation. The IC provides +2,5% output voltage accuracy and is configured with Burst Mode operation, which enhances efficiency at low output current. Each controller has a separate shutdown pin allowing full control of each output voltage.

Insight

(021) 674 4103

Further reading:

40 W and 75 W railway DC/DC converter
Brabek Power Electronics / Power Management
RECOM has announced two new cost-efficient DC/DC converters for the rail market with an ultra-wide 11:1 input range to cover all nominal input voltages from 24 to 110 V DC.

Read more...

---

High-precision current transducer
Power Electronics / Power Management
Danisense announces its new high-precision DP12IP current transducer designed for isolated DC and AC current measurement in demanding PCB-mounted power electronics applications.

Read more...

---

Secure holder for protected 18650 batteries
Power Electronics / Power Management
Designed for protected 18650 batteries up to 70 mm long, the holder offers secure retention for portable, industrial, and embedded applications.

Read more...

---

More room to scale
Altron Arrow Power Electronics / Power Management
With the latest STM32H5 lines from STMicroelectronics, you can now scale within the same platform, from a compact 1 Mbyte device to higher-memory MCUs for graphics-rich and feature-heavy designs.

Read more...

---

Surface mount power amplifier for high-power applications
RF Design Power Electronics / Power Management
The GNA-63-5W+, from Mini-Circuits, is a GaN MMIC Power Amplifier (PA) designed for demanding RF applications requiring high efficiency, excellent linearity, and a compact footprint.

Read more...

---

1200 V QSiC modules
Power Electronics / Power Management
SemiQ Inc has launched the QSiC Dual3, a family of 1200 V half-bridge MOSFET modules for motor drives in data centre cooling systems, grid converters in energy storage systems, and industrial drivers.

Read more...

---

MCOTS transient filter for military applications
RFiber Solutions Power Electronics / Power Management
SynQor has announced the new MCOTS-F-28-T-HE transient half-brick filter, the latest addition to its MCOTS product family.

Read more...

---

Expanded range of high-thermal-performance QSiC modules
Power Electronics / Power Management
SemiQ’s half-bridge series for data centre power converters and industrial motor drives features low RDSON SiC MOSFETs and parallel SBD diodes for best-in-class power density and conversion efficiency.

Read more...

---

Transporting lithium batteries and IoT devices
Power Electronics / Power Management
With billions of rechargeable and non-rechargeable lithium cells and batteries powering most of the world’s consumer and industrial electronic devices, shipping them to customers through vast global logistics chains is often an overlooked topic.

Read more...

---

Setting a new benchmark for high-power DC load testing
Conical Technologies Test & Measurement Power Electronics / Power Management
The new ITECH IT8900G/L high-speed, high-power DC electronic load offers a powerful combination of speed, scalability, precision and high-power density.

Read more...

---