Product category:
Power Supply ICs and Controllers
News Release from: Texas Instruments (April 2001-March 2006) | Subject: TPS6050x
Edited by the Electronicstalk Editorial
Team on 21 November 2001
Inductorless step-down charge pumps save
batteries
A new family of step-down charge pumps from Texas Instruments brings power efficiency and ease of use to battery-operated systems and PC peripherals.
A new family of step-down charge pumps from Texas Instruments brings power efficiency and ease of use to battery-operated systems and PC peripherals With a high output drive and built-in protection features, the new TPS6050x charge pumps offer savings in board space and system cost
This article was originally published on Electronicstalk on 8 Nov 2004 at 8.00am (UK)
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They are the first step-down, or "buck", charge pumps to be introduced by TI.
The new TPS6050x step-down charge pumps offer regulated output voltages ranging from 0.8 to 3.3V to power low-voltage components in portable and bus-powered systems.
The input voltage range is 1.8 to 6.5V, enabling use with a variety of battery types.
Additionally, a low quiescent current of only 40uA allows longer standby times.
At 250mA, the family provides the highest output current in the industry and is capable of supporting multiple components within a system.
Finally, with the TPS6050x, only four small ceramic capacitors are required to build a complete high-efficiency charge pump power convertor, thereby saving board space and cost.
The TPS6050x step-down charge pumps offer operating efficiencies comparable to inductive buck converters, yet with the ease of use that is customary with linear regulators.
Peak efficiencies of 90% are achieved using a fractional conversion topology resulting in lower power dissipation and eliminating the need for heat sinking.
Supporting system flexibility, the devices can be powered by three or four nickel-cadmium (NiCad), nickel-metal-hydride (NiMH) or alkaline batteries, or by a single lithium-ion (Li-ion) cell.
Requiring few external capacitors and no inductors, TPS6050x charge pumps simplify design and allow for a complete convertor to be built in only 1cm2.
To prevent current leakage and prolong battery life, the load is isolated from the battery during shutdown.
Added protection features include a soft start to limit inrush current, a power good output voltage supervisor, overtemperature and overcurrent protection.
The TPS6050x step-down charge pumps are now available in a 10-pin MSOP package from TI and authorised distributors.
Suggested resale pricing is $1.35 each in quantities of 1000.
An evaluation module is available to help simplify system design and speed time to market.
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