Product category:
Power Supply ICs and Controllers
News Release from: Texas Instruments (April 2001-March 2006) | Subject: TPS6220x and TPS6104x
Edited by the Electronicstalk Editorial
Team on 21 March 2002
Top efficiency for monolithic DC/DC
convertors
Texas Instruments has two new families of high-efficiency, low-power DC/DC convertors it says offer the industry's highest efficiency in a small-footprint SOT23 package.
Texas Instruments has two new families of high-efficiency, low-power DC/DC convertors it says offer the industry's highest efficiency in a small-footprint SOT23 package Single-cell Li-ion operation makes both families of devices well suited for use in PDAs, pocket PCs, cell phones, smart phones, digital cameras, media players and other portable applications The TPS6220x family of synchronous step-down convertors provides up to 300mA of output current with a fixed switching frequency of 1MHz
This article was originally published on Electronicstalk on 8 Nov 2004 at 8.00am (UK)
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Power efficiency ratings up to 95% make the TPS6220x devices more efficient than competing switching power supplies and nearly twice as efficient as the low-dropout linear regulators frequently used in portable applications.
These step-down convertors feature a new dynamic voltage mode control scheme that provides superior regulation under heavy loads.
Designers can use only a single 10uF output capacitor, reducing system cost and space.
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In addition, the control scheme and a no-load quiescent current of only 15uA enable operation at high efficiencies over the entire load current range, extending the standby time of portable products.
TPS6220x family offers fixed output voltages ranging from 1.5 to 3.3V and an adjustable output voltage from 0.7 to 6V.
Input voltages, ranging from 2.5 to 6.0V, can be supplied by a single Li-ion cell, three NiMH or NiCd cells, or a standard 3.3 or 5V rail.
They are well suited as core voltage supplies for DSPs, microprocessors, microcontrollers, ASICs and FPGAs.
The TPS6104x family of high-frequency boost convertors generate an adjustable output voltage ranging up to 28V from an input of 1.8 to 6.0V.
The boost convertors provide up to 400mA of internal switch current with a switching frequency up to 1MHz.
Power efficiency of 85% minimises power loss through greater operating efficiency than other available boost convertors.
A no-load quiescent current of only 28uA and an optimised control scheme allow high-efficiency operation over the entire load current range.
The TPS6104x boost convertors are well suited for use in portable products that are powered by a single Li-ion cell or two or three NiMH, NiCd or alkaline cells.
They can be used for LCD bias supplies and white LED power supplies for LCD backlights, as well as standard up-conversion to 12V.
The TPS6220x family of synchronous step-down convertors and the TPS6104x family of boost convertors are now available from TI and its authorised distributors.
Both families are available in 5-pin SOT23 packages and are supported with evaluation modules.
Suggested resale pricing per unit in quantities of 1000 is $1.50 for TPS6220x devices and $0.95 for TPS6104x devices.
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