Charge Pump Doublers come in 2 x 2 mm DFN package.
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Press Release Summary:
Featuring 1.2 MHz constant frequency operation, Model LTC3204B-3.3 generates regulated boosted output voltage of 3.3 V from minimum input voltage of 1.8 V at output currents up to 50 mA, while Model LTC3205B-5 produces 5 V from minimum of 2.7 V input voltage at currents up to 150 mA. Both include automatic soft start circuitry to prevent excessive inrush current during startup, and are suited for applications that are sensitive to variable-frequency operation.
Original Press Release:
Low Noise Regulated 3.3V and 5V Charge Pump Doubler in 2mm x 2mm DFN Package
MILPITAS, CA - August 8, 2005 - Linear Technology Corporation announces the LTC3204B-3.3/5 charge pump doublers offered in the 2mm x 2mm DFN packages. Featuring low-noise constant-frequency (1.2MHz) operation, the LTC3204B-3.3 generates a regulated boosted output voltage of 3.3V from a minimum input voltage of 1.8V (2 AA cell alkaline or NiMH) at output currents up to 50mA, while the LTC3204B-5 produces a 5V output from a minimum 2.7V (Li-Ion battery) input voltage at currents up to 150mA.
The LTC3204B is ideal for applications sensitive to variable-frequency operation. The device's patented constant-frequency architecture ensures both low input and low output ripple, especially at light loads, to minimize switching noise. Other features include automatic soft start circuitry to prevent excessive inrush current during startup, load disconnect from the input during shutdown, plus current limit and thermal shutdown circuitry.
The LTC3204B's high switching frequency enables the use of tiny external ceramic capacitors, saving size and cost. Low external parts count of one flying capacitor and two bypass capacitors, in addition to the low profile DFN package, make the LTC3204B an extremely compact solution for space-constrained applications.
The LTC3204BEDC-3.3 and LTC3204BEDC-5 are available in the low-profile 6-lead DFN (2mm x 2mm x 0.75mm) package. 1,000-piece pricing starts at $1.50 each.
Summary of Features: LTC3204B
o Fixed Outputs:
- 3.3V for LTC3204-3.3
- 5V for LTC3204-5
o Output Currents:
- 50mA for LTC3204-3.3
- 150mA for LTC3204-5
o Wide VIN Ranges:
- 1.8V to 4.5V for LTC3204-3.3
- 2.7V to 5.5V for LTC3204-5
o Low Noise Constant Frequency (1.2MHz) Operation
o Low Input & Output Ripple
o Automatic Soft-Start Limits Inrush Current
o Low Shutdown Current <1uA
o Low Profile 6-Pin DFN (2mm x 2mm x 0.75mm) Package
Company Background
Linear Technology Corporation was founded in 1981 as a manufacturer of high performance linear integrated circuits. Linear Technology products include high performance amplifiers, comparators, voltage references, monolithic filters, linear regulators, DC-DC converters, battery chargers, data converters, communications interface circuits, RF signal conditioning circuits, and many other analog functions. Applications for Linear Technology's high performance circuits include telecommunications, cellular telephones, networking products such as optical switches, notebook and desktop computers, computer peripherals, video/multimedia, industrial instrumentation, security monitoring devices, high-end consumer products such as digital cameras and MP3 players, complex medical devices, automotive electronics, factory automation, process control, and military and space systems.
LT and LTC are registered trademarks of Linear Technology Corp.
North America and General Information
John Hamburger
Tel: (408) 432-1900 ext. 2419
jhamburger@linear.com
Doug Dickinson
Tel: (408) 432 1900 ext. 2233
ddickinson@linear.com
