DC/DC Converter suits space-constrained applications.
July 20, 2004 -
Model LT1935 is a 2 A, 40 V step-up converter in ThinSOT(TM) package. Input voltage of 2.3-16 V enables unit to operate from single-cell, Li-Ion batteries up to fixed 15 V input rails, delivering outputs up to 38 V. NPN switch achieves VCESAT of 180 mV at 2 A, independent of supply voltage. Constant 1.2 MHz switching frequency allows designers to keep switching noise out of noise-sensitive circuitry and enables use of tiny capacitors and inductors.
(Archive News Story - Products mentioned in this Archive News Story may or may not be available from the manufacturer.)
Original Press release
Linear Technology Corp.
1630 McCarthy Blvd.
Milpitas, CA, 95035
USA
1.2 MHz, 40 V Boost Converter Has 2 A Switch in a ThinSOT
MILPITAS, CA - July 15, 2004 - Linear Technology Corporation announces the LT1935, the industry's highest power SOT-23 switching regulator. The device is a 2A, 40V,1.2MHz step-up DC/DC converter in a ThinSOT(TM) package. Its wide 2.3V to 16V input voltage range enables the LT1935 to operate from single cell Li-Ion batteries up to fixed 15V input rails, delivering outputs up to 38V. Its constant 1.2MHz switching frequency allows designers to keep switching noise out of noise-sensitive circuitry and enables the use of tiny capacitors and inductors. The combination of the LT1935's high efficiency switch and tiny ThinSOT package provides high current boost capability in a very compact form factor, making it ideal for space-constrained applications.
The LT1935's NPN switch achieves a VCESAT of only 180mV at 2A, independent of supply voltage, resulting in high efficiency even at maximum power levels from a 3V input. The high voltage switch on the LT1935 is rated at 40V, making the device ideal for boost converters up to 38V, as well as for single-ended primary inductance converter (SEPIC) and flyback designs. The device can generate 5V at up to 1A from a 3.3V supply or 5V at 550mA from four alkaline cells in a SEPIC design. The LT1935 incorporates a soft-start function and is pin-to-pin compatible with both the LT1930 and LT1613.
The LT1935ES5 is available from stock in a ThinSOT package. Pricing starts at $2.44 each for 1,000-piece quantities.
Summary of Features: LT1935
2A, 40V Internal Switch
1.2MHz Switching Frequency
High Output Voltage: Up to 38V
Wide Input Range: 2.3V to 16V
Low VCESAT Switch: 180mV at 2A
Integrated Soft-Start
Uses Small Surface Mount Components
2V at 600mA from 5V Input
Low Shutdown Current: <1uA
Low Profile (1mm) SOT-23 (ThinSOT(TM)) 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.
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