Wide Input Range, No RSENSE Current Mode Boost, Flyback & SEPIC Controller Operates up to 175°C
Analog Devices, Inc., which recently acquired Linear Technology Corporation, announces the LTC1871X, a wide input range, current mode, boost, flyback or SEPIC controller that drives an N-channel power MOSFET and requires few external components. Intended for low to medium power applications, it eliminates the need for a current sense resistor by utilizing the power MOSFET’s on-resistance, thereby maximizing efficiency. The LTC1871X’s design is optimized for high temperature environments up to 175°C.
It’s 2.5V to 36V input voltage range is ideal for high temperature applications such as oil exploration drilling equipment with power sources ranging from 3V to 36V. The LTC1871X’s electrical parameters are 100% tested at 175°C, offering a VREF accuracy of ±2% over the entire –40°C to 175°C temperature range. The LTC1871X’s flexibility for use in boost, SEPIC or flyback topologies is ideal for a wide range of battery-powered applications commonly found in downhole drilling applications. The LTC1871X’s Burst Mode® operation offers low quiescent current, well suited for applications that require extended operating battery life. Specialized Cu/Ni/Au bond pad plating ensures long life in high temperature environments while a tiny MSOP-10 package offers a highly compact solution footprint.
The LTC1871XMS, offered in an MSOP-10 package, is priced at $125.00 each in 1,000-piece quantities and is available from stock. For more information, visit www.linear.com/product/LTC1871X.
Summary of Features: LTC1871X
- 100% Tested at 175°C
- ±2% Reference Accuracy Over –40°C to 175°C Range
- High Efficiency (No Sense Resistor Required)
- Wide Input Voltage Range: 2.5V to 36V
- Current Mode Control Provides Excellent Transient Response
- High Maximum Duty Cycle (92% Typ)
- ±2% RUN Pin Threshold with 100mV Hysteresis
- Micropower Shutdown: IQ = 10μA
- Programmable Operating Frequency (65kHz to 900kHz) with One External Resistor
- Synchronizable to an External Clock up to 1.3 × fOSC
- User-Controlled Pulse-Skipping or Burst Mode® Operation
- Internal 5.2V Low Dropout Voltage Regulator
- Output Overvoltage Protection
- Capable of Operating with a Sense Resistor for High Output Voltage Applications
- Small 10-Lead MSOP Package
Pricing shown is for budgetary use only and may differ due to local duties, taxes, fees and exchange rates.
- About Analog Devices
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Editor's Contact Information
- Doug Dickinson