The LTC3872EDDB is a constant frequency current mode boost DC/DC controller that drives an N-channel power MOSFET and requires very few external components. The No RSENSE™ architecture eliminates the need for a sense resistor, improves efficiency and saves board space.
The LTC3872EDDB provides excellent AC and DC load and line regulation with ±1.5% output voltage accuracy. It incorporates an undervoltage lockout feature that shuts down the device when the input voltage falls below 2.3V.
High switching frequency of 550kHz allows the use of a small inductor. The LTC3872EDDB is available in an 8-lead low profile (1mm) ThinSOT™ package and 8-pin 2mm × 3mm DFN package.
LTC3872LTC3872-1Frequency Foldback In Current LimitYesNoFeature
- No Current Sense Resistor Required
- VOUT up to 60V
- Constant Frequency 550kHz Operation
- Internal Soft-Start and Optional External Soft-Start
- Adjustable Current Limit
- Pulse Skipping at Light Load
- VIN Range: 2.75V to 9.8V
- ±1.5% Voltage Reference Accuracy
- Current Mode Operation for Excellent Line and Load Transient Response
- Low Profile (1mm) SOT-23 and 2mm × 3mm DFN Packages
Applications
- Telecom Power Supplies
- 42V Automotive Systems
- 24V Industrial Controls
- IP Phone Power Supplies
(Picture: Pinout)
