36V, 2A(IOUT), 500kHz Step-Down DC/DC Converter in 3mm × 3mm DFN
Linear Technology Corporation announces the LT1912, a 2A, 36V step-down switching regulator packaged in a 3mm × 3mm DFN (or MSOP-10E). The LT1912s 3.6V to 36V input voltage range makes it ideal for load dump and cold-crank conditions found in automotive applications. Its 3.2A internal switch can deliver up to 2A of continuous output current to voltages as low as 0.79V. Switching frequency is user-programmable from 200kHz to 500kHz, optimizing efficiency while keeping external components small. The combination of its 3mm × 3mm DFN-10 package (or thermally enhanced MSOP-10E) and tiny externals provide a very compact, thermally efficient footprint.
The LT1912 utilizes a high efficiency 3.2A, 0.25Ω switch, with the necessary boost diode, oscillator, control and logic circuitry integrated on-chip. Special design techniques and a new high voltage process enable high efficiency over a wide input voltage range while the LT1912s current mode topology enables fast transient response and excellent loop stability. Other features include external synchronization (from 250kHz to 500kHz), a power good flag and soft-start capability.
The LT1912EDD and LT1912EMSE are priced starting at $2.95 each and $3.05 each, respectively, for 1,000-piece quantities. The LT1912IDD and LT1912IMSE, tested and guaranteed to operate from a –40°C to 125°C operating junction temperature, are priced at $3.54 and $3.66 each, respectively in 1,000-piece quantities. All versions are available from stock.
Summary of Features: LT1912
- Wide Input Range: Operation From 3.6V to 36V
- 2A Maximum Output Current
- Adjustable Switching Frequency: 200kHz to 500kHz
- Low Shutdown Current: ISD
- Integrated Boost Diode
- Synchronizable Between 250kHz to 500kHz
- Saturating Switch Design: 0.25Ω On-Resistance
- 0.790V Feedback Reference Voltage
- Output Voltage: 0.79V to 20V
- Soft-Start Capability
- Small 10-Pin Thermally Enhanced MSOP & 3mm × 3mm DFN Packages
36V, 2A (IOUT) Step-Down DC/DC Converter
Editor's Contact Information
- Doug Dickinson