SN6505BDBVR

Description
The SN6505x is a low-noise, low-EMI push-pull transformer driver that was intended primarily for tiny form factor, isolated power supplies. It is powered by a 2.25 V to 5 V DC power source and drives low-profile, center-tapped transformers. Slew rate control of the output switch voltage and Spread Spectrum Clocking are used to achieve ultra-low noise and EMI (SSC).
The SN6505x is made up of an oscillator and a gate drive circuit that gives complementary output signals to ground-referenced N-channel power switches. To assure start-up under strong loads, the device features two 1-A Power-MOSFET switches.
The switching clock can also be supplied externally to allow for correct placement of switcher harmonics or when using numerous transformer drivers. Internal safeguards include 1.7 A current limiting, under-voltage lockout, thermal shutdown, and break-before-make circuits. With large load capacitors, the SN6505x offers a soft-start feature that prevents significant inrush current during power up.
The SN6505A has a 160 kHz internal oscillator for low-emission applications, while the SN6505B has a 420 kHz internal oscillator for improved efficiency and a smaller transformer footprint.
The SN6505x is packaged in a 6-pin SOT23/DBV package.
The device's operation is specified for temperatures ranging from –55°C to 125°C.  
Features
• Push-pull driver for transformers
• Wide input voltage range: 2.25 V to 5.5 V
• High output drive: 1 A at 5 V supply
• Low RON 0.25 Ω max at 4.5 V supply
• Ultra-low EMI
• Spread spectrum clocking
• Precision internal oscillator options: 160 kHz (SN6505A) and 420 kHz (SN6505B)
• Synchronization of multiple devices with external clock input
• Slew-rate control
• 1.7 A Current-limit
• Low shutdown current: <1 μA
•
Thermal shutdown
• Wide temperature range: –55°C to 125°C
• Small 6-Pin SOT23 (DBV) package
• Soft-start to reduce In-rush current   Applications
• Isolated power supply for CAN, RS-485, RS-422, RS-232, SPI, I2C, low-power LAN
• Low-noise isolated USB supplies
• Process control
• Telecom supplies
• Radio supplies
• Distributed supplies
• Medical instruments
• Precision instruments
• Low-noise filament supplie