LTC3612EUDC#PBF

LTC3612 is a low quiescent current monolithic synchronous buck regulator using a current mode, constant frequency architecture. The no-load DC supply current in sleep mode is only 70µA while maintaining the output voltage (burst mode operation) at no load, dropping to zero current in shutdown. 100% duty cycle capability provides low dropout operation, extending the operating time in battery-powered systems. The operating frequency is externally programmable up to 4MHz, allowing the use of small surface mount inductors. For switching noise-sensitive applications, It can be synchronized to an external clock at up to 4MHz. Forced continuous mode operation in LTC3612 reduces noise and RF interference. Internal synchronous switch increases efficiency and eliminates the need for an external catch diode, saving external components and board space. Applications include point-of-load supplies, distributed power supplies, portable computer systems, DDR memory termination and handheld devices.

• Adjustable compensation allows transient response to optimized over wide range loads, O/P capacitors
• 3A output current, 2.25V to 5.5V input voltage range
• Low output ripple burst mode operation: IQ = 70µA, ±1% output voltage accuracy
• Output voltage down to 0.6V, high efficiency up to 95%
• Low dropout operation, 100% duty cycle, shutdown current of ≤1µA
• Optional active voltage positioning (AVP) with internal compensation
• Selectable pulse-skipping/forced continuous/burst mode operation with adjustable burst clamp
• Programmable soft-start, inputs for start-up tracking or external reference
• DDR memory mode (IOUT = ±1.5A)
• 20-lead plastic QFN package, -40°C to 125°C temperature range

Notes

ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party