LTC3615EUF#TRPBF

LTC3615 is dual 3A synchronous stepdown regulator using a current mode, constant-frequency architecture. The DC supply current is only 130µA (burst mode operation at no-load) while maintaining the output voltages, dropping to zero current in shutdown. 100% duty cycle capability provides low dropout operation, which extends operating time in battery-operated systems. The operating frequency is externally programmable up to 4MHz, allowing the use of small surface mount inductors. 0°, 90°, or 180° of phase shift between the two channels can be selected to minimize input current ripple and output voltage ripple in a dual 3A or single 6A output configuration. The internal synchronous switches increase efficiency and eliminate the need for external catch diodes, saving external components and board space. Application includes point-of-load supplies, distributed power supplies, portable computer systems, DDR memory termination and handheld devices.

• Programmable slew rate limiting reduces EMI, and external synchronization can be applied up to 4MHz
• 2.25V to 5.5V input supply range makes the part ideally suited for single Li-Ion applications
• High efficiency up to 94%, dual outputs with 2 × 3A output current capability
• Low output ripple burst mode operation: IQ = 130µA
• ±1% output voltage accuracy, output voltages down to 0.6V
• Programmable slew rate at switch pins, low dropout operation, 100% duty cycle
• Shutdown current of ≤1µA, adjustable switching frequency up to 4MHz, internal/external compensation
• Selectable pulse-skipping/forced continuous/burst mode operation with adjustable burst clamp
• Fixed internal and programmable external soft-start, accurate start-up tracking capability
• 24-lead plastic QFN package, -40°C to 125°C temperature range

附註

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