LM2614

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LM2614 Description

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LM2614 Datasheet (PDF)

LM2614 Price & Availability

LM2614 Features

• Sub-miniature 10-bump thin micro SMD package
• Uses small ceramic capacitors
• 5mV typ PWM mode output voltage ripple(C_OUT = 22µF)
• Internal soft start
• Current overload protection
• Thermal Shutdown
• External compensation

LM2614 Description

The LM2614 DC-DC converter is optimized for powering RF power amplifiers (PAs) from a single Lithium-Ion cell. It steps down an input voltage of 2.8V to 5.5V to an output of 1.0V to 3.6V at up to 400mA (300mA for B grade). Output voltage is set using an analog input to VCON in the application circuit.

The device offers three modes for mobile phones and similar RF PA applications. Fixed-frequency PWM mode minimizes RF interference. A SYNC input allows synchronizing the switching frequency in a range of 500kHz to 1MHz. Low current hysteretic PFM mode reduces quiescent current to 160µA (typ.). Shutdown mode turns the device off and reduces battery consumption to 0.02µA (typ.).

Current limit and thermal shutdown features protect the device and system during fault conditions.

The LM2614 is available in a 10 bump micro SMD package. This packaging uses National's chip-scale micro SMD technology and offers the smallest possible size. A high switching frequency (600kHz) allows use of tiny surface-mount components.

The LM2614 can be dynamically controlled for output voltage changes from 1.0V to 3.6V in <30µs. The device features external compensation to tailor the response to a wide range of operating conditions.

LM2614 Parameters

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