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MFG:NSC  Package Cooled:SOT-23  D/C:04+  

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Part Number: LM2612

 

MFG: NSC

Package Cooled: SOT-23

D/C: 04+

Description: The LM2612 step-down DC-DC converter is optimized for powering ultra-low voltage circuits from a single Lithium-Ion cel...


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LM2612 General Description


The LM2612 step-down DC-DC converter is optimized for powering ultra-low voltage circuits from a single Lithium-Ion cell. It provides up to 400mA (300mA for B grade), over an input voltage range of 2.8V to 5.5V. Pin programmable out-put voltages of 1.05V, 1.3V, 1.5V or 1.8V allow adjustment for MPU voltage options without board redesign or external feedback resistors.

The device has three pin-selectable modes for maximizing battery life in mobile phones and similar portable applica-tions. Low-noise PWM mode offers 600kHz fixed-frequency operation to reduce interference in RF and data acquisition applications during full-power operation. In PWM mode, in-ternal synchronous rectification provides high efficiency (91% typ. at 1.8VOUT). A SYNC input allows synchronizing the switching frequency in a range of 500kHz to 1MHz to avoid noise from intermodulation with system frequencies. Low-current hysteretic PFM mode reduces quiescent current to 150 µA (typ.) during system standby. Shutdown mode turns the device off and reduces battery consumption to 0.1µA (typ.). Additional features include soft start and current overload protection.

The LM2612 is available in a 10 pin micro SMD packge. This package uses National's wafer level chip-scale micro SMD technology and offers the smallest possible size. Only three
small external surface-mount components, an inductor and two ceramic capacitors are required.

LM2612 Maximum Ratings

If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/Distributors for availability and specifications.
PVIN, VDD, to SGND                        −0.2V to +6V
PGND to SGND                             −0.2V to +0.2V
EN, SYNC/MODE, VID0, VID1 to
SGND                                              −0.2V to +6V
FB, SW                                         (GND −0.2V) to
                                                         (VDD +0.2V)
Storage Temperature Range     −45˚C to +150˚C

LM2612 Features

 Sub-miniature 10-pin micro SMD package
Only three tiny surface-mount external components required
Uses small ceramic capacitors.
Internal soft start
Current overload protection
No external compensation required

LM2612 Typical Application

 Mobile Phones
Hand-Held Radios
Battery Powered Devices

LM2612 Connection Diagram

LM2612 Connection Diagram

LM2612 datasheet

LM2612
PDF/DataSheet Download

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