LM2612BL

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
Thermal shutdown protection


Application

 Mobile Phones
 Hand-Held Radios
 Battery Powered Devices


Pinout




Specifications

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


Description

The LM2612BL 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 LM2612BL 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 160 µA (typ.) during system standby. Shutdown mode turns the device off and reduces battery consumption to 0.02µA (typ.). Additional features include soft start and cur-rent overload protection.

The LM2612BL 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.