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Part Number: LM2612BL
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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LM2612BL
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General Description
LM2612BL 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 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 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.
LM2612BL 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
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
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
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
LM2612BL Typical Application
Mobile Phones
Hand-Held Radios
Battery Powered Devices
Hand-Held Radios
Battery Powered Devices
LM2612BL Connection Diagram
LM2612BL
PDF/DataSheet Download
- Datasheet: LM2612BL
- File Size: 2374516 KB
- Manufacturer: NSC [National Semiconductor]
- Click here to Download
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LM2612
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....
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