Datasheet
RoHS Compliance Information
| Size in Kbytes | Date |
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| LM2727/LM2737 N-Channel FET Synchronous Buck Regulator Controller for Low Output Voltages |
602
Kbytes |
16-Jun-03 |
Download |
LM2727/LM2737 N-Channel FET Synchronous Buck Regulator Controller for Low Output Voltages (Japanese)
 |
331 Kbytes |
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Package Availability, Models, Samples & Pricing
General Description
The LM2727 and LM2737 are high-speed, synchronous, switching regulator controllers. They are intended to control currents of 0.7A to 20A with up to 95% conversion efficiencies. The LM2727 employs output over-voltage and under-voltage latch-off. For applications where latch-off is not desired, the LM2737 can be used. Power up and down sequencing is achieved with the power-good flag, adjustable soft-start and output enable features. The LM2737 and LM2737 operate from a low-current 5V bias and can convert from a 2.2V to 16V power rail. Both parts utilize a fixed-frequency, voltage-mode, PWM control architecture and the switching frequency is adjustable from 50kHz to 2MHz by adjusting the value of an external resistor. Current limit is achieved by monitoring the voltage drop across the on-resistance of the low-side MOSFET, which enhances low duty-cycle operation. The wide range of operating frequencies gives the power supply designer the flexibility to fine-tune component size, cost, noise and efficiency. The adaptive, non-overlapping MOSFET gate-drivers and high-side bootstrap structure helps to further maximize efficiency. The high-side power FET drain voltage can be from 2.2V to 16V and the output voltage is adjustable down to 0.6V.
Reliability Metrics
| Part Number |
Process |
EFR Reject |
EFR Sample Size |
PPM |
LTA Rejects |
LTA Device Hours |
FITS |
MTTF (Hours) |
|
LM2727MTC | ABCD150 | 0 | 34175 | 0 | 0 | 4234000 | 1 | 1201409060
|
|
LM2727MTCX | ABCD150 | 0 | 34175 | 0 | 0 | 4234000 | 1 | 1201409060
|
Note: The Early Failure Rates (EFR) were calculated as point estimate PPM based on rejects and sample size for EFR.
The Long Term Failure Rates were calculated
at 60% confidence using the Arrhenius equation at 0.7eV activation energy and derating the assumed stress
temperature of 150°C to an application temperature of 55°C.
For more information on Reliability Metrics, please click here.
Design Tools
| Title | Size in Kbytes |
Date |
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| Power Reference Design Library |
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View |
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Reference Designs
Application Notes
| Title | Size in Kbytes |
Date |
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| AN-1247: Application Note 1247 LM2727 Evaluation Board |
689
Kbytes |
31-Oct-02 |
Download |
| AN-1325: Application Note 1325 LM2742 Evaluation Board |
607
Kbytes |
1-Apr-04 |
Download |
[Information as of 7-Nov-2009]
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