Datasheet
RoHS Compliance Information
| Size in Kbytes | Date |
 |
| LM2650 Synchronous Step-Down DC/DC Converter |
215
Kbytes |
1-Nov-00 |
Download |
LM2650 Synchronous Step-Down DC/DC Converter (Japanese)
 |
157 Kbytes |
|
 |
Package Availability, Models, Samples & Pricing
General Description
The LM2650 is a step-down DC/DC converter featuring high efficiency over a 3A to milliamperes load range. This feature makes the LM2650 an ideal fit in battery-powered applications that demand long battery life in both run and standby modes.
The LM2650 also features a logic-controlled shutdown mode in which it draws at most 25µA from the input power supply.
The LM2650 employs a fixed-frequency pulse-width modulation (PWM) and synchronous rectification to achieve very high efficiencies. In many applications, efficiencies reach 95%+ for loads around 1A and exceed 90% for moderate to heavy loads from 0.2A to 2A.
A low-power hysteretic or "sleep" mode keeps efficiencies high at light loads. The LM2650 enters and exits sleep mode automatically as the load crosses "sleep in" and "sleep out" thresholds. The LM2650 provides nodes for programming both thresholds via external resistors. A logic input allows the user to override the automatic sleep feature and keep the LM2650 in PWM mode regardless of the load level.
An optional soft-start feature limits current surges from the input power supply at start up and provides a simple means of sequencing multiple power supplies.
Reliability Metrics
| Part Number |
Process |
EFR Reject |
EFR Sample Size |
PPM |
LTA Rejects |
LTA Device Hours |
FITS |
MTTF (Hours) |
|
LM2650M-ADJ | LMDMOS | 0 | 17710 | 0 | 0 | 2470000 | 2 | 700869244
|
|
LM2650MX-ADJ | LMDMOS | 0 | 17710 | 0 | 0 | 2470000 | 2 | 700869244
|
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.
Application Notes
| Title | Size in Kbytes |
Date |
|
| AN-1071: Application Note 1071 Information About the LM2650 Evaluation Board Rev. 1 |
105
Kbytes |
4-Oct-04 |
Download |
AN-1071 (Japanese): Application Note 1071 Information About the LM2650 Evaluation Board Rev. 1
 |
279 Kbytes |
|
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More Application Notes
| Title | Size in Kbytes |
Date |
|
| AN-1143: Application Note 1143 LM2651_3.3V_EVAL 1.5A High Efficiency Synchronous Switching Regulator Evaluation Board |
150
Kbytes |
24-Jul-08 |
Download |
| AN-1147: Application Note 1147 LM2651_EVAL 1.5A High Efficiency Synchronous Switching Regulator Evaluation Board |
149
Kbytes |
2-Oct-07 |
Download |
| AN-1133: Application Note 1133 LM2653EVAL 1.5A Synchronous Switching Regulator Evaluation Board |
76
Kbytes |
4-Oct-04 |
Download |
| AN-1215: Application Note 1215 LM2655 2.5A Synchronous Switching Regulator Evaluation Board |
307
Kbytes |
10-May-04 |
Download |
| AN-1520: Application Note 1520 A Guide to Board Layout for Best Thermal Resistance for Exposed Packages |
2176
Kbytes |
7-Sep-06 |
Download |
AN-1520 (Chinese): Application Note 1520 A Guide to Board Layout for Best Thermal Resistance for Exposed Packages
|
849 Kbytes |
|
 |
[Information as of 8-Nov-2009]
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