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LM2695 -
High Voltage (30V, 1.25A) Step Down Switching Regulator
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Features
| • | Integrated 33V, N-Channel buck switch |
| • | Integrated start-up regulator |
| • | Input Voltage Range: 8V to 30V |
| • | No loop compensation required |
| • | Ultra-Fast transient response |
| • | Operating frequency remains constant with load current and input voltage |
| • | Maximum Duty Cycle Limited During Start-Up |
| • | Adjustable output voltage |
| • | Valley Current Limit At 1.25A |
| • | Precision internal reference |
| • | Low bias current |
| • | Highly efficient operation |
| • | Thermal shutdown |
General Description
The LM2695 Step Down Switching Regulator features all of the functions needed to implement a low cost, efficient, buck bias regulator capable of supplying 1.25A to the load. More...
Applications
| • | High Efficiency Point-Of-Load (POL) Regulator |
| • | Non-Isolated Telecommunication Buck Regulator |
| • | Secondary High Voltage Post Regulator |
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Typical Application
click for larger image
| Parameters | Values |
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| Output Current |
1250 mA |
| Input Min Voltage |
8 Volt |
| Input Max Voltage |
30 Volt |
| Output Min |
2.5 Volt |
| Output Max |
24 Volt |
| Frequency Min |
50 kHz |
| Frequency Max |
800 kHz |
| Efficiency (peak) |
96 % |
| On/Off Pin |
Yes |
| Error Flag |
No |
| SoftStart |
Yes |
| Sync Pin |
No |
| Inverting |
Yes |
| Flyback |
No |
| RegType |
Switching Regulator |
| Temperature Min |
-40 deg C |
| Temperature Max |
125 deg C |
| Adjustable Output |
Yes |
| Adj Switch Frequency |
Yes |
| PWM Mode |
Constant on-time |
| Topology |
Buck |
| Special Features |
No compensation required, ultra-fast transient response |
| Step-Down |
Yes |
| Multiple Output Capability |
No |
| Output Power |
Undefined Watt |
| Output Voltage |
Undefined Volt |
| Output Range |
2.5V to 24V |
| Switching Frequency |
1000 kHz |
| Feedback Voltage |
2.5 Volt |
| Regulator Family |
Undefined |
| Synchronous Rectification |
No |
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Also Recommended
| LM2694▲ | Lower Current Version, 600mA |
Additional Resources
Application Notes
Block Diagram
*click for larger image
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Datasheet
RoHS Compliance Information
| Size in Kbytes | Date |
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| LM2695 High Voltage (30V, 1.25A) Step Down Switching Regulator |
634
Kbytes |
10-Jan-06 |
Download |
LM2695 High Voltage (30V, 1.25A) Step Down Switching Regulator (Japanese)
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382 Kbytes |
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Package Availability, Models, Samples & Pricing
General Description
The LM2695 Step Down Switching Regulator features all of the functions needed to implement a low cost, efficient, buck bias regulator capable of supplying 1.25A to the load. This buck regulator contains a 33V N-Channel Buck Switch, and is available in the thermally enhanced LLP-10 and TSSOP-14EP packages. The hysteretic regulation scheme requires no loop compensation, results in fast load transient response, and simplifies circuit implementation. The operating frequency remains constant with line and load variations due to the inverse relationship between the input voltage and the on-time. The current limit detection is set at 1.25A. Additional features include: VCC under-voltage lockout, thermal shutdown, gate drive under-voltage lockout, and maximum duty cycle limiter.
Reliability Metrics
| Part Number |
Process |
EFR Reject |
EFR Sample Size |
PPM |
LTA Rejects |
LTA Device Hours |
FITS |
MTTF (Hours) |
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LM2695MH | ABCD150 | 0 | 34175 | 0 | 0 | 4234000 | 1 | 1201409060
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LM2695MHX | ABCD150 | 0 | 34175 | 0 | 0 | 4234000 | 1 | 1201409060
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LM2695SD | ABCD150 | 0 | 34175 | 0 | 0 | 4234000 | 1 | 1201409060
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LM2695SDX | ABCD150 | 0 | 34175 | 0 | 0 | 4234000 | 1 | 1201409060
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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 |
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| AN-1444: Application Note 1444 LM2695 Evaluation Board |
716
Kbytes |
15-Feb-06 |
Download |
More Application Notes
| Title | Size in Kbytes |
Date |
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| AN-1202: Application Note 1202 LM2698 Demoboard |
217
Kbytes |
10-May-04 |
Download |
| AN-1472: Application Note 1472 LM2694 Evaluation Board |
796
Kbytes |
16-May-06 |
Download |
| AN-1410: Application Note 1410 LM2696 Demonstration Board |
566
Kbytes |
14-Aug-06 |
Download |
AN-1410 (Chinese): Application Note 1410 LM2696 Demonstration Board
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314 Kbytes |
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[Information as of 8-Nov-2009]
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