Datasheet for DC970A-B:
- Manufacturer Part Number : DC970A-B
- Manufacturer : AD
- Description : High Efficiency Buck + VLDO Regulator IC
- Series : LTC3541
- Reference Price : USD 0
- Our Price : We have a better price, contact us by email
- Product Type : Switching Regulators
- Function : Step-Down (Buck) Regulators
- Current Suggest : Production
- Status : Production
- ROHS Status : ROHS Compliant (Lead Free)
- Package Type : LTC3541-1 Demo Board | 3V = VIN = 5.5V, Vout1 (Buck) = 1.8V or 2.5V @ 500mA, Vout2 (VLDO) = 0.8V/1.2V/1.5V/1.8V @ 300mA
- Pins : -
- MFG Package Case : -
- Part Type : EVAL
- Standard Packing Type : -
- Standard Packing Quantity : -
- Working Temperature : -
- Other Part Number : DC970A-B
- Shipping methods : DHL FEDEX UPS TNT
- Delivery Time : Ship within 1 day.
- Manufacturer Production time : 6-8 weeks (Normally have stocks)
- Weight : 0.001KG
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The LTC3541 combines a synchronous buck DC/DC converter with a very low dropout linear regulator (VLDO) to provide up to two output voltages from a single input voltage with minimal external components. When configured for dual output operation, the LTC3541’s auto start-up feature will bring the Buck output into regulation in a controlled manner prior to enabling the VLDO regulator output without the need for external pin control. VLDO/linear regulator output prior to Buck output sequencing may also be obtained via external pin control. The input voltage range is ideally suited for Li-Ion battery-powered applications, as well as powering sub-3.3V logic from 5V or 3.3V rails.
The synchronous buck converter provides a high efficiency output, typically 90%, capable of providing up to 500mA of continuous output current while switching at 2.25MHz, allowing the use of small surface mount inductors and capacitors. A mode-select pin allows Burst Mode operation to be enabled for higher efficiency at light load currents, or disabled for lower noise, constant frequency operation.
The VLDO regulator provides a low noise, low voltage output capable of providing up to 300mA of continuous output current using only a 2.2μF ceramic capacitor. The input supply voltage of the VLDO regulator (LVIN) may come from the buck regulator or a separate supply.
| Options | Vout Switcher (V) | Vout VLDO | Auto Start Up Sequencing |
| LTC3541 | Adj. down to 0.8V | Adj. down to 0.4V | Switcher, then VLDO |
| LTC3541-1 | Adj. down to 0.8V | Adj down to 0.4V | VLDO, then switcher |
| LTC3541-2 | 1.875V fixed | 1.5V fixed | Switcher, then VLDO |
| LTC3541-3 | 1.8V fixed | 1.575 fixed | VLDO, then switcher |
Applications
- PDAs/Palmtop PCs
- Digital Cameras
- Cellular Phones
- PC Cards
- Wireless and DSL Modems
- Other Portable Power Systems
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
