Datasheet for LTC3728LEUH-1#PBF:
- Manufacturer Part Number : LTC3728LEUH-1#PBF
- Manufacturer : AD
- Description : Dual, 550kHz, 2-Phase Synchronous Regulator IC
- Series : LTC3728L-1
- Reference Price : USD 3.84
- 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 : 32-Lead QFN (5mm x 5mm x 0.75mm w/ EP)
- Pins : 32
- MFG Package Case : 05-08-1693
- Part Type : OTH
- Standard Packing Type : Tube
- Standard Packing Quantity : 73
- Working Temperature : -40 to 125C
- Other Part Number : LTC3728LEUH-1#PBF
- 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 LTC3728L-1 is a dual high performance step-down switching regulator controller that drives all N-channel synchronous power MOSFET stages. A constant frequency current mode architecture allows phase-lockable frequency of up to 550kHz. Power loss and noise due to the ESR of the input capacitors are minimized by operating the two controller output stages out of phase. The LTC3728L-1 is identical to the LTC3728L except that the LTC3728L-1 lacks the over current latch-off feature.
OPTI-LOOP compensation allows the transient response to be optimized over a wide range of output capacitance and ESR values. The precision 0.8V reference and power good output indicator are compatible with future microprocessor generations, and a wide 4.5V to 28V (30V maximum/35V for LTC3728LI-1) input supply range encompasses all battery chemistries.
A RUN/SS pin for each controller provides soft-start. Current foldback limits MOSFET dissipation during shortcircuit conditions. The FCB mode pin can select among Burst Mode operation, constant frequency mode and continuous inductor current mode or regulate a secondary winding. The LTC3728L-1 includes a power good output pin that indicates when both outputs are within 7.5% of their designed set point.
| VIN Range | VREF Accy | Current Limit Latch Off | 3.3V LDO Available | |
| LTC3728 | 3.5V to 36V | ±1% | Yes | |
| LTC3728L | 4.5V to 28V | ±1% | Yes | Yes |
| LTC3728LX | 4.5V to 28V | ±1.5% | Yes | Yes |
| LTC3728L-1 | 4.5V to 28V | ±1.5% | Foldback only | Yes |
Applications
- Notebook and Palmtop Computers
- Telecom Systems
- Portable Instruments
- Battery-Operated Digital Devices
- DC Power Distribution 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.
