LTC3814-5: 60V Current Mode Synchronous Step-Up Controller Data Sheet1/21/2011357K
Features and Benefits
- High Output Voltages: Up to 60V
- Large 1Ω Gate Drivers
- No Current Sense Resistor Required
- Dual N-Channel MOSFET Synchronous Drive
- ±0.5% 0.8V Voltage Reference
- Fast Transient Response
- Programmable Soft-Start
- Generates 5.5V Driver Supply
- Power Good Output Voltage Monitor
- Adjustable Off-Time/Frequency: tOFF(MIN) < 100ns
- Adjustable Cycle-by-Cycle Current Limit
- Undervoltage Lockout On Driver Supply
- Output Overvoltage Protection
- Thermally Enhanced 16-Pin TSSOP Package
The LTC3814-5 is a synchronous step-up switching regulator controller that can generate output voltages up to 60V. The LTC3814-5 uses a constant off-time peak current control architecture to deliver very high duty cycles with accurate cycle-by-cycle current limit without requiring a sense resistor.
A precise internal reference provides ±0.5% DC accuracy. A high bandwidth (25MHz) error amplifier provides very fast line and load transient response. Large 1Ω gate drivers allow the LTC3814-5 to drive large power MOSFETs for higher current applications. The operating frequency is selected by an external resistor and is compensated for variations in VIN. A shutdown pin allows the LTC3814-5 to be turned off reducing the supply current to <230μA.
- 24V Fan Supplies
- 48V Telecom and Base Station Power Supplies
- Networking Equipment, Servers
- Automotive and Industrial Control Systems
Product Lifecycle Production
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.
Evaluation Kits (1)
Demonstration circuit 1170 is a 60V current-mode synchronous step-up controller featuring the LTC3814-5. The circuit is configured as a synchronous step-up regulator operating at 330kHz switching frequency. Output voltage is 24V at 5A maximum load. The input voltage range is 5V to 14V.
Documentation & Resources
R533 Reliability Data3/26/201817 K
DC1170A - Demo Manual10/6/2009230K
Synchronous Boost Converters Provide High Voltage without the Heat1/1/2008 LT Journal
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|Part Number||Material Declaration||Reliability Data||Pin/Package Drawing||CAD Symbols, Footprints & 3D Models|
|LTC3814EFE-5#PBF||Material Declaration||Reliability Data||16-Lead TSSOP w/ EP|
|LTC3814EFE-5#TRPBF||Material Declaration||Reliability Data||16-Lead TSSOP w/ EP|
|LTC3814IFE-5#PBF||Material Declaration||Reliability Data||16-Lead TSSOP w/ EP|
|LTC3814IFE-5#TRPBF||Material Declaration||Reliability Data||16-Lead TSSOP w/ EP|
|Wafer Fabrication Data||R533 Reliability Data|
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