LTC3869EUFD#TRPBF
ActiveDC/DC CONTROLLER, SYNCHRONOUS BUCK, 4V TO 38V SUPPLY, 2 OUTPUT, 95% DUTY CYCLE, 780KHZ, QFN-EP-28
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LTC3869EUFD#TRPBF
ActiveDC/DC CONTROLLER, SYNCHRONOUS BUCK, 4V TO 38V SUPPLY, 2 OUTPUT, 95% DUTY CYCLE, 780KHZ, QFN-EP-28
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Technical Specifications
Parameters and characteristics for this part
| Specification | LTC3869EUFD#TRPBF |
|---|---|
| Clock Sync | False |
| Control Features | Power Good, Soft Start, Tracking, Frequency Control, Enable, Current Limit |
| Duty Cycle (Max) | 95 % |
| Frequency - Switching [Max] | 780 kHz |
| Frequency - Switching [Min] | 250 kHz |
| Function | Step-Down |
| Mounting Type | Surface Mount |
| Number of Outputs | 2 |
| Operating Temperature [Max] | 125 ¯C |
| Operating Temperature [Min] | -40 °C |
| Output Configuration | Positive |
| Output Phases | 2 |
| Output Type | Transistor Driver |
| Package / Case | 28-WFQFN Exposed Pad |
| Supplier Device Package | 28-QFN (4x5) |
| Synchronous Rectifier | True |
| Topology | Buck |
| Voltage - Supply (Vcc/Vdd) [Max] | 38 V |
| Voltage - Supply (Vcc/Vdd) [Min] | 4 V |
LTC3869 Series
Dual, 2-Phase Synchronous Step-Down DC/DC Controllers
| Part | Voltage - Supply (Vcc/Vdd) [Max] | Voltage - Supply (Vcc/Vdd) [Min] | Output Type | Supplier Device Package | Frequency - Switching [Max] | Frequency - Switching [Min] | Topology | Output Phases | Number of Outputs | Mounting Type | Operating Temperature [Min] | Operating Temperature [Max] | Function | Package / Case | Synchronous Rectifier | Output Configuration | Clock Sync | Duty Cycle (Max) | Control Features |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 Analog Devices | 38 V | 4 V | Transistor Driver | 28-QFN (4x4) | 780 kHz | 250 kHz | Buck | 2 | 2 | Surface Mount | -40 °C | 125 ¯C | Step-Down | 28-WFQFN Exposed Pad | Positive | 95 % | Current Limit Enable Frequency Control Power Good Soft Start Tracking | ||
Analog Devices | 38 V | 4 V | Transistor Driver | 28-QFN (4x4) | 780 kHz | 250 kHz | Buck | 2 | 2 | Surface Mount | -40 °C | 125 ¯C | Step-Down | 28-WFQFN Exposed Pad | Positive | 95 % | Current Limit Enable Frequency Control Power Good Soft Start Tracking | ||
Analog Devices | 38 V | 4 V | Transistor Driver | 28-QFN (4x5) | 780 kHz | 250 kHz | Buck | 2 | 2 | Surface Mount | -40 °C | 125 ¯C | Step-Down | 28-WFQFN Exposed Pad | Positive | 95 % | Current Limit Enable Frequency Control Power Good Soft Start Tracking | ||
 Analog Devices | 38 V | 4 V | Transistor Driver | 28-SSOP | 780 kHz | 250 kHz | Buck | 2 | 2 | Surface Mount | -40 °C | 125 ¯C | Step-Down | 28-SSOP | Positive | 95 % | Current Limit Enable Frequency Control Power Good Soft Start Tracking |
Pricing
Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly
Description
General part information
LTC3869 Series
The LTC3869 is a high performance dual synchronous step-down switching regulator controller that drives all N-channel synchronous power MOSFET stages. A constant frequency current mode architecture allows a phase-lockable frequency of up to 780kHz. Power loss and noise due to the ESR of the input capacitors are minimized by operating the two controller output stages out-of-phase.OPTI-LOOP®compensation allows the transient response to be optimized over a wide range of output capacitance and ESR values. A wide 4V to 38V input supply range encompasses most battery chemistries. Independent TK/SS pins for each controller ramp the output voltage during start-up. Current foldback limits MOSFET heat dissipation during short-circuit conditions. The MODE/PLLIN pin selects among Burst Mode®operation, pulse-skipping mode, or continuous inductor current mode and allows the IC to be synchronized to an external clock.The LTC3869 is available in low profile 4mm × 4mm and 4mm × 5mm QFN packages. The LTC3869-2 is available in an SSOP-28 package. The LTC3869 is pin-compatible with the LTC3850.ApplicationsServer SystemsTelecom SystemsIndustrial and Medical InstrumentsHigh Power Battery-Operated DevicesDC Power Distribution Systems
Documents
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