LTC1773EMS#TRPBF
ActiveSYNCHRONOUS STEP-DOWN DC/DC CONTROLLER
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LTC1773EMS#TRPBF
ActiveSYNCHRONOUS STEP-DOWN DC/DC CONTROLLER
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Technical Specifications
Parameters and characteristics for this part
| Specification | LTC1773EMS#TRPBF |
|---|---|
| Clock Sync | True |
| Control Features | Soft Start, Enable |
| Duty Cycle (Max) [Max] | 100 % |
| Frequency - Switching | 550 kHz |
| Function | Step-Down |
| Mounting Type | Surface Mount |
| Number of Outputs | 1 |
| Operating Temperature [Max] | 85 °C |
| Operating Temperature [Min] | -40 °C |
| Output Configuration | Positive |
| Output Phases | 1 |
| Output Type | Transistor Driver |
| Package / Case | 10-MSOP, 10-TFSOP |
| Package / Case [x] | 3 mm |
| Package / Case [x] | 0.118 in |
| Supplier Device Package | 10-MSOP |
| Synchronous Rectifier | True |
| Topology | Buck |
| Voltage - Supply (Vcc/Vdd) [Max] | 8.5 V |
| Voltage - Supply (Vcc/Vdd) [Min] | 2.65 V |
LTC1773 Series
Synchronous Step-Down DC/DC Controller
| Part | Operating Temperature [Max] | Operating Temperature [Min] | Control Features | Synchronous Rectifier | Supplier Device Package | Package / Case | Package / Case [x] | Package / Case [x] | Topology | Output Type | Clock Sync | Frequency - Switching | Function | Duty Cycle (Max) [Max] | Voltage - Supply (Vcc/Vdd) [Min] | Voltage - Supply (Vcc/Vdd) [Max] | Output Configuration | Number of Outputs | Mounting Type | Output Phases |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Analog Devices | 85 °C | -40 °C | Enable Soft Start | 10-MSOP | 10-MSOP 10-TFSOP | 3 mm | 0.118 in | Buck | Transistor Driver | 550 kHz | Step-Down | 100 % | 2.65 V | 8.5 V | Positive | 1 | Surface Mount | 1 | ||
Analog Devices | 85 °C | -40 °C | Enable Soft Start | 10-MSOP | 10-MSOP 10-TFSOP | 3 mm | 0.118 in | Buck | Transistor Driver | 550 kHz | Step-Down | 100 % | 2.65 V | 8.5 V | Positive | 1 | Surface Mount | 1 |
Pricing
Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly
| Distributor | Package | Quantity | $ | |
|---|---|---|---|---|
| Digikey | Tape & Reel (TR) | 2500 | $ 3.94 | |
Description
General part information
LTC1773 Series
The LTC1773 is a current mode synchronous buck regulator controller that drives external complementary power MOSFETs using a fixed frequency architecture. The operating supply range is from 2.65V to 8.5V, making it suitable for 1- or 2-cell lithium-ion battery powered applications. Burst Mode®operation provides high efficiency at low load currents. 100% duty cycle provides low dropout operation which extends operating time in battery-operated systems.The operating frequency is internally set at 550kHz, allowing the use of small surface mount inductors. For switching-noise sensitive applications, it can be synchronized up to 750kHz. Peak current limit is user programmable with an external high side sense resistor. A SYNC/FCB control pin guarantees regulation of secondary windings regardless of load on the main output by forcing continuous operation. Burst Mode operation is inhibited during synchronization or when the SYNC/FCB pin is pulled low to reduce noise and RF interference. Soft-start is provided by an external capacitor.Synchronous rectification increases efficiency and eliminates the need for a Schottky diode, saving components and board space. The LTC1773 comes in a 10-lead MSOP package.ApplicationsCellular TelephonesRF PA SupplyPortable InstrumentsWireless MODEMSDistributed Power SystemsNotebook and Palm Top Computers, PDAsSingle and Dual Cell Lithium-Ion Powered Devices
Documents
Technical documentation and resources