LTC3772ETS8#TRPBF
ActiveMICROPOWER NO RSENSECONSTANT FREQUENCY STEP-DOWN DC/DC CONTROLLER
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LTC3772ETS8#TRPBF
ActiveMICROPOWER NO RSENSECONSTANT FREQUENCY STEP-DOWN DC/DC CONTROLLER
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Technical Specifications
Parameters and characteristics for this part
| Specification | LTC3772ETS8#TRPBF |
|---|---|
| Clock Sync | False |
| Control Features | Enable, Current Limit |
| 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 | SOT-23-8 Thin, TSOT-23-8 |
| Supplier Device Package | TSOT-23-8 |
| Synchronous Rectifier | False |
| Topology | Buck |
| Voltage - Supply (Vcc/Vdd) [Max] | 9.8 V |
| Voltage - Supply (Vcc/Vdd) [Min] | 2.75 V |
LTC3772B Series
Micropower No RSENSEConstant Frequency Step-Down DC/DC Controller
| Part | Synchronous Rectifier | Clock Sync | Duty Cycle (Max) [Max] | Function | Output Configuration | Package / Case | Control Features | Mounting Type | Output Phases | Operating Temperature [Max] | Operating Temperature [Min] | Number of Outputs | Topology | Voltage - Supply (Vcc/Vdd) [Min] | Voltage - Supply (Vcc/Vdd) [Max] | Supplier Device Package | Frequency - Switching | Output Type | Frequency - Switching [Max] | Frequency - Switching [Min] |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Analog Devices | 100 % | Step-Down | Positive | 8-WFDFN Exposed Pad | Current Limit Enable | Surface Mount | 1 | 85 °C | -40 °C | 1 | Buck | 2.75 V | 9.8 V | 8-DFN (3x2) | 550 kHz | Transistor Driver | ||||
Analog Devices | 100 % | Step-Down | Positive | SOT-23-8 Thin TSOT-23-8 | Current Limit Enable | Surface Mount | 1 | 85 °C | -40 °C | 1 | Buck | 2.75 V | 9.8 V | TSOT-23-8 | 550 kHz | Transistor Driver | ||||
Analog Devices | 100 % | Step-Down | Positive | 8-WFDFN Exposed Pad | Current Limit Enable | Surface Mount | 1 | 85 °C | -40 °C | 1 | Buck | 2.75 V | 9.8 V | 8-DFN (3x2) | Transistor Driver | 550 kHz | 200 kHz | |||
Analog Devices | 100 % | Step-Down | Positive | SOT-23-8 Thin TSOT-23-8 | Current Limit Enable | Surface Mount | 1 | 85 °C | -40 °C | 1 | Buck | 2.75 V | 9.8 V | TSOT-23-8 | 550 kHz | Transistor Driver |
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 | $ 2.84 | |
Description
General part information
LTC3772B Series
The LTC3772B is a constant frequency current mode step-down DC/DC controller in a low profile 8-lead SOT-23 (ThinSOT™) and a 3mm × 2mm DFN package. The No RSENSE™architecture eliminates the need for a current sense resistor, improving efficiency and saving board space.The LTC3772B automatically switches into pulse skipping operation at light loads. It consumes only 200μA of quiescent current under a no-load condition.The LTC3772B incorporates an undervoltage lockout feature that shuts down the device when the input voltage falls below 2V. To maximize the runtime from a battery source, the external P-channel MOSFET is turned on continuously in dropout (100% duty cycle). High switching frequency of 550kHz allows the use of a small inductor and capacitors. An internal soft-start smoothly ramps the output voltage from zero to its regulation point.Burst ModeLTC3772YesLTC3772BNoApplications1- or 2-Cell Li-Ion Battery-Powered ApplicationsWireless DevicesPortable ComputersDistributed Power Systems
Documents
Technical documentation and resources