LTC3772EDDB#TRMPBF
ActiveMICROPOWER NO RSENSECONSTANT FREQUENCY STEP-DOWN DC/DC CONTROLLER
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LTC3772EDDB#TRMPBF
ActiveMICROPOWER NO RSENSECONSTANT FREQUENCY STEP-DOWN DC/DC CONTROLLER
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Technical Specifications
Parameters and characteristics for this part
| Specification | LTC3772EDDB#TRMPBF |
|---|---|
| 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 | 8-WFDFN Exposed Pad |
| Supplier Device Package | 8-DFN (3x2) |
| Synchronous Rectifier | False |
| Topology | Buck |
| Voltage - Supply (Vcc/Vdd) [Max] | 9.8 V |
| Voltage - Supply (Vcc/Vdd) [Min] | 2.75 V |
Pricing
Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly
| Distributor | Package | Quantity | $ | |
|---|---|---|---|---|
| Digikey | Cut Tape (CT) | 1 | $ 7.28 | |
| 10 | $ 4.96 | |||
| 25 | $ 4.36 | |||
| 100 | $ 3.69 | |||
| 250 | $ 3.36 | |||
| Digi-Reel® | 1 | $ 7.28 | ||
| 10 | $ 4.96 | |||
| 25 | $ 4.36 | |||
| 100 | $ 3.69 | |||
| 250 | $ 3.36 | |||
| Tape & Reel (TR) | 500 | $ 3.17 | ||
| 1000 | $ 3.00 | |||
| 1500 | $ 2.92 | |||
| 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