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 |
LTC3772 Series
Micropower No RSENSEConstant Frequency Step-Down DC/DC Controller
| Part | Output Phases | Voltage - Supply (Vcc/Vdd) [Min] | Voltage - Supply (Vcc/Vdd) [Max] | Output Type | Control Features | Frequency - Switching | Supplier Device Package | Function | Mounting Type | Topology | Operating Temperature [Max] | Operating Temperature [Min] | Package / Case | Duty Cycle (Max) [Max] | Clock Sync | Synchronous Rectifier | Output Configuration | Number of Outputs | Frequency - Switching [Max] | Frequency - Switching [Min] |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Analog Devices Inc./Maxim Integrated | 1 | 2.75 V | 9.8 V | Transistor Driver | Current Limit Enable | 550 kHz | 8-DFN (3x2) | Step-Down | Surface Mount | Buck | 85 C | -40 ¯C | 8-WFDFN Exposed Pad | 100 % | Positive | 1 | ||||
 Analog Devices Inc./Maxim Integrated | 1 | 2.75 V | 9.8 V | Transistor Driver | Current Limit Enable | 550 kHz | TSOT-23-8 | Step-Down | Surface Mount | Buck | 85 C | -40 ¯C | SOT-23-8 Thin TSOT-23-8 | 100 % | Positive | 1 | ||||
 Analog Devices Inc./Maxim Integrated | 1 | 2.75 V | 9.8 V | Transistor Driver | Current Limit Enable | 550 kHz | 8-DFN (3x2) | Step-Down | Surface Mount | Buck | 85 C | -40 ¯C | 8-WFDFN Exposed Pad | 100 % | Positive | 1 | ||||
 Analog Devices Inc./Maxim Integrated | 1 | 2.75 V | 9.8 V | Transistor Driver | Current Limit Enable | 8-DFN (3x2) | Step-Down | Surface Mount | Buck | 85 C | -40 ¯C | 8-WFDFN Exposed Pad | 100 % | Positive | 1 | 550 kHz | 200 kHz | |||
Analog Devices Inc./Maxim Integrated | 1 | 2.75 V | 9.8 V | Transistor Driver | Current Limit Enable | 550 kHz | TSOT-23-8 | Step-Down | Surface Mount | Buck | 85 C | -40 ¯C | SOT-23-8 Thin TSOT-23-8 | 100 % | Positive | 1 |
Pricing
Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly
| Distributor | Package | Quantity | $ | Updated |
|---|---|---|---|---|
| Digikey | Cut Tape (CT) | 1 | $ 7.28 | 1m+ |
| 10 | $ 4.96 | |||
| 25 | $ 4.36 | |||
| 100 | $ 3.69 | |||
| 250 | $ 3.36 | |||
| Digi-Reel® | 1 | $ 7.28 | 1m+ | |
| 10 | $ 4.96 | |||
| 25 | $ 4.36 | |||
| 100 | $ 3.69 | |||
| 250 | $ 3.36 | |||
| N/A | 500 | $ 7.02 | 1m+ | |
| Tape & Reel (TR) | 500 | $ 3.17 | 1m+ | |
| 1000 | $ 3.00 | |||
| 1500 | $ 2.92 | |||
| 2500 | $ 2.84 | |||
Description
General part information
LTC3772 Series
The LTC3772 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 LTC3772 automatically switches into Burst Mode operation at light loads to increase efficiency at low output current. It consumes only 40µA of quiescent current under a no-load condition.The LTC3772 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