LTC3619BEDD#PBF
Active400MA/800MA SYNCHRONOUS STEP-DOWN DC/DC WITH AVERAGE INPUT CURRENT LIMIT
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LTC3619BEDD#PBF
Active400MA/800MA SYNCHRONOUS STEP-DOWN DC/DC WITH AVERAGE INPUT CURRENT LIMIT
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Technical Specifications
Parameters and characteristics for this part
| Specification | LTC3619BEDD#PBF |
|---|---|
| Current - Output | 800 mA, 400 mA |
| Frequency - Switching | 2.25 MHz |
| 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 Type | Adjustable |
| Package / Case | 10-WFDFN Exposed Pad |
| Supplier Device Package | 10-DFN (3x3) |
| Synchronous Rectifier | True |
| Topology | Buck |
| Voltage - Input (Max) [Max] | 5.5 V |
| Voltage - Input (Min) [Min] | 2.5 V |
| Voltage - Output (Max) | 5 V |
| Voltage - Output (Min/Fixed) | 0.6 V |
LTC3619B Series
400mA/800mA Synchronous Step-Down DC/DC with Average Input Current Limit
| Part | Package / Case | Package / Case | Mounting Type | Number of Outputs | Output Configuration | Function | Voltage - Output (Max) | Voltage - Input (Max) [Max] | Voltage - Output (Min/Fixed) | Topology | Voltage - Input (Min) [Min] | Frequency - Switching | Operating Temperature [Min] | Operating Temperature [Max] | Supplier Device Package | Output Type | Synchronous Rectifier | Current - Output |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Analog Devices | 0.118 in 3 Lead | 10-MSOP 10-TFSOP Exposed Pad | Surface Mount | 2 | Positive | Step-Down | 5 V | 5.5 V | 0.6 V | Buck | 2.5 V | 2.25 MHz | -40 °C | 125 ¯C | 10-MSOP-EP | Adjustable | 400 mA 800 mA | |
Analog Devices | 0.118 in 3 Lead | 10-MSOP 10-TFSOP Exposed Pad | Surface Mount | 2 | Positive | Step-Down | 5 V | 5.5 V | 0.6 V | Buck | 2.5 V | 2.25 MHz | -40 °C | 125 ¯C | 10-MSOP-EP | Adjustable | 400 mA 800 mA | |
Analog Devices | 0.118 in 3 Lead | 10-MSOP 10-TFSOP Exposed Pad | Surface Mount | 2 | Positive | Step-Down | 5 V | 5.5 V | 0.6 V | Buck | 2.5 V | 2.25 MHz | -40 °C | 125 ¯C | 10-MSOP-EP | Adjustable | 400 mA 800 mA | |
Analog Devices | 10-WFDFN Exposed Pad | Surface Mount | 2 | Positive | Step-Down | 5 V | 5.5 V | 0.6 V | Buck | 2.5 V | 2.25 MHz | -40 °C | 125 ¯C | 10-DFN (3x3) | Adjustable | 400 mA 800 mA | ||
Analog Devices | 0.118 in 3 Lead | 10-MSOP 10-TFSOP Exposed Pad | Surface Mount | 2 | Positive | Step-Down | 5 V | 5.5 V | 0.6 V | Buck | 2.5 V | 2.25 MHz | -40 °C | 125 ¯C | 10-MSOP-EP | Adjustable | 400 mA 800 mA | |
Analog Devices | 10-WFDFN Exposed Pad | Surface Mount | 2 | Positive | Step-Down | 5 V | 5.5 V | 0.6 V | Buck | 2.5 V | 2.25 MHz | -40 °C | 125 ¯C | 10-DFN (3x3) | Adjustable | 400 mA 800 mA | ||
Analog Devices | 10-WFDFN Exposed Pad | Surface Mount | 2 | Positive | Step-Down | 5 V | 5.5 V | 0.6 V | Buck | 2.5 V | 2.25 MHz | -40 °C | 125 ¯C | 10-DFN (3x3) | Adjustable | 400 mA 800 mA | ||
Analog Devices | 0.118 in 3 Lead | 10-MSOP 10-TFSOP Exposed Pad | Surface Mount | 2 | Positive | Step-Down | 5 V | 5.5 V | 0.6 V | Buck | 2.5 V | 2.25 MHz | -40 °C | 125 ¯C | 10-MSOP-EP | Adjustable | 400 mA 800 mA | |
Analog Devices | 10-WFDFN Exposed Pad | Surface Mount | 2 | Positive | Step-Down | 5 V | 5.5 V | 0.6 V | Buck | 2.5 V | 2.25 MHz | -40 °C | 125 ¯C | 10-DFN (3x3) | Adjustable | 400 mA 800 mA | ||
Analog Devices | 10-WFDFN Exposed Pad | Surface Mount | 2 | Positive | Step-Down | 5 V | 5.5 V | 0.6 V | Buck | 2.5 V | 2.25 MHz | -40 °C | 125 ¯C | 10-DFN (3x3) | Adjustable | 400 mA 800 mA |
Pricing
Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly
| Distributor | Package | Quantity | $ | |
|---|---|---|---|---|
| Digikey | Tube | 1 | $ 8.35 | |
| 10 | $ 5.74 | |||
| 25 | $ 5.07 | |||
| 100 | $ 4.31 | |||
| 250 | $ 3.94 | |||
| 500 | $ 3.72 | |||
| 1000 | $ 3.54 | |||
| 2500 | $ 3.40 | |||
Description
General part information
LTC3619B Series
The LTC3619B is a dual monolithic synchronous buck regulator using a constant frequency current mode architecture.The input supply voltage range is 2.5V to 5.5V, making it ideal for Li-Ion and USB powered applications. 100% duty cycle capability provides low dropout operation, extending the run time in battery-operated systems. Low output voltages are supported with the 0.6V feedback reference voltage. Channel 1 and channel 2 can supply 400mA and 800mA output current, respectively.The LTC3619B’s programmable average input current limit is ideal for USB applications and for point-of-load power supplies because the LTC3619B’s limited input current will still allow its output to deliver high peak load currents without collapsing the input supply. When the sum of both channels’ currents exceeds the input current limit, channel 2 is current limited while channel 1 remains regulated. The operating frequency is internally set at 2.25MHz allowing the use of small surface mount inductors. Internal soft-start reduces in-rush current during start-up. The LTC3619B is available in small MSOP and 3mm × 3mm DFN packages. The LTC3619B is also available in a low quiescent current, high efficiency Burst Mode®version, LTC3619.Light Load OperationLTC3619Low Ripple Burst Mode (<20mVpp), IQ< 50μALTC3619BPulse Skip (<5mVpp)ApplicationsHigh Peak Load Current ApplicationsUSB Powered DevicesSupercapacitor ChargingRadio Transmitters and Other Handheld Devices
Documents
Technical documentation and resources