LTC3490ES8#PBF
ActiveSINGLE CELL 350MA LED DRIVER
LTC3490ES8#PBF
ActiveSINGLE CELL 350MA LED DRIVER
Description
General part information
LTC3490 Series
The LTC3490 provides a constant current drive for 1W LED applications. It is a high efficiency boost converter that operates from 1 or 2 NiMH or alkaline cells and generates 350mA of constant current with up to 4V of compliance. It contains a 100mΩ NFET switch and a 130mΩ PFET synchronous rectifier. The fixed switching frequency is internally set to 1.3MHz.The LTC3490 limits the output voltage to 4.7V if the output load is disconnected. It also features an analog dimming capability that reduces the drive current proportional to the CTRL/SHDN pin voltage. A low-battery logic output signals when the battery has dropped below 1V/cell. An undervoltage lockout circuit shuts down the LTC3490 when the battery voltage drops below 0.85V/cell. The feedback loop is internally compensated to minimize component count.ApplicationsPortable LightingRechargeable Flashlights
Technical Specifications
Parameters and characteristics for this part
| Specification | LTC3490ES8#PBF |
|---|---|
| Current - Output / Channel | 350 mA |
| Dimming | Analog |
| Frequency | 1.3 MHz |
| Internal Switch(s) | Yes |
| Mounting Type | Surface Mount |
| Number of Outputs | 1 |
| Operating Temperature (Max) | 85 °C |
| Operating Temperature (Min) | -40 °C |
| Package Length | 0.154 in |
| Package Name | 8-SO, 8-SOIC |
| Package Width | 3.9 mm |
| Topology | Step-Up (Boost) |
| Type | DC DC Regulator |
| Voltage - Output (Max) | 4 V |
| Voltage - Output (Min) | 2.8 V |
| Voltage - Supply (Max) | 3.2 V |
| Voltage - Supply (Min) | 1 V |
Pricing
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