LM3549SQE/NOPB
LM3549 HIGH POWER SEQUENTIAL LED
Pmic Led Drivers
24-WFQFN Exposed Pad
Active
$4.46 / unit (market reference)
MOQ: 68 pcs
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Parameters
| Parameter | Value |
|---|---|
| Brand | Rochester Electronics, LLC |
| Model | LM3549SQE/NOPB |
| Package / Case | 24-WFQFN Exposed Pad |
| Mounting Type | Surface Mount |
| Operating Temperature | -30°C ~ 85°C (TA) |
| Topology | Step-Down (Buck), Step-Up (Boost) |
| Voltage - Output | 4.6V |
| Number of Outputs | 3 |
| Supplier Device Package | 24-WQFN (4x4) |
| RoHS | RoHS |
| Part Status | Active |
Application & Notes
LM3549SQE/NOPB by Rochester Electronics, LLC is a Step-Down (Buck), Step-Up (Boost) IC commonly used in power supply designs, battery-powered devices, and DC-DC conversion modules. Input voltage up to N/A, output 4.6V. The 24-WFQFN Exposed Pad package with surface mount mounting is standard for compact designs. Pay attention to input/output capacitor selection and PCB layout — switching regulators are sensitive to trace inductance.
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All Technical Specifications
| Type | DC DC Regulator |
| Dimming | I²C |
| Topology | Step-Down (Buck), Step-Up (Boost) |
| Frequency | 2.4MHz |
| Voltage - Output | 4.6V |
| Number of Outputs | 3 |
| Internal Switch(s) | Yes |
| Voltage - Supply (Max) | 5.5V |
| Voltage - Supply (Min) | 2.7V |
| Current - Output / Channel | 705mA |
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