LM3489MM Part Information
The LM3489 device is a high-efficiency PFET switching regulator controller that can be used to quickly and easily develop a small, cost-effective, switching buck regulator for a wide range of applications. The hysteretic control architecture provides for simple design without any control loop stability concerns using a wide variety of external components. The PFET architecture also allows for low component count as well as ultra-low dropout, 100% duty cycle operation. Another benefit is high efficiency operation at light loads without an increase in output ripple. A dedicated enable pin provides a shutdown mode drawing only 7 µA. Leaving the enable pin unconnected defaults to on. Current limit protection can be implemented by measuring the voltage across the PFET’s RDS(ON), thus eliminating the need for a sense resistor. A sense resistor may be used to improve current limit accuracy if desired. The cycle-by-cycle current limit can be adjusted with a single resistor, ensuring safe operation over a range of output currents.
- 1.239 V to VIN Adjustable Output Range
- 100% Duty Cycle Operation
- 8-Pin VSSOP Package
- AEC-Q100 Qualified With the Following Results: u2013 Device Temperature Grade 1: u201340u00b0C to 125u00b0C Ambient Operating Temperature Range u2013 Device HBM ESD Classification Level 2 u2013 Device CDM ESD Classification Level C5
- Current Limit Protection
- Dedicated Enable Pin (on if Unconnected)
- Easy-to-Use Control Methodology
- High Efficiency: 93%
- Maximum Operation Frequency > 1 MHz
- No Control Loop Compensation Required
- Qualified for Automotive Parts
- Shutdown Mode Draws Only 7-u00b5A Supply Current
- Wide 4.5-V to 35-V Input Range
- u00b11.3% (u00b12% Over Temperature) Internal Reference
|Supply Voltage Min||4.5V|
|Supply Voltage Max||35V|
|No. of Outputs||1 Output, 1Outputs|
|Duty Cycle (%)||100%|
|Controller IC Case Style||VSSOP|
|No. of Pins||8Pins|
|Topology||Buck (Step Down)|
|Operating Temperature Min||-40°C|
|Operating Temperature Max||125°C|
|Automotive Qualification Standard||-|
|RoHS Phthalates Compliant||Yes|
|SVHC||No SVHC (27-Jun-2018)|
|Adjustable Output Voltage Min||1.239V|
|Input Voltage Max||45V|
|Input Voltage Min||3.5V|
|Operating Temperature Range||-40°C to +125°C|
|Primary Input Voltage||35V|
|Termination Type||Surface Mount Device|
|Voltage Regulator Type||Buck|
Frequently Asked Questions
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The LM3489MM is listed under Electronic & Electrical Components > Semiconductors - ICs > Power Management.
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Is the LM3489MM RoHS compliant?
Yes. This part has been flagged as RoHS Compliant by Farnell.
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