LM3489MM Semiconductors - ICs by Texas Instruments

BUCK CONTROLLER PFET SMD MSOP8

Electronic & Electrical Components>Semiconductors - ICs>Power Management
Status: Unknown
Series: -
RoHS: Unknown
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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.

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Specifications

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
Switching Frequency 1MHz
Topology Buck (Step Down)
Operating Temperature Min -40°C
Operating Temperature Max 125°C
Product Range -
Automotive Qualification Standard -
RoHS Phthalates Compliant Yes
MSL -
SVHC No SVHC (27-Jun-2018)
Adjustable Output Voltage Min 1.239V
Base Number 3489
Frequency 1MHz
Input Voltage Max 45V
Input Voltage Min 3.5V
Operating Temperature Range -40°C to +125°C
Output Current 4A
Output Voltage 35V
Primary Input Voltage 35V
Termination Type Surface Mount Device
Voltage Regulator Type Buck

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The LM3489MM is listed under Electronic & Electrical Components > Semiconductors - ICs > Power Management.

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