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Details for LM3489MM by Texas Instruments
Electronic & Electrical Components > Semiconductors - ICs > Power Management
BUCK CONTROLLER PFET SMD MSOP8
LM3489MM image

LM3489MM by Texas Instruments

BUCK CONTROLLER PFET SMD MSOP8
Features
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
Part Information
LM3489MM image
RoHS Compliant
Description
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.
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
Alternate Descriptions
DC DC Cntrlr Single-OUT Buck 4.5V to 35V Input 8-Pin MSOP T/R Avnet America
DC DC Cntrlr Single-OUT Buck 4.5V to 35V Input 8-Pin MSOP T/R Avnet Europe