LM3489MM

Electronic & Electrical Components

> Semiconductors - ICs

> Power Management

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Series Information for LM3489MM - Texas Instruments

Features

  • feature
    1.239 V to VIN Adjustable Output Range
  • feature
    100% Duty Cycle Operation
  • feature
    8-Pin VSSOP Package
  • feature
    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
  • feature
    Current Limit Protection
  • feature
    Dedicated Enable Pin (on if Unconnected)
  • feature
    Easy-to-Use Control Methodology
  • feature
    High Efficiency: 93%
  • feature
    Maximum Operation Frequency > 1 MHz
  • feature
    No Control Loop Compensation Required
  • feature
    Qualified for Automotive Parts
  • feature
    Shutdown Mode Draws Only 7-u00b5A Supply Current
  • feature
    Wide 4.5-V to 35-V Input Range
  • feature
    u00b11.3% (u00b12% Over Temperature) Internal Reference

Description

BUCK CONTROLLER PFET SMD MSOP8
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:
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

Avnet America

DC DC Cntrlr Single-OUT Buck 4.5V to 35V Input 8-Pin MSOP T/R

Avnet America product

Avnet Europe

DC DC Cntrlr Single-OUT Buck 4.5V to 35V Input 8-Pin MSOP T/R

Avnet Europe product