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TI LM3489QMMX/NOPB product image
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TI LM3489QMMX/NOPBRoHS

Manufacturer
TI
MPN
LM3489QMMX/NOPB
LCSC Part #
C2658600
Packaging
VSSOP-8-0.65mm
Customer #
Key Attributes
Hysteretic PFET Buck Controller With Enable Pin
Datasheetpdf iconTI LM3489QMMX/NOPB
In-Stock: 95
95 In stock, ships now
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QtyUnit PriceTotal Amount
1+$ 2.1579$ 2.16
10+$ 1.8265$ 18.27
30+$ 1.6185$ 48.56
100+$ 1.4056$ 140.56
500+$ 1.3097$ 654.85
1,000+$ 1.2675$ 1267.50
Standard Packaging3500/Full Reel
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Products Specifications

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TypeDescription
CategoryIntegrated Circuits (ICs)/Power Management (PMIC)/DC DC Switching Controllers
ManufacturerTI
PackagingVSSOP-8-0.65mm
Synchronous RectifierNo
FeaturesAdjustable current limiting;Cycle-by-cycle current limiting;Overcurrent Protection
Number of Channels1
TopologyBuck
Operating Voltage4.5V~35V
Switch tube (built-in/external)External
Output Voltage1.239V~35V
Operating Temperature-40℃~+125℃@(TA)
Output Current-
Frequency - Switching1MHz
Output TypeAdjustable
FunctionStep-down type
Quiescent Current280uA
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Additional Information

TypeDetails
Minimum1
Multiple1
Standard Packaging3500
Sales UnitPiece

Introduction

AI Translation

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.

Features

AI Translation
  • Qualified for Automotive Parts
  • Device Temperature Grade 1: -40°C to 125°C Ambient Operating Temperature Range
  • Device HBM ESD Classification Level 2
  • Device CDM ESD Classification Level C5
  • Easy-to-Use Control Methodology
  • No Control Loop Compensation Required
  • Wide 4.5-V to 35-V Input Range
  • 1.239 V to VIN Adjustable Output Range
  • High Efficiency: 93%
  • ±1.3% (±2% Over Temperature) Internal Reference
  • 100% Duty Cycle Operation
  • Maximum Operation Frequency >1 MHz
  • Current Limit Protection
  • Dedicated Enable Pin (on if Unconnected)
  • Shutdown Mode Draws Only 7-μA Supply Current
  • 8-Pin VSSOP Package

Applications

AI Translation
  • Set-Top Boxes
  • DSL or Cable Modems
  • PC/IA
  • Auto PCs
  • TFT Monitors
  • Battery-Powered Portable Applications
  • Distributed Power Systems
  • Always-On Power
  • High-Power LED Drivers
  • Automotive