LM3489MM/NOPB TI Power Management

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LM3489MM/NOPB
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Manufacturer : TI
Package/Case : SSOP
RoHS :
Lifecycle :
Stock Resource : Factory Excess Stock / Franchised Distributor
Product Categories : Power Management
Description : Hysteretic PFET Buck Controller with Enable Pin

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LM3489MM/NOPB Overview

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 R_DS(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

Qualified for Automotive Parts
AEC-Q100 Qualified With the Following Results:
- 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 V_IN 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

Product Parameters

genericPartNumber

LM3489
partDescription

Hysteretic PFET Buck Controller with Enable Pin
statusDescription

This product has been released to the market and is available for purchase. For some products, newer alternatives may be available.
packageQtyCarrier

1000|SMALL T&R