LM3488

ACTIVE

2.97V to 40V Wide Vin Low-Side N-Channel Controller for Switching Regulators

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Product details

Parameters

Vin (Min) (V) 2.97 Vin (Max) (V) 40 Vout (Min) (V) 1.26 Vout (Max) (V) 500 Regulated outputs (#) 1 Switching frequency (Min) (kHz) 100 Switching frequency (Max) (kHz) 1000 Iq (Typ) (mA) 2.7 Duty cycle (Max) (%) 100 Rating Catalog Operating temperature range (C) -40 to 125 open-in-new Find other Boost controllers (external switch)

Package | Pins | Size

VSSOP (DGK) 8 15 mm² 3 x 4.9 open-in-new Find other Boost controllers (external switch)

Features

  • Automotive Grade Product, AEC-Q100 Qualified
  • 8-Lead VSSOP Package
  • Internal Push-Pull Driver With 1-A Peak Current Capability
  • Current Limit and Thermal Shutdown
  • Frequency Compensation Optimized With a Capacitor and a Resistor
  • Internal Soft-Start
  • Current Mode Operation
  • Undervoltage Lockout With Hysteresis
  • Key Specifications:
    • Wide Supply Voltage Range of 2.97 V to 40 V
    • 100-kHz to 1-MHz Adjustable and Synchronizable Clock Frequency
    • ±1.5% (Overtemperature) Internal Reference
    • 5-µA Shutdown Current (Overtemperature)
  • Create a Custom Design Using the LM3488 with the WEBENCH Power Designer

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Description

The LM3488 is a versatile low-side N-FET high-performance controller for switching regulators. This device is suitable for use in topologies requiring low-side FET, such as boost, flyback, or SEPIC. Moreover, the LM3488 can be operated at extremely high switching frequency to reduce the overall solution size. The switching frequency of LM3488 can be adjusted to any value from 100 kHz to 1 MHz by using a single external resistor or by synchronizing it to an external clock. Current mode control provides superior bandwidth and transient response, besides cycle-by-cycle current limiting. Output current can be programmed with a single external resistor.

The LM3488 has built-in features such as thermal shutdown, short-circuit protection, and overvoltage protection. Power-saving shutdown mode reduces the total supply current to 5 µA and allows power supply sequencing. Internal soft-start limits the inrush current at start-up.

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Technical documentation

= Top documentation for this product selected by TI
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Type Title Date
* Datasheet LM3488/-Q1 Automotive High-Efficiency Controller for Boost, SEPIC and Fly-Back DC-DC Converters datasheet (Rev. O) Jul. 06, 2015
Application note LM34xx How to Design Flyback Converter with LM3481 Boost Controller (Rev. A) Apr. 08, 2019
Technical articles How to add overvoltage protection to a synchronous boost controller Sep. 17, 2018
Selection guide Power Management Guide 2018 (Rev. R) Jun. 25, 2018
Application note Softstart Using Constant Current Constant Voltage Approach Jul. 24, 2015
Technical articles Portable speaker power: Making the bass possible May 12, 2015
Application note Demystifying Type II and Type III Compensators Using Op-Amp and OTA for DC/DC Co Jul. 11, 2014
User guide AN-1204 LM3478/LM3488 Evaluation Board (Rev. A) Oct. 30, 2013
User guide AN-1193 LM3477 Evaluation Board (Rev. E) Apr. 29, 2013
Application note AN-1286 Compensation For The LM3478 Boost Controller (Rev. C) Apr. 23, 2013
Application note AN-1484 Designing A SEPIC Converter (Rev. E) Apr. 23, 2013
Application note AN-1990 Compensation for Current Mode Control SEPIC Converters (Rev. A) Apr. 23, 2013
Application note Modeling & Design of Current Mode Control Boost Converters (Rev. B) Apr. 23, 2013

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Design tools & simulation

SIMULATION MODEL Download
SNVMAX0B.ZIP (5 KB) - PSpice Model
SIMULATION MODEL Download
SNVMAX1A.ZIP (96 KB) - PSpice Model
SIMULATION TOOL Download
PSpice® for TI design and simulation tool
PSPICE-FOR-TI — PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
Features
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)
CALCULATION TOOL Download
Fly-Buck and Flyback Topology Selector
FLYBUCK-FLYBACK-DESIGN-CALC This tool helps a power supply engineer to select the right isolated DC-DC topology based on the specifications. Depending on the topology chosen, the calculator also recommends the right IC for the design.
Features
  • Features isolated topologies like Fly-Buck™, Fly-Buck-Boost, DCM and CCM Flyback
  • Capability to design up to 6 isolated outputs
  • Recommends ICs for desired application design
  • Incorporates loop compensation in designs
  • Compares efficiency, external component count and transformer currents for every topology (...)

Reference designs

REFERENCE DESIGNS Download
Ultrasound smart probe power supply reference design
TIDA-010057 — Significant technological advancements and high degree of integration in Medical imaging, especially hand-held ultrasound smart probes, are pushing engineers to come up with highly-efficient, noise immune power solutions in a small size. This reference design documents end to end power and data (...)
document-generic Schematic

CAD/CAE symbols

Package Pins Download
VSSOP (DGK) 8 View options

Ordering & quality

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