LM5007

ACTIVE

9-75V Wide Vin, 500mA Constant On-Time Non-Synchronous Buck Regulator

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Product details

Parameters

Vin (Min) (V) 9 Vin (Max) (V) 75 Vout (Min) (V) 2.5 Vout (Max) (V) 73 Iout (Max) (A) 0.5 Iq (Typ) (mA) 0.5 Iq (Typ) (uA) 500 Switching frequency (Min) (kHz) 50 Switching frequency (Max) (kHz) 800 Features Enable, Over Current Protection Operating temperature range (C) -40 to 125 Rating Catalog Regulated outputs (#) 1 open-in-new Find other Buck converters (integrated switch)

Package | Pins | Size

VSSOP (DGK) 8 15 mm² 3 x 4.9 WSON (NGT) 8 16 mm² 4 x 4 open-in-new Find other Buck converters (integrated switch)

Features

  • Versatile Synchronous Buck DC/DC Converter
    • Operating Input Voltage Range of 9 V to 75 V
    • Integrated 80-V, 0.7-A N-Channel Buck Switch
    • Internal High-Voltage VCC Regulator
    • Adjustable Output Voltage
    • High Efficiency Operation
  • Adaptive Constant On-Time Control Architecture
    • Ultra-Fast Transient Response
    • No Control Loop Compensation Required
  • Nearly Constant Switching Frequency
    • PWM On-Time Varies Inversely with Input Voltage
  • Precision 2.5-V Reference
  • Low Input Quiescent Current
  • Inherent Protection Features for Robust Design
    • Intelligent Current Limit Protection
    • VCC and Gate Drive UVLO Protection
    • Thermal Shutdown Protection With Hysteresis
    • External Shutdown Control
  • 8-Pin VSSOP and WSON Packages
  • Create a Custom Regulator Design Using WEBENCH® Power Designer

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Description

The LM5007 0.5-A step-down switching converter features all of the functions needed to implement a low-cost and efficient buck regulator. This high-voltage converter has an integrated 80-V, 0.7-A N-channel buck switch and operates over an input voltage range of 9 V to 75 V. The device is easy to implement and is provided in 8-pin VSSOP and thermally enhanced 8-pin WSON packages.

The converter uses a hysteretic control scheme with a PWM on-time inversely proportional to VIN. This feature allows the operating frequency to remain relatively constant with load and input voltage variations. The hysteretic control requires no loop compensation and provides fast transient response. An intelligent current limit is implemented with forced off-time that is inversely proportional to VOUT. This current limiting scheme ensures short-circuit protection while providing reduced load current foldback. Other protection features include thermal shutdown with automatic recovery, VCC and gate drive undervoltage lockout, and maximum duty cycle limiter.

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Technical documentation

Design & development

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

Hardware development

EVALUATION BOARDS Download
document-generic User guide
25
Description

LM5007 High Voltage (80 V) Step Down Switching Regulator

Features
  • Integrated 80 V, 0.7 A N-Channel Buck Switch
  • Internal HV Vcc Regulator
  • No Control Loop Compensation Required
  • Ultra-Fast Transient Response
  • On Time Varies Inversely with Line Voltage
  • Operating Frequency Nearly Constant with Varying Line Voltage
  • Adjustable Output Voltage
  • Highly Efficient Operation
  • Precision (...)

Design tools & simulation

SIMULATION MODELS Download
SNVM301.ZIP (84 KB) - PSpice Model
SIMULATION MODELS Download
SNVMAL6.ZIP (2 KB) - PSpice Model
SIMULATION TOOLS 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 TOOLS Download

Reference designs

REFERENCE DESIGNS Download
PoE PSE Type 2 (30W) IEEE 802.3at Fully Autonomous Quad Port Solution.
TIDA-00290 A fully autonomous IEEE802.3at, Type 2 (30W) Power-over-Ethernet (PoE) 4 Port Power Sourcing Equipment (PSE) solution. An additional configuration of two non-standard, high power ports (<60W) is provided. Both configurations support Gigabit Ethernet data pass through in 1000BASE-T ports.

This (...)

document-generic Schematic

CAD/CAE symbols

Package Pins Download
VSSOP (DGK) 8 View options
WSON (NGT) 8 View options

Ordering & quality

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