L5973ADTR
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STMicroelectronics L5973ADTR

Manufacturer No:
L5973ADTR
Manufacturer:
STMicroelectronics
Package:
Tape & Reel (TR)
Description:
IC REG BUCK ADJUSTABLE 2A 8HSOP
Delivery:
Payment:
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iso45001
iso9001
iso13485

Product Introduction

Overview

The L5973ADTR, produced by STMicroelectronics, is a step-down monolithic power switching regulator. This device features a switch current limit of 2 A, enabling it to deliver more than 1.5 A DC current to the load, depending on the application conditions. The output voltage can be adjusted from 1.235 V to 35 V, making it versatile for various applications. The regulator is housed in a PowerSO-8 package with an exposed frame, which helps reduce thermal resistance to approximately 40 °C/W. It includes an internal P-Channel D-MOS transistor with a typical on-resistance of 200 mΩ, eliminating the need for a bootstrap capacitor and ensuring high efficiency. The internal oscillator fixes the switching frequency at 500 kHz, minimizing the size of external components.

Key Specifications

Parameter Value Unit
Switch Current Limit 2 A A
Operating Input Voltage Range 4 V to 36 V V
Output Voltage Range 1.235 V to 35 V V
Reference Voltage 3.3 V (±2%) V
Switching Frequency 500 kHz kHz
Mosfet On Resistance 200 mΩ
Maximum Thermal Resistance (Junction-Ambient) 40 °C/W °C/W
Operating Junction Temperature Range -40 to 150 °C °C

Key Features

  • Inhibit for zero current consumption
  • Internal current limiting
  • Protection against feedback disconnection
  • Synchronization
  • Thermal shutdown
  • Voltage feedforward
  • Low dropout operation: 100% duty cycle
  • Zero load current operation
  • Internal P-Channel D-MOS transistor with a typical on-resistance of 200 mΩ

Applications

  • Consumer: Set-top boxes, DVD players, TVs, VCRs, car radios, LCD monitors
  • Networking: XDSL, modems, DC-DC modules
  • Computer: Printers, audio/graphic cards, optical storage, hard disk drives
  • Industrial: Chargers, car battery, DC-DC converters

Q & A

  1. What is the switch current limit of the L5973ADTR?

    The switch current limit of the L5973ADTR is 2 A.

  2. What is the operating input voltage range of the L5973ADTR?

    The operating input voltage range is from 4 V to 36 V.

  3. What is the adjustable output voltage range of the L5973ADTR?

    The output voltage can be adjusted from 1.235 V to 35 V.

  4. What is the switching frequency of the L5973ADTR?

    The switching frequency is internally fixed at 500 kHz.

  5. Does the L5973ADTR have thermal shutdown protection?
  6. Can the L5973ADTR be synchronized with an external signal?
  7. What is the typical on-resistance of the internal P-Channel D-MOS transistor?

    The typical on-resistance is 200 mΩ.

  8. What is the maximum thermal resistance (junction-ambient) of the L5973ADTR?

    The maximum thermal resistance is approximately 40 °C/W.

  9. What are some common applications for the L5973ADTR?

    Common applications include consumer electronics, networking devices, computer peripherals, and industrial equipment.

  10. Does the L5973ADTR have protection against feedback disconnection?

Product Attributes

Function:Step-Down
Output Configuration:Positive
Topology:Buck
Output Type:Adjustable
Number of Outputs:1
Voltage - Input (Min):4V
Voltage - Input (Max):36V
Voltage - Output (Min/Fixed):1.235V
Voltage - Output (Max):35V
Current - Output:2A
Frequency - Switching:500kHz
Synchronous Rectifier:No
Operating Temperature:-40°C ~ 150°C (TJ)
Mounting Type:Surface Mount
Package / Case:8-SOIC (0.154", 3.90mm Width) Exposed Pad
Supplier Device Package:8-HSOP
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IC REG BUCK ADJUSTABLE 2A 8HSOP

Similar Products

Part Number L5973ADTR L5970ADTR
Manufacturer STMicroelectronics STMicroelectronics
Product Status Active Active
Function Step-Down Step-Down
Output Configuration Positive Positive
Topology Buck Buck
Output Type Adjustable Adjustable
Number of Outputs 1 1
Voltage - Input (Min) 4V 4.4V
Voltage - Input (Max) 36V 36V
Voltage - Output (Min/Fixed) 1.235V 1.235V
Voltage - Output (Max) 35V 35V
Current - Output 2A 1.5A
Frequency - Switching 500kHz 500kHz
Synchronous Rectifier No No
Operating Temperature -40°C ~ 150°C (TJ) -40°C ~ 150°C (TJ)
Mounting Type Surface Mount Surface Mount
Package / Case 8-SOIC (0.154", 3.90mm Width) Exposed Pad 8-SOIC (0.154", 3.90mm Width)
Supplier Device Package 8-HSOP 8-SOIC

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