L5971D
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STMicroelectronics L5971D

Manufacturer No:
L5971D
Manufacturer:
STMicroelectronics
Package:
Tube
Description:
IC REG BUCK ADJ 1.5A 16SOIC
Delivery:
Payment:
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Product Introduction

Overview

The L5970D is a step-down monolithic power switching regulator designed by STMicroelectronics. It is capable of delivering up to 1A of output current at output voltages ranging from 1.2V to 35V. This regulator is particularly suited for applications requiring high efficiency and reliability, such as consumer electronics, networking devices, and industrial equipment.

Key Specifications

ParameterMinTypMaxUnit
Operating Input Voltage4.436V
Output Current1A
Output Voltage Range1.235V
Switching Frequency212250280KHz
Mosfet On Resistance0.2500.5
Maximum Junction Temperature150°C
Power Dissipation at TA ≤ 60°C0.75W

Key Features

  • Up to 1A output current
  • Operating input voltage from 4.4V to 36V
  • 3.3V (±2%) reference voltage
  • Output voltage adjustable from 1.2V to 35V
  • Low dropout operation: 100% duty cycle
  • 250KHz internally fixed frequency
  • Voltage feedforward and zero load current operation
  • Internal current limiting and inhibit for zero current consumption
  • Synchronization and protection against feedback disconnection
  • Thermal shutdown

Applications

  • Consumer electronics: STB, DVD, TV, VCR, car radio, LCD monitors
  • Networking: XDSL, modems, DC-DC modules
  • Computer peripherals: printers, audio/graphic cards, optical storage, hard disk drive
  • Industrial applications: chargers, car battery, DC-DC converters

Q & A

  1. What is the maximum output current of the L5970D?
    The L5970D can deliver up to 1A of output current.
  2. What is the operating input voltage range of the L5970D?
    The operating input voltage range is from 4.4V to 36V.
  3. What is the adjustable output voltage range of the L5970D?
    The output voltage can be adjusted from 1.2V to 35V.
  4. What is the switching frequency of the L5970D?
    The switching frequency is internally fixed at 250KHz.
  5. Does the L5970D have thermal shutdown protection?
    Yes, the L5970D includes thermal shutdown protection.
  6. How does the inhibit function work on the L5970D?
    The inhibit function disables the device when the INH pin is set high (above 2.2V); if not used, the pin must be grounded.
  7. What is the typical on-resistance of the Mosfet in the L5970D?
    The typical on-resistance of the Mosfet is 0.250 Ω.
  8. Can the L5970D operate in synchronization with other regulators?
    Yes, the L5970D has a synchronization feature.
  9. What is the maximum junction temperature for the L5970D?
    The maximum junction temperature is 150°C.
  10. What type of package is the L5970D available in?
    The L5970D is available in an SO-8 package.

Product Attributes

Function:Step-Down
Output Configuration:Positive
Topology:Buck
Output Type:Adjustable
Number of Outputs:1
Voltage - Input (Min):6.5V
Voltage - Input (Max):28V
Voltage - Output (Min/Fixed):1.26V
Voltage - Output (Max):20V
Current - Output:1.5A
Frequency - Switching:100kHz ~ 300kHz
Synchronous Rectifier:No
Operating Temperature:-40°C ~ 150°C (TJ)
Mounting Type:Surface Mount
Package / Case:16-SOIC (0.295", 7.50mm Width)
Supplier Device Package:16-SO W
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Similar Products

Part Number L5971D L5972D L5973D L4971D L5970D
Manufacturer STMicroelectronics STMicroelectronics STMicroelectronics STMicroelectronics STMicroelectronics
Product Status Obsolete Active Active Active Active
Function Step-Down Step-Down Step-Down Step-Down Step-Down
Output Configuration Positive Positive Positive Positive Positive
Topology Buck Buck Buck Buck Buck
Output Type Adjustable Adjustable Adjustable Adjustable Adjustable
Number of Outputs 1 1 1 1 1
Voltage - Input (Min) 6.5V 4.4V 4V 8V 4.4V
Voltage - Input (Max) 28V 36V 36V 55V 36V
Voltage - Output (Min/Fixed) 1.26V 1.235V 1.235V 3.3V 1.2V
Voltage - Output (Max) 20V 35V 35V 50V 35V
Current - Output 1.5A 2A 2.5A 1.5A 1A
Frequency - Switching 100kHz ~ 300kHz 250kHz 250kHz 100kHz ~ 300kHz 250kHz
Synchronous Rectifier No No No No No
Operating Temperature -40°C ~ 150°C (TJ) -40°C ~ 150°C (TJ) -40°C ~ 150°C (TJ) -40°C ~ 150°C (TJ) -40°C ~ 150°C (TJ)
Mounting Type Surface Mount Surface Mount Surface Mount Surface Mount Surface Mount
Package / Case 16-SOIC (0.295", 7.50mm Width) 8-SOIC (0.154", 3.90mm Width) 8-SOIC (0.154", 3.90mm Width) Exposed Pad 16-SOIC (0.295", 7.50mm Width) 8-SOIC (0.154", 3.90mm Width)
Supplier Device Package 16-SO W 8-SOIC 8-HSOP 16-SO W 8-SOIC

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