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LTC3128EUFD The LTC3128EUFD is a 3A monolithic buck-boost switching regulator designed specifically for charging and balancing supercapacitors. It features an accurate programmable input current limit and operates over a wide input voltage range of 1.73V to 5.5V.
Mfr Part #:

LTC3128EUFD

Available from 1 distributors
Mfr Name: LT
LT
The LTC3128EUFD is a 3A monolithic buck-boost switching regulator designed specifically for charging and balancing supercapacitors. It features an accurate programmable input current limit and operates over a wide input voltage range of 1.73V to 5.5V.
✓ Total Stock: 95 pcs

LTC3128EUFD Available from 1 distributor

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✓ Non-Authorised
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Optech Co.,Limited ✓
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95 pcs
On Request
95 pcs On Request 1 On Request On Request 11+ On Request On Request
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LTC3128EUFD Specifications Quick View

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LTC3128EUFD Description

Short technical summary and product information.

The LTC3128EUFD is a highly integrated power management IC tailored for supercapacitor applications. Functioning as a buck-boost switching regulator, it efficiently charges single or stacked supercapacitors while actively balancing cell voltages to ensure optimal performance and longevity. The device supports a wide input voltage range from 1.73V to 5.5V and delivers a maximum output current of 3A. Its programmable average input current limit allows precise control during charging cycles, preventing overload on upstream power sources. Designed for surface-mount assembly in a compact 20-WFQFN package, the LTC3128EUFD integrates burst mode operation, output disconnect, and power good indicators. With low quiescent currents in shutdown and active modes, it maximizes system efficiency for battery-backed memory, industrial controls, and energy harvesting systems requiring reliable supercapacitor backup.

LTC3128EUFD Quick Information

Product Type: Supercapacitor Charger IC
Series: LTC3128
Canonical Name: LTC3128EUFD#PBF
Subcategory: Supercapacitor Chargers

LTC3128EUFD Compliance

RoHS Status: RoHS Compliant
Moisture Sensitivity Level (MSL): 1 Unlimited
REACH Status: REACH Unaffected

LTC3128EUFD Features

  • 3A buck-boost supercapacitor charger and balancer
  • Programmable input current limit up to 3A
  • Wide 1.73V to 5.5V input voltage range
  • Active charge balancing for unmatched capacitors
  • Low 0.4µA shutdown quiescent current

LTC3128EUFD Applications

  • Backup power for real-time clock circuits
  • Energy harvesting system storage interfaces
  • Industrial control memory retention supplies
  • Automotive event data recorder backups
  • Uninterruptible power supply buffer stages

LTC3128EUFD FAQs

6 frequently asked questions generated from this part’s specifications.
What is the input voltage range of the LTC3128EUFD?

The input voltage range is 1.73V to 5.5V.

What is the output voltage range of the LTC3128EUFD?

The output voltage range is 1.8V to 5.5V.

What is the maximum output current of the LTC3128EUFD?

The maximum output current is 3A.

What is the operating temperature range of the LTC3128EUFD?

The operating temperature range is 0°C to 85°C.

What package does the LTC3128EUFD come in?

The LTC3128EUFD is available in a 20-WFQFN exposed pad package.

What is the quiescent current of the LTC3128EUFD in active mode?

The active quiescent current is 600µA.

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