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Product Detailed Parameters
- Description：IC VREF SERIES 0.5% 8MINISO
- Series：-
- Mfr：STMicroelectronics
- Package：Tape & Reel (TR)
- Output Type：Fixed
- Voltage - Output (Min/Fixed)：1.25V
- Voltage - Output (Max)：-
- Current - Output：2.5 mA
- Operating Temperature：-40°C ~ 105°C (TA)
- Mounting Type：Surface Mount
- Package / Case：8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Supplier Device Package：8-MiniSO
- Grade：-
- Qualification：-
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Overview
The TSM1014AIST is a highly integrated constant voltage and constant current controller for switch-mode power supplies. It integrates one fixed 1.25V voltage reference with 0.5% precision and two transconductance operational amplifiers. The device operates within a supply voltage range of 4.5V to 28V and supports an operating temperature range of -40°C to +105°C. Total supply current consumption is typically 180µA at 18V. It features a current sink output stage, high AC mains voltage rejection (100dB), and 2kV ESD protection.
Feature Summary
- Integrates a precise 1.25V voltage reference and dual transconductance operational amplifiers for combined voltage and current regulation.
- Features a common current sink output stage that enables ORing functionality for simultaneous control loops.
- Provides high AC mains voltage rejection and robust electrostatic discharge protection.
- Designed for low external component count and easy compensation in compact designs.
Applications
- Adapters
- Battery chargers
Procurement Notes
Verify the specific ordering suffix 'A' indicates 0.5% voltage reference precision and 'IST' denotes the MiniSO-8 tape and reel packaging. Confirm the manufacturer part number matches STMicroelectronics documentation. Ensure the intended application falls within the specified electrical limits and temperature ranges before finalizing procurement.
Selection Notes
Select this component when a single IC solution is required for both voltage and current limiting in flyback converters. The 0.5% reference precision suits applications demanding tight voltage regulation. Consider the MiniSO-8 package for space-constrained layouts. Verify that primary side current limitation is sufficient for start-up conditions as secondary regulation relies on system Vcc.
Part Context
This part belongs to the TSM1014 family of low consumption voltage and current controllers. The 'A' suffix specifies the tighter 0.5% voltage reference tolerance compared to the standard 1% variant. The 'IST' suffix identifies the MiniSO-8 plastic micropackage configuration supplied in tape and reel format for automated assembly.
Replacement Considerations
TSM1014ID: Standard SO-8 package with 1% reference precision. TSM1014AID: SO-8 package with 0.5% reference precision. TSM1014IST: MiniSO-8 package with 1% reference precision. TSM1014AIDT: SO-8 tape and reel with 0.5% reference precision.
FAQ
How does the TSM1014 handle current and voltage regulation simultaneously?
It uses two transconductance operational amplifiers with common current sink outputs. This creates an ORing function where whichever loop reaches its limit first activates the optocoupler feedback.
What is the purpose of the internal Zener clamp?
The internal Zener clamp protects the device from overvoltage on the Vcc pin, which can occur up to twice the regulated line voltage if using a low-cost auxiliary power supply without additional windings.
