Core specifications
The TPSM82821ASILR, part of the TPSM8282x MicroSiP™ power module family, is a non-isolated point-of-load (PoL) step-down DC converter.Its key parameters are as follows:
voltage and current: Input voltage range2.4V to 5.5V, the output voltage can be at0.6V to 4VFlexible adjustment between1Amaximum output current.
Efficiency vs. switching frequency: Conversion efficiency as high as95%, fixed4MHzThe switching frequency allows the use of small external components, effectively reducing the overall solution size.
Power consumption and features:Typical quiescent current only4µA, supports DCS-Control™ topology, providing excellent load transient response and precise output regulation.Integrated functions such as soft start, output discharge, overcurrent protection, overheating protection and power supply normal indication.
Packaging and temperature:Adopt10-pin μSiL package, size only2.5mm×2.0mm×1.1mm, the overall solution size can be controlled withinWithin 12mm².Operating temperature range-40℃ to 125℃。
The device is available in both fixed output voltage versions (1.2V, 1.8V, 2.5V, 3.3V) and adjustable output voltage versions, with the latter setting the output voltage through an external resistor divider for greater flexibility.
Core advantage: Modular design releases hardware design flexibility
The greatest value of TPSM82821ASILR in product design is concentrated in the combination of high integration and ultra-small size.Compared with traditional discrete buck solutions, it integrates the synchronous buck converter and the inductor in one package, significantly reducing the number of external components and simplifying PCB layout.The overall solution size is only 12mm², which means that engineers can use less PCB area to implement complete power functions for scenarios where space is extremely limited, such as optical modules and handheld devices.
The high switching frequency of 4MHz allows the use of smaller input and output capacitors, further compressing the size of the peripheral circuit while meeting ripple requirements.Force PWMThe operating mode ensures continuous conduction mode is maintained under all load conditions, keeping output voltage ripple to a minimum.The ultra-low quiescent current of 4µA combined with the peak efficiency of 95% can maintain high conversion efficiency under both light and heavy load conditions. For battery-powered portable devices and IoT terminals that require long-term standby, this directly translates into longer battery life.The DCS-Control topology ensures fast transient response and minimal output voltage fluctuations when the load changes, providing reliable power supply guarantee for core devices such as FPGAs and ASICs that are sensitive to power supply stability.
Typical application scenarios
The application fields of TPSM82821ASILR are highly overlapped with industrial automation, optical communications and embedded systems.
Optical modules and optical communication equipmentIt is one of its core application directions.In optical modules and optical transceivers, the PCB space is extremely limited, and the requirements for noise and ripple of the power supply are extremely strict.The modular design and small-size packaging of TPSM82821ASILR enable it to fit closely into the optical device layout. The 4MHz high-frequency switch effectively reduces EMI interference and meets the strict requirements of low-noise power supply for optical communication equipment.
Machine Vision and Industrial PCThis chip is also widely used.Industrial cameras, smart code readers and embedded vision systems need to process image acquisition and algorithm calculations on compact boards at the same time, and the demand for multi-channel low-voltage power supply is growing.The chip's highly integrated design makes it ideal for powering FPGAs and image sensors in such devices.
Industrial Control and PLCIn terms of programmable logic controllers, industrial gateways and remote I/O modules, the 24V bus voltage needs to be reduced to 3.3V or 1.8V to power MCUs and communication chips.The TPSM82821ASILR's wide input voltage range and high efficiency of 95% make it qualified for this type of task.inWired network equipment, it can also be used for auxiliary power supply for Ethernet switches, routers, gateways and other equipment.
Portable and battery-operated equipmentIt is also its high frequency application field.The 4µA quiescent current combined with 95% peak efficiency provides longer battery life for handheld test instruments, portable medical equipment and battery-powered sensor nodes.
Model selection comparison
TPSM82821ASILR belongs to TI's TPSM8282x series of power modules. The same series provides a wealth of current levels and functional branches for project selection.
Same series but different current levels: If you need larger output current, you can chooseTPSM82822(Version 2A) orTPSM82823(3A version), the three use the same package and pin layout, and the project current specifications can be flexibly adjusted without modifying the PCB.
Same series but different working modes: The standard model TPSM82821 can automatically enter power saving mode to maintain high efficiency under light load conditions.TPSM82821AFor the forced PWM version, continuous conduction mode is maintained under all load conditions to keep output voltage ripple to a minimum.
Function selection of the same series: If your project requires a fixed output voltage rather than an adjustable version, the TPSM8282x series provides1.2V, 1.8V, 2.5V and 3.3VThe fixed output option further reduces external feedback resistors and simplifies design.
Evaluation boards of the same series：TPSM82821AEVM-127The evaluation module can convert 2.4V to 5.5V input into a 1.8V regulated output, which is suitable for rapid verification and performance evaluation in the early stage of the project.
Cross-brand alternative selection: There are limited solutions for ultra-small step-down power modules of the same type on the market, and the main alternative paths include MPS’s similar Micro Module series.However, due to differences in package size, pin definitions and functional characteristics between manufacturers, key parameters such as PCB layout compatibility, output voltage range and switching frequency need to be carefully checked when replacing, and sufficient electrical verification must be completed before mass production.
write at the end
Texas Instruments TPSM82821ASILR uses 4MHz high-frequency switching, 2.5mm×2.0mm ultra-small package, 95% peak efficiency and 4µA quiescent current to provide a highly integrated step-down power supply solution for space-constrained applications such as optical modules, machine vision, industrial control and portable equipment.The modular design that integrates the inductor and converter in the same package changes the power supply design from cumbersome discrete component selection and layout optimization to a high-efficiency solution that can be solved with one chip.
As a chip agent distributor that has been deeply involved in the electronic components industry since 2011, Shenzhen Hongmai Electronics Co., Ltd. has long-term stock of TI TPSM82821ASILR and TPSM8282x series full-model power modules in original stock. It also supplies TPSM82822 (2A), TPSM82823 (3A) and other different current level versions, and supports factory batch direct shipment, small batch samples and technical selection assistance.If you need to inquire about prices or need to know the selection suggestions of different current levels and working modes of the same series, please feel free to contact us (tel: 0755-23815611, QQ 2355878270).Shenzhen Hongmai Electronics Co., Ltd.
