Blog Perusahaan Tentang TI TPSM84338 3.8V To 28V 3A Synchronous Buck Power Module With User Selectable Mode

Shenzhen Mingjiada Electronics Co., Ltd. supplies the TI TPSM84338 3.8V to 28V 3A synchronous buck power supply module, which supports user-selectable operating modes.

The TPSM84338 is a monolithic synchronous buck power module launched by TI, featuring an integrated inductor and bootstrap capacitor. It offers user-selectable operating modes, utilises a HotRod QFN package, and incorporates both high-side and low-side MOSFETs with built-in loop compensation, thereby significantly simplifying power supply hardware design. It is suitable for a wide range of power supply systems, including industrial automation, test and measurement, medical equipment, grid infrastructure, motor drives and other power supply systems, supporting 5V/12V/19V/24V bus power supply scenarios.

I. TPSM84338 Specification Details
1. Basic Electrical Parameters
- Input voltage range: 3.8V to 28V
- Adjustable output voltage: 0.6V to 17V
- Continuous output current: 3A
- Reference accuracy: 0.6V reference, ±1% accuracy across the full temperature range of –40°C to 125°C
- Maximum duty cycle: 98%, supporting low dropout voltage output
- Typical quiescent current: 28μA, excellent power consumption at light loads
- Switching frequency: 200 kHz to 2.2 MHz, configurable via the RT/SYNC pins; supports external clock synchronisation and multi-phase phase-shifted design; features built-in spread-spectrum functionality to optimise EMI performance
- Control architecture: fixed-frequency peak current control with built-in loop compensation; no external compensation network required; fast transient response; excellent linearity and load regulation performance
- Operating junction temperature: –40 °C to +125 °C

2. User-selectable operating modes of the TPSM84338 (configured via the MODE pin)
A key highlight of the TPSM84338 is the ability to implement user-defined light-load operating modes via the MODE pin, allowing on-demand switching between two modes:
- Eco-mode™ (PFM – Pulse Frequency Modulation): Reduces switching frequency under light load conditions, significantly minimising switching losses and lowering quiescent power consumption. Suitable for battery-powered devices and equipment with stringent standby power requirements, enhancing energy efficiency under light load conditions.
- FCCM (Forced Continuous Conduction Mode): Continuous switching at a fixed frequency ensures stable output ripple without frequency fluctuations, whilst providing controllable EMI characteristics. Suitable for noise-sensitive analogue, RF and precision measurement circuits requiring stable clock synchronisation.

The MODE pin can be configured to provide both an adjustable soft-start (SS) function and a power-good (PG) indication. The soft-start suppresses inrush current during power-up, whilst the PG signal is used for system power-up sequencing management, supporting pre-biased start-up to prevent damage to downstream components.

3. Comprehensive Protection Mechanisms (Non-Latching Protection)
A comprehensive suite of power supply protection features is integrated, with fault recovery requiring no power cycle: input under-voltage lockout (UVLO), cycle-by-cycle current limiting + intermittent short-circuit protection (OCP), over-voltage protection (OVP), under-voltage protection (UVP) and over-temperature shutdown (OTP). With an integrated inductor and bootstrap capacitor, only a small number of external input and output ceramic capacitors are required, simplifying PCB layout and saving board space.

II. TPSM84338 Procurement, Selection and Buyer’s Guide
1. TPSM84338 Application Scenarios
- Industrial 24V bus and 12V equipment power supplies requiring step-down to 0.6–17V with a maximum continuous current of 3A
- Precision test instruments and medical equipment, where the FCCM low-ripple mode can be switched on to reduce interference
- Portable devices and battery-powered systems, where Eco-mode can be enabled to reduce standby power consumption
- Multi-rail power supply systems requiring synchronised phase shifting across multiple modules to suppress input ripple and optimise EMI

2. Key Considerations for Selection
1. Voltage Matching: Ensure the bus voltage falls within the 3.8–28 V range and the output voltage within 0.6–17 V; pay attention to the maximum duty cycle capability when the voltage difference is significant.
2. Mode Selection: Choose PFM for power saving under light loads; select FCCM for low-noise, RF or analogue circuits.
3. Switching Frequency: High frequency (>1 MHz) reduces the size of external capacitors, whilst low frequency (200 kHz–500 kHz) reduces switching losses and improves efficiency at medium loads.
4. Thermal Assessment: Maximum junction temperature of 125°C; for high-load applications or enclosed chassis designs, provide a copper heat sink and assess the temperature rise.
5. Timing requirements: If controlled power-up sequencing is required, enable SS soft start + PG signal.

3. Procurement Considerations
1. Part number confirmation: The full part number is TPSM84338. Distinguish between package type and batch; this is the HotRod QFN package. When placing orders, verify the TI original part number to avoid confusion with other models in the same series, such as TPSM84332.
2. Samples and Mass Production: Request samples during the R&D phase and carry out early verification using the TPSM84338EVM evaluation board to confirm operating modes, ripple and temperature rise; for mass production, lock in the batch in advance and verify the datasheet version.
3. Compliance Verification: Cross-check against the original manufacturer’s datasheet and batch traceability documentation; verify component silkscreen markings and packaging to mitigate the risk of refurbished or disassembled components.
4. Supporting Components: Select low-ESR ceramic capacitors for the input and output; minimise the length of the power path during PCB layout to reduce noise.

III. Mingjiada Electronics | TPSM84338 Supply Quality and Delivery Assurance
Shenzhen Mingjiada Electronics Co., Ltd. has specialised in the distribution of electronic components for many years and holds ISO 9001 quality management system certification. We are able to provide a stable supply of TI TPSM84338 power modules. Leveraging our global supply chain network, we offer one-stop component procurement services ranging from R&D samples to high-volume production.

1. Supply Quality Assurance
- Traceability of Genuine Products: Sourced through official TI channels, all TPSM84338 units are brand-new factory-direct components in original packaging, with complete and traceable batch information. Visual, silkscreen and electrical spot checks are carried out prior to warehousing to eliminate loose new, refurbished or disassembled components, ensuring that the power module’s electrical performance, protection functions and mode-switching capabilities comply with TI specification requirements.
- Professional Quality Control: We have established a component intake inspection process, focusing on key parameters of power modules such as quiescent current, output voltage regulation accuracy, MODE switching and protection functions, to prevent defective materials from entering projects.
- Documentation Support: Alongside supply, we provide datasheets, application notes and evaluation materials. Our technical team assists customers with component selection and offers technical advice on mode configuration, frequency settings and PCB layout, helping customers to rapidly complete power supply design verification.

2. Delivery Capability
- Multi-warehouse Stocking: Coordinated operations across dual warehouses in Shenzhen and Hong Kong, with TPSM84338 kept in stock at all times, supporting sample, small-batch, medium-batch and large-volume orders to accommodate the entire lifecycle from R&D prototyping through trial production to mass production.
- Flexible Lead Times: Standard stock orders are dispatched within 1–3 days; urgent orders can be dispatched rapidly, with shipping arranged within 24 hours to mitigate the risk of stock shortages for client projects; forward orders can have delivery dates locked in and production scheduled in advance to avoid market price increases and supply disruptions.
- One-stop supply chain services: In addition to supplying TI power management devices, we also offer stock buy-back services, enabling customers to recycle project offcuts, idle power ICs and component stock to free up assets; we also cover the procurement of components from a wide range of brands.
- Procurement flexibility: We support sample purchases starting from a single unit; bulk orders benefit from tiered pricing; and we support settlement in multiple currencies to accommodate the procurement needs of both domestic and overseas customers.

3. Other models offered by the company:

IV. TPSM84338 Product Summary
With a wide input voltage range of 3.8–28 V, a 3 A output, freely switchable PFM/FCCM dual operating modes, and an integrated inductor module design, the TPSM84338 significantly shortens power supply development cycles whilst balancing energy efficiency and noise performance. It is the preferred solution for step-down power supplies in industrial, test and measurement, and medical equipment applications. As a specialist supplier of electronic components, Mingjiada Electronics can reliably supply genuine TPSM84338 components, offering a comprehensive procurement service that includes quality verification, technical selection and rapid delivery, thereby helping customers to successfully implement their projects.