TPSM828303 - 3A Low-EMI Buck Module 2.25-5.5V | Texas Instruments
MPN: TPSM828303 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.35 | $2.35 |
| 10 | $2.09 | $20.90 |
| 100 | $1.79 | $179.00 |
| 500 | $1.55 | $775.00 |
| 1,000 | $1.38 | $1,380.00 |
TPSM828303 Overview
A DC/DC power module is a complete point-of-load power supply that integrates the controller, power MOSFETs, inductor, and compensation into a single surface-mount package. As a member of the buck (step-down) converter family within the broader power management IC hierarchy, it efficiently reduces a higher input voltage to a lower output voltage while minimizing external component count, layout effort, and design risk compared to discrete converter solutions.
Key features include the DCS-Control topology for fast load transient response with small output capacitance, 1% feedback voltage accuracy over the full operating range, and integrated EMI reduction technologies that ease radiated emissions compliance. Automatic PWM/PFM transition maximizes light-load efficiency, and enable, power good, output discharge, and overcurrent protection functions simplify system integration.
The TPSM828303 is pin-to-pin compatible with the 1A (TPSM828301) and 2A (TPSM828302) family members, enabling current-rating scalability on one PCB layout. The integrated inductor with MagPack magnetic shielding (TPSM828303APVCBR variant) reduces radiated EMI and board area versus discrete designs. Operation over a -40C to +125C junction range suits industrial environments.
Typical applications include point-of-load (POL) power for FPGAs, DSPs, and ASICs, optical module supplies, test and measurement equipment, and noise-sensitive portable designs where low EMI is mandatory.
Design tip: follow the datasheet input/output capacitance recommendations - the DCS-Control topology supports output capacitors up to 200uF, and the EN pin plus power good signal enable proper rail sequencing in multi-rail systems. Prices as of 2026-08-30.
Drop-in alternatives for TPSM828303 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with TPSM828303 (same form factor and footprint) — differing in Input Voltage Range, Output Voltage Range, Package, Protection Features, Topology.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
TPSM828302ARDSR
✅ Drop-In📋 Reference alternative (not in catalog)
TPSM828301ARDSR
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
TPSM828303 Maximum Ratings & Electrical Characteristics
| Topology | Synchronous step-down (buck) module |
| Input Voltage Range | 2.25 V to 5.5 V |
| Output Voltage Range | 0.5 V to 4.5 V |
| Output Current | 3 A |
| Feedback Voltage Accuracy | 1% over full operating range |
| Control Topology | DCS-Control |
| Light Load Mode | Automatic PWM/PFM transition |
| Integrated Inductor | Yes (MagPack shielding on PVC variant) |
| Maximum Output Capacitance | 200 uF |
| Protection Features | Overcurrent, output discharge, power good |
| Enable Pin | Yes |
| EMI Features | Low-EMI design, EMI reduction technologies |
| Operating Junction Temperature | -40C to +125C |
| Package | QFN-FCMOD-9 (3x3 mm) / MagPack |
| Mounting Type | Surface Mount |
| Family Compatibility | Pin-to-pin compatible with TPSM828301 (1A) and TPSM828302 (2A) |
TPSM828303 Pin Configuration
| Pin 1 | EN — Enable input, active high |
| Pin 2 | GND — Ground |
| Pin 3 | VOS — Output voltage sense / feedback |
| Pin 4 | SS/TR — Soft start / tracking [DATA_NEEDED: exact pin mapping] |
| Pin 5 | PGOOD — Power good indicator |
| Pin 6 | VIN — Input supply |
| Pin 7 | L1 — Integrated inductor node [DATA_NEEDED: exact pin mapping] |
| Pin 8 | SW/VOUT — Switch node / output [DATA_NEEDED: exact pin mapping] |
| Pin 9 | GND (EP) — Exposed pad, thermal and ground |
Typical Applications
TPSM828303 is suitable for 6 applications: FPGA/DSP Point-of-Load Power, Optical Module Supplies, Test and Measurement Equipment, Portable and Noise-Sensitive Designs, Industrial Automation POL, Low-EMI Radar and RF Subsystems.
FPGA/DSP Point-of-Load Power
The TPSM828303's DCS-Control topology delivers fast load transient response with only small output capacitance (up to 200uF supported), which is critical for FPGA and DSP core rails with steep load steps. The 3A rating covers mid-size core rails, and the power good flag plus EN pin support multi-rail sequencing. Placed directly at the load in a 3x3 mm footprint, the integrated inductor saves layout area while the 1% feedback accuracy holds tight core-voltage tolerances.
Recommended
Optical Module Supplies
Optical transceiver modules demand compact, low-noise power in tight form factors. The TPSM828303's integrated shielded inductor and low-EMI technologies minimize switching noise that could couple into sensitive laser driver and TIA circuits. Its 2.25V-5.5V input accepts standard 3.3V/5V rails, and the 0.5V-4.5V adjustable output covers laser and DSP supply needs in a small QFN footprint with minimal external parts.
Recommended
Test and Measurement Equipment
Instruments require clean, stable local rails with low radiated noise so measurement front ends are not disturbed. The TPSM828303's low-EMI design, automatic PWM/PFM transition for high light-load efficiency, and overcurrent protection make it a robust POL choice. Its fast DCS-Control transient response also handles the dynamic loads typical of switching instrument subsystems and logic blocks.
Recommended
Portable and Noise-Sensitive Designs
Battery-adjacent 5V or 3.3V input designs benefit from the TPSM828303's light-load efficiency via automatic PWM/PFM transition and its low-EMI shielding. The integrated inductor shrinks solution height and area for handheld and wearable form factors, while output discharge simplifies power-down behavior. With output voltage down to 0.5V, it supports modern low-voltage processors and sensor rails.
Recommended
Industrial Automation POL
The -40C to +125C operating junction range and integrated overcurrent protection suit factory automation controllers and sensor hubs. The TPSM828303 steps 5V logic rails down to processor and I/O voltages with 1% accuracy, and its pin-to-pin family (1A/2A/3A) lets one PCB layout scale to different load points. EMI reduction technologies help meet industrial radiated-emissions requirements.
Recommended
Low-EMI Radar and RF Subsystems
RF and radar front ends are highly sensitive to switching noise. The TPSM828303, especially the MagPack-shielded TPSM828303APVCBR variant, minimizes radiated emissions at the source, simplifying compliance. DCS-Control keeps rail ripple low during pulsed transmit loads typical of radar transmitters, and the EN/power good pair enables clean transmit/receive rail sequencing.
Recommended
Recommended Products Summary
Engineering reference data for TPSM828303 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TPSM828302ARDSR | TPSM828301ARDSR | TPSM82823 |
|---|---|---|---|---|
| Package | QFN-FCMOD-9 (3x3 mm) / MagPack | QFN-FCMOD-9 (3x3 mm) - same | QFN-FCMOD-9 (3x3 mm) - same | Different module package |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Output Current | 3 A | 2 A | 1 A | 3 A (external inductor) |
| Input Voltage Range | 2.25 V to 5.5 V | 2.25 V to 5.5 V | 2.25 V to 5.5 V | 2.2 V to 5.5 V |
| Integrated Inductor | Yes | Yes | Yes | No - external inductor required |
| Pin-to-Pin Compatibility | Family standard (TPSM82830x) | Pin-to-pin compatible | Pin-to-pin compatible | Not pin-compatible |
Key Differentiators
- 3A current rating on family footprint (vs TPSM828302ARDSR)
- MagPack shielded-inductor variant available (vs TPS628303)
- DCS-Control fast transient response (vs TPSM82823)
Design Notes
Place input capacitance as close to VIN/GND as possible; follow the datasheet recommended layout in section on PCB layout of TI TPSM828303 datasheet. The exposed pad must be soldered to a solid ground plane for thermal dissipation and low EMI. Since the inductor is integrated, no switch-node routing is needed, but keep the output sense (VOS) trace Kelvin-routed to the output capacitor for the full 1% accuracy benefit.
The DCS-Control topology supports output capacitance up to 200uF, which lets you trade transient response against board area. Size input capacitors for a 5.5V maximum input with adequate ripple current rating. Avoid large VIN-VOUT deltas at full 3A load without verifying junction temperature per datasheet thermal derating curves.
Do not exceed the 5.5V absolute maximum input. For multi-rail systems, use the EN pin with external sequencing logic or the SS/TR soft-start pin to control startup; verify power good assertion delay against downstream load requirements. When substituting between TPSM828301/02/03 on a shared layout, recheck inductor saturation and thermal limits at the higher current ratings.
Compliance Information
RoHS status per TI product page; confirm exact compliance per ordering suffix on ti.com quality pages.
