DSPIC33FJ09GS302T-E/MX - 16-bit DSC, 9KB Flash, QFN-28 | Microchip
MPN: DSPIC33FJ09GS302T-E/MX ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.29 | $4.29 |
| 10 | $4.12 | $41.20 |
| 100 | $4.05 | $405.00 |
| 500 | $3.98 | $1,990.00 |
| 1,000 | $3.93 | $3,930.00 |
DSPIC33FJ09GS302T-E/MX Overview
A digital signal controller combines the computational throughput of a 16-bit MCU with DSP-grade math acceleration on a single die. Within the power-management hierarchy, the dsPIC33FJ GS family sits at the silicon level of switch-mode power conversion systems, where a DSC executes the control loop (PFC, LLC, buck/boost) that analog controllers once performed in hardwired form.
Key features include a dsPIC33FJ core executing up to 40 MIPS, dedicated SMPS peripherals for multi-loop digital power supplies, 9KB of 24-bit-wide FLASH program storage, and 1KB of data RAM. The extended temperature range (-40C to +125C) supports automotive-adjacent and industrial power environments.
Architecturally, the device pairs a 16-bit pipelined core with DSP instructions (barrel shifter, 24-bit data paths, dual operand fetch) that accelerate proportional-integral control loops and trigonometric transformations common in digital power and motor control firmware.
Typical applications include AC-DC converters, DC-DC converters, power factor correction (PFC) stages, uninterruptible power supplies, and battery charging systems, where the controller provides the feedback loop math at kilohertz-to-hundreds-of-kilohertz switching frequencies.
Design consideration: the 3.0V to 3.6V supply window is strict - provide a clean 3.3V LDO or buck-derived rail with local 0.1uF decoupling at every VDD/VSS pair, and keep the switched-node traces away from analog feedback inputs.
This page adds value beyond the manufacturer datasheet by consolidating verified distributor pricing, drop-in same-family alternatives, application guidance, and design notes in one AI-citable reference.
Drop-in alternatives for DSPIC33FJ09GS302T-E/MX — 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 DSPIC33FJ09GS302T-E/MX (same form factor and footprint) — differing in Core Architecture, Mounting Type, Package, RoHS Status.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33FJ09GS302-I/MM
✅ Drop-In✓ In Stock
$2.11 / Unit
View Datasheet →DSPIC33FJ09GS302T-E/MM
✅ Drop-In📋 Reference alternative (not in catalog)
DSPIC33FJ09GS302T-I/MX
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33FJ09GS302T-E/MX Maximum Ratings & Electrical Characteristics
| Core Processor | dsPIC33FJ (16-bit) |
| Program Memory Size | 9KB (Built-in FLASH) |
| Data RAM Size | 1KB |
| Core Architecture | 16-bit DSP/MCU |
| Operating Supply Voltage | 3 V to 3.6 V |
| Operating Temperature | -40C to +125C |
| Package | QFN-28-EP (6x6 mm) |
| Mounting Type | Surface Mount (SMD/SMT) |
| Packaging | Reel (Tape & Reel) |
| Application Focus | SMPS and digital power conversion peripherals |
| Maximum CPU Performance | 40 MIPS (dsPIC33FJ family) |
| Product Category | Digital Signal Processors & Controllers - DSP, DSC |
| RoHS Status | ROHS compliant |
DSPIC33FJ09GS302T-E/MX qfn-28-ep (6x6 mm) Pin Configuration Guide
Pin configuration for DSPIC33FJ09GS302T-E/MX (qfn-28-ep (6x6 mm) package). This digital IC includes GPIO, communication interfaces (UART, SPI, I2C), and power pins. Refer to the manufacturer datasheet for alternate pin functions and configuration options. Essential for embedded system design and PCB layout.
No detailed pinout data available for DSPIC33FJ09GS302T-E/MX.
Refer to the datasheet for full pin configuration.
Typical Applications
DSPIC33FJ09GS302T-E/MX is suitable for 6 applications: AC-DC Converter Control, Power Factor Correction (PFC), DC-DC Converter (Buck/Boost/LLC), Uninterruptible Power Supplies (UPS), Industrial Battery Chargers, Digital Power Development and Prototyping.
AC-DC Converter Control
In off-line AC-DC converters, the DSPIC33FJ09GS302T-E/MX closes the output-voltage and current-mode loops digitally using its dsPIC33FJ core running up to 40 MIPS with DSP multiply-accumulate instructions. The GS-family SMPS peripherals generate the PWM gating for the primary-side switch while ADC feedback channels sample output voltage and current each switching cycle. Because control coefficients are firmware rather than fixed analog networks, compensation can adapt to load transients and line conditions. The extended -40C to +125C temperature range suits sealed adapter enclosures where ambient near the controller can exceed +85C. Place the controller on the low-voltage side with opto- or digital-isolated feedback, and budget the 9KB FLASH across control law, housekeeping, and protection state machines - typically sufficient for single-output designs of moderate complexity.
Recommended
Power Factor Correction (PFC)
The DSPIC33FJ09GS302T-E/MX implements average-current-mode PFC control, computing a current reference from the rectified line waveform and closing the inner inductor-current loop each switching cycle. Microchip's Interleaved PFC reference design for the GS family demonstrates this controller driving a universal-input stage producing a high-voltage DC output up to 350W. The DSC approach removes the multiplier and error-amplifier discretes of analog PFC ICs, and the 3V to 3.6V digital core tolerates supply variation in auxiliary bias rails. Use the PWM peripheral for the boost switch and the ADC with configurable sample triggers synchronized to the PWM period to minimize switching-noise corruption of current-sense readings. The 1KB RAM holds per-cycle control state and low-frequency outer-loop history comfortably, and firmware soft-start eliminates the large start-up inrush capacitors analog designs require.
Recommended
DC-DC Converter (Buck/Boost/LLC)
For point-of-load and intermediate-bus DC-DC stages, the DSPIC33FJ09GS302T-E/MX runs digital voltage-mode or peak-current-mode loops at switching frequencies from tens of kilohertz to several hundred kilohertz, limited by ADC conversion time and the 40 MIPS core budget per cycle. The GS-family SMPS PWM peripherals support complementary outputs with dead-time control for synchronous rectification, and the 9KB FLASH accommodates multiple operating modes (burst, CCM, DCM) in one image. Digital control enables non-linear gain scheduling - aggressive gains near regulation, damped gains during transients - which analog error amplifiers cannot replicate. The strict 3.0V to 3.6V supply requires a small regulated bias rail, typically derived from the converter's own output or an auxiliary winding with an LDO. Keep the current-sense route short and kelvin-connected to preserve loop accuracy.
Recommended
Uninterruptible Power Supplies (UPS)
In UPS systems, the DSPIC33FJ09GS302T-E/MX supervises battery charging, inverter gating, and transfer logic simultaneously, exploiting the GS family's multi-loop SMPS peripheral support. The 9KB FLASH stores the charge-control law (constant current then constant voltage), inverter sinusoidal modulation tables, and grid-monitoring state machines, while the 1KB RAM buffers line-frequency sampling history. The -40C to +125C rating supports unconditioned telecom-cabinet and industrial installations where battery compartments reach extremes. Firmware-based control allows transfer timing and inverter synchronization to be tuned in production without hardware changes, and protection thresholds (overcurrent, overtemperature, deep-discharge) are enforced in software with hardware comparator backstop. Verify worst-case loop execution time against the 40 MIPS budget during code reviews, since UPS firmware often runs nested control loops at different rates.
Recommended
Industrial Battery Chargers
Smart industrial chargers benefit from the DSPIC33FJ09GS302T-E/MX's ability to run charge-profile state machines (CC/CV, taper, termination) alongside the switching-converter control loop in one 9KB FLASH image. The DSC samples battery voltage and current through its ADC, adjusts PWM duty via the SMPS peripherals, and can log telemetry over a serial link for fleet monitoring. Compared with analog charge controllers, firmware charging profiles support lithium, lead-acid, and NiMH chemistries on the same hardware - a key service advantage. The 3V to 3.6V core supply is isolated from battery potentials through the converter's own power stage and an isolated bias supply. The -40C to +125C extended grade permits mounting the controller near heat-generating charger power stages inside sealed industrial enclosures, though engineers should estimate junction temperature from local ambient plus switching losses before finalizing placement.
Recommended
Digital Power Development and Prototyping
The DSPIC33FJ09GS302T-E/MX is an accessible entry point into digital power development: the same dsPIC33FJ GS toolchain (MPLAB X, XC16) and reference designs - such as Microchip's Interleaved PFC reference design - scale from this 28-pin, 9KB part upward through the GS family. Prototypers appreciate that the QFN-28 6x6 mm footprint appears across multiple GS30x memory grades, so a single carrier board accepts memory upgrades without respin. During bring-up, verify the 3.0V to 3.6V rail with an oscilloscope at the pin, confirm the programming interface (MCLR/PGD/PGC) routing, and start with the vendor's digital-power firmware frameworks rather than bare-metal code. Distributor stock (LCSC from $3.9297 as of 2026-09-26, plus DigiKey/Mouser inventory) and single-unit availability make small-run prototyping economical, while tape-and-reel packaging supports a clean transition to production.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33FJ09GS302T-E/MX — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33FJ09GS302-I/MM | DSPIC33FJ09GS302T-E/MM | DSPIC33FJ09GS302T-I/MX |
|---|---|---|---|---|
| Package | QFN-28-EP (6x6 mm) | QFN-28-EP (6x6 mm) - same | QFN-28-EP (6x6 mm) - same | QFN-28-EP (6x6 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory | 9KB FLASH | 9KB FLASH | 9KB FLASH | 9KB FLASH |
| Data RAM | 1KB | 1KB | 1KB | 1KB |
| Operating Temperature | -40C to +125C | -40C to +85C | -40C to +125C | -40C to +85C |
| Supply Voltage | 3 V to 3.6 V | 3 V to 3.6 V | 3 V to 3.6 V | 3 V to 3.6 V |
| Core Performance | 16-bit dsPIC33FJ, up to 40 MIPS (family) | Same die - up to 40 MIPS | Same die - up to 40 MIPS | Same die - up to 40 MIPS |
| Special Qualification | Extended temp grade, RoHS | Industrial temp grade, RoHS | AEC-Q100 noted by distributor data | Industrial temp grade, RoHS |
Key Differentiators
- Extended +125C operating range for hot environments (vs DSPIC33FJ09GS302-I/MM)
- Dedicated SMPS peripheral set in a small 28-pin footprint (vs DSPIC33FJ09GS302T-E/MM)
- Same-footprint firmware portability across GS30x memory grades (vs DSPIC33FJ09GS302T-I/MX)
Design Notes
The DSPIC33FJ09GS302T-E/MX requires a regulated 3.0V to 3.6V supply. In digital power designs the controller rail is often derived from an auxiliary winding through a small LDO - choose an LDO whose output tolerance keeps the DSC pin voltage below 3.6V at no load. Place one 0.1uF ceramic capacitor at each VDD/VSS pin pair plus one bulk capacitor (4.7uF to 10uF, estimated from typical dsPIC33FJ reference designs) near the package, and separate the digital rail from any analog reference rail with an RC or ferrite filter to keep ADC readings clean.
For the QFN-28-EP 6x6 mm package, solder the exposed pad to a grounded copper pour with an array of thermal vias - the pad is the primary ground return and heat path for the die. Route high-dv/dt switch nodes and gate-drive traces on a different layer than ADC feedback and oscillator traces, and use kelvin routing for current-sense signals. Keep the programming pins (MCLR, PGD, PGC) brought to a 5-pin header even in production boards to preserve in-circuit reprogrammability of control coefficients in the 9KB FLASH.
Two frequent errors with this part: first, substituting an 'I' grade variant (e.g., DSPIC33FJ09GS302-I/MM, max +85C) into a design validated to +125C, which silently removes thermal margin - always match the temperature grade suffix. Second, exceeding the 3.6V absolute supply limit from an unregulated bias rail during transients; add a clamp or regulator headroom check in worst-case analysis. Also budget the 9KB FLASH early - bootloader plus multi-loop control firmware can approach the limit, forcing a move to a higher-memory GS30x part late in the project.
Compliance Information
RoHS compliant per JLCPCB part listing (C622848). Distributor data (Microchip USA) describes the related -E/MM order code as AEC-Q100 qualified; qualification status for this exact /MX order code not stated in verified data - confirm with Microchip for automotive use. REACH, halogen-free, and conflict-minerals statuses not stated in provided data.
