dsPIC33EP32GS505T-I/PT - 16-bit 70MIPS DSC 32KB Flash | Microchip
MPN: DSPIC33EP32GS505T-I/PT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.75 | $4.75 |
| 10 | $4.35 | $43.50 |
| 100 | $3.95 | $395.00 |
| 500 | $3.6 | $1,800.00 |
| 1,000 | $3.3 | $3,300.00 |
DSPIC33EP32GS505T-I/PT Overview
A digital signal controller is a hybrid device class that merges the computational throughput of a digital signal processor with the peripheral integration, interrupt architecture and ease of use of a microcontroller. Within the power management hierarchy, the DSC sits at the top: general-purpose MCU first, DSP-enhanced MCU second, and purpose-built digital power DSC third. The dsPIC33EP GS (SMPS) family is Microchip's third tier, purpose-built for switch-mode power conversion.
Key features include a modified Harvard 16-bit DSP core with single-cycle MAC and 40-bit accumulator, high-resolution PWM peripherals suited to power topologies, 12-bit ADC hardware tailored for current-mode control loops, and industrial temperature rating of -40C to +85C for the /I grade. The tape-and-reel /PT suffix indicates automatic-assembly packaging for volume production.
Architecturally, the GS505 integrates dedicated digital power peripherals that offload time-critical PWM and ADC triggering from software, allowing control-loop latencies and duty-cycle update resolution to meet the demands of peak-current-mode and voltage-mode SMPS designs.
Typical applications include digital power supplies, interleaved power factor correction (the Microchip 350 W universal-input interleaved PFC reference design is based on this family), DC-DC converters, battery chargers, and digital lighting ballasts.
When designing with this device, budget the 3.0 V to 3.6 V supply rail carefully and verify that PWM dead-time insertion and ADC sampling timing are configured per the dsPIC33EP GS family reference manual for the chosen control topology.
This page synthesizes distributor pricing context, drop-in alternatives within the same 48-pin TQFP footprint, and practical design notes not consolidated in the manufacturer datasheet.
Drop-in alternatives for DSPIC33EP32GS505T-I/PT — 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 DSPIC33EP32GS505T-I/PT (same form factor and footprint) — differing in Package, Core Architecture, Analog Peripherals, Functional Safety Support, Operating Temperature.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33EP32GS505T-E/PT
✅ Drop-In✓ In Stock
$3.6 / Unit
View Datasheet →DSPIC33EP32GP504T-I/PT
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$2.15 / Unit
View Datasheet →DSPIC33EP16GS504-I/PT
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
Contact for price
View Datasheet →DSPIC33EP32GS505T-I/PT Maximum Ratings & Electrical Characteristics
| Core Architecture | 16-bit dsPIC33EP RISC, DSP-enhanced |
| Program Memory (Flash) | 32 KB |
| Maximum Throughput | 70 MIPS |
| Supply Voltage Range | 3.0 V to 3.6 V |
| Package | 48-TQFP-EP (7x7 mm) |
| Operating Temperature Range | -40C to +85C (/I industrial grade) |
| Product Class | Digital Signal Controller (DSC) / Digital Signal Processor (DSP) |
| Product Family | dsPIC33EP GS (SMPS) digital power family |
| Mounting Type | Surface Mount |
| Packaging Suffix | T/PT = Tape & Reel, TQFP |
| Target Applications | Digital power supplies, PFC, motor control |
| Reference Design | Microchip Interleaved PFC reference design, up to 350 W universal input |
| RoHS Status | Lead free / RoHS compliant (per distributor data) |
| Parametric Data Last Updated | 18-JUL-2024 (datasheets.com) |
DSPIC33EP32GS505T-I/PT 48-tqfp-ep (7x7 mm) Pin Configuration Guide
Pin configuration for DSPIC33EP32GS505T-I/PT (48-tqfp-ep (7x7 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 DSPIC33EP32GS505T-I/PT.
Refer to the datasheet for full pin configuration.
Typical Applications
DSPIC33EP32GS505T-I/PT is suitable for 6 applications: Interleaved Power Factor Correction, Digital SMPS / DC-DC Converters, Battery Chargers, Digital Lighting Ballasts and LED Drivers, Motor Control, General Embedded Control and Sensing.
Interleaved Power Factor Correction
The dsPIC33EP32GS505T-I/PT is the controller behind Microchip's 350 W interleaved PFC reference design, which accepts universal AC input and produces a single high-voltage DC output. The GS family's high-resolution PWM channels drive two interleaved boost phases with precise phase offset, while the power-specific ADC samples inductor currents synchronized to the PWM edges, enabling average-current-mode control with fast loop response. Its 70 MIPS DSP core executes the control mathematics with headroom for power-quality monitoring and housekeeping tasks. Implementing PFC digitally eliminates tolerance-sensitive analog compensation networks and allows firmware-adjustable bus voltage targets, surge handling, and adaptive phase shedding at light load for efficiency gains.
Recommended
Digital SMPS / DC-DC Converters
In digitally controlled switch-mode power supplies, the dsPIC33EP32GS505T-I/PT replaces analog PWM controllers by generating duty cycles in firmware and hardware. The GS (SMPS) peripheral set supports peak-current-mode and voltage-mode topologies with high duty-cycle resolution, and ADC triggers synchronized to PWM events capture current and voltage feedback at the optimal instant in each switching period. This eliminates comparator offset and ramp compensation drift associated with analog solutions. Typical use includes telecom and industrial intermediate-bus converters where firmware enables programmable output voltages, soft-start profiles, and fault logging that analog controllers cannot provide without external circuitry.
Recommended
Battery Chargers
Smart battery chargers benefit from the dsPIC33EP32GS505T-I/PT because charge algorithms (CC/CV, multi-stage, temperature-derated) are naturally expressed in firmware. The ADC monitors pack voltage, current, and NTC thermistor readings each switching cycle, while the PWM output regulates the charging power stage through the CC and CV phases with smooth transitions. The 70 MIPS core leaves margin for coulomb counting, safety state machines, and communication. Digital control also enables charge-profile updates for new chemistries without hardware changes, and the 3.0 V to 3.6 V rail simplifies powering from a small auxiliary supply in compact charger designs.
Recommended
Digital Lighting Ballasts and LED Drivers
Digitally controlled LED drivers and lighting ballasts use the dsPIC33EP32GS505T-I/PT to regulate output current while implementing dimming, PFC front ends, and lamp protection in one controller. The high-resolution PWM supports both the power-conversion switching stage and dimming control, and the ADC's cycle-synchronized sampling keeps current regulation tight across line and load variations. Firmware-based control adds capabilities such as gradual warm-up, thermal foldback, and fault shutdown with logged diagnostics. The 48-TQFP-EP package provides enough I/O to manage multiple LED strings plus housekeeping peripherals within a single 7x7 mm footprint.
Recommended
Motor Control
The dsPIC33EP32GS505T-I/PT supports motor control applications including BLDC, PMSM, and ACIM drives. Its DSP engine executes field-oriented control mathematics with single-cycle MAC operations, the PWM peripherals generate the complementary three-phase drive signals with hardware dead-time insertion, and ADC triggering synchronized to the PWM centers produces clean phase-current samples free of switching noise. Distributor listings (Microchip USA) explicitly cite motor control among this device's employment areas. The 70 MIPS throughput and 32 KB of Flash accommodate sensorless observers, startup routines, and protection state machines alongside the core control loop in a single device.
Recommended
General Embedded Control and Sensing
Beyond power conversion, the dsPIC33EP32GS505T-I/PT serves as a high-performance embedded controller where DSP capability adds value: audio signal conditioning, sensor fusion, digital filtering of noisy measurements, and precision instrumentation. The 70 MIPS core with hardware MAC accelerates FIR/IIR filtering that would burden a conventional 8-bit or low-end 16-bit MCU, while the 32 KB Flash and rich peripheral multiplexing on the 48-pin TQFP support UART, SPI, and I2C connectivity. For general control-only designs lacking DSP workloads, the GP-family DSPIC33EP32GP504T-I/PT on the same footprint may offer a more economical fit.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33EP32GS505T-I/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33EP32GS505T-E/PT | DSPIC33EP32GP504T-I/PT | DSPIC33EP16GS504-I/PT |
|---|---|---|---|---|
| Package | 48-TQFP-EP (7x7 mm) | 48-TQFP-EP (7x7 mm) - same | 48-TQFP - same footprint | 48-TQFP - same footprint |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 32 KB | 32 KB | 32 KB | 16 KB |
| Core Throughput | 70 MIPS | 70 MIPS | 70 MIPS | 70 MIPS |
| Peripheral Family | GS (SMPS digital power) | GS (SMPS digital power) - same | GP (general purpose) | GS (SMPS digital power) - same |
| Temperature Range | -40C to +85C (industrial) | Extended grade (/E) | -40C to +85C (industrial) | -40C to +85C (industrial) |
| Supply Voltage | 3.0 V to 3.6 V | 3.0 V to 3.6 V | 3.0 V to 3.6 V | 3.0 V to 3.6 V |
| Digital Power Peripherals (HR PWM) | Yes (GS family) | Yes | No (standard PWM) | Yes |
Key Differentiators
- Purpose-built SMPS digital power peripherals (vs DSPIC33EP32GP504T-I/PT)
- Extended temperature upgrade without redesign (vs DSPIC33EP32GS505T-E/PT)
- Memory headroom in the GS family (vs DSPIC33EP16GS504-I/PT)
Design Notes
Supply the controller from a clean 3.3 V rail within the 3.0 V to 3.6 V range. Place 0.1 uF ceramic decoupling capacitors at each VDD/VSS pin pair, plus one bulk capacitor (4.7 uF to 10 uF) near the package. In digital power designs the controller often shares a board with a switching stage - isolate the MCU supply from the power-stage bias with an RC filter or a dedicated small LDO to prevent switching-frequency ripple from appearing on ADC references and resetting the DSC during load transients.
Solder the exposed pad of the 48-TQFP-EP (7x7 mm) to an array of thermal vias connected to the ground plane. Beyond thermal dissipation, the exposed pad provides the primary low-inductance ground return for the high-speed digital core, which matters when ADC and PWM peripherals operate in the same switching cycle. Keep analog feedback traces (current-sense shunt to ADC pins) short, differential where possible, and route them away from PWM output traces and switching nodes to preserve control-loop measurement accuracy.
When migrating between GS and GP family parts on the same 48-pin footprint (for example to DSPIC33EP32GP504T-I/PT), do not assume register-level peripheral compatibility: the GS family's high-resolution PWM and power-specific ADC modules have no GP counterpart, and firmware will fail to control the power stage. Also confirm the temperature suffix during procurement - the /E grade (DSPIC33EP32GS505T-E/PT) and /I grade are electrically identical but differ in maximum ambient rating; substituting /I for /E designs is a reliability error.
Compliance Information
Distributor listings (components-store.com, DigiKey) state Lead free / RoHS compliant. REACH, halogen-free and conflict-minerals status not stated in provided data - request formal compliance documentation from Microchip.
