DSPIC33CK32MP105T-I/M4 - 100MHz 16-bit DSC 32KB Flash | Microchip
MPN: DSPIC33CK32MP105T-I/M4 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.62 | $3.62 |
| 10 | $3.26 | $32.60 |
| 100 | $2.9 | $290.00 |
| 500 | $2.61 | $1,305.00 |
| 1,000 | $2.35 | $2,350.00 |
DSPIC33CK32MP105T-I/M4 Overview
A digital signal controller combines the computational architecture of a microcontroller with the DSP capability of a digital signal processor. In the power-management hierarchy, the dsPIC33CK sits in the digital signal controller (DSC) class, above general-purpose MCUs for control-loop math, and below standalone DSPs, targeting real-time closed-loop control in power electronics and motor drives.
Key features include the 100 MHz single-core dsPIC33CK CPU with DSP instructions, 32KB FLASH and 8KB RAM, on-chip operational amplifiers that reduce external BOM count in current-sense paths, 12-bit ADCs supporting simultaneous sampling for three-phase systems, and PWM peripherals engineered for digital power conversion. The device operates from a 3V to 3.6V supply with 39 general-purpose I/O and an industrial temperature range of -40C to +85C.
Technically, the dsPIC33CK core executes most instructions in a single cycle, enabling fast control loops such as peak current-mode control in switching converters. The Functional Safety (FuSa) variant designation supports safety-oriented designs, and the M4 suffix denotes the 48-UQFN 6x6 mm package in Tape & Reel packaging.
Typical applications include digital power supplies (LLC, PFC, buck/boost), BLDC and PMSM motor control, and advanced sensing and control systems where fast ADC-to-PWM latency is critical.
A key design consideration: the 3V to 3.6V supply range requires a tight 3.3V rail; decouple with low-ESR ceramics close to each VDD pin per the manufacturer datasheet.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for DSPIC33CK32MP105T-I/M4 — 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 DSPIC33CK32MP105T-I/M4 (same form factor and footprint) — differing in Core, Operating Temperature, Packaging, PWM, Package.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33CK32MP105T-E/M4
✅ Drop-In📋 Reference alternative (not in catalog)
DSPIC33CK64MP105-I/M4
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$3.68 / Unit
View Datasheet →DSPIC33CK32MC105-E/M4
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$3.2 / Unit
View Datasheet →DSPIC33CK32MP105T-I/M4 Maximum Ratings & Electrical Characteristics
| Core | dsPIC33CK 16-bit DSC, single core |
| CPU Speed | 100 MHz |
| FLASH Program Memory | 32KB (32K x 8) |
| RAM | 8KB (8K x 8) |
| Supply Voltage | 3 V to 3.6 V |
| I/O Count | 39 |
| ADC Resolution | 12-bit |
| Integrated Op Amps | Yes |
| PWM | High-resolution PWM |
| Operating Temperature | -40C to +85C |
| Package | 48-UQFN (6x6 mm) |
| Mounting Type | Surface Mount |
| Packaging | Tape & Reel (T) |
| Feature Set | Functional Safety (FuSa) |
| Max Supply Current | 300 mA |
| RoHS Status | Compliant |
DSPIC33CK32MP105T-I/M4 48-uqfn (6x6 mm) Pin Configuration Guide
Pin configuration for DSPIC33CK32MP105T-I/M4 (48-uqfn (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 DSPIC33CK32MP105T-I/M4.
Refer to the datasheet for full pin configuration.
Typical Applications
DSPIC33CK32MP105T-I/M4 is suitable for 6 applications: Digital Power Supplies, BLDC and PMSM Motor Control, Power Factor Correction (PFC) Stages, Solar Micro-Inverters and MPPT, Advanced Sensing and Industrial Control, Onboard Chargers and DC-DC Converters for E-Mobility.
Digital Power Supplies
The DSPIC33CK32MP105T-I/M4 fits digital power conversion because its 100 MHz single-cycle DSP core closes current loops fast enough for LLC, PFC, and buck/boost topologies running at hundreds of kHz. The 12-bit ADC samples input and output rails with low latency, and the high-resolution PWM gives fine duty-cycle granularity that reduces output ripple and improves transient response versus standard PWM peripherals. In a typical setup, the ADC trigger is synchronized to the PWM period so voltage and current sampling occurs at the lowest-noise instant of the switching cycle, and the control compensator output directly updates the PWM duty cycle within one loop iteration. Compared with analog control, firmware-based control allows nonlinear gains, mode switching between CC/CV, and adaptive dead-time. The trade-off is software complexity and the need to validate worst-case loop latency, but the integrated op amps further cut BOM by conditioning current-shunt signals on-chip.
Recommended
BLDC and PMSM Motor Control
Field-oriented control of BLDC and PMSM motors is a primary use case for the DSPIC33CK32MP105T-I/M4. The 100 MHz core executes the Clarke/Park transforms and PI current loops in single-cycle MAC operations, keeping total control-loop latency in the low microseconds required for smooth low-speed torque. The 12-bit ADC supports simultaneous sampling of two phase currents, which is essential for accurate FOC, and the integrated operational amplifiers amplify shunt-resistor signals without external op amps, saving board area and cost in compact drives. The high-resolution PWM peripheral generates center-aligned six-channel drive with adjustable dead time, and fault inputs support fast hardware shutdown on overcurrent events. Typical implementations run the current loop at 20-50 kHz and the speed loop at 1-5 kHz. Firmware scalability within the dsPIC33CK family allows a single code base to span 32KB to 256KB FLASH variants as motor power levels grow.
Recommended
Power Factor Correction (PFC) Stages
In AC-DC systems, the DSPIC33CK32MP105T-I/M4 implements boost-PFC control with its fast ADC-to-PWM path: input voltage and inductor current are sampled each switching cycle, and the 100 MHz core updates the PWM duty with average current-mode or borderline control algorithms. The high-resolution PWM improves duty resolution at high switching frequencies, directly reducing input current distortion and improving power factor above 0.99 in well-tuned designs. The 32KB FLASH accommodates the PFC compensator plus housekeeping tasks such as inrush control, brownout handling, and host communication. Firmware control also allows frequency folding at light load to maintain efficiency across the load range, something fixed analog controllers cannot do without extra circuitry. Because the DSC operates from a tight 3V to 3.6V rail, it is typically powered from an auxiliary flyback output with local ceramic decoupling near each VDD pin.
Recommended
Solar Micro-Inverters and MPPT
The DSPIC33CK32MP105T-I/M4 serves in solar micro-inverter and MPPT stages where its DSP throughput executes maximum-power-point algorithms alongside grid-current control loops. The 12-bit ADC digitizes panel voltage/current and grid feedback with sufficient resolution for precise MPPT tracking, while the high-resolution PWM drives the power stage with low ripple. Integrated op amps condition current-sense shunts directly, which matters in thermally constrained outdoor enclosures where board area is costly. Firmware-defined control permits per-panel energy harvest optimization, anti-islanding protection logic, and adaptive switching frequency - features hard-wired analog solutions cannot match. The -40C to +85C industrial grade covers rooftop temperature extremes, and the compact 48-UQFN 6x6 mm footprint suits densely integrated micro-inverter PCBs. Designers should budget junction temperature carefully since the DSC runs continuous high-frequency loops at up to 300 mA supply current under load.
Recommended
Advanced Sensing and Industrial Control
Beyond power electronics, the DSPIC33CK32MP105T-I/M4 fits advanced sensing nodes and industrial control units that need DSP-class math at MCU-class power. Single-cycle MAC operations accelerate digital filtering (FIR/IIR), FFT-based vibration analysis, and sensor-fusion arithmetic on data streamed from the 12-bit ADC. The 39 I/O lines interface with rotary encoders, limit switches, and industrial transceivers, while the 3V to 3.6V operation matches common 3.3V sensor rails directly. The Functional Safety (FuSa) designation provides access to Microchip safety documentation that supports safety-relevant industrial designs. At 32KB FLASH and 8KB RAM, the part targets focused applications - a single control loop plus communication - rather than large protocol stacks; designs needing larger firmware images should move to 64KB or 128KB family members on compatible toolchains. The 48-UQFN package suits compact DIN-rail and embedded sensing modules.
Recommended
Onboard Chargers and DC-DC Converters for E-Mobility
Low-power onboard charger auxiliary stages and 48V-to-12V DC-DC converters use the DSPIC33CK32MP105T-I/M4 to run phase-shift full-bridge or LLC control loops with firmware flexibility. The 100 MHz core sustains the voltage and current loops for these topologies, while the 12-bit ADC's simultaneous sampling supports transformer current and output voltage capture synchronized to PWM edges. High-resolution PWM with programmable dead time and phase shift is exactly the modulator this class of converter needs, and hardware fault inputs trip the outputs in nanoseconds on overcurrent, protecting power stages during transients. For automotive-adjacent programs, the extended-temperature -E variant in the same package provides a thermal-grade upgrade path without PCB respin. Designers should verify that the industrial -I grade meets their enclosure thermal budget, and should place the 3.3V decoupling network tightly around the QFN given switching-node noise proximity in converter layouts.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33CK32MP105T-I/M4 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33CK32MP105T-E/M4 | DSPIC33CK64MP105-I/M4 | DSPIC33CK32MC105-E/M4 |
|---|---|---|---|---|
| Package | 48-UQFN (6x6 mm) | 48-UQFN (6x6 mm) - same | 48-UQFN (6x6 mm) - same | 48-UQFN (6x6 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| CPU Speed | 100 MHz | 100 MHz | 100 MHz | 100 MHz |
| FLASH Memory | 32KB | 32KB | 64KB | 32KB |
| Operating Temperature | -40C to +85C | -40C to +125C | -40C to +85C | -40C to +125C |
| 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 |
| Packaging | Tape & Reel (T) | Tape & Reel | Tray (non-T suffix) | Tray (non-T suffix) |
Key Differentiators
- Cost-optimized 32KB FLASH entry point (vs DSPIC33CK64MP105-I/M4)
- Industrial temperature grade for cost-sensitive builds (vs DSPIC33CK32MP105T-E/M4)
- Integrated op amps and 12-bit ADC (vs DSPIC33CK32MC105-E/M4)
Design Notes
The DSPIC33CK32MP105T-I/M4 requires a tightly regulated 3V to 3.6V rail; design around 3.3V nominal. Estimated: worst-case supply current around 300 mA means a 3.3V rail delivers roughly 1 W to the DSC at full activity, so size the LDO or buck for at least 500 mA headroom. Place one 0.1 uF ceramic capacitor at each VDD/VSS pin pair plus bulk 10 uF ceramic near the package. In digital power layouts, keep the controller ground reference away from power-stage return paths to prevent switching noise corrupting ADC readings.
The 48-UQFN 6x6 mm (M4) package has a perimeter lead array with exposed thermal pad; connect the exposed pad to a solid ground plane with an array of vias for heat spreading and ground integrity. Keep the high-frequency crystal or internal FRC clock traces short. Route ADC inputs away from PWM switching nodes, and use Kelvin connections at current shunts feeding the integrated op amps to preserve 12-bit accuracy. Follow Microchip's dsPIC33CK layout guidance in the family datasheet and its digital power reference designs.
Do not confuse package suffixes: M4 is 48-UQFN while PT is 48-TQFP - the footprints differ and are not interchangeable without a PCB respin. Also, the T in the MPN means Tape & Reel only (packaging), not a temperature grade; the -I suffix defines the -40C to +85C industrial range. Finally, verify that your 32KB FLASH is sufficient before committing: FOC firmware with communication stacks can approach this limit, and the drop-in 64KB dsPIC33CK64MP105 avoids a respin if you later need more code space.
Compliance Information
RoHS compliant per distributor listing data (PCBElectronics, DigiKey). The -E variant is noted as AEC-Q100-related qualified per Microchip USA; the -I variant's automotive qualification status is not stated in provided data.
