DSPIC33CK32MP105-I/M4 - 16-bit 100MHz DSC 32KB Flash | Microchip
MPN: DSPIC33CK32MP105-I/M4 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.52 | $4.52 |
| 10 | $4.07 | $40.70 |
| 100 | $3.62 | $362.00 |
| 500 | $3.26 | $1,630.00 |
| 1,000 | $2.94 | $2,940.00 |
DSPIC33CK32MP105-I/M4 Overview
A digital signal controller combines the computational throughput of a digital signal processor with the integrated peripherals and deterministic control of a microcontroller. Within the power-management hierarchy of embedded systems, the DSC sits between a general-purpose MCU and a dedicated DSP, making it the standard choice for closed-loop control loops such as digital power conversion, motor control, and advanced sensing, where fast interrupt latency and cycle-accurate PWM matter more than raw floating-point throughput.
Key features include the 100 MHz dsPIC33CK single-core pipeline with DSP engine (barrel shifter, hardware divide, MAC instructions), 12-bit high-speed ADCs capable of up to 3.5 Msps operation, integrated operational amplifiers, high-speed comparators, and dedicated high-resolution PWM modules purpose-built for switch-mode power supplies and motor drives. The device also carries functional safety (FuSa) support packages, simplifying IEC 61508-oriented development.
Architecturally, the dsPIC33CK core executes from a single flash array with prefetch, delivering many DSP algorithms in 1-2 cycles per instruction. The integrated op amps and comparators offload analog signal conditioning that would otherwise require external components, reducing BOM count and board area in compact 48-UQFN designs.
Typical applications include digitally controlled AC/DC and DC/DC power supplies, PFC stages, brushless DC and PMSM motor drives, and power-factor-corrected LED drivers. The combination of fast ADCs and 1 ns-resolution PWM aligns directly with these loops.
Design consideration: at 100 MHz core frequency, ensure a stable 3.0-3.6 V supply with local 0.1 uF decoupling on every VDD/VSS pair, and plan programming/debug access (PGEC/PGDT pins, ICSP) in layout.
This page synthesizes verified distributor data, same-family drop-in alternatives, and design guidance not found in the manufacturer datasheet.
Drop-in alternatives for DSPIC33CK32MP105-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 DSPIC33CK32MP105-I/M4 (same form factor and footprint) — differing in Core, Package, ADC Resolution, Operating Temperature, Supply Voltage.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33CK32MC105-I/M4
✅ Drop-In✓ In Stock
$2.19 / Unit
View Datasheet →DSPIC33CK32MC105-E/M4
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$3.2 / Unit
View Datasheet →DSPIC33CK32MP105-E/M4
✅ Drop-In✓ In Stock
Contact for price
View Datasheet →DSPIC33CK64MP105-I/M4
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$3.68 / Unit
View Datasheet →DSPIC33CK128MP105-I/M4
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33CK32MP105-I/M4 Maximum Ratings & Electrical Characteristics
| Core | dsPIC33CK 16-bit DSC, single core |
| Maximum Clock Frequency | 100 MHz |
| Program Memory Size | 32 KB (32K x 8) Flash |
| RAM Size | 8 KB |
| ADC Resolution | 12 bit |
| Package | 48-UQFN (6x6 mm), suffix M4 |
| Operating Temperature Range | -40C to +85C (I-grade) |
| Supply Voltage | 3.0 V to 3.6 V |
| Mounting Type | Surface Mount |
| Interface Type | UART, SPI, I2C, CAN-FD, QEI |
| Peripherals | High-speed 12-bit ADC, Op Amps, Comparators, High-Resolution PWM |
| Functional Safety Support | FuSa package supported |
| Programmability | In-Circuit Serial Programming (ICSP), 2-wire debug |
| Product Family | dsPIC33CK MP (digital power and motor control) |
| RoHS Status | Compliant |
DSPIC33CK32MP105-I/M4 48-uqfn (6x6 mm), suffix m4 Pin Configuration Guide
Pin configuration for DSPIC33CK32MP105-I/M4 (48-uqfn (6x6 mm), suffix m4 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 DSPIC33CK32MP105-I/M4.
Refer to the datasheet for full pin configuration.
Typical Applications
DSPIC33CK32MP105-I/M4 is suitable for 6 applications: Digitally Controlled AC/DC Power Supplies, Brushless DC and PMSM Motor Drives, Power Factor Correction (PFC) Stages, DC/DC Converters and Point-of-Load Regulation, Industrial Sensing and Control Nodes, LED Drivers and Lighting Power.
Digitally Controlled AC/DC Power Supplies
The DSPIC33CK32MP105-I/M4 is purpose-built for digitally controlled AC/DC converters, where the 100 MHz dsPIC33CK core, 12-bit high-speed ADC and high-resolution PWM create a fast, deterministic feedback loop. In a flyback or LLC converter, the ADC samples the output voltage or current each switching cycle and the core updates the PWM duty cycle within the same period, achieving transient response that analog-only loops struggle to match. The integrated op amps condition current-shunt signals without external amplifier ICs, cutting BOM cost and board area in the compact 48-UQFN footprint. Designers should budget CPU load for the control ISR, compensator math and protection tasks, keeping peak-cycle execution within the 10 us budget of a 100 kHz converter; the DSP engine's single-cycle MAC instructions make this practical at 100 MHz.
Recommended
Brushless DC and PMSM Motor Drives
Field-oriented control (FOC) of BLDC and PMSM motors demands fast current-loop sampling, sinusoidal PWM generation and math-intensive Clarke/Park transforms - all native strengths of the DSPIC33CK32MP105-I/M4. The 100 MHz core executes FOC inner loops at 10-20 kHz with single-cycle MAC and hardware divide support, while the 12-bit ADC samples two or three phase currents simultaneously. Dedicated PWM modules produce complementary outputs with programmable dead-time for the three-phase inverter bridge. The integrated op amps and comparators enable overcurrent protection in hardware, reacting faster than any firmware loop. With 32 KB flash, a complete single-shunt or three-shunt FOC stack with communication fits comfortably; if additional features such as CAN-FD messaging layers grow the code base, the pin-compatible DSPIC33CK64MP105 or 128MP105 upgrades without PCB rework.
Recommended
Power Factor Correction (PFC) Stages
Continuous-conduction-mode boost PFC and totem-pole PFC topologies benefit directly from the DSPIC33CK32MP105-I/M4's fast ADC and high-resolution PWM. The controller samples input voltage, inductor current and bus voltage every switching cycle; the 100 MHz core computes the average-current-mode compensator and updates duty within microseconds. High-resolution PWM edge placement reduces jitter, improving THD at light load, while cycle-by-cycle current limiting via the integrated comparators provides hardware-level protection against inrush and transformer saturation. For totem-pole PFC, the core can sequence fast and slow leg PWM signals with precise dead-time. The 48-UQFN 6x6 mm package allows the controller to sit close to gate drivers on dense power boards, and the industrial -40C to +85C rating covers typical PSU ambient conditions.
Recommended
DC/DC Converters and Point-of-Load Regulation
In digital point-of-load and intermediate-bus DC/DC converters, the DSPIC33CK32MP105-I/M4 implements voltage-mode, current-mode or digital hysteretic control with configurable loop bandwidth. The high-speed 12-bit ADC plus high-resolution PWM closes the loop with latency low enough for 200 kHz-1 MHz switching frequencies typical of POL designs. Integrated comparators provide fast hiccup-mode overcurrent protection, and the core implements PMBus/I2C telemetry for remote monitoring. Because the whole control loop, compensation and housekeeping fit in 32 KB flash, the part suits compact single-rail and small multi-rail applications. Designers should reserve CPU headroom for fault handling and startup sequencing, and place the ADC inputs adjacent to the sense network to minimize noise pickup in the 6x6 mm QFN layout.
Recommended
Industrial Sensing and Control Nodes
Beyond power conversion, the DSPIC33CK32MP105-I/M4 serves as an advanced sensing and control node: the on-chip op amps amplify sensor signals (pressure, current, temperature), the 12-bit ADC digitizes them, and DSP instructions implement digital filtering (IIR/FIR) on-chip. CAN-FD connectivity links the node to industrial fieldbuses, while UART/SPI/I2C handle local peripherals and HMI. Deterministic 100 MHz execution enables real-time tasks such as encoder decoding via QEI, closed-loop actuator control and condition-monitoring analytics in the same device. Functional safety (FuSa) support eases deployment in safety-relevant industrial equipment. The industrial temperature rating and RoHS-compliant 48-UQFN package suit DIN-rail modules, sensor heads and compact PLC expansion cards where board space and long-term availability both matter.
Recommended
LED Drivers and Lighting Power
Digital LED drivers - especially dimmable, power-factor-corrected and multi-channel architectures - use the DSPIC33CK32MP105-I/M4 to regulate LED current with high-resolution PWM and ADC feedback. The controller implements constant-current loops per channel, adaptive dimming (PWM and analog dimming), and thermal derating curves based on NTC feedback sampled through the 12-bit ADC. The integrated comparators provide cycle-by-cycle overcurrent shutdown for shorted-string protection, and the DSP core handles flicker-free dimming algorithms that keep sub-1% duty edges stable thanks to high-resolution PWM. With 32 KB flash, a complete driver with DMX/UART or DALI-over-UART communication fits on-chip. The 48-UQFN footprint lets the controller mount directly on the LED driver power board, reducing EMI loop area between control and gate-drive circuitry.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33CK32MP105-I/M4 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33CK32MC105-I/M4 | DSPIC33CK32MP105-E/M4 | DSPIC33CK64MP105-I/M4 |
|---|---|---|---|---|
| Package | 48-UQFN (6x6 mm, M4) | 48-UQFN (6x6 mm) - same | 48-UQFN (6x6 mm) - same | 48-UQFN (6x6 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core Clock | 100 MHz | 100 MHz | 100 MHz | 100 MHz |
| Flash Memory | 32 KB | 32 KB | 32 KB | 64 KB |
| RAM | 8 KB | 8 KB | 8 KB | 8 KB |
| Temperature Range | -40C to +85C | -40C to +85C | -40C to +125C | -40C to +85C |
| Peripheral Emphasis | Digital power (MP): HS ADC, op amps, HR PWM | Motor control (MC) peripheral set | Digital power (MP) - identical | Digital power (MP) - identical |
Key Differentiators
- Digital-power-optimized MP peripheral set (vs DSPIC33CK32MC105-I/M4)
- Pin-compatible flash upgrades (vs DSPIC33CK64MP105-I/M4)
- Extended temperature option without redesign (vs DSPIC33CK32MP105-E/M4)
Design Notes
Power the DSPIC33CK32MP105-I/M4 from a clean 3.0-3.6 V rail. Tie every VDD pin to the same supply and place a 0.1 uF ceramic capacitor at each VDD/VSS pair, routed with short, direct traces, plus 4.7-10 uF bulk capacitance near the device. In digital power applications, separate the controller supply from noisy gate-driver rails with an LC filter or dedicated LDO; ADC reference quality directly sets feedback-loop accuracy, so treat VREF/AVDD routing with the same care as the analog signal path.
The 48-UQFN (6x6 mm) M4 package has an exposed thermal pad that must be soldered to a grounded copper pour for both thermal and electrical performance; follow Microchip's recommended QFN land pattern with via stitching under the pad. Keep the 100 MHz clock and high-speed PWM traces short, and reserve programming access to MCLR, PGEC1/PGED1 and VDD/VSS on a 5- or 6-pin header for ICSP with PICkit 4 or ICD 4. Place analog sense routing away from PWM and gate-driver traces to preserve ADC accuracy.
Do not confuse package suffixes: -I/M4 (48-UQFN) and -I/PT (48-TQFP 7x7 mm) are the same die but different footprints and are NOT solderable on the same PCB. Also, the -E suffix denotes extended temperature (-40C to +125C) - specify it explicitly for high-ambient designs. At qty-1 pricing around $4.52 (as of 2026-09-23), it is often cheaper to buy the larger-flash DSPIC33CK64MP105 than to redesign when 32 KB fills up; verify flash headroom before freezing the BOM.
Compliance Information
RoHS compliant and lead-free per Microchip product page and DigiKey listing. REACH, halogen-free and conflict-minerals declarations should be obtained from Microchip's official compliance documentation.
