DSPIC33CK128MP203T-I/M5 - 100MHz 128KB DSC UQFN-36 | Microchip
MPN: DSPIC33CK128MP203T-I/M5 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $5.2 | $5.20 |
| 10 | $4.68 | $46.80 |
| 100 | $4.16 | $416.00 |
| 500 | $3.72 | $1,860.00 |
| 1,000 | $3.3 | $3,300.00 |
DSPIC33CK128MP203T-I/M5 Overview
A digital signal controller combines the compute throughput of a DSP with the peripheral integration and deterministic interrupt architecture of a microcontroller. Within the power-management hierarchy, the dsPIC33CK family sits above basic MCUs in digital control loops, offering single-cycle MAC instructions, high-resolution PWM, and fast 12-bit ADCs that allow a single chip to close current, voltage, and speed loops in switch-mode power supplies and motor drives. The family is a direct evolution of the dsPIC33C generation, adding a dual-issue pipeline and CAN Flexible Data (CAN FD) support.
Key features of this device include the 100 MHz dsPIC core with DSP engine, three integrated operational amplifiers, three analog comparators, high-resolution PWM peripherals suited for power conversion, and PTG (Programmable Toggle Generator) hardware. The -I temperature suffix denotes industrial operation from -40C to +85C, and the T suffix indicates tape-and-reel packaging. The device operates from a 3.0V to 3.6V supply and supports In-Circuit Serial Programming (ICSP) via PGC/PGD pins.
Technically, the dsPIC33CK128MP203 integrates multiple internal bus architectures and DMA channels that offload data movement from the CPU, which is essential for high-frequency control loops where interrupt latency directly affects loop bandwidth. According to Microchip product documentation, the family targets digital power, motor control, advanced sensing, and high-performance embedded control applications, with Functional Safety (FuSa) support documentation available for safety-oriented designs.
Typical applications include digital power supplies (LLC, totem-pole PFC, buck/boost converters), BLDC and PMSM motor control with sensorless field-oriented control, and digital lighting or battery-charging systems. The three on-chip op-amps can be used as current-sense amplifiers, reducing external component count in motor-drive and power-converter designs.
For design, note that the UQFN exposed-pad package requires a solid ground pour beneath the device for thermal dissipation and signal integrity; decouple the 3.3V rail with 0.1uF ceramics at each VDD pin. Programmers must supply a stable 3.3V VDD during ICSP.
This page synthesizes distributor availability, same-family drop-in alternatives, and practical design guidance not found in the manufacturer datasheet, with pricing quoted as of 2026-09-22.
Drop-in alternatives for DSPIC33CK128MP203T-I/M5 — 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 DSPIC33CK128MP203T-I/M5 (same form factor and footprint) — differing in Core, Package, Program Memory Size, RAM Size, Special Peripherals.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33CK128MP203T-E/M5
✅ Drop-In📋 Reference alternative (not in catalog)
DSPIC33CK128MP203T-H/M5
✅ Drop-In📋 Reference alternative (not in catalog)
DSPIC33CK128MP203-I/M5
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$1.79 / Unit
View Datasheet →DSPIC33CK128MP503T-I/M5
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$2.04 / Unit
View Datasheet →DSPIC33CK128MP203T-I/M5 Maximum Ratings & Electrical Characteristics
| Core | dsPIC33CK 16-bit DSC |
| Core Clock Frequency | 100 MHz |
| Program Memory Size | 128 KB (128K x 8) FLASH |
| RAM Size | 16 KB |
| Supply Voltage Range | 3.0 V to 3.6 V |
| Package | 36-UQFN (5x5 mm) with exposed pad |
| Pin Count | 36 |
| On-chip Operational Amplifiers | 3 |
| Analog Comparators | 3 |
| PWM | High-Resolution PWM |
| Special Peripherals | PTG (Programmable Toggle Generator) |
| Temperature Range | -40C to +85C (I grade) |
| Mounting Type | Surface Mount |
| Packaging | Tape & Reel (T suffix) |
| Programming Interface | ICSP via PGC/PGD (3.3V) |
| Family Features | High-Resolution PWM, CAN FD (family), Functional Safety (FuSa) support |
DSPIC33CK128MP203T-I/M5 36-uqfn (5x5 mm) with exposed pad Pin Configuration Guide
Pin configuration for DSPIC33CK128MP203T-I/M5 (36-uqfn (5x5 mm) with exposed pad 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 DSPIC33CK128MP203T-I/M5.
Refer to the datasheet for full pin configuration.
Typical Applications
DSPIC33CK128MP203T-I/M5 is suitable for 6 applications: Digital Power Supplies, BLDC / PMSM Motor Control, Digital Lighting and LED Drivers, Battery Charging Systems, Advanced Sensing and Control, High-Performance Embedded Control with Functional Safety.
Digital Power Supplies
The DSPIC33CK128MP203T-I/M5 fits digital power conversion because its 100 MHz dsPIC33CK core closes current-loop interrupts fast enough for LLC resonant converters, totem-pole PFC stages, and synchronous buck designs at switching frequencies above 100 kHz. The high-resolution PWM peripheral provides sub-nanosecond-effective duty-cycle resolution, which directly reduces output voltage jitter at high switching frequency - a parameter that fixed-resolution PWM controllers cannot match. The three on-chip op-amps buffer current-shunt signals before the fast ADC, cutting external component count and board area in compact converter designs. In a typical topology, the DSC samples input/output voltage and inductor current each switching cycle, executes the compensator in DSP math, and updates the PWM comparators with zero-cycle-latency writes, achieving loop bandwidths comparable to dedicated digital power controllers while retaining full firmware programmability for soft-start, fault handling, and telemetry.
Recommended
BLDC / PMSM Motor Control
Sensorless field-oriented control (FOC) of BLDC and PMSM motors is a primary target of the dsPIC33CK family, and the MP203 variant is specifically equipped for it: three operational amplifiers condition the three phase-current shunt signals, three comparators support overcurrent trip and zero-crossing detection in hardware, and the high-resolution PWM generates the six complementary gate signals with dead-time control. The 100 MHz core executes single-cycle MAC instructions, allowing a full FOC current loop (Clarke/Park transforms plus PI controllers) to complete well within typical PWM periods. With 16 KB of RAM, position-observer state and fault logs fit without external memory. In use, the DSC reads DC-bus and phase currents each PWM cycle, runs the FOC kernel, and applies hardware fault shutdown via the comparator outputs, giving deterministic sub-microsecond protection that software-only trip logic cannot guarantee on slower MCUs.
Recommended
Digital Lighting and LED Drivers
The DSPIC33CK128MP203T-I/M5 suits high-end digital lighting ballasts and LED drivers where dimming resolution and flicker control matter. The high-resolution PWM achieves effective resolutions far beyond 12 bits, enabling smooth deep-dim LED output without visible quantization steps, while the 100 MHz core handles constant-current regulation loops and communication protocols (DALI-style or PWM dimming inputs) concurrently. The on-chip comparators implement cycle-by-cycle overcurrent protection for the power stage without CPU intervention, and the PTG (Programmable Toggle Generator) can generate auxiliary timing sequences autonomously. In a typical design, one DSC closes the LED current loop via the ADC and op-amp front end while simultaneously managing dimming curves, temperature derating, and fault reporting, replacing a separate analog controller plus a housekeeping MCU with a single 36-pin UQFN device.
Recommended
Battery Charging Systems
Smart battery chargers require accurate current/voltage regulation, multi-stage charge profiling, and protective cutoffs - all areas where the DSPIC33CK128MP203T-I/M5 performs well. The 12-bit-class ADC paired with the three on-chip op-amps provides precise sensing of charge current, battery voltage, and temperature (via NTC inputs), while the high-resolution PWM drives the buck or flyback charging stage with fine granularity for tight CC/CV regulation at high efficiency. The 100 MHz DSP core executes charge-termination math (dV/dt, -delta-V, inflection-point detection) and safety state machines within loop deadlines. The 3.0V to 3.6V supply simplifies powering from auxiliary rails, and ICSP allows firmware-updatable charge algorithms in the field. Compared to analog charge controllers, firmware control enables adaptive profiles per battery chemistry without hardware changes.
Recommended
Advanced Sensing and Control
The DSPIC33CK128MP203T-I/M5 is positioned by Microchip for advanced sensing and control systems, where its analog integration and DSP throughput combine effectively. The three op-amps can be configured as instrumentation-style front ends for bridge sensors (pressure, load cell), the fast ADC with DMA streams samples to RAM without CPU loading, and the DSP engine applies FIR/IIR filters or FFT-based diagnostics on-chip. The PTG peripheral automates sensor-excitation timing sequences independently of the CPU. The 36-pin UQFN fits compact sensor nodes, and the -40C to +85C industrial grade covers unconditioned environments. Typical deployments include precision weigh-scale heads, industrial proximity and condition-monitoring probes, and adaptive control actuators, where the DSC replaces a discrete analog front end plus separate MCU, cutting BOM cost and improving calibration repeatability through firmware-defined gain and offset correction.
Recommended
High-Performance Embedded Control with Functional Safety
For general high-performance embedded control that must document its development process, the dsPIC33CK family carries Functional Safety (FuSa) support from Microchip, as noted in DigiKey's categorization of this device. The 100 MHz core, DMA channels, and multiple serial ports handle deterministic multitasking in industrial controllers, while hardware watchdog and reset supervision support safe-state designs. The 36-pin UQFN variant balances I/O availability with a compact 5x5 mm footprint for space-constrained control boards. In practice, designers partition the control loop into DMA-fed ADC sampling, DSP-math processing, and PWM output stages, achieving predictable worst-case latencies that are auditable for safety documentation. The -I temperature grade covers standard industrial operating envelopes, and ICSP-based field reprogramming enables firmware updates across installed fleets.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33CK128MP203T-I/M5 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33CK128MP203T-E/M5 | DSPIC33CK128MP203T-H/M5 | DSPIC33CK128MP503T-I/M5 |
|---|---|---|---|---|
| Package | 36-UQFN (5x5 mm) | 36-UQFN (5x5 mm) - same | 36-UQFN/PQCC (5x5 mm) - same | 36-UQFN (5x5 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core Speed | 100 MHz | 100 MHz | 100 MHz | 100 MHz |
| FLASH / RAM | 128 KB / 16 KB | 128 KB / 16 KB | 128 KB / 16 KB | 128 KB / 16 KB |
| Operating Temperature | -40C to +85C (I) | Extended grade (E), above +85C | -40C to +150C (H) | -40C to +85C (I) |
| Peripheral Emphasis | Digital power / motor control | Identical to this product | Identical to this product | CAN FD-oriented variant |
| 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 |
| Packaging | Tape & Reel (T) | Tape & Reel (T) | Tape & Reel (T) | Tape & Reel (T) |
Key Differentiators
- Three integrated op-amps for current sensing (vs DSPIC33CK128MP202-I/2N)
- Same-footprint high-temperature upgrade path (vs DSPIC33CK128MP203T-H/M5)
- 100 MHz dual-throughput core for high-frequency loops (vs DSPIC33CK128MP203T-E/M5)
Design Notes
The 36-pin UQFN exposed-pad package requires the exposed die pad to be soldered to a grounded copper pour for both thermal relief and signal integrity. Use an array of thermal vias (typically 3x3 to 4x4, filled or plugged) under the pad connecting to internal ground planes. Decouple each VDD pin with a 0.1uF ceramic capacitor placed within 2 mm of the pin, plus bulk 10uF at the board entry. Because the high-resolution PWM edges are fast, keep gate-drive traces short and route them away from analog current-sense traces feeding the on-chip op-amps.
During ICSP programming, the programmer must supply a stable 3.3V VDD - brown-out during programming can corrupt configuration words and brick the board until a full erase. Additionally, verify configuration settings for the correct voltage thresholds as noted in distributor documentation. When using the Peripheral Pin Select (PPS) remapping, remember that some analog functions (op-amps, comparators, ADC channels) are NOT remappable and are hard-wired to specific pins; check the datasheet pin table before finalizing the PCB netlist to avoid a respin.
Operating outside the 3.0V to 3.6V window is not permitted - the dsPIC33CK core runs from an internal LDO fed by VDD, so add the recommended external capacitor on the core-regulator pin per the datasheet power section. For digital power applications, derive the 3.3V rail from a small dedicated regulator rather than the noisy main power-stage rail, since ADC reference quality directly affects control-loop accuracy. Microchip's digital power reference designs for the dsPIC33CK family provide validated supply and layout templates worth reusing.
Compliance Information
RoHS, REACH, lead-free and halogen-free status were not stated in the retrieved distributor data for this exact ordering code; obtain the compliance certificate from the Microchip product page before specifying. Functional Safety (FuSa) support is noted by DigiKey categorization.
