DSPIC33CK128MP203-I/M5 - 100MHz 16-bit DSC, 128KB Flash | Microchip
MPN: DSPIC33CK128MP203-I/M5 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.35 | $2.35 |
| 10 | $2.21 | $22.10 |
| 100 | $2.01 | $201.00 |
| 500 | $1.89 | $945.00 |
| 1,000 | $1.79 | $1,790.00 |
DSPIC33CK128MP203-I/M5 Overview
A digital signal controller is a hybrid device that combines the computational throughput of a digital signal processor (DSP) with the peripheral integration and control-oriented architecture of a microcontroller (MCU). Within the power-management hierarchy, the DSC sits above general-purpose MCUs for real-time control loops, making dsPIC33C-class devices the preferred choice for digitally controlled power conversion and motor drive systems.
Key features of this part include the dsPIC33CK DSC core executing up to 100 MIPS over the full 3.0V to 3.6V operating range, three integrated operational amplifiers and three analog comparators that offload analog signal conditioning from external components, a peripheral trigger generator (PTG), high-resolution PWM, 12-bit ADCs, and CAN Flexible Data (CAN FD) support across the dsPIC33CK family. The dual-partition Flash with live update enables field firmware upgrades without a bootloader downtime window.
Architecturally, the device uses a modified Harvard architecture with a 24-bit instruction word, DSP multiply-accumulate and barrel shifter hardware, and DMA channels for moving ADC results and communication data without CPU intervention. ECC on program Flash protects against single-bit memory faults, supporting functional-safety (FuSa) development flows.
Typical applications include digital power supplies (LLC, totem-pole PFC), brushless DC and PMSM motor control, solar micro-inverters, and automotive sensing subsystems where the integrated op-amps directly amplify shunt or phase currents.
When designing with this controller, budget the 3.3V rail carefully and exploit the integrated op-amps to reduce BOM cost, but verify their bandwidth against your control-loop frequency.
This page synthesizes distributor pricing, drop-in family alternatives, and practical design notes not found in the manufacturer datasheet alone.
Drop-in alternatives for DSPIC33CK128MP203-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 DSPIC33CK128MP203-I/M5 (same form factor and footprint) — differing in Package, Core Architecture, Data SRAM, Operating Temperature, Program Flash.
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Request AlternativesDSPIC33CK128MP203-I/M5 Maximum Ratings & Electrical Characteristics
| Core Architecture | dsPIC33CK, 16-bit modified Harvard |
| Maximum Core Speed | 100 MHz (100 MIPS) |
| Program Flash | 128 KB (128K x 8), with ECC and dual-partition live update |
| Data SRAM | 16 KB, with MBIST |
| Supply Voltage Range | 3.0 V to 3.6 V |
| Operating Temperature | -40C to +85C (I grade) |
| Package | 36-UQFN (5x5 mm), exposed pad |
| Mounting Type | Surface Mount |
| Integrated Op-Amps | 3 |
| Integrated Comparators | 3 |
| ADC Resolution | 12-bit |
| CAN FD Support | Yes (family feature) |
| PWM | High-Resolution PWM |
| Peripheral Trigger Generator (PTG) | Yes |
| Qualification | Automotive grade per Findic listing |
DSPIC33CK128MP203-I/M5 36-uqfn (5x5 mm), exposed pad Pin Configuration Guide
Pin configuration for DSPIC33CK128MP203-I/M5 (36-uqfn (5x5 mm), 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 DSPIC33CK128MP203-I/M5.
Refer to the datasheet for full pin configuration.
Typical Applications
DSPIC33CK128MP203-I/M5 is suitable for 6 applications: Digital Power Supplies (LLC / Totem-Pole PFC), BLDC / PMSM Motor Control, Solar Micro-Inverters and Power Optimizers, Automotive Sensing and Control Subsystems, Advanced Sensing and Control Systems, Telecom and Server Power (DC-DC Bricks).
Digital Power Supplies (LLC / Totem-Pole PFC)
The DSPIC33CK128MP203-I/M5 fits digitally controlled power conversion because its 100 MHz core can close current and voltage loops at switching frequencies in the hundreds of kHz range, and its high-resolution PWM provides sub-nanosecond duty-cycle resolution for LLC and totem-pole PFC stages. The 12-bit ADC synchronized to PWM events samples input and output conditions at the optimal instant, minimizing switching-noise-induced error. Placed as the sole controller on the power board, it uses the peripheral trigger generator to chain ADC sampling to PWM events without CPU latency, and the dual-partition Flash enables live firmware updates in the field. The trade-off versus fixed-function controllers is firmware development effort, repaid by design flexibility across power ratings.
Recommended
BLDC / PMSM Motor Control
For brushless DC and permanent-magnet synchronous motor drives, the DSPIC33CK128MP203-I/M5 offers center-aligned high-resolution PWM for three-phase inverters and three integrated op-amps that amplify low-side shunt currents directly, removing external amplifier ICs from the BOM. Field-oriented control requires fast sine/cosine and PI computation, which the 100 MIPS DSP core with multiply-accumulate hardware executes well within a 100 kHz loop budget. The 3 comparators support hardware overcurrent trip without software latency. Firmware can be developed on Microchip's motor-control libraries, and the 36-pin UQFN 5x5 mm footprint suits compact integrated motor drives in fans, pumps, and power tools where board area is a hard constraint.
Recommended
Solar Micro-Inverters and Power Optimizers
In solar micro-inverter designs, the DSPIC33CK128MP203-I/M5 executes maximum-power-point-tracking algorithms at the 100 MHz core rate while simultaneously generating PWM for the DC-DC boost and grid-tied inverter stages. Its 128 KB Flash with ECC provides headroom for MPPT, grid-monitoring, and safety code, and ECC guards against single-bit memory corruption in high-temperature outdoor enclosures. The CAN FD family interface (on equipped family members or via external transceiver support) links multiple inverters into a monitoring string. The integrated op-amps condition current-shunt signals for both MPPT and anti-islanding detection, keeping analog component count low in the thermally constrained panel-mounted enclosure.
Recommended
Automotive Sensing and Control Subsystems
Distributor data classifies the DSPIC33CK128MP203-I/M5 as an automotive-grade part, and the dsPIC33CK family is supported by Microchip functional-safety (FuSa) packages, making it suitable for automotive sensor fusion, actuator control, and auxiliary power subsystems. The device operates from a regulated 3.3V rail over -40C to +85C, and its MBIST-enabled SRAM plus ECC Flash support safety analyses required in vehicle electronics. The 3 op-amps amplify sensor bridge outputs (pressure, position, current) locally, reducing noise pickup on harness routing. Designers should follow Microchip's safety manual and qualify the surrounding circuit against the vehicle OEM's AEC-Q requirements for the complete module.
Recommended
Advanced Sensing and Control Systems
The DSPIC33CK128MP203-I/M5 suits advanced sensing nodes that combine analog front-end conditioning with real-time decision logic. Its three op-amps and three comparators form a compact analog front end for bridge, shunt, or capacitive sensors, while the 12-bit ADC digitizes results for digital filtering executed on the DSP core. The peripheral trigger generator automates sensor sampling sequences without CPU intervention, freeing MIPS for algorithm processing such as FFT-based vibration analysis. Field-deployed units benefit from dual-partition live-update Flash, allowing algorithm updates over a communication link without a maintenance stop. Typical deployments include predictive-maintenance monitors and industrial condition-based control systems.
Recommended
Telecom and Server Power (DC-DC Bricks)
In telecom rectifiers and server VRM/power-shelf designs, the DSPIC33CK128PM203's 100 MHz core controls high-frequency LLC and buck stages with the sub-ns PWM resolution needed for fixed-ratio and regulated topologies. Its deterministic interrupt and DMA structure keeps ADC-to-PWM latency low and repeatable, a hard requirement for current-mode control stability at high switching frequencies. PMBus-style telemetry can be layered on its serial interfaces for power-management bus integration, and CAN FD support simplifies daisy-chained shelf management. The 36-UQFN 5x5 mm package with exposed pad gives low thermal impedance into the power-board ground plane, important in the convection-limited environments of telecom shelves.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33CK128MP203-I/M5 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33CK128MP203-E/M5 | DSPIC33CK256MP203-I/M5 | DSPIC33CK64MP203-I/M5 | DSPIC33CK32MP203-I/M5 |
|---|---|---|---|---|---|
| Package | 36-UQFN (5x5 mm) | 36-UQFN (5x5 mm) - same | 36-UQFN (5x5 mm) - same | 36-UQFN (5x5 mm) - same | 36-UQFN (5x5 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core Speed | 100 MHz (100 MIPS) | 100 MHz | 100 MHz | 100 MHz | 100 MHz |
| Program Flash | 128 KB | 128 KB | 256 KB | 64 KB | 32 KB |
| SRAM | 16 KB | 16 KB | 16 KB | 16 KB | 16 KB |
| Operating Temperature | -40C to +85C (I) | -40C to +125C (E) | -40C to +85C (I) | -40C to +85C (I) | -40C to +85C (I) |
| Integrated Op-Amps | 3 | 3 | 3 | 3 | 3 |
| ECC / Live Update Flash | Yes | Yes | Yes | Yes | Yes |
Key Differentiators
- Balanced 128 KB Flash for full control + communication stacks (vs DSPIC33CK64MP203-I/M5)
- Extended-temperature sibling available with zero layout change (vs DSPIC33CK128MP203-E/M5)
- Optimal cost-per-Flash point in the 36-pin family (vs DSPIC33CK256MP203-I/M5)
Design Notes
Supply the DSPIC33CK128MP203-I/M5 from a clean 3.3V rail within the 3.0V to 3.6V datasheet window. Place a 0.1 uF ceramic capacitor at each VDD pin and at least one 4.7 uF bulk capacitor near the UQFN package; the 100 MHz core switching activity produces fast current transients that small decoupling alone may not cover. The exposed pad is the primary thermal and ground return path - solder it to a solid ground pour with multiple vias, both for heat spreading and for the low-inductance ground reference the ADC and op-amps need for accurate readings.
For in-circuit serial programming (ICSP), the device offers multiple PGECx/PGEDx pairs and they must be used as matched pairs - if PGEC2 carries ICSPCLK, then PGED2 must carry ICSPDAT, per the datasheet programming section. Mixing pins from different pairs is a common bring-up failure. Also, when migrating firmware from smaller-family members (DSPIC33CK64MP203 or DSPIC33CK32MP203) to this 128 KB part, verify linker scripts and dual-partition configuration bits, since the Flash partition size changes with the memory option.
Route the op-amp feedback and shunt-sense traces as short Kelvin connections directly to the op-amp input pins; the three integrated op-amps are intended to sit close to current-shunt resistors, and long shared traces reintroduce the noise the integration was meant to remove. Keep high dv/dt switch nodes away from analog inputs, and use the peripheral trigger generator to synchronize ADC sampling to PWM edges so samples are taken during stable current plateaus rather than during switching transitions.
Compliance Information
Distributor listings (Findic, DigiKey) describe this part as automotive grade with functional safety (FuSa) support. Exact RoHS/REACH/lead-free status must be confirmed on the Microchip product page for the specific date code.
