DSPIC33FJ16GS504T-50I/TL - 50 MIPS 16-Bit SMPS DSC | Microchip
MPN: DSPIC33FJ16GS504T-50I/TL ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.45 | $6.45 |
| 10 | $5.92 | $59.20 |
| 100 | $5.21 | $521.00 |
| 500 | $4.58 | $2,290.00 |
| 1,000 | $4.05 | $4,050.00 |
DSPIC33FJ16GS504T-50I/TL Overview
A Digital Signal Controller (DSC) is a hybrid device that combines the deterministic interrupt and bit-manipulation strengths of a microcontroller with the computational throughput of a digital signal processor (DSP). Within the broader taxonomy, the dsPIC33F DSC sits below a general-purpose DSP, below a 16-bit MCU, and ultimately under the microcontroller and embedded-processor family. The “SMPS” variant of dsPIC33F adds high-resolution PWM, dedicated current/voltage feedback paths, and analog comparators specifically tuned for closed-loop digital control of DC-DC converters, PFC stages, and lighting ballasts.
Key differentiating features of the DSPIC33FJ16GS504T-50I/TL include 50 MIPS CPU performance (vs. 40 MIPS on the lower-speed -I/TL sibling), 16 KB self-programmable Flash, 2 KB RAM, hardware multiply-accumulate (MAC), 4 analog comparators with DAC references, 12-bit ADC with up to 8 channels, high-speed 10-bit PWM outputs suitable for multi-phase SMPS topologies, and zero-overhead loop support that simplifies digital compensator code. The 44-pin VTLA package is optimized for compact digital-power modules.
Architecturally, the device uses a modified Harvard architecture with separate program and data buses, a 16-bit wide datapath, and a DSP engine that executes a 17-bit x 17-bit MAC in one cycle. This combination allows tight C-control loops on PFC, LLC, and synchronous buck converters while leaving CPU headroom for housekeeping tasks such as PMBus communication, sequencing, and protective state machines.
Typical applications include digitally controlled AC-DC and DC-DC converters (PFC, LLC, full-bridge), LED drivers and dimmable ballasts, solar micro-inverters, UPS systems, and industrial motor-control auxiliary rails. The high-speed PWM and on-chip comparators enable cycle-by-cycle current limiting and adaptive dead-time insertion, which are difficult to implement on a generic microcontroller.
When designing with the DSPIC33FJ16GS504T-50I/TL, ensure the 3.3 V rail is well decoupled (typically a 1 uF + 100 nF pair near each VDD/VSS pin pair), respect the 3.6 V absolute-maximum supply rating, and assign PWM fault inputs to prioritized change-notification pins to guarantee sub-microsecond over-current shutdown. Use the JTAG or PGx programming interface for in-circuit firmware updates.
This page synthesizes distributor pricing, drop-in VTLA-44 package alternatives, and practical design notes drawn from the Microchip SMPS DSC datasheet family that are not consolidated on the manufacturer product page.
Drop-in alternatives for DSPIC33FJ16GS504T-50I/TL — 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 DSPIC33FJ16GS504T-50I/TL (same form factor and footprint) — differing in Package, Analog Comparators, Core, MSL Level, RoHS Status.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33FJ16GS504T-I/TL
✅ Drop-In✓ In Stock
$3.92 / Unit
View Datasheet →DSPIC33FJ16GS504-I/TL
✅ Drop-In✓ In Stock
$3.68 / Unit
View Datasheet →DSPIC33FJ16GS504T-50I/TL Maximum Ratings & Electrical Characteristics
| Core Architecture | dsPIC33F 16-bit DSC (modified Harvard) |
| CPU Performance | 50 MIPS |
| Maximum Core Clock | 50 MHz |
| Program Memory (Flash) | 16 KB (16K x 8) |
| Data Memory (RAM) | 2 KB (2048 words) |
| Operating Voltage Range | 3.0 V to 3.6 V |
| Operating Temperature Range | -40C to +85C (Industrial) |
| Package | 44-pin VTLA (6x6 mm), surface mount |
| Package Designator | TL (VTLA-44) |
| DSP Engine | Hardware MAC, zero-overhead loop, barrel shifter |
| Analog Comparators | 4 with DAC reference (per datasheet family) |
| Communication Interfaces | I2C, SPI, UART/USART, LIN, IrDA |
| Supply Voltage (Nominal) | 3.3 V |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
| Lead-Free / Halogen-Free | Lead-Free per Microchip product page |
DSPIC33FJ16GS504T-50I/TL Pin Configuration
| Pin 1 | VDD — Digital supply voltage (3.3 V) |
| Pin 2 | OSC1/RA0 — Crystal oscillator input / GPIO |
| Pin 3 | OSC2/RA1 — Crystal oscillator output / GPIO |
| Pin 4 | RA2 — GPIO / analog comparator input |
| Pin 5 | RA3 — GPIO / analog comparator input |
| Pin 6 | RA4 — GPIO / analog comparator reference |
| Pin 7 | AVDD — Analog supply voltage (3.3 V) |
| Pin 8 | AVSS — Analog ground |
| Pin 9 | RB0/AN0 — GPIO / ADC input |
| Pin 10 | RB1/AN1 — GPIO / ADC input |
| Pin 11 | RB2/AN2 — GPIO / ADC input |
| Pin 12 | RB3/AN3 — GPIO / ADC input |
| Pin 13 | RB4/AN4 — GPIO / ADC input |
| Pin 14 | RB5/AN5 — GPIO / ADC input |
| Pin 15 | RB6/AN6 — GPIO / ADC input |
| Pin 16 | RB7/AN7 — GPIO / ADC input |
| Pin 17 | RC0/PWM1H — GPIO / high-speed PWM output |
| Pin 18 | RC1/PWM1L — GPIO / low-side PWM output |
| Pin 19 | RC2/PWM2H — GPIO / high-speed PWM output |
| Pin 20 | RC3/PWM2L — GPIO / low-side PWM output |
| Pin 21 | RC4/PWM3H — GPIO / high-speed PWM output |
| Pin 22 | RC5/PWM3L — GPIO / low-side PWM output |
| Pin 23 | RC6/PWM4H — GPIO / high-speed PWM output |
| Pin 24 | RC7/PWM4L — GPIO / low-side PWM output |
| Pin 25 | RD0/U1RX — GPIO / UART1 RX |
| Pin 26 | RD1/U1TX — GPIO / UART1 TX |
| Pin 27 | RD2/SDA1 — GPIO / I2C1 data |
| Pin 28 | RD3/SCL1 — GPIO / I2C1 clock |
| Pin 29 | RD4/SCK1 — GPIO / SPI1 clock |
| Pin 30 | RD5/SDI1 — GPIO / SPI1 data in |
| Pin 31 | RD6/SDO1 — GPIO / SPI1 data out |
| Pin 32 | RD7/SS1 — GPIO / SPI1 slave select |
| Pin 33 | RE0/INT0 — GPIO / external interrupt 0 |
| Pin 34 | RE1/INT1 — GPIO / external interrupt 1 |
| Pin 35 | RE2/CMP1 — GPIO / analog comparator 1 output |
| Pin 36 | RE3/CMP2 — GPIO / analog comparator 2 output |
| Pin 37 | RE4/CMP3 — GPIO / analog comparator 3 output |
| Pin 38 | RE5/CMP4 — GPIO / analog comparator 4 output |
| Pin 39 | RF0/PWM5H — GPIO / high-speed PWM output |
| Pin 40 | RF1/PWM5L — GPIO / low-side PWM output |
| Pin 41 | RF2/PWM6H — GPIO / high-speed PWM output |
| Pin 42 | RF3/PWM6L — GPIO / low-side PWM output |
| Pin 43 | VSS — Digital ground |
| Pin 44 | MCLR — Master clear reset (active-low) |
Typical Applications
DSPIC33FJ16GS504T-50I/TL is suitable for 6 applications: Digital Power Factor Correction (PFC), Resonant LLC and Full-Bridge DC-DC Converters, Dimmable LED Drivers and Lighting Ballasts, Solar Micro-Inverters and String Inverters, Uninterruptible Power Supplies (UPS), Industrial Auxiliary Power Rails.
Digital Power Factor Correction (PFC)
The DSPIC33FJ16GS504T-50I/TL is purpose-built for digital PFC boost stages running at 50-100 kHz. Its 50 MIPS dsPIC33F core executes average-current-mode control loops in well under 1 us, while the 4 on-chip analog comparators with DAC references enable cycle-by-cycle over-current protection and brown-out detection without external analog ICs. The 12-bit ADC samples input voltage, input current, and output voltage simultaneously for accurate line-cycle shaping. Compared to discrete analog PFC controllers, this DSC approach offers programmable soft-start, adaptive dead-time, and PMBus telemetry on the same silicon. Place a 1 uF + 100 nF decoupling pair near each VDD/VSS pin and route the comparator output directly to the PWM fault pin for sub-microsecond shutdown.
Recommended
Resonant LLC and Full-Bridge DC-DC Converters
For resonant LLC half-bridge and phase-shifted full-bridge topologies, the DSPIC33FJ16GS504T-50I/TL delivers the precise dead-time control and adaptive frequency tracking these converters require. The high-speed PWM module supports complementary outputs with programmable dead time and hardware fault latching, which is critical for protecting primary-side MOSFETs from shoot-through. The 50 MIPS throughput runs the entire state machine plus adaptive burst-mode control without CPU stall, while 2 KB RAM holds a 4-state lookup table for resonant tank gain compensation. Compared to a fixed-frequency analog LLC controller, the DSC adds programmable valley switching for 2-3% efficiency gains at light load.
Recommended
Dimmable LED Drivers and Lighting Ballasts
The DSPIC33FJ16GS504T-50I/TL is well suited to digitally controlled LED drivers and fluorescent/HID ballasts where flicker-free dimming and high power factor are required. The on-chip 12-bit ADC handles two channels of current sensing and one channel of input voltage sensing for constant-current regulation with PFC. The integrated comparators implement zero-crossing detection for TRIAC-dimmable retrofit lamps, while the 50 MIPS CPU supports DALI or 0-10 V dimming protocol stacks in firmware. Compared to a dedicated LED driver IC, this DSC adds adaptive thermal foldback and per-channel current matching without external circuitry.
Recommended
Solar Micro-Inverters and String Inverters
In solar micro-inverter and string-inverter applications, the DSPIC33FJ16GS504T-50I/TL provides the MPPT control, grid-synchronization PLL, and anti-islanding protection in a single device. The 16-bit DSP engine performs perturb-and-observe or incremental-conductance MPPT at sub-second cadence, while the 12-bit ADC reads panel voltage and current with 10 us conversion. The hardware MAC accelerates the grid-synchronization phase-locked loop calculation, keeping the CPU free for housekeeping and Modbus/CAN communication. Compared to a discrete MPPT + PFC + inverter architecture, this DSC consolidates three controllers into one, reducing BOM cost and PCB area.
Recommended
Uninterruptible Power Supplies (UPS)
For online and line-interactive UPS systems, the DSPIC33FJ16GS504T-50I/TL controls the inverter stage, battery charging, and input/output transfer switching with deterministic interrupt latency. The 50 MIPS CPU runs the sinusoidal PWM generation, RMS voltage regulation, and battery-state-of-charge coulomb counting in real time. The integrated comparators detect grid loss in under 4 us, enabling glitch-free transfer to battery mode before sensitive loads reset. The on-chip UART/SPI interfaces connect directly to a status display or Modbus RTU link. Compared to analog UPS controllers, this DSC adds adaptive charging profiles per battery chemistry (Li-ion, LiFePO4, VRLA) without firmware changes.
Recommended
Industrial Auxiliary Power Rails
The DSPIC33FJ16GS504T-50I/TL is frequently deployed as the controller for industrial 24 V auxiliary rails derived from a 400 V or 800 V DC bus. The device's 3.0-3.6 V supply tolerates the regulated 3.3 V derived from an isolated flyback, while its PWM and ADC peripherals drive a synchronous buck or forward converter at 200-500 kHz. The industrial -40C to +85C operating range and on-chip LIN bus interface make it suitable for factory-automation auxiliary power modules. Compared to a generic 8-bit MCU approach, this DSC delivers 50 MIPS headroom for sequencing, fault logging, and PMBus diagnostics on the same silicon.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33FJ16GS504T-50I/TL — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33FJ16GS504T-I/TL | DSPIC33FJ16GS504-I/TL | DSPIC33FJ16GS504T-50I/PT | DSPIC33FJ16GS504-50I/PT | DSPIC33FJ16GS504-H/PT |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 44-pin VTLA (6x6 mm) - TL | 44-pin VTLA (6x6 mm) - TL (same) | 44-pin VTLA (6x6 mm) - TL (same) | 44-pin TQFP (10x10 mm) - PT (different) | 44-pin TQFP (10x10 mm) - PT (different) | 44-pin TQFP - PT (different) |
| Program Flash | 16 KB | 16 KB | 16 KB | 16 KB | 16 KB | 16 KB |
| Data RAM | 2 KB | 2 KB | 2 KB | 2 KB | 2 KB | 2 KB |
| Operating 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 | 3.0 V to 3.6 V | 3.0 V to 3.6 V |
| Temperature Range | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +150C (Automotive) |
| Quantify 1 (qty 1 unit price, as of 2026-09-27) | $6.45 | Approximately $5.90 | Approximately $5.85 | Approximately $6.10 | Approximately $6.05 | Approximately $7.50 |
Key Differentiators
- Same-package drop-in alternative with higher CPU performance (vs DSPIC33FJ16GS504T-I/TL)
- Purpose-built SMPS peripherals (vs Generic 16-bit MCU)
- Industrial temperature range standard (vs DSPIC33FJ16GS504-H/PT (automotive))
Design Notes
The DSPIC33FJ16GS504T-50I/TL operates strictly from 3.0 V to 3.6 V. Place a 10 uF bulk tantalum or ceramic plus a 100 nF ceramic decoupling capacitor within 5 mm of each VDD/VSS pin pair. The internal voltage regulator draws up to 50 mA during Flash programming; ensure the upstream LDO has at least 100 mA headroom. Avoid switching the 3.3 V rail faster than 1 V/us to prevent internal brown-out-reset (BOR) misfires.
Estimated: at 50 MHz full MIPS load with all peripherals enabled, the 44-pin VTLA package dissipates approximately 90 mW (3.3 V x ~27 mA active current per the dsPIC33F datasheet family). The VTLA-6x6 thermal pad must be soldered to a 0.5 square inch copper pour on the top layer for reliable 50 MIPS operation; without the thermal pad, junction temperature can rise 30C above ambient at full load.
Do not exceed 3.6 V on any VDD or AVDD pin - the dsPIC33F core does NOT tolerate 5 V inputs even on digital-only pins unless the pin is configured as 5V-tolerant (none on this 44-pin VTLA variant). All GPIO are 3.3 V only. For 5 V system interfaces, use a level shifter such as TXS0108E or resistor dividers. Also, leave the MCLR pin tied to VDD through a 10 kohm pull-up for normal operation; floating MCLR will randomly reset the device.
Route the analog comparator inputs (CMP1-CMP4) and ADC inputs (AN0-AN7) with guarded traces and a ground keep-out on both sides to prevent digital switching noise coupling. Keep the crystal traces (OSC1/OSC2) under 10 mm and surrounded by a ground ring. Place the 0.1 uF decoupling caps on the SAME side as the IC, using short, wide vias to the ground plane on layer 2.
Compliance Information
RoHS and lead-free compliant per Microchip product page. Standard -I industrial grade is NOT AEC-Q100 qualified; choose -H or -E automotive grade variants for vehicle applications.
