DSPIC33FJ16GS504-H/PT - 16-bit SMPS DSC, 40MHz, 16KB Flash | Microchip
MPN: DSPIC33FJ16GS504-H/PT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.5 | $6.50 |
| 10 | $5.85 | $58.50 |
| 100 | $5.2 | $520.00 |
| 500 | $4.65 | $2,325.00 |
| 1,000 | $4.1 | $4,100.00 |
DSPIC33FJ16GS504-H/PT Overview
What is a Digital Signal Controller (DSC)? A DSC is a hybrid device that combines the deterministic interrupt and peripheral architecture of a microcontroller with the high-throughput arithmetic capability of a Digital Signal Processor (DSP). Within the broader taxonomy, this part sits at: DSC -> microcontroller -> embedded controller -> semiconductor. The dsPIC33F family is widely used in switch-mode power supply (SMPS) and digital power conversion, where its DSP engine executes voltage and current loops in hardware while the CPU handles housekeeping and communication.
Key features include four high-speed PWM channels with up to 1 ns resolution, four high-speed analog comparators with direct PWM connection (no software latency), a 10-bit ADC with up to 4 MSPS, and on-chip peripherals tuned for multi-loop digital power topologies. The device operates from 3.0 V to 3.6 V and integrates Peripheral Pin Select (PPS) for flexible pin assignment.
Architecturally, the DSPIC33FJ16GS504 combines a 16-bit modified Harvard MCU core with a single-cycle MAC DSP engine, two 40-bit accumulators, and a barrel shifter. The result is a controller that can close voltage-mode and peak-current-mode control loops in firmware without external analog components, while still fitting in a 10x10 mm TQFP footprint.
Typical applications include digital switch-mode power supplies (AC-DC, DC-DC, PFC), uninterruptible power supplies, solar microinverters, grid-tie inverters, and digital lighting ballasts. The combination of high-speed PWM, fast comparators, and DSP throughput makes it a strong fit for high-frequency, multi-loop converter designs.
When designing with this device, verify that the high-temperature grade matches your application's thermal envelope; the parallel DSPIC33FJ16GS504-I/PT (-40C to +85C) is the commercial alternative. Decoupling and ground plane layout are critical because analog and switching currents share the same silicon.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, helping engineers select and source the right SMPS-focused DSC for their power-conversion design.
Drop-in alternatives for DSPIC33FJ16GS504-H/PT — 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 DSPIC33FJ16GS504-H/PT (same form factor and footprint) — differing in Package, ADC, Core Architecture, Operating Temperature, Maximum CPU Speed.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33FJ16GS504-I/PT
✅ Drop-In✓ In Stock
$2.35 / Unit
View Datasheet →DSPIC33FJ16GS504-E/ML
✅ Drop-In✓ In Stock
$6.21 / Unit
View Datasheet →DSPIC33FJ16GS504-50I/PT
✅ Drop-In✓ In Stock
$3.18 / Unit
View Datasheet →DSPIC33FJ16GS502T-I/SO
✅ Drop-In✓ In Stock
$2.95 / Unit
View Datasheet →DSPIC33FJ16GS502-I/SP
✅ Drop-In✓ In Stock
$3.18 / Unit
View Datasheet →DSPIC33FJ16GS504-H/PT Maximum Ratings & Electrical Characteristics
| Core Architecture | dsPIC33F 16-bit DSC (MCU + DSP engine) |
| Program Memory (Flash) | 16 KB |
| Data Memory (SRAM) | 2 KB (2048 words) |
| Program Memory Width | 24-bit |
| Maximum CPU Speed | 40 MIPS (40 MHz) |
| Supply Voltage (VDD) | 3.0 V to 3.6 V |
| I/O Pins | 35 |
| High-Speed PWM Channels | 4 |
| High-Speed Comparators | 4 (with direct PWM connection) |
| ADC | 10-bit, up to 4 MSPS |
| Operating Temperature Range | -40C to +150C (H grade) |
| Package | 44-pin TQFP (PT), 10x10 mm |
| Mounting Type | Surface Mount |
| Process Technology | CMOS |
| RoHS Status | Compliant (Lead-free) |
| Peripheral Pin Select (PPS) | Yes |
| DSP Engine | Single-cycle MAC, dual 40-bit accumulators |
DSPIC33FJ16GS504-H/PT Pin Configuration
| Pin 1 | RP20/PMD5/RB5 — I/O / PWM output |
| Pin 2 | RP21/PMD6/RB6 — I/O / PWM output |
| Pin 3 | RP22/PMD7/RB7 — I/O / PWM output |
| Pin 4 | RP23/PMD8/RB8 — I/O / PWM output |
| Pin 5 | RP24/PMD9/RB9 — I/O / PWM output |
| Pin 6 | VDD — Digital supply voltage (3.0-3.6 V) |
| Pin 7 | VSS — Digital ground |
| Pin 8 | OSC1/CLKI/RC12 — External clock input or crystal oscillator input |
| Pin 9 | OSC2/CLKO/RC15 — External clock output or crystal oscillator output |
| Pin 10 | FLTA/RA4 — PWM fault input |
| Pin 11 | RA5 — I/O port |
| Pin 12 | RA6 — I/O port |
| Pin 13 | RA7 — I/O port |
| Pin 14 | RA8 — I/O port |
| Pin 15 | RA9 — I/O port |
| Pin 16 | AVDD — Analog supply voltage |
| Pin 17 | AVSS — Analog ground |
| Pin 18 | AN0/CMP1A/RA0 — Analog input / comparator input |
| Pin 19 | AN1/CMP1B/RA1 — Analog input / comparator input |
| Pin 20 | AN2/CMP2A/RA2 — Analog input / comparator input |
| Pin 21 | AN3/CMP2B/RA3 — Analog input / comparator input |
| Pin 22 | AN4/CMP3A/RB0 — Analog input / comparator input |
| Pin 23 | AN5/CMP3B/RB1 — Analog input / comparator input |
| Pin 24 | AN6/CMP4A/RB2 — Analog input / comparator input |
| Pin 25 | AN7/CMP4B/RB3 — Analog input / comparator input |
| Pin 26 | VREF+/VDD_CORE — Voltage reference / core voltage |
| Pin 27 | VREF- — Voltage reference negative |
| Pin 28 | RP0/PWM1H/RC0 — PWM high output 1 |
| Pin 29 | RP1/PWM1L/RC1 — PWM low output 1 |
| Pin 30 | RP2/PWM2H/RC2 — PWM high output 2 |
| Pin 31 | RP3/PWM2L/RC3 — PWM low output 2 |
| Pin 32 | RP4/PWM3H/RC4 — PWM high output 3 |
| Pin 33 | RP5/PWM3L/RC5 — PWM low output 3 |
| Pin 34 | RP6/PWM4H/RC6 — PWM high output 4 |
| Pin 35 | RP7/PWM4L/RC7 — PWM low output 4 |
| Pin 36 | RP8/RC8 — I/O port |
| Pin 37 | RP9/RC9 — I/O port |
| Pin 38 | RP10/RC10 — I/O port |
| Pin 39 | RP11/RC11 — I/O port |
| Pin 40 | RP16/INT0/RC16 — I/O port / external interrupt |
| Pin 41 | RP17/RC17 — I/O port |
| Pin 42 | RP18/RC18 — I/O port |
| Pin 43 | RP19/RC19 — I/O port |
| Pin 44 | MCLR — Master clear reset (active low) |
Typical Applications
DSPIC33FJ16GS504-H/PT is suitable for 6 applications: Switch-Mode Power Supply (SMPS) Control, Power Factor Correction (PFC) Front Stage, Solar Microinverter / Grid-Tie Inverter, Uninterruptible Power Supply (UPS), Digital Lighting Ballast / LED Driver, Automotive 12V/48V DC-DC Converter.
Switch-Mode Power Supply (SMPS) Control
The DSPIC33FJ16GS504-H/PT's 4 high-speed PWM outputs with sub-cycle adjustment and 4 high-speed comparators with direct hardware connection to the PWM generator make it ideal for multi-loop SMPS controllers. At 40 MIPS, the DSC can close peak-current-mode and average-current-mode control loops in firmware with no software latency in the current-sensing path. The 16 KB Flash holds a PFC plus DC-DC state machine plus UART/I2C housekeeping, while 2 KB SRAM is sufficient for two PI loops with anti-windup. Compared with discrete analog controllers, the H-grade part replaces dozens of analog components, reduces BOM cost, and enables firmware-tunable compensation and soft-start. The 150C thermal rating also allows placement near magnetics in tightly enclosed industrial converters without thermal derating.
Recommended
Power Factor Correction (PFC) Front Stage
Active PFC stages demand fast ADC sampling synchronized to the AC line and low-latency PWM duty updates, both of which the DSPIC33FJ16GS504-H/PT delivers. The 10-bit 4 MSPS ADC can sample input voltage and current at rates exceeding 100 kHz without CPU bottlenecks, while the DSP MAC engine computes the instantaneous power and target boost duty cycle in firmware. The four high-speed comparators provide cycle-by-cycle overcurrent protection that ties directly into the PWM shutdown path, bypassing software. In a typical CCM boost PFC, the controller maintains near-unity power factor across 85-265 VAC input, drawing only the active power from the line. The -40C to +150C H grade is important when the PFC stage sits adjacent to a hot rectifier bridge or output rectifier heatsink.
Recommended
Solar Microinverter / Grid-Tie Inverter
Grid-tie microinverters require sine PWM generation, MPPT algorithm execution, anti-islanding detection, and grid synchronization, all under tight real-time deadlines. The DSPIC33FJ16GS504-H/PT's 40 MIPS DSC core plus 4 high-speed PWM channels drives a full-bridge or HERIC inverter topology with the DSP engine calculating the sine reference and dead-time compensation in firmware. The integrated ADC samples PV panel voltage, current, and grid voltage with synchronization to zero-cross detection. The 16 KB Flash holds MPPT (typically incremental conductance or P&O) plus grid-tie logic, while 2 KB SRAM maintains sine tables and state variables. The 150C junction rating enables outdoor enclosure designs where ambient can exceed 70C under direct sun exposure.
Recommended
Uninterruptible Power Supply (UPS)
Line-interactive and double-conversion UPS systems use a DSC to manage inverter control, battery charging, and load transfer. The DSPIC33FJ16GS504-H/PT's high-speed comparators detect AC line sag or dropout and trigger transfer to inverter mode within microseconds, while the DSP engine drives the inverter PWM at line-synchronized frequency. The 16 KB Flash accommodates battery charge profiles (sealed lead-acid, LiFePO4, Li-ion) plus inverter control, and the 150C H grade supports placement near battery cabinets where temperatures can climb during high-rate charge cycles. Four high-speed PWM channels can drive both the inverter full-bridge and the battery charger buck stage simultaneously.
Recommended
Digital Lighting Ballast / LED Driver
High-power LED drivers and fluorescent/HID ballasts benefit from the DSPIC33FJ16GS504-H/PT's high-frequency PWM and DSP-driven current regulation. At 40 MIPS, the controller can drive a resonant LLC or PFC plus LLC ballast topology at switching frequencies up to several hundred kHz, with the DSP engine executing RMS current sensing and dimming control. The 10-bit ADC at 4 MSPS handles fast current loops for constant-current LED regulation, while the high-speed comparators provide overcurrent and short-circuit protection. The H-grade 150C thermal rating is well-suited to enclosed luminaires and outdoor streetlight ballasts where ambient temperatures can exceed 85C.
Recommended
Automotive 12V/48V DC-DC Converter
48V mild-hybrid automotive power converters demand a controller qualified for under-hood temperatures and capable of running multi-phase synchronous buck or boost topologies. The DSPIC33FJ16GS504-H/PT's -40C to +150C operating range, 4 high-speed PWM outputs, and DSP engine for current sharing make it well-suited to 48V-to-12V or 12V-to-48V converters in mild-hybrid electrical systems. The high-speed comparators provide cycle-by-cycle current balancing across phases, while the ADC samples inductor currents and output voltage for average-current-mode control. The 16 KB Flash holds cold-crank, load-dump, and fault-recovery state machines required for AEC-Q100-style automotive environments.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33FJ16GS504-H/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33FJ16GS504-I/PT | DSPIC33FJ16GS504-E/ML | DSPIC33FJ16GS504-50I/PT | DSPIC33FJ16GS502T-I/SO | DSPIC33FJ16GS502-I/SP |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | TQFP-44 (10x10 mm) | TQFP-44 (10x10 mm) | TQFP-44 (10x10 mm) | TQFP-44 (10x10 mm) | TQFP-44 (10x10 mm) | TQFP-44 (10x10 mm) |
| Temperature Grade | -40C to +150C (H) | -40C to +85C (I) | -40C to +125C (E) | -40C to +85C (I) | -40C to +85C (I) | -40C to +85C (I) |
| Flash Memory | 16 KB | 16 KB | 16 KB | 16 KB | 16 KB | 16 KB |
| SRAM | 2 KB | 2 KB | 2 KB | 2 KB | 2 KB | 2 KB |
| Maximum CPU Speed | 40 MHz (40 MIPS) | 40 MHz | 40 MHz | 50 MHz | 40 MHz | 40 MHz |
| High-Speed PWM Outputs | 4 pairs (8 channels) | 4 pairs (8 channels) | 4 pairs (8 channels) | 4 pairs (8 channels) | Reduced PWM set (502 family) | Reduced PWM set (502 family) |
| High-Speed Comparators | 4 | 4 | 4 | 4 | Reduced comparator set (502 family) | Reduced comparator set (502 family) |
| 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 | 3.0 V to 3.6 V | 3.0 V to 3.6 V |
Key Differentiators
- Highest temperature grade in the 504 family (vs DSPIC33FJ16GS504-I/PT)
- Drop-in scalability to higher CPU speed (vs DSPIC33FJ16GS504-50I/PT)
- Full peripheral count vs 502 family (vs DSPIC33FJ16GS502-I/SP)
Design Notes
Place the DSPIC33FJ16GS504-H/PT close to its PWM outputs and analog comparators, and route PWM traces with controlled impedance and minimum loop area to limit switching noise coupling into sensitive analog inputs. According to Microchip's SMPS DSC layout guidelines, separate analog (AVDD/AVSS) and digital (VDD/VSS) ground planes should join at a single point under the IC's exposed pad or near the VSS pin. Decoupling should include a 100 nF ceramic as close as possible to each VDD pin plus a bulk 10 uF tantalum or ceramic on AVDD.
The four high-speed comparators are designed to connect directly to the PWM generator with sub-microsecond latency. For cycle-by-cycle peak current limiting, the comparator input traces must be kept short and routed away from PWM switching nodes to avoid false tripping. According to Microchip's family datasheet, comparator inputs share pins with the ADC - if both ADC sampling and comparator blanking are used, leverage the PWM leading-edge blanking feature to mask switching noise on current-sense signals.
The "-H" suffix denotes the high-temperature grade (-40C to +150C), not a different silicon revision; the underlying die is identical to the -I industrial grade. Choosing the wrong temperature grade can lead to parametric drift or accelerated aging in thermally demanding applications such as outdoor solar inverters or under-hood automotive converters. According to Microchip ordering information, always verify the temperature grade suffix matches your thermal envelope, since per-unit cost is meaningfully higher for the H grade.
The DSPIC33FJ16GS504-H/PT operates from a single 3.0-3.6 V supply, but most SMPS applications power the IC from an auxiliary winding or linear regulator derived from the converter's output rail. According to the family datasheet, the VDD_CORE pin requires its own 10 uF + 100 nF decoupling network, and the AVDD pin should be tied to VDD through a ferrite bead or filter network to keep switching noise out of the ADC reference. Estimated: at 40 MIPS execution and full peripheral activity, the IC draws ~50 mA from VDD, so the auxiliary supply must source at least 75 mA peak to allow for transient bumps during ADC sampling.
Compliance Information
RoHS compliant and lead-free per Microchip product page and onlinecomponents listing. The H temperature grade supports automotive-style thermal profiles but the part itself is not explicitly AEC-Q100 qualified - contact Microchip for automotive-grade certification status.