DSPIC33EP16GS505-E/PT - 16-Bit 70 MIPS Digital Power DSC | Microchip
MPN: DSPIC33EP16GS505-E/PT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $5.29 | $5.29 |
| 10 | $4.75 | $47.50 |
| 100 | $4.28 | $428.00 |
| 500 | $4.1 | $2,050.00 |
| 1,000 | $3.93 | $3,930.00 |
DSPIC33EP16GS505-E/PT Overview
A digital signal controller combines a microcontroller's peripherals and ease of use with the mathematical throughput of a DSP core. In the power-management hierarchy, the dsPIC33EP16GS505 sits at the control-layer: it closes feedback loops (current-mode, voltage-mode, multi-loop) that analog controllers previously handled, executing compensation algorithms sample-by-sample on the switching waveform.
Key features include a high-speed 12-bit ADC capable of sampling multiple channels at rates matched to the PWM frequency, an on-chip DAC for comparator references, and dedicated SMPS peripherals such as the high-resolution PWM module with nanosecond-scale duty-cycle resolution. The -E/PT suffix denotes the extended temperature grade, and the exposed-pad TQFP improves thermal dissipation for power-conversion layouts.
Architecturally, the dsPIC33EP core is a modified Harvard 16-bit pipeline processor with DSP instructions (MAC, multiply, divide), designed for deterministic loop timing. This lets a single controller run AC-to-DC converter, power-factor-correction, and housekeeping tasks concurrently - a pattern Microchip demonstrates in its interleaved PFC reference design for the GS50x family.
Typical applications include AC-DC converters, digital PFC stages, DC-DC modules, battery chargers, and solar micro-inverters - anywhere multi-loop SMPS control demands both fast analog sampling and algorithmic flexibility.
Design consideration: keep the exposed thermal pad soldered to a ground copper pour, and place ADC inputs away from the PWM switching nodes to preserve the high-speed converter's effective resolution.
This page synthesizes distributor pricing, drop-in alternatives within the same 48-TQFP footprint, design notes, and application guidance not found on any single datasheet or distributor page, verified as of 2026-09-24.
Drop-in alternatives for DSPIC33EP16GS505-E/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 DSPIC33EP16GS505-E/PT (same form factor and footprint) — differing in Package, ADC, Core Architecture, Functional Safety, Maximum CPU Speed.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33EP16GS505-I/PT
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$2.51 / Unit
View Datasheet →DSPIC33EP32GS505-E/PT
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33EP64GS505-E/PT
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$3.45 / Unit
View Datasheet →DSPIC33EP16GS506-E/PT
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$3.46 / Unit
View Datasheet →DSPIC33EP32GS506-E/PT
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$3.5 / Unit
View Datasheet →DSPIC33EP16GS505-E/PT Maximum Ratings & Electrical Characteristics
| Core Architecture | 16-bit dsPIC33EP Digital Signal Controller |
| Maximum CPU Speed | 70 MIPS (60 MIPs listed by DigiKey; 70 MIPS per Microchip product description) |
| Program Memory (Flash) | 16 KB (16K x 8) |
| Target Application | Digital Power / SMPS |
| ADC | High-speed ADC per GS50x datasheet |
| DAC | On-chip DAC for comparator references |
| PWM | High-resolution SMPS PWM peripherals |
| Package | 48-TQFP-EP (7x7 mm) with exposed pad |
| Mounting Type | Surface Mount |
| Temperature Grade | Extended (-E suffix) |
| Status | In Production |
| Functional Safety | FuSa supported (per DigiKey listing) |
DSPIC33EP16GS505-E/PT 48-tqfp-ep (7x7 mm) with exposed pad Pin Configuration Guide
Pin configuration for DSPIC33EP16GS505-E/PT (48-tqfp-ep (7x7 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 DSPIC33EP16GS505-E/PT.
Refer to the datasheet for full pin configuration.
Typical Applications
DSPIC33EP16GS505-E/PT is suitable for 6 applications: AC-DC Digital Power Supplies, Interleaved Power Factor Correction, DC-DC Converter Modules, Solar Micro-Inverters and chargers, LED Drivers and lighting power, UPS and Battery Management.
AC-DC Digital Power Supplies
The DSPIC33EP16GS505-E/PT directly targets AC to DC converter control, one of the headline applications Microchip names for the GS50x family. Its high-speed ADC samples the input and output rails synchronized to the PWM cycle, while the high-resolution PWM module drives the switching stage with the duty-cycle precision needed for tight line and load regulation. Running at up to 70 MIPS, the controller executes current-mode and voltage-mode compensation loops digitally, replacing analog error amplifiers with firmware that can adapt across operating modes. The on-chip DAC supplies programmable comparator thresholds for fast cycle-by-cycle overcurrent protection. The extended -E temperature grade suits the elevated ambient conditions inside power-supply enclosures.
Recommended
Interleaved Power Factor Correction
Microchip provides an interleaved PFC reference design specifically for SMPS dsPIC Digital Signal Controllers, and the GS505 fits this role with its 48-pin TQFP-EP offering enough I/O to drive multiple interleaved phases. Interleaved PFC splits the input current across two or more boost stages switched out of phase, reducing input ripple and EMI filter size; the controller must sample each phase current and compute per-phase duty corrections every switching cycle. The GS505's high-speed ADC and DSP multiply-accumulate instructions handle these computations deterministically at up to 70 MIPS, while high-resolution PWM provides the fine phase offsets and duty resolution the topology demands.
Recommended
DC-DC Converter Modules
For telecom rectifiers, server VRMs, and isolated DC-DC bricks, the GS505 closes digital current-mode loops with cycle-by-cycle sampling. The high-speed ADC reads output current and voltage each switching period, firmware executes the compensation law, and the high-resolution PWM adjusts duty with nanosecond-class granularity - enough for the fast transient response these modules require. The 16KB Flash accommodates loop compensation, state machines, PMBus-style supervision, and fault handling in compact code. The exposed-pad 7x7 mm TQFP sinks heat into the ground pour, and the -E extended temperature rating tolerates the hot spots typical of dense power boards, supporting reliable continuous operation.
Recommended
Solar Micro-Inverters and chargers
Solar micro-inverters combine MPPT (maximum power point tracking), DC-AC inversion, and grid-interaction control - workloads that need both fast sampled control and flexible algorithms, which is precisely the DSC value proposition. The GS505's ADC samples panel voltage/current for the MPPT algorithm while DSP math executes the perturb-and-observe or incremental-conductance search and the inverter modulation. The extended -E grade suits rooftop enclosures that see wide and high ambient temperatures. Battery chargers similarly benefit: multi-stage charge profiles (CC, CV, trickle) are simply firmware state machines, with the DAC/comparator blocks providing hardware overcurrent cutoff independent of software latency.
Recommended
LED Drivers and lighting power
High-power LED drivers need constant-current regulation with dimming control, and the GS505 implements both digitally: the high-resolution PWM sets the switching regulator's duty for precise current, and a second PWM channel provides dimming without analog dimming-path drift. The ADC monitors LED string current and temperature sensors, enabling firmware derating that extends LED lifetime. The 16KB Flash holds the complete driver state machine including fault recovery, and the 48-pin package leaves enough general I/O for DALI/DMX-style interface expansion. The extended temperature grade fits enclosed luminaires where ambient temperatures near the driver electronics commonly exceed industrial limits.
Recommended
UPS and Battery Management
Uninterruptible power supplies and battery management systems require multi-loop control: inverter output regulation, charger current control, and battery-cell monitoring - all running concurrently. The GS505's deterministic 16-bit core executes these loops with predictable timing, while its ADC channels sample battery voltage/current and inverter feedback synchronously with the PWM carriers, avoiding beat-frequency artifacts in the measurements. The on-chip DAC and comparators give hardware-level protection against overcurrent and overvoltage faults faster than any software interrupt. The 48-pin TQFP-EP provides sufficient I/O for front-panel, communication, and relay-driving functions on a single controller.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33EP16GS505-E/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33EP16GS505-I/PT | DSPIC33EP32GS505-E/PT | DSPIC33EP64GS505-E/PT | DSPIC33EP16GS506-E/PT |
|---|---|---|---|---|---|
| Package | 48-TQFP-EP (7x7 mm) | 48-TQFP-EP (7x7 mm) - same | 48-TQFP-EP (7x7 mm) - same | 48-TQFP-EP (7x7 mm) - same | 48-TQFP-EP (7x7 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 16 KB | 16 KB | 32 KB | 64 KB | 16 KB |
| Core / Performance | 16-bit dsPIC33EP, up to 70 MIPS (60 MIPs per DigiKey) | 16-bit dsPIC33EP, same core | 16-bit dsPIC33EP, same core | 16-bit dsPIC33EP, same core | 16-bit dsPIC33EP, same core |
| Temperature Grade | Extended (-E) | Industrial (-I) | Extended (-E) | Extended (-E) | Extended (-E) |
| Target Application | Digital Power SMPS | Digital Power SMPS | Digital Power SMPS | Digital Power SMPS | Digital Power SMPS |
| Key Differentiator | 16KB Flash, extended temp grade | Same die, industrial grade | 2x Flash | 4x Flash | GS506 memory option |
| PCB Redesign Required | - | No - same footprint | No - same footprint | No - same footprint | No - same footprint (verify pin map per datasheet) |
Key Differentiators
- Extended temperature grade for power-enclosure environments (vs DSPIC33EP16GS505-I/PT)
- Lowest-cost entry point in the 48-pin GS505 family (vs DSPIC33EP32GS505-E/PT)
- Dedicated digital-power peripheral set vs general-purpose dsPIC33EP parts (vs DSPIC33EP128GP502-H/SO)
Design Notes
Solder the exposed pad of the 48-TQFP-EP to a solid grounded copper pour. In digital power layouts this pad is not just thermal - it provides the low-inductance ground reference that the high-speed ADC needs for accurate sampling. Estimated: without the pad soldered, junction-to-ambient thermal resistance rises substantially versus the datasheet value, so omitting the pour risks exceeding the junction limit in hot power-supply enclosures.
Keep ADC input traces short and route them away from PWM switching nodes and gate-drive traces. In SMPS layouts, dV/dt from the switching stage couples into high-impedance ADC inputs, corrupting the feedback samples the digital compensation loops depend on. Use a grounded guard trace or ground fill between analog sense lines and PWM routing, and sample synchronously with the PWM carrier to avoid switching-edge pickup.
The -E/PT and -I/PT suffixes denote different temperature grades of the same die - substituting -I for -E saves cost but forfeits extended-temperature margin, a common procurement error in power products. Also note the Flash ceiling: 16KB fills quickly once compensation firmware, state machines, and communications are included. If firmware growth is likely, design in the pin-compatible 32GS505 or 64GS505 from the start rather than respinning the PCB later.
Compliance Information
Compliance statuses not stated in the provided web data; verify on the Microchip product page or distributor compliance documents.
