My Inquiry
My Account
Microchip Technology MCP1664T-E/MNY
- Part No.:
- MCP1664T-E/MNY
- Manufacturer:
- Microchip Technology
- Category:
- LED Drivers
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
MCP1664T-E/MNY.pdf
- Description:
- IC LED DRV RGLTR PWM 300MA 8TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:208
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MCP1664T-E/MNY from Microchip Technology is a fixed-frequency, non-synchronous step-up DC-DC converter optimized for constant-current LED driving in portable battery-powered systems. It integrates a 36V, 400 mΩ low-side NMOS switch, delivers up to 300 mA LED current at 5.0V input with four white LEDs, operates from 2.4V–5.5V input, features 500 kHz PWM switching, and includes open-load protection (OLP) and AEC-Q100 qualification for automotive lighting.
For engineers reviewing the MCP1664T-E/MNY datasheet, MCP1664T-E/MNY pinout, MCP1664T-E/MNY application, or MCP1664T-E/MNY equivalent, this page provides verified technical context, real-world design meaning of key specs, validated pin functions per package variant, and two confirmed alternative parts with documented functional and application-level differences.
Technical Context
The MCP1664T-E/MNY implements peak current-mode control with internal slope compensation, using a 300 mV feedback reference to minimize RSET power loss. Its 1.8A cycle-by-cycle inductor peak current limit protects the integrated switch while enabling precise LED current regulation across varying input voltages and LED string configurations.
UVLO thresholds (2.3V rising, 1.85V falling) prevent operation with depleted alkaline/NiMH cells; OLP disables switching when VFB drops below 50 mV-indicating LED disconnection or VFB-to-GND short-thereby limiting SW node voltage to ≤32V and preventing overvoltage damage to the IC or external diode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.4V to 5.5V - supports two/three-cell alkaline/NiMH and single-cell Li-ion batteries without external LDO pre-regulation. |
| Switching Frequency | 500 kHz ±15% - enables compact magnetics (4.7–10 µH) and reduces output ripple without requiring high-frequency EMI filtering. |
| Feedback Reference Voltage | 300 mV ±25 mV - sets LED current via single RSET resistor; enables <30 mW dissipation at 100 mA, improving system efficiency. |
| Peak Switch Current Limit | 1.8A typical - constrains inductor size and thermal stress during startup or transient overload; defines max ILED vs. VIN/LED count trade-offs. |
| UVLO Thresholds | 2.3V (rising), 1.85V (falling) - prevents erratic operation with weak batteries while providing 450 mV hysteresis to reject noise-induced restarts. |
| Shutdown Quiescent Current | 40 nA typical - extends battery life in standby mode; allows >1-year shelf life in low-power portable devices. |
| Max Output Voltage | 32V - supports up to 10 white LEDs (VF ≈ 3.2V) in series; limits SW node stress and external diode voltage rating requirements. |
Pinout & Package
Package: 8-Lead 2 mm × 3 mm TDFN with exposed thermal pad (EP). Thermal resistance θJA = 52.5°C/W enables stable operation at +125°C ambient in compact layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW | Switch Node | Connects to boost inductor; carries full inductor current; must be routed with minimal loop area to reduce EMI and voltage spikes. |
| VIN | Power Supply Input | Accepts 2.4–5.5V; requires ≥4.7 µF ceramic decoupling close to pin to suppress input transients and maintain stability. |
| VFB | Feedback Voltage Input | Senses voltage across RSET; regulates LED current to 300 mV; OLP triggers if voltage falls below 50 mV. |
| EN | Enable Control Input | Logic-high (>85% VIN) enables switching; logic-low (<7.5% VIN) enters shutdown; used for PWM dimming. |
| PGND | Power Ground | High-current return path for NMOS switch; must be connected externally to SGND at single point to avoid ground bounce. |
| SGND | Signal Ground | Reference for error amplifier and bandgap; separates noise-sensitive analog circuitry from power switching paths. |
| NC | Not Connected | Pins 4 and 6 are unconnected; must remain floating or tied to GND per PCB layout best practices (no internal connection). |
| EP | Exposed Thermal Pad | Electrically isolated; must be soldered to large GND copper pour for thermal conduction; improves θJA by >60% vs. SOT-23. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 36V, 400 mΩ NMOS switch | Eliminates external MOSFET and gate driver; reduces BOM count and board space while maintaining ≤32V output capability. |
| Open Load Protection (OLP) | Disables switching within microseconds if VFB < 50 mV-prevents SW overvoltage and external diode failure during LED open-circuit faults. |
| Internal compensation network | Enables stable operation with only RSET and standard ceramic input/output capacitors; no external compensation components required. |
| AEC-Q100 qualified | Validated for automotive ambient temperature range (−40°C to +125°C) and reliability testing-supports instrument cluster, interior lighting, and camera flash applications. |
| 500 kHz fixed-frequency PWM | Provides predictable EMI profile and simplifies filter design; avoids audible noise in portable lighting while enabling small inductors. |
Applications
| Automotive Interior Lighting | Portable Medical Device Backlight |
|---|---|
Use Scenario: Driving 6–8 white LEDs in dashboard illumination or door courtesy lights powered by 12V rail with local 3.3V/5V LDO or directly from Li-ion pack. IC Role / Device Role / Timing Role: Constant-current boost controller regulating LED brightness independent of input voltage sag or LED VF drift. Use Value: AEC-Q100 qualification ensures reliability over vehicle lifetime; OLP prevents fault propagation during LED wire harness disconnects. |
Use Scenario: Powering high-brightness LCD backlight in handheld ultrasound or glucose meters using single-cell Li-ion (3.0–4.2V). IC Role / Device Role / Timing Role: Step-up current source delivering stable 200 mA to 4-white-LED string with minimal quiescent current in sleep mode. Use Value: 40 nA shutdown current extends battery runtime; 300 mV VFB reference minimizes RSET heat generation in sealed enclosures. |
| Camera Flash for Smartphones | Industrial Handheld Scanner |
Use Scenario: Delivering short-duration, high-current pulses (up to 300 mA) to white LED flash array during image capture. IC Role / Device Role / Timing Role: Fast-starting boost regulator controlled via EN pin PWM for precise flash intensity and duration. Use Value: 100 µs start-up time enables sub-millisecond flash response; internal current limiting prevents LED thermal runaway during burst mode. |
Use Scenario: Driving 3–5 white LEDs in barcode scanner illumination module powered by dual AA alkaline cells (2.4–3.0V). IC Role / Device Role / Timing Role: Efficient LED driver maintaining consistent brightness as battery voltage declines from 3.0V to 2.4V. Use Value: UVLO hysteresis (2.3V/1.85V) avoids flicker near end-of-life; 92% peak efficiency sustains runtime across full battery discharge curve. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS61061DRVR | Higher 600 kHz switching frequency; lower 2.7V min input; no integrated OLP; 2.5V feedback reference. | Lacks open-load protection; requires external fault handling; better suited for cost-sensitive consumer flash where OLP is not mandated. | Select when higher switching frequency justifies added complexity and OLP is not required for system safety compliance. |
| LT3466EDD-1#TRPBF | Higher 40V switch rating; 1.25A peak current limit; external compensation; no AEC-Q100 qualification. | Requires external RC compensation network; wider VIN range (2.7–16V); intended for industrial, not automotive, environments. | Choose for designs needing >32V output or operation above 5.5V input; avoid for automotive due to lack of AEC-Q100 validation. |
Compared with TPS61061DRVR and LT3466EDD-1#TRPBF, the MCP1664T-E/MNY uniquely combines AEC-Q100 qualification, integrated OLP, and 300 mV VFB reference in an 8-lead TDFN package-making it the only option among the three qualified for automotive interior lighting where fault tolerance and low RSET power loss are mandatory.
Availability
MCP1664T-E/MNY is available at Aetrix Electronics and suitable for automotive interior lighting, portable medical device backlighting, smartphone camera flash, industrial handheld scanners, and battery-powered LED flashlight applications requiring stable component supply across extended production lifecycles.
Supply support for MCP1664T-E/MNY includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Microchip Technology is a global semiconductor company specializing in microcontrollers, analog devices, FPGAs, and timing solutions, with emphasis on embedded control and power management ICs.
The MCP1664 product line was designed specifically for high-efficiency, constant-current LED driving in space-constrained, battery-powered systems-prioritizing low quiescent current, integrated protection, and automotive-grade reliability.
FAQ
What is the maximum number of white LEDs the MCP1664T-E/MNY can drive in series?
The MCP1664T-E/MNY supports up to 10 white LEDs in series, limited by its 32V maximum output voltage and typical forward voltage of ~3.2V per LED at rated current. At 4.2V input and 8 LEDs, it delivers 150 mA; at 5.0V input and 4 LEDs, it delivers 300 mA. The actual count depends on LED VF variation, ambient temperature, and RSET selection per Equation 5-2 in the datasheet.
Does the MCP1664T-E/MNY require external compensation components?
No, the MCP1664T-E/MNY includes fully integrated compensation circuitry. Only RSET (for LED current setting), input capacitor (4.7–30 µF), output capacitor (10 µF), and boost inductor (4.7–10 µH) are required. This eliminates tuning effort and reduces bill-of-materials cost compared to controllers requiring external Type-II or Type-III compensation networks.
How does Open Load Protection (OLP) function in the MCP1664T-E/MNY?
OLP monitors the VFB pin voltage continuously. If VFB drops below 50 mV-indicating either LED string disconnection or VFB shorted to GND-the MCP1664T-E/MNY immediately disables PWM switching. This prevents SW node overvoltage, protects the external Schottky diode, and avoids excessive current into open-circuit LEDs. OLP is disabled during startup and thermal shutdown to avoid false triggering.
Can the MCP1664T-E/MNY be used with lithium iron phosphate (LiFePO₄) batteries?
Yes, the MCP1664T-E/MNY supports input voltages from 2.4V to 5.5V, matching the nominal 3.2V and fully charged 3.65V of single-cell LiFePO₄ batteries. Its UVLO thresholds (2.3V rising, 1.85V falling) align with LiFePO₄ discharge curves, ensuring reliable operation down to ~2.5V while avoiding deep discharge damage to the cell.
What is the thermal performance difference between the SOT-23 and TDFN packages of the MCP1664?
The MCP1664T-E/MNY uses the 8-lead 2 mm × 3 mm TDFN package, which has a junction-to-ambient thermal resistance (θJA) of 52.5°C/W-significantly lower than the 5-lead SOT-23's 201.0°C/W. This allows the TDFN version to sustain higher continuous LED current (e.g., 300 mA at 5V) at +125°C ambient without thermal shutdown, whereas the SOT-23 would require derating or forced airflow.
MCP1664T-E/MNY Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- DC DC Regulator
- Topology:
- Step-Up (Boost)
- Internal Switch(s):
- Yes
- Number of Outputs:
- 1
- Voltage - Supply (Min):
- 2.4V
- Voltage - Supply (Max):
- 5.5V
- Voltage - Output:
- 32V
- Current - Output / Channel:
- 300mA
- Frequency:
- 500kHz
- Dimming:
- PWM
- Applications:
- Backlight, Camera Flash
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TDFN (2x3)
MCP1664T-E/MNY FAQ
1.How can I place an order for MCP1664T-E/MNY through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP1664T-E/MNY on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MCP1664T-E/MNY reliable?
The price and inventory of MCP1664T-E/MNY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MCP1664T-E/MNY is usually 5 days.
3.What payment methods are accepted for MCP1664T-E/MNY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP1664T-E/MNY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP1664T-E/MNY?
MCP1664T-E/MNY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP1664T-E/MNY order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MCP1664T-E/MNY?
For technical support, including MCP1664T-E/MNY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP1664T-E/MNY requirements.
6.How does Aetrix verify that MCP1664T-E/MNY is sourced from the original manufacturer or authorized distributors?
All MCP1664T-E/MNY products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MCP1664T-E/MNY meets industry standards.
7.What is the process for return or replacement of MCP1664T-E/MNY?
All MCP1664T-E/MNY units undergo pre-shipment inspection (PSI). If there is an issue with MCP1664T-E/MNY, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MCP1664T-E/MNY part is unused and in its original packaging.
Return procedure for MCP1664T-E/MNY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MCP1664T-E/MNY Tags
-
BCR402RE6327HTSA1
Infineon Technologies
-
BCR430UXTSA2
Infineon Technologies
-
BCR420UE6433HTMA1
Infineon Technologies
-
BCR420UE6327HTSA1
Infineon Technologies
-
BCR421UE6327HTSA1
Infineon Technologies
-
LYT1604D-TL
Power Integrations
-
HV9910CLG-G
Microchip Technology
-
CL2N8-G
Microchip Technology
-
BCR420UW6-7
Diodes Incorporated
-
BCR421UW6-7
Diodes Incorporated
-
BCR420UFD-7
Diodes Incorporated
-
BCR421UFD-7
Diodes Incorporated
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
