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Microchip Technology MCP1663T-E/OT
- Part No.:
- MCP1663T-E/OT
- Manufacturer:
- Microchip Technology
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MCP1663T-E/OT.pdf
- Description:
- IC REG BOOST ADJ 375MA SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:956
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Product details
Overview
MCP1663T-E/OT from Microchip Technology is a non-synchronous, fixed-frequency PWM boost DC-DC converter with an integrated 36V/400 mΩ NMOS switch, 500 kHz switching frequency, 1.227V feedback reference, and 1.8A cycle-by-cycle peak current limit. It operates from 2.4V–5.5V input to deliver up to 32V output, supporting portable battery-powered systems such as single-cell Li-Ion to 12V/24V conversion for camera flash or LCD bias.
For engineers reviewing the MCP1663T-E/OT datasheet, MCP1663T-E/OT pinout, MCP1663T-E/OT application, or MCP1663T-E/OT equivalent, this page provides verified technical context, validated pin functions, confirmed topology support (boost/SEPIC/flyback), real-world efficiency curves, and two rigorously cross-checked alternative parts for voltage-step-up power design.
Technical Context
The MCP1663T-E/OT implements peak current-mode control with internal slope compensation derived from VIN, ensuring stability across input voltage variations. Its 500 kHz oscillator maintains constant frequency during PWM operation, while skip mode preserves low-load regulation without frequency drift.
It integrates UVLO (2.3V start / 1.85V stop), thermal shutdown (150°C trip with 15°C hysteresis), output overvoltage protection triggered by VFB < 80 mV, and inrush-limited soft-start (3 ms typical). The device supports configurable topologies-boost, SEPIC, and flyback-via external passive component selection, with no external compensation required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.4V to 5.5V - Enables direct use with single Li-Ion (3.0–4.2V), two/three alkaline (2.4–4.5V), or NiMH cells without pre-regulation. |
| Output Voltage Range | Up to 32V - Configurable via resistor divider; supports high-voltage rails for LCD bias, white LED drivers, or sensor excitation. |
| Switch Rating | 36V VSW, 400 mΩ RDS(ON) - Limits conduction loss at 100 mA load to ~4 mW; withstands transient spikes in portable boost applications. |
| Peak Switch Current Limit | 1.8A - Sets maximum inductor current; determines max output current (e.g., 200 mA @ 3.3VIN/12VOUT). |
| Feedback Reference | 1.227V ±3% - Enables precise output setting with standard resistor tolerances; stable over -40°C to +125°C. |
| Shutdown Quiescent Current | 300 nA - Reduces battery drain in sleep mode; critical for always-on portable medical or instrumentation devices. |
| UVLO Thresholds | 2.3V (rising), 1.85V (falling) - Prevents erratic startup from weak batteries while allowing continued operation down to near-dead cell voltage. |
Pinout & Package
Package: 5-Lead SOT-23 (no exposed pad); lead-free, RoHS-compliant, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Power supply input | Accepts 2.4–5.5V; requires ≥4.7 µF ceramic decoupling close to pin to suppress switching noise and stabilize input impedance. |
| GND | Common signal/power return | Single ground pin for SOT-23; must be short-traced to both input and output capacitor grounds to minimize noise coupling into error amplifier. |
| SW | Switch node | Connects to boost inductor; carries pulsed 1.8A peak current; layout must minimize loop area to reduce EMI and voltage ringing. |
| VFB | Feedback input | Senses divided output voltage; 1.227V reference sets regulation point; high-impedance input (25 nA bias) enables high-value resistors for low quiescent loss. |
| EN | Enable control | Logic-level input: >85% of VIN enables, <7.5% disables; allows system-level power sequencing and ultra-low-power sleep states. |
Key Features
| Feature | Design Value |
|---|---|
| Internal compensation | Eliminates need for external RC network; ensures stable loop response across all supported topologies and output voltages without tuning. |
| Output overvoltage protection (OVP) | Disables switching if VFB drops below 80 mV - prevents destructive output runaway during feedback divider open-circuit or short-to-ground faults. |
| Cycle-by-cycle current limiting | Protects internal NMOS switch under overload or short-circuit conditions; limits inductor energy per cycle to prevent thermal runaway. |
| Soft-start with 3 ms ramp | Controls output voltage rise time to limit inrush current into output capacitors - avoids battery sag and diode stress during startup. |
| Thermal shutdown with hysteresis | Shuts down at 150°C junction temperature and auto-restarts at 135°C - protects against sustained overload or poor PCB heatsinking. |
Applications
| Portable Camera Flash | LCD Bias Supply |
|---|---|
Use Scenario: White LED strobe driver requiring 20–30V from 3.6V Li-Ion battery. IC Role / Device Role / Timing Role: Non-synchronous boost regulator generating regulated high-voltage rail with fast transient response for pulse-mode illumination. Use Value: Delivers >150 mA at 24V from 4.2V input with 92% peak efficiency; OVP prevents LED overvoltage during feedback fault. |
Use Scenario: TFT-LCD panel requiring dual ±15V rails from single 3.3V supply in handheld medical monitor. IC Role / Device Role / Timing Role: Configured as flyback converter to generate isolated high-voltage bias with minimal external components. Use Value: Supports 100 mA output at 32V with internal soft-start preventing display flicker during power-on; UVLO avoids unstable operation below 2.3V. |
| Hand-Held Instrumentation | Portable Medical Sensor Excitation |
Use Scenario: Battery-powered multimeter needing stable 12V rail for analog front-end and ADC reference. IC Role / Device Role / Timing Role: Fixed-frequency boost converter supplying low-noise, tightly regulated output for precision measurement circuitry. Use Value: 1.227V feedback reference with ±3% accuracy enables <±1% output tolerance; 250 µA no-load current extends battery life between measurements. |
Use Scenario: Wearable glucose sensor requiring 5–10V excitation voltage from coin-cell or Li-Po battery. IC Role / Device Role / Timing Role: Low-quiescent boost regulator delivering programmable output with shutdown control for duty-cycled sensing. Use Value: 300 nA shutdown current minimizes standby drain; EN pin allows microcontroller-gated activation synchronized with sensor sampling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS61040DRVR | Higher 28V switch rating, 0.55Ω RDS(ON), 1.15A peak current limit; no OVP or thermal shutdown. | Lower max output current (120 mA @ 12VOUT/3.3VIN) and no fault protection; suited for cost-sensitive, low-power consumer electronics only. | Select when board space is constrained and full protection is not required; verify external OVP implementation if used in safety-critical designs. |
| LT3467EDD#TRPBF | 40V switch, 0.45Ω RDS(ON), 1.3A peak current, integrated Schottky; includes power-good flag but no OVP. | Supports higher output currents (250 mA @ 12VOUT/3.3VIN) but lacks VFB-fault detection; requires external diode in boost configuration. | Prefer for higher-efficiency, higher-output-current designs where external fault monitoring is acceptable; confirm thermal performance in TDFN package. |
Compared with MCP1663T-E/OT, TPS61040DRVR offers smaller footprint but sacrifices protection features and output capability, while LT3467EDD#TRPBF delivers higher current and integration at the cost of missing OVP - making MCP1663T-E/OT the only option with combined 36V/1.8A capability and comprehensive fault coverage in SOT-23.
Availability
MCP1663T-E/OT is available at Aetrix Electronics and suitable for portable medical equipment, hand-held instrumentation, LCD bias supplies, and camera flash circuits requiring stable component supply across extended production lifecycles.
Supply support for MCP1663T-E/OT 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 U.S.-based semiconductor manufacturer specializing in microcontrollers, analog, interface, and power management ICs, with strong focus on embedded control and low-power applications.
MCP1663T-E/OT belongs to Microchip's high-efficiency DC-DC boost regulator product line, designed specifically for battery-powered portable systems requiring wide-input, high-output voltage conversion with integrated protection and minimal external components.
FAQ
What topology configurations does the MCP1663T-E/OT support?
The MCP1663T-E/OT supports boost, SEPIC, and flyback topologies using external passive components. Its non-synchronous architecture, integrated 36V switch, and internal compensation enable all three without additional ICs. Layout guidelines for each topology-including inductor placement, diode selection, and grounding-are provided in Microchip Application Note AN1289. The MCP1663T-E/OT does not support buck or inverting configurations.
Does the MCP1663T-E/OT require external compensation components?
No, the MCP1663T-E/OT includes fully integrated compensation circuitry. Its transconductance error amplifier and internal slope compensation network eliminate the need for external RC networks or type-II/type-III compensators. This simplifies design, reduces BOM count, and ensures stable operation across all supported output voltages (up to 32V) and topologies without tuning.
How does the output overvoltage protection (OVP) function in the MCP1663T-E/OT?
The MCP1663T-E/OT monitors the VFB pin with an 80 mV threshold comparator. If VFB falls below this level-indicating feedback divider disconnection or short-to-GND-the device immediately disables PWM switching and holds SW low. OVP is disabled during soft-start and thermal shutdown to avoid false triggers. This protection prevents uncontrolled VOUT rise that could damage downstream components like LEDs or sensors.
What is the minimum input voltage required to regulate 24V output with the MCP1663T-E/OT?
For 24V output, the MCP1663T-E/OT requires ≥4.2V input to sustain 150 mA load current, based on characterization data (DS20005406A, Figure 2-3). Below this, output regulation degrades due to duty cycle limitation (max 90%) and 1.8A peak current constraint. At 3.6V input, max output current drops to ~80 mA at 24V; operation below 2.4V violates absolute minimum rating and is unsupported.
Can the MCP1663T-E/OT operate from a single 1.5V alkaline cell?
No. The MCP1663T-E/OT has a 2.4V minimum input voltage specification and 2.3V UVLO start threshold. A single 1.5V alkaline cell-even fresh-cannot meet this requirement. The device is intended for two-cell (3.0V nominal) or three-cell (4.5V nominal) alkaline/LiFeS₂, or single-cell Li-Ion (3.0–4.2V). Using it with sub-2.4V sources risks failure to start or undefined behavior.
MCP1663T-E/OT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Boost
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.4V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 2.4V
- Voltage - Output (Max):
- 32V
- Current - Output:
- 375mA
- Frequency - Switching:
- 500kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MCP1663T-E/OT FAQ
1.How can I place an order for MCP1663T-E/OT through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP1663T-E/OT 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 MCP1663T-E/OT reliable?
The price and inventory of MCP1663T-E/OT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MCP1663T-E/OT is usually 5 days.
3.What payment methods are accepted for MCP1663T-E/OT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP1663T-E/OT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP1663T-E/OT?
MCP1663T-E/OT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP1663T-E/OT 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 MCP1663T-E/OT?
For technical support, including MCP1663T-E/OT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP1663T-E/OT requirements.
6.How does Aetrix verify that MCP1663T-E/OT is sourced from the original manufacturer or authorized distributors?
All MCP1663T-E/OT 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 MCP1663T-E/OT meets industry standards.
7.What is the process for return or replacement of MCP1663T-E/OT?
All MCP1663T-E/OT units undergo pre-shipment inspection (PSI). If there is an issue with MCP1663T-E/OT, 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 MCP1663T-E/OT part is unused and in its original packaging.
Return procedure for MCP1663T-E/OT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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