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Microchip Technology MCP1790T-5002E/DB
- Part No.:
- MCP1790T-5002E/DB
- Manufacturer:
- Microchip Technology
- Package:
- TO-261-4, TO-261AA
- Datasheet:
-
MCP1790T-5002E/DB.pdf
- Description:
- IC REG LINEAR 5V 70MA SOT223-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,262
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Product details
Overview
MCP1790T-5002E/DB from Microchip Technology is a 5.0V fixed-output, 70 mA high-voltage linear regulator designed for automotive and industrial 12/24 VDC systems. It operates continuously from 6.0V to 30.0V input, withstands +48V load dump transients (<500 ms), and delivers ±2.5% output voltage tolerance over −40°C to +125°C junction temperature.
For engineers reviewing the MCP1790T-5002E/DB datasheet, MCP1790T-5002E/DB pinout, MCP1790T-5002E/DB application, or MCP1790T-5002E/DB equivalent, key selection criteria include its 70 µA typical quiescent current, 700 mV typical dropout at 70 mA, thermal shutdown at 157°C, PSRR of −90 dB @ 100 Hz, and compatibility with 4.7 µF ceramic or 1 µF tantalum output capacitors.
Technical Context
The MCP1790T-5002E/DB is a 3-pin CMOS LDO regulator (VIN, GND, VOUT) without SHDN or PWRGD pins-distinct from the 5-pin MCP1791. Its internal architecture includes VIN monitoring, thermal overload protection (157°C trip, 20°C hysteresis), short-circuit foldback (105 mA typical at 5.0V), and line regulation of ±0.0002%/V.
It implements low-ground-current design (110 µA typical at 70 mA load) and stable operation across ceramic, tantalum, and electrolytic capacitors-enabling robust power delivery in fire alarm panels, automotive accessory adapters, and microcontroller supply rails where transient immunity and wide temperature range are mandatory.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0V ±2.5% over −40°C to +125°C - ensures stable MCU core or sensor bias under automotive thermal cycling. |
| Max Output Current | 70 mA at +125°C junction - supports multiple low-power peripherals without derating in engine bay environments. |
| Input Voltage Range | 6.0V–30.0V continuous, 48V absolute max - compatible with 12/24 VDC systems and survives FORD Pulse G load dump. |
| Quiescent Current | 70 µA typical at no load - enables always-on functionality in battery-backed fire alarms with minimal standby drain. |
| Dropout Voltage | 700 mV typical at 70 mA - allows regulation down to VIN = 5.7V, critical for brownout resilience in 6V-start automotive scenarios. |
| PSRR | −90 dB @ 100 Hz - suppresses alternator ripple and switching noise before sensitive analog or RF subsystems. |
| Thermal Shutdown | 157°C typical trip, 20°C hysteresis - prevents permanent damage during sustained overload or poor heatsinking. |
Pinout & Package
Package: SOT-223-3 (3-lead, exposed tab grounded). Pinout validated per DS22075B-page 2 and Table 3-1: Pin 1 = VIN, Pin 2 (tab) = GND, Pin 3 = VOUT. Exposed tab is electrically connected to GND and serves as primary thermal path.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Unregulated input supply | Accepts 6–30V DC; must withstand 48V transients; requires ≥1 µF input capacitance for stability and EMI filtering. |
| GND (Tab) | Ground reference and thermal sink | Low-impedance return path for bias current only; exposed tab must be soldered to PCB copper pour for thermal management. |
| VOUT | Regulated 5.0V output | Supplies downstream logic; requires ≥4.7 µF ceramic or ≥1 µF tantalum capacitor placed adjacent to pin for loop stability. |
Key Features
| Feature | Design Value |
|---|---|
| Load dump survival | Withstands +48V (43.5V ±10%) transients <500 ms at 30 s repetition - eliminates need for external TVS in basic automotive modules. |
| Ceramic capacitor stability | Stable with 4.7 µF–1000 µF X7R/X5R ceramics - reduces board space vs. tantalum and avoids aging-related drift. |
| Low ground current | 110 µA typical at full 70 mA load - lowers total system power loss compared to bipolar regulators in multi-node detector networks. |
| Line regulation precision | ±0.0002%/V - maintains tight output accuracy across wide input range, critical for ADC reference or precision sensor biasing. |
| Short-circuit foldback | 105 mA foldback threshold at 5.0V - limits fault current during wiring shorts while enabling self-recovery without latch-up. |
Applications
| Fire Alarm Panel Power | Automotive Accessory Adapter |
|---|---|
Use Scenario: Centralized 24VDC fire alarm control panel powering dozens of smoke/CO detectors across commercial buildings. IC Role / Device Role / Timing Role: Primary 5.0V local regulator for microcontroller, RS-485 transceivers, and LED drivers on each detector node. Use Value: 70 µA quiescent current minimizes cumulative standby drain; ±2.5% output tolerance ensures reliable brownout detection across hundreds of units. | Use Scenario: Aftermarket OBD-II adapter converting vehicle 12V battery to regulated 5.0V for USB-powered diagnostic tools. IC Role / Device Role / Timing Role: Input-stage LDO providing clean, transient-hardened 5.0V rail upstream of USB controller IC. Use Value: 48V load dump immunity eliminates need for external clamping; 70 mA output supports dual-port USB charging at low ambient temperatures. |
| Engine Control Module Sensor Bias | Industrial Thermostat Controller |
Use Scenario: Under-hood engine control module supplying bias to pressure, temperature, and knock sensors. IC Role / Device Role / Timing Role: Local 5.0V regulator for analog front-end circuitry and CAN transceiver logic supply. Use Value: −40°C to +125°C operation ensures reliability at peak under-hood temperatures; −90 dB PSRR rejects alternator noise affecting sensor measurements. | Use Scenario: Programmable HVAC thermostat using 24VAC building supply rectified to ~32VDC intermediate rail. IC Role / Device Role / Timing Role: Final-stage 5.0V regulator for display driver, wireless SoC, and touch controller. Use Value: Stable operation with 1 µF tantalum output capacitor simplifies BOM; 30V max input accommodates rectifier ripple peaks without derating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NCP163AMX500TBG | 5.0V fixed, 250 mA output, 1.1V dropout @ 250 mA, 50 µA IQ, SOT-23-5 package | Higher current and lower dropout, but lacks 48V load dump rating and −40°C to +125°C guaranteed operation | Select when >70 mA load or ultra-low dropout is required, and transient immunity is handled externally. |
| TPS7B6750QDGNRQ1 | 5.0V fixed, 150 mA, AEC-Q100 qualified, 45V abs max, 25 µA IQ, thermal foldback, SOIC-8 | Automotive-qualified with higher current and lower IQ, but larger SOIC-8 footprint and higher cost | Select for new AEC-Q100-compliant designs requiring extended reliability validation and higher drive capability. |
Compared with NCP163AMX500TBG and TPS7B6750QDGNRQ1, the MCP1790T-5002E/DB offers optimal balance of load dump immunity, wide temperature range, and SOT-223 thermal performance for cost-sensitive automotive and fire safety applications where 70 mA is sufficient.
Availability
MCP1790T-5002E/DB is available at Aetrix Electronics and suitable for automotive accessory adapters, fire alarm detector nodes, and industrial thermostat controllers requiring stable component supply across extended temperature and transient conditions.
Supply support for MCP1790T-5002E/DB 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 Inc. is a leading provider of microcontrollers, analog devices, and timing solutions, headquartered in Chandler, Arizona.
The MCP1790/MCP1791 product line was engineered specifically for harsh-environment power regulation in automotive and commercial fire safety systems, emphasizing transient survivability, low quiescent current, and extended temperature operation.
FAQ
What is the maximum input voltage rating for the MCP1790T-5002E/DB?
The MCP1790T-5002E/DB has an absolute maximum input voltage of +48.0V, with continuous operation rated from 6.0V to 30.0V. It is specifically designed to survive FORD Test Pulse G load dump transients (43.5V ±10%) lasting less than 500 ms at a 30-second repetition rate-making it suitable for 12V and 24V automotive electrical systems without external transient suppression in many cases.
Does the MCP1790T-5002E/DB include a shutdown pin?
No, the MCP1790T-5002E/DB is the 3-pin variant (VIN, GND, VOUT) and does not include a shutdown (SHDN) input or power good (PWRGD) output. Those features are exclusive to the 5-pin MCP1791 family. The MCP1790T-5002E/DB relies solely on input voltage monitoring for enable/disable behavior and enters low-current state only during undervoltage lockout or thermal shutdown.
What output capacitor types and values are supported by the MCP1790T-5002E/DB?
The MCP1790T-5002E/DB is stable with 1.0 µF to 1000 µF tantalum or aluminum electrolytic capacitors, and 4.7 µF to 1000 µF ceramic capacitors (X7R/X5R dielectrics recommended). A 1 µF ceramic capacitor may be used only if a 0.3 Ω series resistor is added to compensate for low ESR-induced instability. Minimum ESR must not exceed 3 Ω.
What is the thermal shutdown behavior of the MCP1790T-5002E/DB?
The MCP1790T-5002E/DB activates thermal shutdown at a typical junction temperature of 157°C and recovers when the junction cools to approximately 137°C (20°C hysteresis). During shutdown, output is disabled and quiescent current drops to ≤10 µA. Recovery is automatic and does not require power cycle-enabling safe self-protection during sustained overload or inadequate heatsinking in confined enclosures.
Is the MCP1790T-5002E/DB qualified for automotive applications?
Yes, the MCP1790T-5002E/DB is explicitly designed for automotive use: it meets FORD Load Dump Pulse G requirements, operates across −40°C to +125°C junction temperature, incorporates short-circuit foldback and thermal shutdown, and targets applications including automotive accessory power adapters and engine control module sensor bias. While not AEC-Q100 certified itself, its specifications align with functional requirements of automotive Grade 2 systems.
MCP1790T-5002E/DB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- TO-261-4, TO-261AA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 30V
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 1.3V @ 70mA
- Current - Output:
- 70mA
- Current - Quiescent (Iq):
- 130 µA
- Current - Supply (Max):
- 210 µA
- PSRR:
- 90dB ~ 75dB (100Hz ~ 1kHz)
- Control Features:
- -
- Protection Features:
- Over Temperature, Short Circuit
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-223-3
MCP1790T-5002E/DB FAQ
1.How can I place an order for MCP1790T-5002E/DB through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP1790T-5002E/DB 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 MCP1790T-5002E/DB reliable?
The price and inventory of MCP1790T-5002E/DB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MCP1790T-5002E/DB is usually 5 days.
3.What payment methods are accepted for MCP1790T-5002E/DB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP1790T-5002E/DB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP1790T-5002E/DB?
MCP1790T-5002E/DB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP1790T-5002E/DB 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 MCP1790T-5002E/DB?
For technical support, including MCP1790T-5002E/DB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP1790T-5002E/DB requirements.
6.How does Aetrix verify that MCP1790T-5002E/DB is sourced from the original manufacturer or authorized distributors?
All MCP1790T-5002E/DB 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 MCP1790T-5002E/DB meets industry standards.
7.What is the process for return or replacement of MCP1790T-5002E/DB?
All MCP1790T-5002E/DB units undergo pre-shipment inspection (PSI). If there is an issue with MCP1790T-5002E/DB, 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 MCP1790T-5002E/DB part is unused and in its original packaging.
Return procedure for MCP1790T-5002E/DB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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