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Microchip Technology MCP1253T-33X50E/MSVAO
- Part No.:
- MCP1253T-33X50E/MSVAO
- Manufacturer:
- Microchip Technology
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MCP1253T-33X50E/MSVAO.pdf
- Description:
- IC REG BUCK BOOST 3.3V/5V 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,172
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Product details
Overview
MCP1253T-33X50E/MSVAO from Microchip Technology is a low-noise, inductorless, positive-regulated charge pump DC/DC converter with selectable 3.3V or 5.0V fixed output, 1 MHz switching frequency, ±2.5% output voltage accuracy, and 120 mA output current capability. It operates from 2.0V to 5.5V input, features thermal shutdown and short-circuit protection, and targets space-constrained, battery-powered applications requiring buck/boost conversion without inductors.
For engineers reviewing the MCP1253T-33X50E/MSVAO datasheet, MCP1253T-33X50E/MSVAO pinout, MCP1253T-33X50E/MSVAO application, or MCP1253T-33X50E/MSVAO equivalent, key selection criteria include its 1 MHz operation enabling smaller external capacitors, extended temperature range (–40°C to +125°C), PGOOD monitoring, and MSOP-8 package compatibility with high-density PCB layouts.
Technical Context
The MCP1253T-33X50E/MSVAO uses a hysteretic bang-bang switched-capacitor architecture to automatically alternate between buck and boost modes based on VIN relative to VOUT, eliminating need for inductors. Its internal 1 MHz oscillator enables use of 1 µF flying capacitor and reduces output ripple to 45 mVp-p at full load.
Regulation is achieved via internal reference (1.21 V) and comparator-based control of C+ and C− charge transfer phases. The SELECT pin configures output voltage (VIN → 3.3V; GND → 5.0V), while PGOOD provides open-drain fault indication with 7% undervoltage threshold and 4% hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 1 MHz - Enables use of smaller 1 µF flying capacitor and reduces board area vs. 650 kHz MCP1252. |
| Output Voltage Options | 3.3V or 5.0V selectable via SELECT pin - No external feedback resistors required; simplifies BOM and layout. |
| Output Accuracy | ±2.5% over full temperature and load range - Ensures stable bias for white LED strings and flash memory supplies. |
| Max Output Current | 120 mA at VIN ≥ 3.0V - Sufficient to drive six white LEDs or power SIM/GSM interface circuitry. |
| Quiescent Current | 60 µA typical - Minimizes battery drain in always-on portable devices. |
| Shutdown Current | 0.1 µA typical - Enables ultra-low-power sleep states in handheld electronics. |
| Operating Temp Range | –40°C to +125°C (Extended) - Qualified for under-hood automotive and industrial environments. |
Pinout & Package
Package: 8-Lead MSOP (Plastic Micro Small Outline), 3.0 mm × 3.0 mm body, 0.65 mm pitch, exposed pad optional per Microchip drawing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - PGOOD | Open-drain power-good flag | Asserts low when VOUT falls below 93% nominal; requires external pull-up for logic-level signaling. |
| 2 - VOUT | Regulated output voltage node | Must be bypassed with ≥10 µF ceramic capacitor; delivers up to 120 mA with <45 mVp-p ripple. |
| 3 - VIN | Main power supply input | Accepts 2.0V–5.5V; requires local 10 µF ceramic decoupling to suppress switching noise. |
| 4 - GND | Ground reference terminal | Low-impedance connection to PCB ground plane essential for EMI control and thermal performance. |
| 5 - C− | Flying capacitor negative terminal | Connects to negative side of 1 µF low-ESR ceramic flying capacitor; polarity critical if using tantalum. |
| 6 - C+ | Flying capacitor positive terminal | Connects to positive side of 1 µF flying capacitor; forms charge-transfer path with C− during phase 1. |
| 7 - SHDN | Active-low shutdown control | Logic-low disables all switching; compatible with 1.8V CMOS logic; draws only 0.1 µA in shutdown. |
| 8 - SELECT | Output voltage select input | Tie to VIN for 3.3V output; tie to GND for 5.0V output - no resistor needed, no floating state allowed. |
Key Features
| Feature | Design Value |
|---|---|
| Inductorless buck/boost topology | Eliminates magnetic components, reducing solution size, cost, and EMI risk in compact portable designs. |
| Soft-start circuitry | Limiting in-rush current during startup; achieves regulation in ~300 µs for 5V output, preventing system brownouts. |
| Integrated thermal shutdown | Shuts down at ~160°C junction temperature with 15°C hysteresis - protects against sustained overload or poor heatsinking. |
| Short-circuit foldback protection | Limits output current to ~200 mA during hard shorts - prevents damage while allowing safe recovery after fault removal. |
| AEC-Q100 qualified | Validated for automotive applications per stress test requirements - supports use in infotainment and telematics modules. |
Applications
| White LED Backlighting | Flash Memory Supply |
|---|---|
Use Scenario: Driving 4–6-series white LEDs from single Li-ion cell (2.7–4.2V). IC Role / Device Role / Timing Role: Provides regulated 5.0V bias with low ripple and fast transient response to PWM dimming signals. Use Value: Enables uniform brightness across LED strings without inductor-induced EMI or audible noise. | Use Scenario: Powering NAND/NOR flash memory requiring stable 3.3V supply during program/erase cycles. IC Role / Device Role / Timing Role: Delivers clean, low-noise 3.3V rail with ±2.5% accuracy and PGOOD monitoring for voltage integrity checks. Use Value: Prevents data corruption by ensuring flash VCC remains within spec during high-current write bursts. |
| GSM SIM Interface Supply | Smart Card Reader Bias |
Use Scenario: Generating 5.0V SIM card supply from 3.3V system rail in GSM handsets. IC Role / Device Role / Timing Role: Acts as compact, efficient boost converter with 1 MHz switching to minimize capacitor footprint. Use Value: Meets ETSI TS 102 221 SIM power requirements while fitting tight mobile phone PCB real estate. | Use Scenario: Providing 3.3V or 5.0V to ISO 7816-compliant smart cards in point-of-sale terminals. IC Role / Device Role / Timing Role: Supplies regulated, short-circuit-protected voltage with soft-start to prevent card reset glitches during insertion. Use Value: Guarantees reliable card communication and meets contact power sequencing standards. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar charge pump DC/DC converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1252T-33X50E/MS | 650 kHz switching frequency; higher output ripple (50 mVp-p); same pinout and functionality. | Better suited for noise-sensitive IF bands where 1 MHz may cause interference. | Select MCP1252T-33X50E/MS if system layout cannot filter 1 MHz harmonics or if larger flying capacitor is acceptable. |
| TPS60403DBVR | 3.3V fixed output only; 550 kHz switching; 60 mA max output; SOT-23-6 package. | Limited to lower-current, single-output applications; lacks SELECT pin flexibility and extended temperature rating. | Choose TPS60403DBVR only for cost-sensitive, low-power designs where 120 mA and dual-voltage selection are unnecessary. |
Compared with MCP1252T-33X50E/MS and TPS60403DBVR, the MCP1253T-33X50E/MSVAO offers higher output current, dual-voltage configurability, and extended temperature support - making it optimal for automotive-grade portable electronics requiring robust, flexible bias generation.
Availability
MCP1253T-33X50E/MSVAO is available at Aetrix Electronics and suitable for white LED backlighting, flash memory supply, GSM SIM interface, and smart card reader applications requiring stable component supply across automotive and industrial temperature ranges.
Supply support for MCP1253T-33X50E/MSVAO 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 microcontroller, mixed-signal, analog, and Flash-IP solutions, serving automotive, industrial, consumer, and communications markets with high-reliability silicon and development tools.
The MCP1253 belongs to Microchip's low-noise, inductorless charge pump DC/DC converter product line, designed specifically for compact, battery-powered systems needing efficient, flexible, and EMI-friendly voltage boosting or stepping-down without magnetics.
FAQ
What output voltages does the MCP1253T-33X50E/MSVAO support, and how is selection implemented?
The MCP1253T-33X50E/MSVAO supports two fixed output voltages: 3.3V and 5.0V. Selection is implemented via the SELECT pin - connect SELECT to VIN for 3.3V output, or to GND for 5.0V output. No external resistors or configuration registers are required. This hardware-select method ensures deterministic behavior and eliminates firmware dependencies in the MCP1253T-33X50E/MSVAO design.
Does the MCP1253T-33X50E/MSVAO require an inductor, and what external components are mandatory?
No, the MCP1253T-33X50E/MSVAO is an inductorless charge pump converter. Mandatory external components are three ceramic capacitors: 10 µF input (CIN), 10 µF output (COUT), and 1 µF flying capacitor (CFLY) between C+ and C− pins. All must be low-ESR X7R types. No inductor, diodes, or feedback resistors are needed - simplifying bill of materials and layout for the MCP1253T-33X50E/MSVAO.
What is the purpose and electrical behavior of the PGOOD pin on the MCP1253T-33X50E/MSVAO?
The PGOOD pin on the MCP1253T-33X50E/MSVAO is an open-drain output that signals regulation status. It remains high-impedance when VOUT is within specification, and pulls low when VOUT drops below 93% of nominal (e.g., <4.65V for 5.0V mode). It has 4% hysteresis and is disabled during shutdown. A 10 kΩ–1 MΩ pull-up to VOUT is required for logic-level interfacing - providing system-level fault detection for the MCP1253T-33X50E/MSVAO.
How does the MCP1253T-33X50E/MSVAO handle thermal overload, and what is its maximum junction temperature?
The MCP1253T-33X50E/MSVAO incorporates thermal shutdown with hysteresis: it disables operation when junction temperature exceeds ~160°C and automatically recovers when temperature falls by ~15°C. This protects against sustained overload or inadequate PCB copper. Maximum rated junction temperature is +125°C under continuous operation. The MSOP-8 package has θJA = 206°C/W on single-layer board - proper thermal land design is essential to maintain reliability of the MCP1253T-33X50E/MSVAO.
Is the MCP1253T-33X50E/MSVAO qualified for automotive applications, and what evidence supports this?
Yes, the MCP1253T-33X50E/MSVAO is AEC-Q100 qualified and specified for Extended Temperature range (–40°C to +125°C), explicitly documented in Microchip's DS20001752C datasheet. Its qualification covers stress testing per AEC-Q100 Rev-G, including HTOL, TC, and ESD. This makes the MCP1253T-33X50E/MSVAO suitable for automotive infotainment, telematics, and body electronics where ambient temperatures exceed industrial limits.
MCP1253T-33X50E/MSVAO Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Up/Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck-Boost, Charge Pump
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.7V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 3.3V, 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 120mA
- Frequency - Switching:
- 1MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-MSOP
MCP1253T-33X50E/MSVAO FAQ
1.How can I place an order for MCP1253T-33X50E/MSVAO through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP1253T-33X50E/MSVAO 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 MCP1253T-33X50E/MSVAO reliable?
The price and inventory of MCP1253T-33X50E/MSVAO are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MCP1253T-33X50E/MSVAO is usually 5 days.
3.What payment methods are accepted for MCP1253T-33X50E/MSVAO?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP1253T-33X50E/MSVAO transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP1253T-33X50E/MSVAO?
MCP1253T-33X50E/MSVAO orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP1253T-33X50E/MSVAO 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 MCP1253T-33X50E/MSVAO?
For technical support, including MCP1253T-33X50E/MSVAO datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP1253T-33X50E/MSVAO requirements.
6.How does Aetrix verify that MCP1253T-33X50E/MSVAO is sourced from the original manufacturer or authorized distributors?
All MCP1253T-33X50E/MSVAO 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 MCP1253T-33X50E/MSVAO meets industry standards.
7.What is the process for return or replacement of MCP1253T-33X50E/MSVAO?
All MCP1253T-33X50E/MSVAO units undergo pre-shipment inspection (PSI). If there is an issue with MCP1253T-33X50E/MSVAO, 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 MCP1253T-33X50E/MSVAO part is unused and in its original packaging.
Return procedure for MCP1253T-33X50E/MSVAO:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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