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Microchip Technology MCP1252T-33X50I/MS
- Part No.:
- MCP1252T-33X50I/MS
- Manufacturer:
- Microchip Technology
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MCP1252T-33X50I/MS.pdf
- Description:
- IC REG CHARGE PUMP PROG 1 8MSOP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
MCP1252T-33X50I/MS from Microchip Technology is a fixed-output, inductorless charge pump DC/DC converter delivering 3.3V or 5.0V at up to 120 mA with ±2.5% output voltage accuracy, 650 kHz switching frequency, and operation from 2.0V–5.5V input-designed for space-constrained battery-powered systems such as SIM interface supplies and white LED biasing.
For engineers reviewing the MCP1252T-33X50I/MS datasheet, MCP1252T-33X50I/MS pinout, MCP1252T-33X50I/MS application, or MCP1252T-33X50I/MS equivalent, key selection criteria include its buck/boost capability without inductors, thermal shutdown protection, 8-pin MSOP package, and selectable fixed output via the SELECT pin-critical for low-noise, low-ESR ceramic-capacitor-based power rails.
Technical Context
The MCP1252T-33X50I/MS implements a hysteretic (bang-bang) switched-capacitor charge pump architecture that automatically transitions between buck and boost modes depending on VIN relative to VOUT. Its internal 650 kHz oscillator avoids IF band interference and enables use of small 1 µF flying capacitors.
Regulation relies on a fixed internal reference (1.21 V) and PGOOD monitoring with 7% undervoltage threshold and 4% hysteresis. Soft-start limits in-rush current to ~300 µs settling time, while foldback short-circuit protection caps output current at 200 mA (typical) and thermal shutdown activates at 160°C (typical) with 15°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VOUT Options | 3.3V (SELECT = VIN) or 5.0V (SELECT = GND), fixed-enables single-part support for dual-rail systems without external feedback resistors |
| Output Current | 120 mA max at VIN ≥ 2.5V (3.3V mode) or VIN ≥ 3.0V (5.0V mode)-supports multi-LED biasing and flash memory supply loads |
| Input Voltage Range | 2.0V to 5.5V-compatible with single-cell Li-ion (2.7–4.2V), NiMH, and 3.3V/5V logic rails |
| Quiescent Current | 60 µA typical (no load)-extends battery life in always-on portable devices |
| Shutdown Current | 0.1 µA typical-enables ultra-low-power sleep states in GSM handsets and smart card readers |
| Switching Frequency | 650 kHz-avoids AM radio and IF bands; allows compact 0805-size flying capacitor (CFLY = 1 µF) |
| Output Ripple | 50 mVp-p typical-low enough for analog sensor biasing and display bias without additional LDO post-regulation |
Pinout & Package
Package: 8-lead MSOP (3.0 mm × 3.0 mm, 0.65 mm pitch), surface-mount, RoHS-compliant, tape-and-reel delivery.
| 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; high-impedance during shutdown-enables system-level power sequencing and fault detection |
| 2 - VOUT | Regulated output voltage node | Delivers 3.3V or 5.0V; must be bypassed with ≥10 µF X7R ceramic capacitor to ground-determines output stability and ripple performance |
| 3 - VIN | Main power input | Accepts 2.0–5.5V; requires local 10 µF ceramic decoupling-supplies energy to charge pump and sets operational mode (buck/boost) |
| 4 - GND | Power and signal reference | Low-impedance return path for flying capacitor switching currents; must connect to solid ground plane-minimizes noise coupling into sensitive analog circuits |
| 5 - C− | Flying capacitor negative terminal | Completes charge transfer loop with C+; polarity-sensitive with polarized capacitors-forms half of the flying capacitor pair critical for charge pumping efficiency |
| 6 - C+ | Flying capacitor positive terminal | Completes charge transfer loop with C−; polarity-sensitive with polarized capacitors-switches between VIN and VOUT phases to enable buck/boost conversion |
| 7 - SHDN | Active-low shutdown control | Logic-compatible with 1.8V systems; pulls device into 0.1 µA state-enables host MCU to manage power domains dynamically |
| 8 - SELECT | Output voltage select input | Connect to VIN for 3.3V output; connect to GND for 5.0V output-eliminates need for external resistor dividers in fixed-voltage applications |
Key Features
| Feature | Design Value |
|---|---|
| Inductorless buck/boost topology | Enables PCB area reduction by eliminating magnetic components-ideal for ultra-thin mobile and wearable designs |
| Thermal + short-circuit protection | Prevents latch-up or damage under overload or elevated ambient conditions-supports robust operation in unventilated enclosures |
| Soft-start circuitry | Limits in-rush current during power-up or wake-up, achieving regulation within 300 µs-prevents brown-out in shared input rails |
| AEC-Q100 qualified | Validated for automotive temperature range and stress testing-permits use in infotainment and telematics modules |
| Low ESR capacitor compatibility | Optimized for 10 µF X7R ceramics on input/output and 1 µF on flying cap-reduces BOM cost and improves reliability vs. tantalum/aluminum |
Applications
| White LED Backlighting | Smart Card Reader Supply |
|---|---|
Use Scenario: Driving 4–6 parallel white LEDs from a single-cell Li-ion battery (2.7–4.2V). IC Role / Device Role / Timing Role: Fixed 5.0V charge pump regulator providing constant-current bias via external current-setting resistors. Use Value: Eliminates inductor size and EMI concerns while delivering stable 5V rail with <50 mVp-p ripple-enabling uniform brightness and PWM contrast control. | Use Scenario: Powering ISO 7816-compliant smart cards requiring precise 5.0V ±5% supply during contact activation. IC Role / Device Role / Timing Role: Selectable-output DC/DC converter configured for 5.0V mode (SELECT = GND) with PGOOD monitoring. Use Value: Ensures compliant voltage delivery across full battery discharge curve (2.7–5.5V input); PGOOD enables host MCU to verify supply readiness before card initialization. |
| GSM SIM Interface Supply | PCMCIA Local 5V Supply |
Use Scenario: Generating 3.3V for SIM card I/O and 5.0V for SIM card VCC in dual-voltage GSM phone platforms. IC Role / Device Role / Timing Role: Single-device solution supporting both voltages via SELECT pin reconfiguration-used in baseband processor power domains. Use Value: Reduces component count versus dual-LDO or dual-charge-pump solutions; 1.8V-compatible SHDN enables direct control from application processor GPIOs. | Use Scenario: Providing regulated 5.0V to PCMCIA Type II slots in industrial handheld terminals operating from 3.3V system rails. IC Role / Device Role / Timing Role: Boost-mode charge pump converting 3.3V system input to 5.0V slot supply with soft-start and overcurrent limiting. Use Value: Meets PCMCIA 2.01 specification for 5V supply slew rate and regulation; thermal shutdown prevents damage during hot-plug insertion events. |
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 |
|---|---|---|---|
| MCP1253T-33X50I/MS | 1 MHz switching frequency vs. 650 kHz; supports smaller 0603 flying capacitors; identical pinout and functionality | Better suited for ultra-dense layouts where board space is constrained and higher-frequency noise can be filtered | Select when minimizing footprint is prioritized over IF-band sensitivity; verify layout filtering for 1 MHz harmonics |
| TPS60403DBVR | 3.3V fixed output only; 600 kHz frequency; 100 mA max output; different pin assignment (no SELECT pin) | Limited to single-output systems; lacks voltage-select flexibility and PGOOD flag | Choose only for cost-sensitive, single-rail designs where 3.3V-only operation and absence of power-good signaling are acceptable |
Compared with MCP1253T-33X50I/MS, the MCP1252T-33X50I/MS offers lower EMI risk near IF receivers but requires slightly larger flying capacitors; versus TPS60403DBVR, it provides dual-voltage flexibility and system-level fault reporting via PGOOD-making it superior for multi-rail, safety-aware portable designs.
Availability
MCP1252T-33X50I/MS is available at Aetrix Electronics and suitable for white LED backlighting, SIM interface supply, and smart card reader applications requiring stable component supply, automotive-grade reliability, and tape-and-reel packaging for automated assembly.
Supply support for MCP1252T-33X50I/MS 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, headquartered in Chandler, Arizona, with global design, manufacturing, and sales operations.
The MCP1252/3 product line delivers low-noise, inductorless charge pump DC/DC converters targeting battery-powered portable electronics-including mobile handsets, wearables, and secure peripherals-where board area, EMI, and quiescent power are critical constraints.
FAQ
What output voltages does the MCP1252T-33X50I/MS support, and how is selection implemented?
The MCP1252T-33X50I/MS 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. This eliminates external feedback resistors and simplifies design for dual-rail systems. The MCP1252T-33X50I/MS does not support adjustable output; that function is reserved for the MCP1252-ADJ variant.
Does the MCP1252T-33X50I/MS require an inductor, and what external components are mandatory?
No, the MCP1252T-33X50I/MS is an inductorless charge pump DC/DC converter. Mandatory external components are three ceramic capacitors: 10 µF input (CIN), 10 µF output (COUT), and 1 µF flying capacitor (CFLY) placed between pins C+ and C−. All must be low-ESR X7R types; aluminum electrolytics are not recommended due to high ESR.
What protection features are integrated into the MCP1252T-33X50I/MS?
The MCP1252T-33X50I/MS integrates thermal shutdown (activates at ~160°C with 15°C hysteresis), foldback short-circuit protection (limits output current to ~200 mA), and soft-start circuitry (limits in-rush current and achieves regulation in ~300 µs). It also features an open-drain PGOOD output that signals undervoltage faults with 7% threshold and 4% hysteresis.
Is the MCP1252T-33X50I/MS compatible with 1.8V logic-level control signals?
Yes, the MCP1252T-33X50I/MS SHDN pin is compatible with 1.8V logic: VIH(min) = 1.4V and VIL(max) = 0.4V, ensuring reliable activation and deactivation using modern low-voltage MCUs. The SELECT pin similarly accepts 1.8V-compatible levels for voltage selection-no level-shifting circuitry is required.
What is the operating temperature range specified for the MCP1252T-33X50I/MS?
The MCP1252T-33X50I/MS is rated for the industrial temperature range of –40°C to +85°C, as indicated by the "I" suffix in the part number. It is AEC-Q100 qualified, confirming suitability for automotive infotainment and telematics applications where extended reliability under thermal stress is required.
MCP1252T-33X50I/MS 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:
- Charge Pump
- Output Type:
- Programmable
- 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:
- 650kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-MSOP
MCP1252T-33X50I/MS FAQ
1.How can I place an order for MCP1252T-33X50I/MS through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP1252T-33X50I/MS 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 MCP1252T-33X50I/MS reliable?
The price and inventory of MCP1252T-33X50I/MS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MCP1252T-33X50I/MS is usually 5 days.
3.What payment methods are accepted for MCP1252T-33X50I/MS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP1252T-33X50I/MS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP1252T-33X50I/MS?
MCP1252T-33X50I/MS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP1252T-33X50I/MS 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 MCP1252T-33X50I/MS?
For technical support, including MCP1252T-33X50I/MS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP1252T-33X50I/MS requirements.
6.How does Aetrix verify that MCP1252T-33X50I/MS is sourced from the original manufacturer or authorized distributors?
All MCP1252T-33X50I/MS 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 MCP1252T-33X50I/MS meets industry standards.
7.What is the process for return or replacement of MCP1252T-33X50I/MS?
All MCP1252T-33X50I/MS units undergo pre-shipment inspection (PSI). If there is an issue with MCP1252T-33X50I/MS, 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 MCP1252T-33X50I/MS part is unused and in its original packaging.
Return procedure for MCP1252T-33X50I/MS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MCP1252T-33X50I/MS Tags
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TPS562201DDCR
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MC34063ABD-TR
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TPS561201DDCR
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MC33063ADR
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MC34063ADR
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TPS560200DBVR
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AP3012KTR-G1
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TLV61048DBVR
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AZ34063UMTR-G1
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AP62300TWU-7
Diodes Incorporated
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MC34063EBD-TR
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