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Microchip Technology MCP1253T-ADJI/MSVAO
- Part No.:
- MCP1253T-ADJI/MSVAO
- Manufacturer:
- Microchip Technology
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MCP1253T-ADJI/MSVAO.pdf
- Description:
- IC REG BUCK BST ADJ 120MA 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,184
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Product details
Overview
MCP1253T-ADJI/MSVAO from Microchip Technology is an inductorless, positive-regulated charge pump DC/DC converter with adjustable output (1.5V–5.5V), 120 mA output current, ±2.5% output voltage accuracy, and 1 MHz switching frequency. It operates from 2.0V to 5.5V input and features thermal shutdown, short-circuit protection, and soft-start - ideal for space-constrained battery-powered systems requiring buck/boost conversion without inductors.
For engineers reviewing the MCP1253T-ADJI/MSVAO datasheet, MCP1253T-ADJI/MSVAO pinout, MCP1253T-ADJI/MSVAO application, or MCP1253T-ADJI/MSVAO equivalent, key selection criteria include its adjustable output range, low 60 µA quiescent current, 0.1 µA shutdown current, MSOP-8 package compatibility, and AEC-Q100 qualification for automotive-grade reliability.
Technical Context
The MCP1253T-ADJI/MSVAO uses a hysteretic bang-bang charge pump control architecture that automatically transitions between buck and boost modes based on VIN vs. VOUT relationship. Its internal 1 MHz oscillator enables smaller external flying capacitors (1 µF typical) versus lower-frequency variants like the MCP1252.
Regulation is achieved via feedback (FB) pin monitoring of a resistor divider; the internal reference is 1.21 V (±0.03 V). PGOOD asserts open-drain low when VOUT falls below 0.93×VOUT (typical), with 4% hysteresis, enabling reliable power-good signaling in noise-sensitive applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 2.0V to 5.5V - supports single-cell Li-ion, NiMH, or 3.3V/5V system rails without level-shifting. |
| Output Voltage | Adjustable 1.5V–5.5V - set by external R1/R2 divider; VFB = 1.21V ±0.03V enables precise regulation. |
| Output Current | 120 mA max - sufficient for biasing 6-white-LED arrays or powering SIM/GSM interface circuitry. |
| Quiescent Current | 60 µA typical - minimizes battery drain in always-on sensor nodes or portable displays. |
| Shutdown Current | 0.1 µA typical - enables ultra-low-power sleep states in wearables and IoT endpoints. |
| Switching Frequency | 1 MHz - allows use of compact 0805-size 1 µF ceramic flying capacitor, reducing board area vs. 650 kHz parts. |
| Accuracy | ±2.5% over -40°C to +85°C - meets industrial timing and analog supply requirements without calibration. |
Pinout & Package
Package: 8-Lead MSOP (3.0 mm × 3.0 mm, 0.65 mm pitch), RoHS-compliant, Pb-free, rated for industrial temperature (-40°C to +85°C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - PGOOD | Open-drain power-good flag | Signals regulation status; requires external pull-up; sinks current if VOUT drops below 93% nominal. |
| 2 - VOUT | Regulated output node | Delivers up to 120 mA; must be bypassed with ≥10 µF low-ESR ceramic capacitor. |
| 3 - VIN | Main power input | Accepts 2.0–5.5V; requires local 10 µF ceramic decoupling to suppress high-frequency switching noise. |
| 4 - GND | Analog/digital ground reference | Must connect to solid ground plane to minimize EMI and ensure stable regulation. |
| 5 - C- | Flying capacitor negative terminal | Completes charge-transfer path; polarity critical for polarized capacitors. |
| 6 - C+ | Flying capacitor positive terminal | High dv/dt node; requires low-ESR 1 µF ceramic capacitor placed adjacent to pins 5/6. |
| 7 - SHDN | Active-low enable control | Logic-low disables all switching; compatible with 1.8V CMOS logic; pulls device into 0.1 µA sleep mode. |
| 8 - FB | Feedback input for adjustable output | Connects to resistor divider (R1 to VOUT, R2 to GND); sets VOUT = 1.21V × (1 + R1/R2). |
Key Features
| Feature | Design Value |
|---|---|
| Inductorless architecture | Eliminates magnetic components, reducing EMI, board area, and BOM cost in portable designs. |
| Buck/boost auto-switching | Seamlessly delivers regulated output whether VIN is above or below VOUT - ideal for aging battery rails. |
| Soft-start circuitry | Limiting in-rush current during startup; achieves 90% VOUT regulation in ~300 µs (5V output). |
| AEC-Q100 qualified | Validated for automotive applications including infotainment displays and telematics modules. |
| Thermal & short-circuit protection | Shuts down at 160°C junction temp; foldback limits short-circuit current to 200 mA (typical). |
Applications
| White LED Backlighting | Smart Card Readers |
|---|---|
Use Scenario: Driving 4–6-series white LEDs from a single Li-ion cell (2.7–4.2V). IC Role / Device Role / Timing Role: Adjustable-output charge pump providing constant-current bias via PWM-controlled current-limit resistors. Use Value: Enables uniform brightness across full battery discharge curve without inductor-induced EMI in display assemblies. | Use Scenario: Supplying 3.3V or 5.0V to ISO 7816-compliant smart card interfaces in point-of-sale terminals. IC Role / Device Role / Timing Role: Local voltage translator generating stable card VCC independent of host rail fluctuations. Use Value: Guarantees ±2.5% output accuracy required for EMV L1 certification and prevents card reset failures during hot-plug events. |
| GSM SIM Interface Supply | PCMCIA Local 5V Supplies |
Use Scenario: Powering SIM card logic and RF transceiver bias in dual-SIM mobile handsets. IC Role / Device Role / Timing Role: Low-noise, fast-wakeup DC/DC converter delivering 5V from shared 3.3V system rail. Use Value: 300 µs wake-up time ensures SIM detection within 100 ms after network registration request. | Use Scenario: Generating isolated 5V for PCMCIA/CardBus peripheral slots in industrial laptops and docking stations. IC Role / Device Role / Timing Role: Compact, high-efficiency local regulator replacing bulky discrete solutions. Use Value: MSOP-8 footprint fits tight PCB real estate; 1 MHz operation avoids interference with 2.4 GHz Wi-Fi coexistence bands. |
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-ADJI/MS | 650 kHz switching frequency; higher output ripple (50 mVp-p vs. 45 mVp-p); same pinout and FB architecture. | Suitable where board space permits larger flying capacitors and EMI sensitivity is lower. | Select MCP1252T-ADJI/MS only if 1 MHz EMI conflicts exist or legacy layout reuse is prioritized. |
| TPS60403DBVR | Fixed 3.3V output; no adjustable option; 600 kHz; 100 mA max output; different pinout (SOT-23-6). | Limited to fixed-voltage use cases; lacks PGOOD and thermal protection; not AEC-Q100 qualified. | Choose TPS60403DBVR only for cost-sensitive, non-automotive, fixed-3.3V applications with minimal feature requirements. |
Compared with MCP1252T-ADJI/MS, the MCP1253T-ADJI/MS delivers faster transient response and smaller external components due to its 1 MHz frequency; versus TPS60403DBVR, it offers design flexibility through adjustability, robust protection features, and automotive qualification - critical for next-generation portable and automotive electronics.
Availability
MCP1253T-ADJI/MSVAO is available at Aetrix Electronics and suitable for white LED backlighting, smart card readers, GSM SIM interface supplies, and PCMCIA local 5V supplies requiring stable component supply across industrial temperature ranges.
Supply support for MCP1253T-ADJI/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, engineered specifically for battery-powered portable electronics needing compact, efficient, and flexible voltage translation without magnetics.
FAQ
What output voltage range does the MCP1253T-ADJI/MSVAO support?
The MCP1253T-ADJI/MSVAO supports an adjustable output voltage from 1.5V to 5.5V, set by an external resistor divider connected to the FB pin. The internal feedback reference is 1.21V ±0.03V, enabling precise regulation across the full range - for example, 3.0V output requires R1 = 14.9 kΩ and R2 = 10 kΩ. This makes MCP1253T-ADJI/MSVAO suitable for diverse rail requirements in portable systems.
Does the MCP1253T-ADJI/MSVAO require an inductor?
No, the MCP1253T-ADJI/MSVAO is an inductorless charge pump DC/DC converter. It uses two external ceramic capacitors - a 1 µF flying capacitor (C+ and C− pins) and ≥10 µF output capacitor (VOUT to GND) - to achieve buck/boost conversion. This eliminates magnetic components, reduces EMI, and simplifies layout - a key advantage of MCP1253T-ADJI/MSVAO in space-constrained designs.
What is the purpose of the PGOOD pin on the MCP1253T-ADJI/MSVAO?
The PGOOD pin on the MCP1253T-ADJI/MSVAO is an open-drain output that signals when VOUT is within regulation (typically >93% of target). It remains high-impedance during normal operation and pulls low if VOUT drops out of spec - enabling system-level fault detection and sequencing. A 10–100 kΩ pull-up to VOUT is required; this functionality is integral to MCP1253T-ADJI/MSVAO's reliability in mission-critical power domains.
How does the MCP1253T-ADJI/MSVAO handle thermal overload?
The MCP1253T-ADJI/MSVAO incorporates thermal shutdown with hysteresis: it disables operation when junction temperature exceeds ~160°C and automatically recovers once die temperature falls by ~15°C. This protects against sustained overloads or poor heatsinking. Unlike latch-off devices, MCP1253T-ADJI/MSVAO cycles on/off under continuous overload - a behavior documented in the datasheet and inherent to MCP1253T-ADJI/MSVAO's protection architecture.
Is the MCP1253T-ADJI/MSVAO AEC-Q100 qualified?
Yes, the MCP1253T-ADJI/MSVAO is AEC-Q100 qualified for automotive applications. This qualification covers stress testing for temperature cycling, humidity, ESD, and reliability - confirming suitability for use in infotainment displays, telematics units, and other automotive subsystems. The "I" suffix in MCP1253T-ADJI/MSVAO denotes industrial temperature grade (-40°C to +85°C), which aligns with AEC-Q100 Grade 3 requirements.
MCP1253T-ADJI/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:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1.5V
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 120mA
- Frequency - Switching:
- 1MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-MSOP
MCP1253T-ADJI/MSVAO FAQ
1.How can I place an order for MCP1253T-ADJI/MSVAO through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP1253T-ADJI/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-ADJI/MSVAO reliable?
The price and inventory of MCP1253T-ADJI/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-ADJI/MSVAO is usually 5 days.
3.What payment methods are accepted for MCP1253T-ADJI/MSVAO?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP1253T-ADJI/MSVAO transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP1253T-ADJI/MSVAO?
MCP1253T-ADJI/MSVAO orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP1253T-ADJI/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-ADJI/MSVAO?
For technical support, including MCP1253T-ADJI/MSVAO datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP1253T-ADJI/MSVAO requirements.
6.How does Aetrix verify that MCP1253T-ADJI/MSVAO is sourced from the original manufacturer or authorized distributors?
All MCP1253T-ADJI/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-ADJI/MSVAO meets industry standards.
7.What is the process for return or replacement of MCP1253T-ADJI/MSVAO?
All MCP1253T-ADJI/MSVAO units undergo pre-shipment inspection (PSI). If there is an issue with MCP1253T-ADJI/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-ADJI/MSVAO part is unused and in its original packaging.
Return procedure for MCP1253T-ADJI/MSVAO:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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