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NXP Semiconductors MC34PF1550A6EP
- Part No.:
- MC34PF1550A6EP
- Manufacturer:
- NXP Semiconductors
- Category:
- Power Management - Specialized
- Package:
- 40-VFQFN Exposed Pad
- Datasheet:
-
MC34PF1550A6EP.pdf
- Description:
- PF1550
- Quantity:
- Payment:
- Shipping:
Inventory:4,080
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Product details
Overview
MC34PF1550A6EP from NXP Semiconductors is a preprogrammed power management IC (PMIC) optimized for i.MX 6ULL processors with DDR3L memory, delivering three 1.0 A buck converters, three LDOs, RTC supply (VSNVS), DDR reference voltage (VREFDDR), and a linear Li-ion battery charger supporting 100–1000 mA charge current and JEITA-compliant thermal regulation. It operates across −40 °C to 105 °C and targets battery-powered industrial IoT edge nodes.
For engineers reviewing the MC34PF1550A6EP datasheet, MC34PF1550A6EP pinout, MC34PF1550A6EP application, or MC34PF1550A6EP equivalent, key selection criteria include its OTP-configured startup sequence for i.MX 6ULL/DDR3L, VSYS transient withstand up to +22 V, programmable DVS on SW1/SW2, and integrated coin-cell backup for RTC retention - all in a 40-pin QFN 5.0 × 5.0 mm package with exposed pad.
Technical Context
The MC34PF1550A6EP implements a tightly integrated analog/digital PMIC architecture with dedicated I²C-controlled regulators, OTP-programmable power sequencing, and hardware-based battery path management. Its dual-mode buck regulators (SW1/SW2) support dynamic voltage scaling for ARM core and digital domain supplies, while SW3 provides fixed 1.8–3.3 V output for peripherals.
Thermal regulation thresholds (80/95/110 °C), JEITA-compliant thermistor monitoring via THM pin, and battery overcurrent protection up to 3.0 A are implemented in analog circuitry with interrupt reporting via INTB. The device includes an internal 16 MHz clock generator and 32 kHz oscillator for RTC and watchdog timing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input voltage range (VBUSIN) | 4.1 V to 6.0 V; supports USB bus or AC adapter input with 22 V transient withstand capability |
| Buck converter output (SW1/SW2) | 0.6 V to 1.3875 V in 12.5 mV steps or 1.1 V to 3.3 V in variable steps; enables DVS for i.MX 6ULL core and memory domains |
| Buck converter output (SW3) | 1.8 V to 3.3 V in 100 mV steps; fixed-output supply for I/O peripherals and interfaces |
| LDO outputs (LDO1/LDO2/LDO3) | LDO1/LDO3: 0.75–1.5 V or 1.8–3.3 V at 300 mA; LDO2: 1.8–3.3 V at 400 mA; all support soft-start and load-switch mode |
| Battery charging | Linear charger for single-cell Li-ion/Li-Po; programmable 100–1000 mA charge current, 3.5–4.44 V charge voltage, and 5–50 mA termination current |
| RTC & memory support | VSNVS = 3.0 V / 2.0 mA; VREFDDR = 0.5–0.9 V / 10 mA; integrated coin-cell charger for battery-backed real-time clock operation |
| Operating temperature | −40 °C to 105 °C; qualified for industrial applications with junction limit of 125 °C |
Pinout & Package
MC34PF1550A6EP uses a 40-pin QFN package (5.0 mm × 5.0 mm, 0.5 mm pitch) with exposed thermal pad (EPAD, Pin 41) requiring PCB ground connection for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW1FB (Pin 27) | Buck 1 feedback input | Connects external resistor divider to set VCORE output voltage; enables precise DVS control for i.MX 6ULL core rail |
| SW2FB (Pin 16) | Buck 2 feedback input | Configures VDIG output voltage; used for digital domain supply with independent DVS capability |
| SW3FB (Pin 15) | Buck 3 feedback input | Fixed 1.8–3.3 V output; no DVS; supplies peripheral I/O rails such as USBPHY and SD/MMC interfaces |
| VREFDDR (Pin 21) | DDR memory reference voltage output | Provides 0.5–0.9 V reference for DDR3L termination; sourced from VINREFDDR (Pin 22) and regulated internally |
| VSNVS (Pin 30) | RTC supply output | 3.0 V / 2.0 mA low-noise supply for real-time clock and backup registers; retains state during main power loss |
| THM (Pin 32) | Thermistor bias connection | Analog input for NTC thermistor; enables JEITA-compliant battery temperature monitoring and charge throttling |
| CHGB (Pin 40) | Charger LED driver sink | Open-drain output driving LED anode connected to VSYS; supports programmable duty cycle (10–100%) and frequency (0.5–256 Hz) |
| INTB (Pin 9) | Interrupt open-drain output | Active-low signal indicating charger fault, thermal event, or regulator status change; requires external pull-up |
Key Features
| Feature | Design Value |
|---|---|
| OTP-programmed configuration | Preloaded startup sequence, regulator voltages, and timing specifically for i.MX 6ULL with DDR3L memory interface |
| DVS-capable buck regulators | SW1 and SW2 support dynamic voltage scaling under processor control via I²C, reducing active power in ARM core and digital domains |
| VSYS transient robustness | Withstands DC and transient inputs up to +22 V on VSYS pin, enabling reliable operation during hot-plug or surge events |
| Integrated battery path management | Includes 50 mΩ isolation MOSFET, battery supplement mode, and 2–4 A programmable overcurrent protection with 12.8 ms debounce |
| JEITA-compliant thermal charging | Monitors battery temperature via THM pin using internal 2.7 V reference (INT2P7) and supports 5 thermal zones with hysteresis |
Applications
| Industrial Edge Gateway | Smart Wearable Hub |
|---|---|
Use Scenario: Compact, fanless gateway aggregating sensor data from Modbus/RS-485 field devices and forwarding via LTE/Wi-Fi to cloud platforms. IC Role / Device Role / Timing Role: MC34PF1550A6EP powers i.MX 6ULL SoC, DDR3L memory, and communication modules while managing Li-ion backup for RTC and firmware update persistence. Use Value: OTP-configured sequencing ensures deterministic boot; VSYS 22 V tolerance eliminates need for external TVS; integrated coin-cell charging maintains timekeeping during mains failure. | Use Scenario: Multi-sensor wearable (ECG, SpO₂, motion) with Bluetooth LE connectivity and multi-day battery life. IC Role / Device Role / Timing Role: MC34PF1550A6EP delivers regulated VCORE (1.0–1.2 V), VDIG (1.1 V), and peripheral rails (1.8/3.3 V) while charging via micro-USB and monitoring battery health via thermistor. Use Value: Ultra-low quiescent current (<1.5 µA in low-power mode) extends runtime; programmable LED driver (CHGB) provides visual battery status without MCU intervention. |
| POS Terminal with NFC | Home Automation Controller |
Use Scenario: Battery-backed point-of-sale terminal supporting contactless payment, barcode scanning, and thermal printing. IC Role / Device Role / Timing Role: MC34PF1550A6EP supplies i.MX 6ULL, NFC controller, and display interface while managing fast-charging via 5 V USB and maintaining secure RTC time for transaction logging. Use Value: Integrated 3.0 A battery discharge overcurrent protection safeguards against short-circuit faults; VREFDDR precision (±1%) ensures stable DDR3L interface timing. | Use Scenario: Wall-mounted Zigbee/Z-Wave hub with local voice assistant processing and battery fallback during grid outage. IC Role / Device Role / Timing Role: MC34PF1550A6EP powers i.MX 6ULL application processor, wireless co-processors, and audio codec while retaining RTC and configuration in VSNVS during brownout. Use Value: VSNVS 3.0 V output sustains RTC and SRAM for >10 years on coin cell; programmable thermal regulation prevents battery damage in enclosed enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PMIC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC34PF1550A3EP | OTP-configured for i.MX 6UL with DDR3L; lacks i.MX 6ULL-specific timing and DDR3L initialization sequences | Targeted at i.MX 6UL-based designs; not validated for i.MX 6ULL's lower-voltage DDR3L timing margins | Select only if migrating from i.MX 6UL to 6ULL with full revalidation of power sequencing and DDR training |
| MPF5020-A0 | NXP's newer dual-core PMIC with higher integration (integrated DC-DC controllers, enhanced safety features); no OTP preconfiguration for i.MX 6ULL | Requires full firmware development for sequencing; supports ASIL-B functional safety but adds design complexity | Choose for new designs needing safety certification or higher efficiency; avoid for drop-in replacement due to pinout and register map differences |
Compared with MC34PF1550A3EP and MPF5020-A0, the MC34PF1550A6EP offers guaranteed i.MX 6ULL/DDR3L compatibility out-of-box, eliminating sequencing validation effort, while providing optimal trade-offs between integration, thermal robustness, and industrial temperature support without safety overhead.
Availability
MC34PF1550A6EP is available at Aetrix Electronics and suitable for industrial edge gateways, smart wearable hubs, and battery-backed home automation controllers requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for MC34PF1550A6EP 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
NXP Semiconductors is a global semiconductor company specializing in secure connectivity solutions for automotive, industrial, and IoT applications, with leadership in ARM-based application processors and power management.
The PF1550 product line was designed specifically to simplify power architecture for NXP's i.MX low-power application processors, integrating all essential rails, battery management, and sequencing into a single configurable PMIC for portable and industrial edge devices.
FAQ
What distinguishes MC34PF1550A6EP from other PF1550 variants?
The MC34PF1550A6EP is uniquely OTP-programmed for i.MX 6ULL processors with DDR3L memory, including optimized startup timing, voltage ramp rates, and DDR initialization sequences. Unlike generic PF1550 versions, it guarantees compatibility with i.MX 6ULL's specific power requirements without requiring custom OTP programming or firmware tuning. This makes MC34PF1550A6EP ideal for production deployments targeting this exact SoC configuration.
Does MC34PF1550A6EP support dynamic voltage scaling for both core and digital domains?
Yes, MC34PF1550A6EP supports dynamic voltage scaling (DVS) on SW1 (VCORE) and SW2 (VDIG) buck converters via I²C commands. This allows real-time adjustment of core and digital supply voltages based on i.MX 6ULL workload, reducing active power consumption. SW3 is fixed-output and does not support DVS. DVS functionality is enabled by default in the OTP configuration and requires no additional hardware changes to use.
Can MC34PF1550A6EP operate with a 22 V transient on the VSYS pin?
Yes, MC34PF1550A6EP's VSYS pin is rated to withstand transients up to +22 V, as confirmed in the absolute maximum ratings table. This capability allows direct connection to unregulated 12 V or 24 V industrial power sources with minimal external protection, simplifying system-level surge handling. The internal VSYS regulator remains functional during these events, ensuring uninterrupted operation of downstream rails like VCORE and VDIG.
How is battery temperature monitored in MC34PF1550A6EP?
MC34PF1550A6EP monitors battery temperature using the THM pin connected to an NTC thermistor tied to ground. Internal circuitry compares the thermistor voltage against five programmable thresholds (−10 °C to 60 °C) derived from the 2.7 V INT2P7 reference. This enables JEITA-compliant charging behavior - pausing or reducing charge current outside safe temperature bands - with hysteresis to prevent oscillation. No external ADC or processor involvement is required.
Is the VREFDDR output on MC34PF1550A6EP suitable for DDR3L memory interfaces?
Yes, the VREFDDR output on MC34PF1550A6EP is explicitly specified for DDR3L memory interfaces, delivering 0.5 V to 0.9 V at 10 mA with ±1% accuracy. It is sourced from VINREFDDR (Pin 22) and internally regulated to meet DDR3L JEDEC specifications for reference voltage stability and noise immunity. This eliminates the need for an external DDR reference IC when using i.MX 6ULL with DDR3L memory.
MC34PF1550A6EP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 40-VFQFN Exposed Pad
- Packaging:
- Tray
- Product Status:
- Active
- Applications:
- Embedded Systems, Low-Power IoT, Mobile/Wearable Devices
- Current - Supply:
- -
- Voltage - Supply:
- 3.8V ~ 7V
- Operating Temperature:
- -40°C ~ 105°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 40-HVQFN (5x5)
MC34PF1550A6EP FAQ
1.How can I place an order for MC34PF1550A6EP through Aetrix?
Please submit a Request for Quotation (RFQ) for MC34PF1550A6EP 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 MC34PF1550A6EP reliable?
The price and inventory of MC34PF1550A6EP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC34PF1550A6EP is usually 5 days.
3.What payment methods are accepted for MC34PF1550A6EP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC34PF1550A6EP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC34PF1550A6EP?
MC34PF1550A6EP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC34PF1550A6EP 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 MC34PF1550A6EP?
For technical support, including MC34PF1550A6EP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC34PF1550A6EP requirements.
6.How does Aetrix verify that MC34PF1550A6EP is sourced from the original manufacturer or authorized distributors?
All MC34PF1550A6EP 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 MC34PF1550A6EP meets industry standards.
7.What is the process for return or replacement of MC34PF1550A6EP?
All MC34PF1550A6EP units undergo pre-shipment inspection (PSI). If there is an issue with MC34PF1550A6EP, 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 MC34PF1550A6EP part is unused and in its original packaging.
Return procedure for MC34PF1550A6EP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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