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NXP Semiconductors MC34PF1550A7EP
- Part No.:
- MC34PF1550A7EP
- Manufacturer:
- NXP Semiconductors
- Category:
- Power Management - Specialized
- Package:
- 40-VFQFN Exposed Pad
- Datasheet:
-
MC34PF1550A7EP.pdf
- Description:
- PF1550
- Quantity:
- Payment:
- Shipping:
Inventory:1,431
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Product details
Overview
MC34PF1550A7EP from NXP Semiconductors is a preprogrammed power management IC (PMIC) optimized for i.MX 6UL application processors with LPDDR2 memory subsystems. It integrates three 1.0 A buck converters, three LDOs (300 mA/400 mA/300 mA), 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 enables full power delivery in compact wearable and industrial IoT devices.
For engineers reviewing the MC34PF1550A7EP datasheet, MC34PF1550A7EP pinout, MC34PF1550A7EP application, or MC34PF1550A7EP equivalent, this page delivers verified technical context, validated pin functions, confirmed regulator output ranges, I²C-configurable startup sequences, and real-world use cases for low-power portable systems requiring robust battery charging and multi-rail power sequencing.
Technical Context
The MC34PF1550A7EP implements a tightly integrated analog-digital PMIC architecture with dedicated regulators for core (VCORE), digital (VDIG), and system (VSYS) rails, plus independent feedback paths for SW1/SW2 dynamic voltage scaling and SW3 fixed-output operation. Its OTP-programmed configuration (code A7) maps regulator voltages, timing, and power-down behavior specifically to i.MX 6UL + LPDDR2 timing and voltage requirements.
It features dual-mode battery power path management: VSYS serves as both main input and regulated output, with integrated 75 mΩ BATFET enabling seamless transition between USB/adapter input and battery backup. The thermistor interface (THM) and programmable thermal thresholds (80 °C/95 °C/110 °C) support JEITA-compliant charging control without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range (VBUSIN) | 4.1 V to 6.0 V - supports standard USB 5 V and 5.5 V AC adapters; withstands up to 22 V transient |
| Buck Converter Outputs | SW1/SW2: 0.6–1.3875 V (12.5 mV steps) or 1.1–3.3 V (variable); SW3: 1.8–3.3 V (100 mV steps) - covers i.MX 6UL core, DDR, and peripheral rail needs |
| Battery Charger | 100–1000 mA programmable CC current; 3.5–4.44 V CV range; 5–50 mA termination threshold - enables safe, configurable single-cell Li-ion charging |
| VREFDDR Output | 0.5–0.9 V at 10 mA - supplies precise DDR2/LPDDR2 reference voltage per JEDEC specification |
| Operating Temperature | −40 °C to 105 °C - qualified for industrial environments including edge gateways and ruggedized wearables |
| I²C Interface | Standard-mode (100 kHz) and fast-mode (400 kHz) compatible - allows runtime voltage adjustment and event monitoring by host processor |
| OTP Configuration | User-programmable startup sequence, soft-start timing, regulator voltages, and charger parameters - eliminates need for external configuration EEPROM |
Pinout & Package
MC34PF1550A7EP uses a 40-pin QFN package (5.0 mm × 5.0 mm, 0.5 mm pitch) with exposed thermal pad (EPAD) connected to ground for enhanced thermal dissipation in space-constrained designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW1FB / SW2FB / SW3FB | Buck feedback inputs | Enable precise closed-loop regulation of VCORE, VDIG, and peripheral rails; support DVS on SW1/SW2 |
| VBUSIN / VSYS / VBATT | Power path inputs/outputs | VBUSIN accepts USB/adapter input; VSYS is regulated system rail; VBATT connects to Li-ion cell with integrated 75 mΩ BATFET |
| VSNVS / VREFDDR / USBPHY | Dedicated LDO outputs | VSNVS provides 3.0 V RTC backup; VREFDDR supplies DDR reference; USBPHY powers USB PHY at 3.3 V or 4.9 V |
| SCL / SDA / INTB / WDI | I²C and control signals | Full bidirectional I²C communication; open-drain interrupt (INTB); watchdog input (WDI) for system-level fault recovery |
| THM / LICELL / CHGB | Battery management terminals | THM interfaces NTC thermistor for JEITA control; LICELL charges coin cell for RTC backup; CHGB drives status LED with PWM dimming |
Key Features
| Feature | Design Value |
|---|---|
| Dynamic Voltage Scaling (DVS) on SW1/SW2 | Enables real-time core voltage adjustment during i.MX 6UL DVFS operation, reducing active power by up to 30 % under light load |
| Programmable Battery Charge Termination | Configurable IEOC thresholds (5–50 mA) prevent overcharge while maintaining battery longevity in long-life IoT deployments |
| JEITA-Compliant Thermal Regulation | Three user-selectable thermal thresholds (80/95/110 °C) and hysteresis control charge current without external circuitry |
| VREFDDR Precision Output | 0.5–0.9 V range with ±1 % accuracy ensures stable DDR2/LPDDR2 memory interface timing across temperature and load |
| Integrated Coin Cell Charger (LICELL) | Maintains RTC functionality during main battery removal or deep discharge, critical for time-sensitive industrial logging |
Applications
| Smart Wearables | Industrial IoT Gateways |
|---|---|
Use Scenario: Compact wrist-worn health monitor with i.MX 6UL, optical sensor, BLE radio, and rechargeable Li-ion battery. IC Role / Device Role / Timing Role: MC34PF1550A7EP supplies VCORE (1.0–1.2 V), VDIG (1.1 V), VSYS (3.7 V), VREFDDR (0.675 V), and charges battery via micro-USB. Use Value: Single-chip solution eliminates discrete LDO/buck count; OTP A7 config matches i.MX 6UL + LPDDR2 boot timing and voltage ramp rates. | Use Scenario: Ruggedized edge gateway deployed in factory automation, running Linux on i.MX 6UL with RS-485, CAN, and Wi-Fi modules. IC Role / Device Role / Timing Role: MC34PF1550A7EP powers processor cores, DDR2 memory, I/O peripherals, and maintains RTC during mains failure via coin cell backup. Use Value: −40 °C to 105 °C rating ensures reliability; VSNVS and LICELL sustain timekeeping through extended brownouts. |
| Wireless Game Controllers | Home Automation Hubs |
Use Scenario: Low-latency Bluetooth gaming controller with motion sensors, haptic feedback, and USB-C recharging. IC Role / Device Role / Timing Role: MC34PF1550A7EP delivers regulated 1.1 V core, 3.3 V I/O, and 0.675 V DDR2 reference; manages battery charge/discharge cycles. Use Value: Soft-start and dynamic voltage scaling minimize inrush current and extend playtime between charges. | Use Scenario: Voice-controlled smart home hub integrating Zigbee, Z-Wave, and Matter-over-Thread radios with local AI inference. IC Role / Device Role / Timing Role: MC34PF1550A7EP powers i.MX 6UL application processor, LPDDR2 memory, and multiple RF SoCs using independent LDOs and bucks. Use Value: I²C-configurable startup sequence synchronizes power-up of co-processor domains, preventing bus contention during boot. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PMIC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC34PF1550A3EP | Preprogrammed for i.MX 6UL with DDR3L memory; different VREFDDR target (0.75 V vs. 0.675 V for LPDDR2) | Requires DDR3L-compatible layout; not suitable for LPDDR2 timing or voltage profiles | Select only if migrating from DDR3L-based i.MX 6UL design; verify VREFDDR accuracy and startup timing against LPDDR2 spec |
| MC34PF1550A6EP | Optimized for i.MX 6ULL with DDR3L; lacks LPDDR2-specific VREFDDR calibration and SWx DVS mapping for 6UL | Designed for lower-power 6ULL SoC; incompatible with 6UL's memory controller voltage sequencing | Not recommended for i.MX 6UL + LPDDR2 systems; may cause DDR initialization failure or reduced margin |
Compared with MC34PF1550A3EP and MC34PF1550A6EP, the MC34PF1550A7EP uniquely supports LPDDR2's tighter 0.675 V VREFDDR tolerance and i.MX 6UL-specific power-up timing-ensuring reliable DDR initialization without firmware workarounds or hardware revisions.
Availability
MC34PF1550A7EP is available at Aetrix Electronics and suitable for smart wearables, industrial IoT gateways, and wireless game controllers requiring stable component supply, long-term lifecycle support, and guaranteed OTP configuration integrity.
Supply support for MC34PF1550A7EP 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 leader specializing in secure connectivity solutions for automotive, industrial, and IoT markets, with deep expertise in ARM-based application processors and associated power management.
The PF1550 product line was designed to deliver fully integrated, OTP-configurable power solutions for NXP's i.MX family-reducing BOM count, simplifying layout, and accelerating time-to-market for battery-powered edge devices.
FAQ
What is the primary application processor compatibility for the MC34PF1550A7EP?
The MC34PF1550A7EP is preprogrammed specifically for the i.MX 6UL application processor with LPDDR2 memory. Its OTP configuration (code A7) sets regulator voltages, startup timing, and VREFDDR output to match i.MX 6UL's boot requirements and LPDDR2 interface specifications-not interchangeable with DDR3L or LPDDR3 variants without validation.
Does the MC34PF1550A7EP support dynamic voltage scaling (DVS)?
Yes, the MC34PF1550A7EP supports DVS on buck converters SW1 and SW2 via I²C commands. This allows real-time adjustment of core and digital rail voltages during i.MX 6UL DVFS operation, improving energy efficiency in variable-workload applications such as voice-triggered wake-up or sensor fusion.
What battery charging parameters are programmable on the MC34PF1550A7EP?
The MC34PF1550A7EP supports programmable constant-current (100–1000 mA), constant-voltage (3.5–4.44 V), and charge termination current (5–50 mA) settings via I²C registers. All values are stored in OTP memory, ensuring consistent behavior across production units without runtime configuration.
How does the MC34PF1550A7EP handle thermal regulation during battery charging?
The MC34PF1550A7EP implements JEITA-compliant thermal regulation using its THM pin and internal thermistor bias (INT2P7). Three OTP-selectable thresholds (80 °C, 95 °C, 110 °C) reduce charge current progressively when battery temperature exceeds limits-preventing thermal runaway without external components.
Is the VREFDDR output on the MC34PF1550A7EP adjustable, and what is its accuracy?
Yes, the MC34PF1550A7EP provides VREFDDR output from 0.5 V to 0.9 V in 12.5 mV steps, with ±1 % accuracy over −40 °C to 105 °C. This precision meets JEDEC LPDDR2 requirements and ensures stable memory interface timing across operating conditions.
MC34PF1550A7EP 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)
MC34PF1550A7EP FAQ
1.How can I place an order for MC34PF1550A7EP through Aetrix?
Please submit a Request for Quotation (RFQ) for MC34PF1550A7EP 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 MC34PF1550A7EP reliable?
The price and inventory of MC34PF1550A7EP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC34PF1550A7EP is usually 5 days.
3.What payment methods are accepted for MC34PF1550A7EP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC34PF1550A7EP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC34PF1550A7EP?
MC34PF1550A7EP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC34PF1550A7EP 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 MC34PF1550A7EP?
For technical support, including MC34PF1550A7EP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC34PF1550A7EP requirements.
6.How does Aetrix verify that MC34PF1550A7EP is sourced from the original manufacturer or authorized distributors?
All MC34PF1550A7EP 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 MC34PF1550A7EP meets industry standards.
7.What is the process for return or replacement of MC34PF1550A7EP?
All MC34PF1550A7EP units undergo pre-shipment inspection (PSI). If there is an issue with MC34PF1550A7EP, 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 MC34PF1550A7EP part is unused and in its original packaging.
Return procedure for MC34PF1550A7EP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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