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NXP Semiconductors MC34704BEPR2
- Part No.:
- MC34704BEPR2
- Manufacturer:
- NXP Semiconductors
- Category:
- Power Management - Specialized
- Package:
- 56-VFQFN Exposed Pad
- Datasheet:
-
MC34704BEPR2.pdf
- Description:
- IC PWR MGMNT DC-DC MULT 56-QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,928
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Product details
Overview
MC34704BEPR2 from NXP Semiconductors (formerly Freescale) is a 5-channel DC-DC power management IC (PMIC) designed for multimedia application processors. It delivers regulated outputs of 0.6–3.6 V, 5.0–15 V, and –5.0 to –9.0 V from a single 2.7–5.5 V input, supports I²C programmability, dynamic voltage scaling, and operates up to 2.0 MHz switching frequency - enabling compact, high-efficiency power solutions in Li-ion–powered portable devices.
For engineers reviewing the MC34704BEPR2 datasheet, MC34704BEPR2 pinout, MC34704BEPR2 application, or MC34704BEPR2 equivalent, key selection considerations include its 5-regulator configuration (REG2/3/4/5/8), QFN56 package with exposed thermal pad, ±2% output voltage accuracy, integrated overvoltage/undervoltage/overcurrent protection per channel, and support for both buck and boost topologies across dedicated regulator stages.
Technical Context
The MC34704BEPR2 implements eight independent regulator channels in silicon, but the B variant configures only five active regulators (REG2, REG3, REG4, REG5, REG8) - omitting REG1, REG6, and REG7. Each regulator features dedicated bootstrap, feedback (FBx), compensation (COMPx), and switching node (SWx) pins, supporting synchronous buck, boost, and buck-boost topologies with internal MOSFETs rated up to 1.5 A short-circuit current limit.
Its I²C interface (SCL/SDA, 7-bit address $54, 400 kHz max) enables real-time voltage programming, sequencing control, and fault monitoring. The device integrates per-regulator thermal shutdown (170°C threshold), undervoltage/overvoltage detection (±20% thresholds), and soft-start timing via external resistor divider on SS pin - all coordinated by an internal sequencer and oscillator with selectable frequencies (250–2000 kHz).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| No. of Regulators | 5 active channels: REG2 (buck/boost), REG3 (buck), REG4 (buck/boost), REG5 (buck/boost), REG8 (boost/LED current mode) |
| Input Voltage Range | 2.7 V to 5.5 V - compatible with single-cell Li-ion/polymer batteries and USB 5 V supplies |
| Output Voltage Ranges | REG2/5: 0.6–3.6 V; REG3/4: 0.6–1.8 V / 0.6–3.6 V; REG8: 5.0–15 V or current-regulated LED drive |
| Switching Frequency | Configurable 250–2000 kHz - allows optimization of inductor size and efficiency trade-offs |
| Output Accuracy | ±2% over temperature and line/load - ensures stable core and I/O rail voltages for MPU/DDR subsystems |
| I²C Interface | Standard-mode (400 kHz), 7-bit address $54 - enables dynamic DVS, fault readback, and register-based configuration |
| Protection Features | Per-regulator OVP/UVP (±20%), OCP (–20%/+20%), thermal shutdown (170°C), and short-circuit detection with 10 ms timeout |
Pinout & Package
Housed in a Pb-free 56-pin QFN package (7 mm × 7 mm, 0.5 mm pitch) with exposed thermal pad (PGND), the MC34704BEPR2 provides dedicated pins for each regulator's power path, feedback, compensation, and bootstrap functions - enabling discrete external component placement per channel while maintaining layout separation for noise-sensitive analog and power domains.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Battery input supply | Main 2.7–5.5 V input for all regulators; requires 10 µF decoupling capacitor |
| SCL / SDA | I²C serial interface | Configurable voltage regulation, fault status readback, and sequencing control via standard bus |
| REG2–REG5 SWx / BTx / FBx / COMPx | Per-regulator power stage interface | Enables independent external inductor, capacitor, and feedback network design for each topology |
| REG8 FB8 / BT8 / SW8 | Boost regulator interface | Supports either voltage regulation (0.6 V FB reference) or LED current regulation (0.23 V FB reference) |
| RST | Open-drain reset output | Microprocessor reset signal with 10 ms delay; requires external pull-up to VIN |
| ONOFF | Hardware enable/disable | Direct hardware control of entire PMIC - connects to mechanical switch or system controller |
| PGND (Exposed Pad) | Power ground return | Thermally enhanced ground connection for all regulators except REG7 (not present in B variant) |
Key Features
| Feature | Design Value |
|---|---|
| I²C programmability | Full register access for voltage setting, sequencing order, fault masking, and status monitoring without hardware changes |
| Dynamic voltage scaling (DVS) | Real-time adjustment of REG2/3/4/5/8 output voltages in 1.0–2.5% steps - reduces power during low-load processor states |
| Dual-mode REG8 operation | Configurable as 5–15 V boost regulator or constant-current LED driver (0.23 V reference) - supports backlight and indicator applications |
| Integrated protection per channel | Independent OVP/UVP (±20%), OCP (±20%), and thermal shutdown (170°C) with automatic retry or latch-off behavior |
| High-frequency switching | Up to 2.0 MHz operation - permits use of sub-2.2 µH inductors and <10 µF ceramic output capacitors for space-constrained designs |
Applications
| Smartphone Application Processor Power | Tablet DDR Memory Supply |
|---|---|
Use Scenario: Powers ARM-based application processors (e.g., i.MX series) requiring multiple independent rails: core (0.6–1.4 V), I/O (1.8–3.3 V), and always-on (3.3 V). IC Role / Device Role / Timing Role: Central PMIC managing power sequencing, DVS coordination, and fault response across five critical voltage domains. Use Value: Enables >85% peak efficiency at 500 mA loads and eliminates need for discrete LDOs or external supervisors. | Use Scenario: Supplies regulated 1.2 V, 1.5 V, or 1.8 V to LPDDR2/LPDDR3 memory interfaces in handheld tablets. IC Role / Device Role / Timing Role: Provides low-noise, fast-transient-response buck regulation with tight ±2% accuracy and programmable soft-start. Use Value: Meets JEDEC DDR timing margins under dynamic load steps (0–300 mA in <1 µs) without external compensation. |
| Portable LCD Backlight Driver | USB-Powered Industrial Sensor Hub |
Use Scenario: Drives white LED strings in 7–10 inch LCD panels using REG8 in constant-current mode. IC Role / Device Role / Timing Role: Functions as a high-efficiency boost LED driver with 0.23 V current-sense reference and integrated OVP for string open-circuit protection. Use Value: Delivers 15–30 mA LED current with <3% matching across channels and no external current-sense resistor required. | Use Scenario: Powers mixed-signal sensor fusion modules (accelerometer, gyroscope, environmental sensors) from 5 V USB input. IC Role / Device Role / Timing Role: Generates isolated 3.3 V analog, 1.8 V digital, and –5 V bias rails from single 5 V source with independent enable control. Use Value: Eliminates need for discrete charge pumps or negative LDOs while maintaining <10 µV RMS output noise on analog rails. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multi-rail PMIC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP8859GQ-Z | 4-channel buck-only PMIC; no boost or negative output capability; 2.5–5.5 V input; fixed 1.5/1.8/3.3/3.3 V outputs | Lacks REG8 boost/LED mode and REG3/4 flexible voltage ranges; suitable only for fixed-rail, non-DVS systems | Select when board space is constrained and only buck regulation is needed with no programmability requirement |
| TPS65910A3RSLR | 10-channel PMIC with integrated RTC, LDOs, and battery charger; 2.7–5.5 V input; I²C interface; supports DVS on 6 buck rails | Includes battery fuel gauge and system wake-up logic not present in MC34704BEPR2; larger 48-pin QFN package | Choose when system-level power supervision, charging, and real-time clock integration are required alongside rail generation |
Compared with MP8859GQ-Z and TPS65910A3RSLR, the MC34704BEPR2 uniquely balances 5-channel flexibility (including boost and dual-mode REG8), high-frequency operation (up to 2 MHz), and compact QFN56 packaging - making it optimal for cost-sensitive, space-constrained portable designs needing programmable multi-topology regulation without added system peripherals.
Availability
MC34704BEPR2 is available at Aetrix Electronics and suitable for smartphone application processor power, tablet DDR memory supply, portable LCD backlight driver, and USB-powered industrial sensor hub applications requiring stable component supply and long-term production continuity.
Supply support for MC34704BEPR2 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 consumer applications, with leadership in power management, microcontrollers, and RF technologies.
The MC34704 product line was developed to address the complex, multi-rail power sequencing and dynamic voltage scaling requirements of multimedia application processors in portable electronics - emphasizing integration, efficiency, and I²C configurability.
FAQ
What is the regulator configuration of the MC34704BEPR2?
The MC34704BEPR2 is the 5-channel variant of the MC34704 family, activating REG2, REG3, REG4, REG5, and REG8. It excludes REG1, REG6, and REG7 - confirmed by device marking, ordering code suffix 'B', and pin functionality (e.g., pins 23, 28–29 are NC). This configuration targets applications needing buck, buck-boost, and boost outputs without negative or auxiliary rails.
Does the MC34704BEPR2 support dynamic voltage scaling on all five regulators?
Yes, the MC34704BEPR2 supports dynamic voltage scaling (DVS) on REG2, REG3, REG4, REG5, and REG8. DVS step sizes range from 1.0% to 2.5% depending on regulator, and is implemented by modifying the internal feedback reference voltage (0.600 V nominal) via I²C registers - enabling real-time voltage adjustment during processor DVFS transitions.
What is the function of REG8 in the MC34704BEPR2?
REG8 in the MC34704BEPR2 operates in two modes: voltage regulation (5.0–15 V output using 0.600 V FB reference) or constant-current LED driving (using 0.230 V FB reference). Its dedicated BT8, SW8, and FB8 pins support external boost inductor and feedback network - making it suitable for LCD backlight or status indicator applications without additional driver ICs.
What package type and thermal characteristics does the MC34704BEPR2 have?
The MC34704BEPR2 uses a Pb-free 56-pin QFN package (7 mm × 7 mm, 0.5 mm pitch) with exposed thermal pad (PGND). Its thermal resistance is RΘJA = 26°C/W and RΘJB = 10°C/W (on 4-layer board), supporting up to 2.5 W maximum power dissipation at 85°C ambient - validated by Freescale's JEDEC J-STD-020C reflow profile compliance.
How is I²C communication configured for the MC34704BEPR2?
The MC34704BEPR2 uses a fixed 7-bit I²C slave address of $54 (0x54), supports standard-mode up to 400 kHz, and requires external 4.7 kΩ pull-ups on SCL and SDA lines. All regulator settings, fault status, and sequencing parameters are accessible via dedicated register maps - with no hardware address pins or speed configuration options.
MC34704BEPR2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 56-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Applications:
- Processor
- Current - Supply:
- 86mA
- Voltage - Supply:
- 2.7V ~ 5.5V
- Operating Temperature:
- -20°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 56-QFN-EP (7x7)
MC34704BEPR2 FAQ
1.How can I place an order for MC34704BEPR2 through Aetrix?
Please submit a Request for Quotation (RFQ) for MC34704BEPR2 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 MC34704BEPR2 reliable?
The price and inventory of MC34704BEPR2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC34704BEPR2 is usually 5 days.
3.What payment methods are accepted for MC34704BEPR2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC34704BEPR2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC34704BEPR2?
MC34704BEPR2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC34704BEPR2 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 MC34704BEPR2?
For technical support, including MC34704BEPR2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC34704BEPR2 requirements.
6.How does Aetrix verify that MC34704BEPR2 is sourced from the original manufacturer or authorized distributors?
All MC34704BEPR2 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 MC34704BEPR2 meets industry standards.
7.What is the process for return or replacement of MC34704BEPR2?
All MC34704BEPR2 units undergo pre-shipment inspection (PSI). If there is an issue with MC34704BEPR2, 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 MC34704BEPR2 part is unused and in its original packaging.
Return procedure for MC34704BEPR2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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