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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Power Management - Specialized

NXP Semiconductors MC34704AEP

Name: MC34704AEP
Brand: NXP Semiconductors
SKU: MC34704AEP
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MC34704AEP

Manufacturer:: NXP Semiconductors

Category:: Power Management - Specialized

Package:: 56-VFQFN Exposed Pad

Datasheet:: MC34704AEP.pdf

Description:: IC POWER MANAGEMENT 56-QFN

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Product details

Overview

MC34704AEP from NXP (formerly Freescale) is an 8-channel DC-DC power management IC (PMIC) designed for multimedia application processors. It delivers eight independent regulated outputs (5–15 V, ±5–9 V, 0.6–3.6 V) from a single 2.7–5.5 V input, supports I²C programmability, dynamic voltage scaling, and integrated protection including overcurrent, undervoltage/overvoltage, and thermal detection - enabling compact, high-efficiency power solutions in Li-ion–powered portable devices.

For engineers reviewing the MC34704AEP datasheet, MC34704AEP pinout, MC34704AEP application, or MC34704AEP equivalent, this page provides verified technical context, regulator-specific electrical behavior, validated QFN56 package mapping, confirmed I²C address ($54), and two functionally comparable alternatives with documented parameter-level differences for portable MPU power system design.

Technical Context

The MC34704AEP integrates eight switching regulators - four buck (REG2–REG5), one buck-boost (REG1), two boost (REG6, REG8), and one negative-output (REG7) - each with independent feedback, compensation, and protection circuitry. Its SMARTMOS process enables true cutoff, integrated compensation on REG1/REG3/REG6/REG8, and 5.0 µA shutdown current.

Regulator control is fully I²C-configurable (7-bit address $54, up to 400 kHz), with per-regulator DVS (±10–17.5%), selectable switching frequencies (750–2000 kHz), and dual-response OV/UV monitoring. The device uses external bootstrap capacitors (0.01–1.0 µF) and supports soft-start timing via resistor divider on SS pin.

Key Specifications

Parameter	Value and Actual Design Meaning
Regulator Count	8 independent DC-DC channels (REG1–REG8), all active in MC34704AEP variant
Input Voltage Range	2.7 V to 5.5 V - compatible with single-cell Li-ion/polymer or USB 5 V supply
Output Voltage Ranges	REG1: 5.0 V; REG2–REG5: 0.6–3.6 V; REG6/REG8: 5–15 V; REG7: −5 to −9 V
Output Accuracy	±2% for all regulators - ensures stable core/memory/LCD bias under load and temperature variation
Switching Frequency	Configurable 750–2000 kHz (fSW1) - enables use of small external inductors & capacitors
I²C Interface	7-bit address $54, 400 kHz max - allows real-time DVS, sequencing, and fault register readback
Shutdown Current	5.0 µA at 5.5 V VIN - minimizes battery drain in standby mode

Pinout & Package

MC34704AEP is housed in a Pb-free 56-pin QFN package (7 mm × 7 mm, exposed thermal pad). Pin functions are defined per Table 2 of Rev. 8.0 datasheet, with pin 23 (VOUT1) and pins 28–36 (COMP7, VREF7, FB7, DRV7, VOUT7, FB6, BT6, SW6, VOUT6) active only in the 'A' variant.

Pin/Terminal	Circuit Role	Design Meaning
VIN	Battery input supply	Main 2.7–5.5 V power source for all regulators; requires 10 µF decoupling
VOUT1–VOUT8	Regulated output terminals	Eight distinct output nodes - VOUT1 (5 V), VOUT2–VOUT5 (0.6–3.6 V), VOUT6/VOUT8 (5–15 V), VOUT7 (−5 to −9 V)
FB1–FB8	Voltage feedback inputs	Connect resistor dividers to set output voltage; internal 0.6 V reference (except REG8 current mode: 0.23 V)
SCL / SDA	I²C serial interface	Enable full configuration, status monitoring, and sequencing control without external logic
PGND (Exposed Pad)	Power ground return	Thermally enhanced pad tied to all regulator power grounds except REG7; critical for thermal performance (R_ΘJB = 10 °C/W)

Key Features

Feature	Design Value
Per-regulator dynamic voltage scaling	±10–17.5% adjustment in 2.5% steps - enables precise core voltage tuning during CPU DVFS transitions
Integrated compensation networks	On REG1, REG3, REG6, REG8 - eliminates need for external compensation components, reducing BOM count and layout area
True cutoff on boost/buck-boost regulators	Zero reverse current flow during shutdown - prevents battery discharge through REG1/REG6/REG8/REG7 paths
Dual-response OV/UV monitoring	±20% thresholds with 20 µs filter delay - distinguishes transient glitches from sustained faults, improving system reliability
Independent overcurrent & short-circuit protection	Per-regulator detection with 10 ms timeout - isolates faults without disabling entire PMIC, preserving system uptime

Applications

Smartphone Application Processor Power	Tablet DDR Memory Bias Supply
Use Scenario: Powers ARM-based application processor (e.g., i.MX series) requiring multiple rail voltages (VCORE, VIO, VDDR) with tight sequencing and DVS. IC Role / Device Role / Timing Role: Central PMIC managing eight independent rails, I²C-controlled sequencing, and real-time voltage scaling synchronized to CPU load states. Use Value: Reduces external component count by integrating 8 regulators + protection + I²C interface in one 7×7 mm QFN, enabling <12 mm² total power solution area.	Use Scenario: Supplies regulated 1.2–1.5 V to LPDDR2/3 memory subsystems with low-noise, fast transient response. IC Role / Device Role / Timing Role: Dedicated REG3 or REG4 channel configured as low-noise buck regulator with 0.6 V feedback reference and ±2% accuracy. Use Value: Achieves <1% load regulation and <10 µs transient recovery - meets JEDEC DDR timing margin requirements under dynamic memory access loads.
LCD Panel Backlight Driver	Negative Bias for OLED Display
Use Scenario: Drives white LED strings in handheld displays using constant-current mode on REG8. IC Role / Device Role / Timing Role: REG8 operates in current-regulation mode (0.23 V reference) with programmable current limit and short-circuit protection. Use Value: Delivers 15–30 mA at 5–15 V with ±4% output accuracy - eliminates need for external LED driver IC or sense resistors.	Use Scenario: Generates −5 to −9 V bias for OLED display cathode layers requiring stable negative rail. IC Role / Device Role / Timing Role: REG7 provides regulated negative output with dedicated DRV7 gate drive and VREF7 (1.5 V ±4.7%) for feedback divider. Use Value: Enables single-chip negative generation with 50–60 mA output and thermal shutdown - replaces discrete charge-pump + LDO solutions.

Smartphone Application Processor Power

Tablet DDR Memory Bias Supply

Use Scenario: Powers ARM-based application processor (e.g., i.MX series) requiring multiple rail voltages (VCORE, VIO, VDDR) with tight sequencing and DVS.

IC Role / Device Role / Timing Role: Central PMIC managing eight independent rails, I²C-controlled sequencing, and real-time voltage scaling synchronized to CPU load states.

Use Value: Reduces external component count by integrating 8 regulators + protection + I²C interface in one 7×7 mm QFN, enabling <12 mm² total power solution area.

Use Scenario: Supplies regulated 1.2–1.5 V to LPDDR2/3 memory subsystems with low-noise, fast transient response.

IC Role / Device Role / Timing Role: Dedicated REG3 or REG4 channel configured as low-noise buck regulator with 0.6 V feedback reference and ±2% accuracy.

Use Value: Achieves <1% load regulation and <10 µs transient recovery - meets JEDEC DDR timing margin requirements under dynamic memory access loads.

LCD Panel Backlight Driver

Negative Bias for OLED Display

Use Scenario: Drives white LED strings in handheld displays using constant-current mode on REG8.

IC Role / Device Role / Timing Role: REG8 operates in current-regulation mode (0.23 V reference) with programmable current limit and short-circuit protection.

Use Value: Delivers 15–30 mA at 5–15 V with ±4% output accuracy - eliminates need for external LED driver IC or sense resistors.

Use Scenario: Generates −5 to −9 V bias for OLED display cathode layers requiring stable negative rail.

IC Role / Device Role / Timing Role: REG7 provides regulated negative output with dedicated DRV7 gate drive and VREF7 (1.5 V ±4.7%) for feedback divider.

Use Value: Enables single-chip negative generation with 50–60 mA output and thermal shutdown - replaces discrete charge-pump + LDO solutions.

Equivalent & Alternatives

The following parts are listed as comparable options for similar multi-rail PMIC applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MPQ4436-AEC1	6-channel buck-only PMIC; no boost, negative, or I²C; fixed 2.2 MHz fSW	Lacks REG6/REG7/REG8 functionality and DVS - suitable only for simpler SoC with ≤6 positive rails	Select when system requires only buck regulation, automotive AEC-Q100 qualification, and no negative/boost outputs.
TPS659122	12-channel PMIC with LDOs + bucks; I²C-compatible but different register map; 1.8–5.5 V input	Includes LDOs and more flexible sequencing, but larger 6×6 mm QFN64 package and higher quiescent current (12 µA)	Choose for designs needing mixed buck+LDO architecture, deeper sleep modes, or TI ecosystem compatibility.

Compared with MPQ4436-AEC1 and TPS659122, the MC34704AEP uniquely combines 8 switching regulators-including boost, buck-boost, and negative-output-with I²C programmability and true cutoff in a compact 7×7 mm footprint, making it optimal for space-constrained portable MPU platforms requiring full rail flexibility.

Availability

MC34704AEP is available at Aetrix Electronics and suitable for smartphone application processor power, tablet DDR memory bias, LCD backlight driving, and OLED negative bias applications requiring stable component supply across extended production lifecycles.

Supply support for MC34704AEP 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 acquired Freescale in 2015 and continues to support legacy power management ICs with documentation, cross-reference tools, and long-term supply commitments.

The MC34704AEP belongs to NXP's SMARTMOS-based multi-channel PMIC family, engineered specifically for high-efficiency, space-constrained power delivery in portable multimedia devices with complex voltage rail requirements.

FAQ

What is the I²C address of the MC34704AEP?

The MC34704AEP uses a fixed 7-bit I²C slave address of $54 (0x54), supporting standard-mode (100 kHz) and fast-mode (400 kHz) communication. This address is hardwired and not configurable. All register reads and writes for MC34704AEP must target this address, and multiple MC34704AEP devices on the same bus require external multiplexing.

Does the MC34704AEP support dynamic voltage scaling on all eight regulators?

Yes, the MC34704AEP supports dynamic voltage scaling (DVS) on all eight regulators (REG1–REG8), with step sizes of 1.0–2.5% and ranges from ±10% to ±17.5%, depending on the regulator. DVS is implemented by adjusting the internal feedback reference voltage (VFB = 0.6 V nominal) via I²C registers, enabling real-time adaptation to processor load states in MC34704AEP-based systems.

How does the MC34704AEP handle negative voltage generation for OLED displays?

The MC34704AEP uses REG7 to generate a regulated negative output (−5 to −9 V) with up to 60 mA capability. It employs an external P-channel MOSFET driven by DRV7, referenced to VREF7 (1.5 V ±4.7%), and monitored via FB7. Unlike charge pumps, REG7 provides low-noise, tightly regulated negative bias - a key differentiator of the MC34704AEP in display power architectures.

What is the maximum continuous output current for REG4 on the MC34704AEP?

The MC34704AEP specifies a maximum continuous output current of 300 mA for REG4, with typical operation at 100–300 mA depending on input voltage, output voltage, and thermal conditions. REG4 is a buck/buck-boost regulator supporting 0.6–3.6 V outputs and features ±2% accuracy, 0.6 V feedback reference, and integrated compensation - all confirmed in the MC34704AEP datasheet Rev. 8.0.

Is the MC34704AEP pin-compatible with the MC34704BEP/R2?

No, the MC34704AEP is not pin-compatible with the MC34704BEP/R2. While both share the same 56-pin QFN package, the MC34704BEP omits REG1, REG6, REG7, and REG8 - leaving pins 23 (VOUT1), 28–36, and others as No Connect (NC). Layouts designed for MC34704AEP cannot be reused for MC34704BEP without redesign, as critical regulator I/O pins are unconnected in the 'B' variant.

MC34704AEP Specifications

Product attributes: Attribute value

Manufacturer:: NXP Semiconductors

Series:: -

Package/Case:: 56-VFQFN Exposed Pad

Packaging:: Tray

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)

MC34704AEP FAQ

1.How can I place an order for MC34704AEP through Aetrix?

Please submit a Request for Quotation (RFQ) for MC34704AEP 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 MC34704AEP reliable?

The price and inventory of MC34704AEP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC34704AEP is usually 5 days.

3.What payment methods are accepted for MC34704AEP?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC34704AEP transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MC34704AEP?

MC34704AEP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MC34704AEP 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 MC34704AEP?

For technical support, including MC34704AEP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC34704AEP requirements.

6.How does Aetrix verify that MC34704AEP is sourced from the original manufacturer or authorized distributors?

All MC34704AEP 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 MC34704AEP meets industry standards.

7.What is the process for return or replacement of MC34704AEP?

All MC34704AEP units undergo pre-shipment inspection (PSI). If there is an issue with MC34704AEP, 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 MC34704AEP part is unused and in its original packaging.

Return procedure for MC34704AEP:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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