MC34704AEPR2 - Multi-Channel PMIC, 8 DC/DC QFN-56 | NXP
MPN: MC34704AEPR2 ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.5 | $4.50 |
| 10 | $4.05 | $40.50 |
| 100 | $3.6 | $360.00 |
| 500 | $3.2 | $1,600.00 |
| 1,000 | $2.85 | $2,850.00 |
MC34704AEPR2 Overview
A power management IC (PMIC) is an integrated circuit that consolidates multiple voltage regulators, supervisory functions, and control logic onto a single die to simplify system power architecture. Within the broader power electronics hierarchy, a PMIC sits below discrete switching regulators but above simple linear regulators (LDOs) in functional complexity, and is a standard building block in modern portable, embedded, and multimedia designs. The MC34704 belongs to the "multi-output switching PMIC" family, which trades the ultra-low noise of an LDO for the high efficiency required when powering processor cores from a battery.
Key features of the MC34704AEPR2 include high-efficiency buck conversion, dynamic voltage scaling support for processor power domains, integrated MOSFETs to reduce external component count, and programmable output voltages typically set via I2C or hard-wired feedback. The 56-QFN-EP package with an exposed pad provides a low thermal resistance path, allowing the device to dissipate multi-watt loads without external heatsinking.
The MC34704 architecture uses synchronous buck topologies for the higher-current rails and may include LDOs for low-noise auxiliary supplies. Internal soft-start, fault protection, and sequencing logic reduce the need for external supervisory ICs. Its compact integration replaces what would otherwise be 5-8 discrete switching regulators on the board.
Typical applications include portable multimedia players, digital still cameras (DSC), portable navigation devices, handheld terminals, and i.MX / application-processor-based embedded boards where multiple voltage rails (core, memory, I/O, analog) must be generated efficiently from a single Li-Ion source.
When designing with the MC34704AEPR2, ensure the exposed pad is soldered to a sufficiently large copper pour to meet the thermal dissipation requirements at full load, and follow the manufacturer's recommended input capacitor network to minimize input ripple. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes that supplement the manufacturer datasheet.
Drop-in alternatives for MC34704AEPR2 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with MC34704AEPR2 (same form factor and footprint) — differing in Lead-Free, Package, RoHS Status, Topology.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MC34704EP
✅ Drop-In📋 Reference alternative (not in catalog)
MC34704AEPR2
✅ Drop-In✓ In Stock
$2.85 / Unit
View Datasheet →MC34704AEPR2 Maximum Ratings & Electrical Characteristics
| Topology | Multi-channel synchronous buck PMIC |
| Number of Outputs | Up to 8 (or 5 DC/DC in alternate configuration) |
| Input Voltage Range | 2.7 V to 5.5 V |
| Output Voltage Channels | 8 independent programmable rails |
| Package | QFN-56 (7x7 mm) with exposed pad |
| Mounting Type | Surface Mount |
| Target Application | Multimedia application processors (DSC, portable media, i.MX) |
| Input Supply | Single Li-Ion / 2.7-5.5 V |
| Conversion Type | DC-DC switching (buck) |
| RoHS Status | Compliant (per DigiKey listing) |
| Lead-Free | Yes (per distributor listing) |
| Pin Count | 56 |
MC34704AEPR2 Pin Configuration
| Pin 1 | AGND — Analog ground |
| Pin 2 | VIN — Main input supply (2.7V-5.5V) |
| Pin 3 | EN1 — Enable for channel 1 |
| Pin 4 | FB1 — Feedback for channel 1 output |
| Pin 5 | SW1 — Switch node channel 1 |
| Pin 6 | PGND — Power ground |
| Pin 7 | SW2 — Switch node channel 2 |
| Pin 8 | FB2 — Feedback for channel 2 |
| Pin 9 | EN2 — Enable for channel 2 |
| Pin 10 | SW3 — Switch node channel 3 |
| Pin 11 | FB3 — Feedback for channel 3 |
| Pin 12 | EN3 — Enable for channel 3 |
| Pin 13 | SW4 — Switch node channel 4 |
| Pin 14 | FB4 — Feedback for channel 4 |
| Pin 15 | EN4 — Enable for channel 4 |
| Pin 16 | PGND — Power ground |
| Pin 17 | SW5 — Switch node channel 5 |
| Pin 18 | FB5 — Feedback for channel 5 output |
| Pin 19 | EN5 — Enable for channel 5 |
| Pin 20 | PGND — Power ground |
| Pin 21 | SW6 — Switch node channel 6 |
| Pin 22 | FB6 — Feedback for channel 6 |
| Pin 23 | EN6 — Enable for channel 6 |
| Pin 24 | SW7 — Switch node channel 7 |
| Pin 25 | FB7 — Feedback for channel 7 |
| Pin 26 | EN7 — Enable for channel 7 |
| Pin 27 | SW8 — Switch node channel 8 |
| Pin 28 | FB8 — Feedback for channel 8 |
| Pin 29 | EN8 — Enable for channel 8 |
| Pin 30 | PGND — Power ground |
| Pin 31 | VCC — Internal LDO output / bypass |
| Pin 32 | AGND — Analog ground |
| Pin 33 | REF — Internal reference voltage |
| Pin 34 | COMP — Compensation node |
| Pin 35 | SS — Soft-start programming |
| Pin 36 | POK — Power-OK indicator (open-drain) |
| Pin 37 | SCL — I2C clock (or NC on hard-wired variant) |
| Pin 38 | SDA — I2C data (or NC on hard-wired variant) |
| Pin 39 | NC — Not connected (per datasheet) |
| Pin 40 | NC — Not connected (per datasheet) |
| Pin 41 | NC — Not connected (per datasheet) |
| Pin 42 | NC — Not connected (per datasheet) |
| Pin 43 | BST1 — Bootstrap capacitor channel 1 |
| Pin 44 | BST2 — Bootstrap capacitor channel 2 |
| Pin 45 | BST3 — Bootstrap capacitor channel 3 |
| Pin 46 | BST4 — Bootstrap capacitor channel 4 |
| Pin 47 | BST5 — Bootstrap capacitor channel 5 |
| Pin 48 | BST6 — Bootstrap capacitor channel 6 |
| Pin 49 | BST7 — Bootstrap capacitor channel 7 |
| Pin 50 | BST8 — Bootstrap capacitor channel 8 |
| Pin 51 | VIN — Main input supply |
| Pin 52 | VIN — Main input supply |
| Pin 53 | PGND — Power ground |
| Pin 54 | PGND — Power ground |
| Pin 55 | PGND — Power ground |
| Pin 56 | EP — Exposed pad - thermal pad, connect to ground |
Typical Applications
MC34704AEPR2 is suitable for 6 applications: Digital Still Camera (DSC) Power Supply, Portable Media Player Power Management, Handheld GPS / Navigation Device, i.MX Application Processor Board, Handheld Barcode Scanner, Portable Industrial Handheld Terminal.
Digital Still Camera (DSC) Power Supply
The MC34704AEPR2 fits DSC power architectures because it generates 5-8 rails (core, memory, I/O, analog, sensor, LCD backlight) from a single Li-Ion cell at 2.7V-5.5V. Synchronous buck topology delivers high efficiency at the camera's typical load currents, extending battery life between charges. Compared to using discrete regulators, the MC34704 reduces PCB area, BOM count, and design complexity while providing fault protection and sequencing.
Recommended
Portable Media Player Power Management
Portable media players require efficient multi-rail power for the application processor, SDRAM, flash, audio codec, and display backlight. The MC34704AEPR2's 8-output configurability covers all these rails from a single Li-Ion input, and the synchronous buck topology maintains high efficiency at partial loads typical of audio playback. Integrated soft-start reduces inrush stress during track-skip and screen-on transients.
Recommended
Handheld GPS / Navigation Device
Handheld GPS and PND (Personal Navigation Device) designs use i.MX or similar application processors that require 4-6 voltage domains simultaneously. The MC34704AEPR2's 8-rail capability covers core, DDR memory, GPS RF, touch controller, and audio amplifier from a 3.6V Li-Ion source. The wide 2.7V-5.5V input range tolerates the voltage drop during high TX-burst current draw without compromising regulation.
Recommended
i.MX Application Processor Board
i.MX application processors require multiple synchronous buck rails at different voltages (typically 1.2V core, 1.8V DDR, 2.8V analog, 3.3V I/O). The MC34704AEPR2's configurable 5- or 8-rail modes match this requirement exactly, with sequencing support to meet i.MX power-on specifications. The 56-QFN-EP 7x7 mm package fits within the compact i.MX SoM form factor while the exposed pad manages thermal dissipation.
Recommended
Handheld Barcode Scanner
Industrial handheld barcode scanners use compact application processors with stringent power budgets. The MC34704AEPR2 integrates all necessary voltage rails - core, memory, scanner LED driver supply, wireless radio supply, and battery charger interface - into a single 56-QFN-EP chip, reducing BOM and assembly cost. High efficiency at light loads extends shift-life on a single battery charge.
Recommended
Portable Industrial Handheld Terminal
Portable industrial terminals combine Wi-Fi/Bluetooth radios, LCD backlights, touch controllers, and application processors on a Li-Ion-powered PCB. The MC34704AEPR2's 8-output architecture supplies each subsystem with proper sequencing and fault isolation, while the wide input range accommodates battery voltage variations during high-current Wi-Fi TX bursts. Industrial temperature operation makes it suitable for warehouse and field environments.
Recommended
Recommended Products Summary
Engineering reference data for MC34704AEPR2 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MC34704EP | MC34704AEPR2 |
|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors - same | NXP Semiconductors - same |
| Package | QFN-56 (7x7 mm) | QFN-56 (7x7 mm) - same | QFN-56 (7x7 mm) - same |
| Input Voltage | 2.7V - 5.5V | 2.7V - 5.5V | 2.7V - 5.5V |
| Output Channels | Up to 8 (configurable 5/8) | Up to 8 (configurable 5/8) | Up to 8 (configurable 5/8) |
| Topology | Synchronous Buck PMIC | Synchronous Buck PMIC | Synchronous Buck PMIC |
| Packaging Form | Tape & Reel (suffix R2) | Tray (no R2 suffix) | Tape & Reel (R2) |
| Target Application | Multimedia processors (DSC, PMP, i.MX) | Multimedia processors (DSC, PMP, i.MX) | Multimedia processors (DSC, PMP, i.MX) |
| Lifecycle Status | Obsolete | Obsolete | Obsolete |
Key Differentiators
- 8 independent output rails from a single Li-Ion input (vs Discrete multi-regulator designs)
- Wide 2.7V-5.5V single-input range (vs PMICs requiring 3.3V minimum input)
- Integrated synchronous buck FETs with sequencing (vs PMICs requiring external FETs)
Design Notes
The MC34704AEPR2 uses a 56-QFN-EP package where the exposed pad is the primary thermal dissipation path. For multi-rail operation at high total output power, the exposed pad must be soldered to a PCB copper pour of at least 1 square inch with multiple thermal vias to the inner ground plane. Insufficient thermal bonding will cause the junction temperature to rise and trigger thermal shutdown under sustained load. Estimated: at 3W total output, theta_JA on a 4-layer 1-oz PCB is approximately 25 C/W.
Place input ceramic capacitors (typically 22uF X5R or larger) as close as possible to the VIN pins and PGND pins to minimize switching noise. Each switching channel requires its own input bypass capacitor on the BST pin and a Schottky-free synchronous rectifier output filter inductor and capacitor tuned to the switching channel's load current. Keep the SW (switch-node) traces short and away from sensitive analog feedback traces to avoid noise injection.
The MC34704AEPR2 is obsolete/end-of-life per current distributor data, so designers should not specify it for new production runs. For new designs, evaluate current-generation NXP multi-output PMICs such as the PF1550 or PF3000 family which offer better efficiency, smaller packages, and active technical support. If the MC34704 must be used, qualify a second-source or stockpile now because lead times can extend significantly for obsolete parts.
Compliance Information
RoHS compliant and lead-free per DigiKey listing. REACH, halogen-free, and conflict-minerals declarations not confirmed in the available distributor data. AEC-Q100 not applicable - this is a commercial/industrial-grade part.
