MC34704AEPR2 - Multi-Channel PMIC, 8 DC/DC QFN-56 | NXP
MPN: MC34704AEPR2 ✗ پایان تولیدMC34704AEPR2 نمای کلی
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.
جایگزین‌های drop-in برای MC34704AEPR2 — همان پکیج، سازگار پین‌به‌پین. قطعات با پکیج متفاوت که نیاز به تغییر PCB دارند مستثنی هستند.
گونه‌ها در این سری
مدل‌های هم‌سری که جایگزین مستقیم هستند برای MC34704AEPR2 (همان فرم‌فاکتور و فوت‌پرینت) — متفاوت در Lead-Free, Package, RoHS Status, Topology.
MC34704EP
✅ جایگزین مستقیم📋 جایگزین مرجع (خارج از کاتالوگ)
MC34704AEPR2
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←MC34704AEPR2 حداکثر مقادیر مجاز و مشخصات الکتریکی
| توپولوژی | Multi-channel synchronous buck PMIC |
| تعداد خروجی‌ها | Up to 8 (or 5 DC/DC in alternate configuration) |
| محدوده ولتاژ ورودی | 2.7 V to 5.5 V |
| Output Voltage Channels | 8 independent programmable rails |
| بسته‌بندی | QFN-56 (7x7 mm) with exposed pad |
| نوع نصب | 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) |
| وضعیت RoHS | Compliant (per DigiKey listing) |
| Lead-Free | Yes (per distributor listing) |
| تعداد پایه | 56 |
پیکربندی پین MC34704AEPR2
| پین 1 | AGND — Analog ground |
| پین 2 | VIN — Main input supply (2.7V-5.5V) |
| پین 3 | EN1 — Enable for channel 1 |
| پین 4 | FB1 — Feedback for channel 1 output |
| پین 5 | SW1 — Switch node channel 1 |
| پین 6 | PGND — Power ground |
| پین 7 | SW2 — Switch node channel 2 |
| پین 8 | FB2 — Feedback for channel 2 |
| پین 9 | EN2 — Enable for channel 2 |
| پین 10 | SW3 — Switch node channel 3 |
| پین 11 | FB3 — Feedback for channel 3 |
| پین 12 | EN3 — Enable for channel 3 |
| پین 13 | SW4 — Switch node channel 4 |
| پین 14 | FB4 — Feedback for channel 4 |
| پین 15 | EN4 — Enable for channel 4 |
| پین 16 | PGND — Power ground |
| پین 17 | SW5 — Switch node channel 5 |
| پین 18 | FB5 — Feedback for channel 5 output |
| پین 19 | EN5 — Enable for channel 5 |
| پین 20 | PGND — Power ground |
| پین 21 | SW6 — Switch node channel 6 |
| پین 22 | FB6 — Feedback for channel 6 |
| پین 23 | EN6 — Enable for channel 6 |
| پین 24 | SW7 — Switch node channel 7 |
| پین 25 | FB7 — Feedback for channel 7 |
| پین 26 | EN7 — Enable for channel 7 |
| پین 27 | SW8 — Switch node channel 8 |
| پین 28 | FB8 — Feedback for channel 8 |
| پین 29 | EN8 — Enable for channel 8 |
| پین 30 | PGND — Power ground |
| پین 31 | VCC — Internal LDO output / bypass |
| پین 32 | AGND — Analog ground |
| پین 33 | REF — Internal reference voltage |
| پین 34 | COMP — Compensation node |
| پین 35 | SS — Soft-start programming |
| پین 36 | POK — Power-OK indicator (open-drain) |
| پین 37 | SCL — I2C clock (or NC on hard-wired variant) |
| پین 38 | SDA — I2C data (or NC on hard-wired variant) |
| پین 39 | NC — Not connected (per datasheet) |
| پین 40 | NC — Not connected (per datasheet) |
| پین 41 | NC — Not connected (per datasheet) |
| پین 42 | NC — Not connected (per datasheet) |
| پین 43 | BST1 — Bootstrap capacitor channel 1 |
| پین 44 | BST2 — Bootstrap capacitor channel 2 |
| پین 45 | BST3 — Bootstrap capacitor channel 3 |
| پین 46 | BST4 — Bootstrap capacitor channel 4 |
| پین 47 | BST5 — Bootstrap capacitor channel 5 |
| پین 48 | BST6 — Bootstrap capacitor channel 6 |
| پین 49 | BST7 — Bootstrap capacitor channel 7 |
| پین 50 | BST8 — Bootstrap capacitor channel 8 |
| پین 51 | VIN — Main input supply |
| پین 52 | VIN — Main input supply |
| پین 53 | PGND — Power ground |
| پین 54 | PGND — Power ground |
| پین 55 | PGND — Power ground |
| پین 56 | EP — Exposed pad - thermal pad, connect to ground |
کاربردهای معمول
MC34704AEPR2 مناسب است برای 6 کاربردs: 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.
پیشنهادی
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.
پیشنهادی
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.
پیشنهادی
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.
پیشنهادی
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.
پیشنهادی
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.
پیشنهادی
خلاصه محصولات پیشنهادی
داده‌های مرجع مهندسی برای MC34704AEPR2 — مقایسه، راهنمای طراحی و اطلاعات انطباق.
راهنمای انتخاب
مقایسه با جایگزین‌ها
| پارامتر | این محصول | 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 |
تفاوت‌های کلیدی
- 8 independent output rails from a single Li-Ion input (در مقابلDiscrete multi-regulator designs)
- Wide 2.7V-5.5V single-input range (در مقابلPMICs requiring 3.3V minimum input)
- Integrated synchronous buck FETs with sequencing (در مقابلPMICs requiring external FETs)
یادداشت‌های طراحی
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.
اطلاعات انطباق
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.
