MC34704AEPR2 - Multi-Channel PMIC, 8 DC/DC QFN-56 | NXP
部品番号: MC34704AEPR2 ✗ 生産終了| 数量 | 単価 | 小計 |
|---|---|---|
| 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 概要
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.
ドロップイン代替品: MC34704AEPR2 — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
このシリーズのバリエーション
同一シリーズでドロップイン互換のモデル: MC34704AEPR2 （同一形状・フットプリント） — 相違点: Lead-Free, Package, RoHS Status, Topology.
クイック比較ツール — 並列比較する代替部品を選択:
MC34704EP
✅ ドロップイン📋 参考代替品（カタログ未掲載）
MC34704AEPR2
✅ ドロップイン✓ 在庫あり
$2.85 / 個
データシートを見る →MC34704AEPR2 最大定格＆電気的特性
| トポロジー | Multi-channel synchronous buck PMIC |
| 出力数 | Up to 8 (or 5 DC/DC in alternate configuration) |
| 入力電圧範囲 | 2.7 V to 5.5 V |
| Output Voltage Channels | 8 independent programmable rails |
| パッケージ | QFN-56 (7x7 mm) with exposed pad |
| 実装タイプ | 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 ステータス | Compliant (per DigiKey listing) |
| Lead-Free | Yes (per distributor listing) |
| ピン数 | 56 |
MC34704AEPR2 ピン構成
| ピン 1 | AGND — Analog ground |
| ピン 2 | VIN — Main input supply (2.7V-5.5V) |
| ピン 3 | EN1 — Enable for channel 1 |
| ピン 4 | FB1 — Feedback for channel 1 output |
| ピン 5 | SW1 — Switch node channel 1 |
| ピン 6 | PGND — Power ground |
| ピン 7 | SW2 — Switch node channel 2 |
| ピン 8 | FB2 — Feedback for channel 2 |
| ピン 9 | EN2 — Enable for channel 2 |
| ピン 10 | SW3 — Switch node channel 3 |
| ピン 11 | FB3 — Feedback for channel 3 |
| ピン 12 | EN3 — Enable for channel 3 |
| ピン 13 | SW4 — Switch node channel 4 |
| ピン 14 | FB4 — Feedback for channel 4 |
| ピン 15 | EN4 — Enable for channel 4 |
| ピン 16 | PGND — Power ground |
| ピン 17 | SW5 — Switch node channel 5 |
| ピン 18 | FB5 — Feedback for channel 5 output |
| ピン 19 | EN5 — Enable for channel 5 |
| ピン 20 | PGND — Power ground |
| ピン 21 | SW6 — Switch node channel 6 |
| ピン 22 | FB6 — Feedback for channel 6 |
| ピン 23 | EN6 — Enable for channel 6 |
| ピン 24 | SW7 — Switch node channel 7 |
| ピン 25 | FB7 — Feedback for channel 7 |
| ピン 26 | EN7 — Enable for channel 7 |
| ピン 27 | SW8 — Switch node channel 8 |
| ピン 28 | FB8 — Feedback for channel 8 |
| ピン 29 | EN8 — Enable for channel 8 |
| ピン 30 | PGND — Power ground |
| ピン 31 | VCC — Internal LDO output / bypass |
| ピン 32 | AGND — Analog ground |
| ピン 33 | REF — Internal reference voltage |
| ピン 34 | COMP — Compensation node |
| ピン 35 | SS — Soft-start programming |
| ピン 36 | POK — Power-OK indicator (open-drain) |
| ピン 37 | SCL — I2C clock (or NC on hard-wired variant) |
| ピン 38 | SDA — I2C data (or NC on hard-wired variant) |
| ピン 39 | NC — Not connected (per datasheet) |
| ピン 40 | NC — Not connected (per datasheet) |
| ピン 41 | NC — Not connected (per datasheet) |
| ピン 42 | NC — Not connected (per datasheet) |
| ピン 43 | BST1 — Bootstrap capacitor channel 1 |
| ピン 44 | BST2 — Bootstrap capacitor channel 2 |
| ピン 45 | BST3 — Bootstrap capacitor channel 3 |
| ピン 46 | BST4 — Bootstrap capacitor channel 4 |
| ピン 47 | BST5 — Bootstrap capacitor channel 5 |
| ピン 48 | BST6 — Bootstrap capacitor channel 6 |
| ピン 49 | BST7 — Bootstrap capacitor channel 7 |
| ピン 50 | BST8 — Bootstrap capacitor channel 8 |
| ピン 51 | VIN — Main input supply |
| ピン 52 | VIN — Main input supply |
| ピン 53 | PGND — Power ground |
| ピン 54 | PGND — Power ground |
| ピン 55 | PGND — Power ground |
| ピン 56 | EP — Exposed pad - thermal pad, connect to ground |
主な用途
MC34704AEPR2 の用途: 6 件s: 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.
おすすめ
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.
おすすめ
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.
おすすめ
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.
おすすめ
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.
おすすめ
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.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: MC34704AEPR2 — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | 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 |
主な差別化要因
- 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)
設計ノート
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.
コンプライアンス情報
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.
