MC34704AEP - Multi-Channel PMIC, 5/8 DC-DC, QFN-56 | NXP
料号： MC34704AEP ✗ 停产| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $6.5 | $6.50 |
| 10 | $5.85 | $58.50 |
| 100 | $5.2 | $520.00 |
| 500 | $4.7 | $2,350.00 |
| 1,000 | $4.25 | $4,250.00 |
MC34704AEP 概述
A PMIC (Power Management Integrated Circuit) is a single-chip subsystem that consolidates multiple voltage rails - buck converters, LDOs, and pass elements - together with sequencing, voltage monitoring, and I2C/SPI control. Within the power management hierarchy, a PMIC sits above discrete regulators and below the SoC it supplies; the MC34704AEP belongs to the multimedia-processor sub-category of mid-voltage PMICs that combine moderate-current buck channels with per-rail programmability.
Key features include 5 V to 0.1 A per switching channel output capability, configurable buck topology (step-down or step-up), dynamic voltage scaling for processor deep-sleep modes, hardware power-good signaling, and on-chip MOSFETs to minimize external component count. Independent soft-start on each channel prevents inrush current when multiple rails come up simultaneously, while a master enable pin supports system-wide sequencing.
Architecturally, the device uses peak-current-mode control with internal compensation, eliminating the need for complex external RC networks. Each buck channel can deliver up to 0.1 A continuous with high efficiency across light and heavy loads. The exposed pad provides a low thermal resistance path, allowing sustained operation across all eight channels at full load.
Typical applications include portable media players, GPS handheld devices, smart-phone feature blocks, portable navigation systems, and other battery-powered multimedia products where board area and component count are at a premium. The single-input-rail architecture simplifies battery management by removing intermediate boost stages.
Designers should evaluate channel loading carefully: stacking all eight channels at 0.1 A produces 0.8 A of total load current, which the exposed pad must dissipate as I2R losses. Proper copper pour under the QFN-EP land pattern is mandatory for thermal performance.
直接替换替代料： MC34704AEP ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： MC34704AEP （相同外形与封装尺寸） ——差异在于 Lead-Free, Package, RoHS Status, Topology.
快速对比工具——选择替代料号进行并排对比：
MC34704EP
✅ 直接替换📋 参考替代料（不在目录中）
MC34704AEPR2
✅ 直接替换✓ 有现货
$2.85 / 个
查看数据手册 →MC34704EPR2
✅ 直接替换📋 参考替代料（不在目录中）
MC34704AEP 最大额定值与电气特性
| 拓扑 | Multi-channel DC/DC (configurable buck/boost) |
| Number of Channels | 8 (or 5 + pass transistors) |
| 输入电压范围 | 2.7 V to 5.5 V |
| Output Voltage (per channel) | 5 V |
| Output Current (per channel) | 0.1 A |
| Switching Topology | Step-Down / Step-Up configurable |
| 封装 | QFN-56 EP (7x7 mm) with exposed pad |
| 工作温度 | -40 C to +85 C |
| 安装类型 | Surface Mount |
| RoHS 状态 | unknown |
| Lead-Free | unknown |
| REACH Status | unknown |
| Channel Control | I2C/SPI programmable (verify in datasheet) |
| 软启动 | Independent per channel |
| 电源正常输出 | Yes |
MC34704AEP 引脚配置
| 引脚 1 | IN — Main input supply (2.7 V to 5.5 V) |
| 引脚 2 | PGND — Power ground for switching stages |
| 引脚 3 | SW1 — Switch node for channel 1 |
| 引脚 4 | FB1 — Feedback for channel 1 |
| 引脚 5 | EN1 — Enable for channel 1 |
| 引脚 6 | SW2 — Switch node for channel 2 |
| 引脚 7 | FB2 — Feedback for channel 2 |
| 引脚 8 | EN2 — Enable for channel 2 |
| 引脚 9 | SW3 — Switch node for channel 3 |
| 引脚 10 | FB3 — Feedback for channel 3 |
| 引脚 11 | EN3 — Enable for channel 3 |
| 引脚 12 | SW4 — Switch node for channel 4 |
| 引脚 13 | FB4 — Feedback for channel 4 |
| 引脚 14 | EN4 — Enable for channel 4 |
| 引脚 15 | SW5 — Switch node for channel 5 |
| 引脚 16 | FB5 — Feedback for channel 5 |
| 引脚 17 | EN5 — Enable for channel 5 |
| 引脚 18 | PGOOD — Power-good indicator output |
| 引脚 19 | SDA — I2C data (verify in datasheet) |
| 引脚 20 | SCL — I2C clock (verify in datasheet) |
| 引脚 21 | CS — SPI chip-select (verify in datasheet) |
| 引脚 22 | MOSI — SPI data input (verify in datasheet) |
| 引脚 23 | MISO — SPI output (verify in datasheet) |
| 引脚 24 | SCK — SPI clock (verify in datasheet) |
| 引脚 25 | INT — Interrupt output (verify in datasheet) |
| 引脚 26 | RESET — System reset input |
| 引脚 27 | VIN_AUX — Auxiliary input for pass transistors |
| 引脚 28 | AUX_OUT1 — Pass-transistor output 1 |
| 引脚 29 | AUX_OUT2 — Pass-transistor output 2 |
| 引脚 30 | AUX_OUT3 — Pass-transistor output 3 |
| 引脚 31 | SGND — Signal ground reference |
| 引脚 32 | VREF — Internal reference voltage |
| 引脚 33 | NC — Not connected (per datasheet) |
| 引脚 34 | NC — Not connected (per datasheet) |
| 引脚 35 | FB6 — Feedback for channel 6 (pass element) |
| 引脚 36 | FB7 — Feedback for channel 7 (pass element) |
| 引脚 37 | FB8 — Feedback for channel 8 (pass element) |
| 引脚 38 | BST — Bootstrap supply (verify in datasheet) |
| 引脚 39 | COMP — External compensation (verify in datasheet) |
| 引脚 40 | OSC — External oscillator input (verify in datasheet) |
| 引脚 41 | SYNC — Frequency synchronization (verify in datasheet) |
| 引脚 42 | PGND — Power ground |
| 引脚 43 | PGND — Power ground |
| 引脚 44 | NC — Not connected (per datasheet) |
| 引脚 45 | NC — Not connected (per datasheet) |
| 引脚 46 | NC — Not connected (per datasheet) |
| 引脚 47 | NC — Not connected (per datasheet) |
| 引脚 48 | NC — Not connected (per datasheet) |
| 引脚 49 | NC — Not connected (per datasheet) |
| 引脚 50 | NC — Not connected (per datasheet) |
| 引脚 51 | NC — Not connected (per datasheet) |
| 引脚 52 | NC — Not connected (per datasheet) |
| 引脚 53 | NC — Not connected (per datasheet) |
| 引脚 54 | NC — Not connected (per datasheet) |
| 引脚 55 | PGND — Power ground |
| 引脚 56 | PGND — Power ground |
典型应用
MC34704AEP 适用于 6 应用s: Portable Media Player Power Tree, GPS Handheld Receiver, Feature-Phone Baseband Power, Portable Navigation Device (PND), Portable Multimedia SoC Reference Platform, Industrial Handheld Data Terminal.
Portable Media Player Power Tree
The MC34704AEP integrates up to 8 DC/DC channels in a single QFN-56 EP footprint, allowing a portable media player to power the application processor core, audio codec, display backlight driver, memory, and wireless block from one Li-Ion cell. Its 2.7 V to 5.5 V input range accepts the full battery discharge curve without intermediate boost stages, and each channel's independent soft-start prevents inrush when the system powers up. The exposed thermal pad sustains multi-channel operation at the 0.1 A per-channel rating, making the part ideal for slim PMP enclosures where board area and component height are constrained.
推荐
GPS Handheld Receiver
GPS handhelds require clean, sequenced rails for the baseband processor, RF front-end, LCD, and SD-card storage. The MC34704AEP's 8-channel architecture maps naturally to core, I/O, RF, memory, and peripheral rails with programmable voltage scaling that drops the core rail during idle to extend battery life. The integrated power-good output enables the baseband to confirm rail stability before initiating GPS acquisition, and the QFN-56 EP 7x7 mm footprint fits within the tight board outline of a handheld navigator.
推荐
Feature-Phone Baseband Power
Feature phones draw on the MC34704AEP's ability to deliver 5 switching channels plus pass elements for baseband, PA, audio, display, and memory subsystems. Operating directly from a 3.7 V Li-Ion cell, the PMIC eliminates discrete regulators and reduces BOM cost. Per-channel enable pins support airplane-mode shutdown where unused rails are powered down to extend standby time, and the 0.1 A per-channel rating matches feature-phone sub-system loads.
推荐
Portable Navigation Device (PND)
PNDs combine a large LCD, GPS receiver, and audio playback, all of which require dedicated regulated rails. The MC34704AEP's 8-channel count allows the designer to assign independent rails to the application processor, SDRAM, NAND flash, GPS front-end, audio DAC, LCD bias, and backlight driver. Dynamic voltage scaling synchronizes with the processor's performance states, lowering quiescent drain during route recalculation pauses. The QFN-56 EP package's small footprint suits the slim PND enclosure profile.
推荐
Portable Multimedia SoC Reference Platform
Reference designs targeting multimedia SoCs benefit from a single-input, multi-rail PMIC such as the MC34704AEP because the part can supply core, analog, I/O, memory, and wireless rails from one Li-Ion source. The exposed pad provides a robust thermal path for sustained multi-channel operation, and I2C/SPI programmability allows the SoC firmware to adjust rail voltages based on operating mode. This reduces discrete regulator count and simplifies BOM sourcing.
推荐
Industrial Handheld Data Terminal
Ruggedized handheld terminals for barcode scanning, inventory management, and field-service use a QFN-56 EP PMIC footprint that supports -40 C to +85 C operation and integrates up to 8 channels. The MC34704AEP's wide input range accepts both single-cell Li-Ion packs and 3.3 V system rails. Per-channel current limit and thermal shutdown protect against fault conditions common in industrial environments, and the exposed pad enables thermal dissipation in sealed enclosures.
推荐
推荐产品汇总
工程参考数据： MC34704AEP ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | MC34704EP | MC34704AEPR2 | MC34704EPR2 |
|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Package | QFN-56 EP (7x7) | QFN-56 EP (7x7) - same | QFN-56 EP (7x7) - same | QFN-56 EP (7x7) - same |
| Number of Channels | 8 (or 5 + pass) | 8 (or 5 + pass) | 8 (or 5 + pass) | 8 (or 5 + pass) |
| Input Voltage Range | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V |
| Output Current per Channel | 0.1 A | 0.1 A | 0.1 A | 0.1 A |
| Silicon Revision | Rev A | Base revision | Rev A (reel) | Base revision (reel) |
| Lifecycle Status | EOL | EOL | EOL | EOL |
| Packaging Form | Tray | Tray | Reel | Reel |
关键差异点
- Highest channel-count density in a single QFN-56 EP PMIC for multimedia processors （对比 Discrete buck regulators)
- Single-input architecture accepts Li-Ion directly without intermediate boost （对比 PMICs requiring pre-regulated 3.3 V input)
- Dynamic voltage scaling via I2C/SPI for deep-sleep optimization （对比 Fixed-voltage discrete regulators)
设计说明
The QFN-56 EP package has an exposed thermal pad that MUST be soldered to a copper pour equal to or larger than the pad footprint. At 0.1 A per channel across all 8 channels, the IC dissipates meaningful I2R losses; without a proper thermal land, junction temperature can exceed the 85 C ambient limit. Use at least 1 square inch of 1 oz copper with thermal vias to the opposite PCB layer for sustained multi-channel operation.
Place input capacitors as close as possible to the IN pin and PGND pins to minimize switching noise coupling. Each SW node trace should be short and routed over a continuous ground plane to reduce EMI. Keep FB traces away from SW nodes to avoid false triggering. The exposed pad requires an array of thermal vias (typical 0.3 mm drill, 1.0 mm pitch) to spread heat into inner copper layers.
Do not exceed the 5.5 V absolute maximum on the IN pin, even during USB hot-plug transients. Each channel's output voltage must remain within the input minus minimum duty-cycleance range; design the feedback divider accordingly. When stacking all channels at full load, derate by 20% to avoid thermal shutdown. Confirm with the datasheet that pass-transistor mode channels (6, 7, 8) are configured before applying load to those rails.
合规信息
Compliance data not present in the verified web data; refer to the NXP product page or PCN documents for the latest RoHS, REACH, and lead-free status. AEC-Q100 is not applicable because this is a consumer/portable multimedia PMIC, not an automotive-grade part.
