MC34704AEPR2 - Multi-Channel PMIC, 8 DC/DC QFN-56 | NXP
Référence : MC34704AEPR2 ✗ Fin de vie| Qté | Prix unitaire | Total |
|---|---|---|
| 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 Présentation
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.
Alternatives de remplacement direct pour MC34704AEPR2 — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec MC34704AEPR2 (même facteur de forme et même empreinte) — différant par Lead-Free, Package, RoHS Status, Topology.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
MC34704EP
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
MC34704AEPR2
✅ Remplacement direct✓ En stock
$2.85 / unité
Voir la fiche technique →MC34704AEPR2 Valeurs maximales et caractéristiques électriques
| Topologie | Multi-channel synchronous buck PMIC |
| Nombre de sorties | Up to 8 (or 5 DC/DC in alternate configuration) |
| Plage de tension d'entrée | 2.7 V to 5.5 V |
| Output Voltage Channels | 8 independent programmable rails |
| Boîtier | QFN-56 (7x7 mm) with exposed pad |
| Type de montage | 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) |
| Statut RoHS | Compliant (per DigiKey listing) |
| Lead-Free | Yes (per distributor listing) |
| Nombre de broches | 56 |
Configuration des broches de MC34704AEPR2
| Broche 1 | AGND — Analog ground |
| Broche 2 | VIN — Main input supply (2.7V-5.5V) |
| Broche 3 | EN1 — Enable for channel 1 |
| Broche 4 | FB1 — Feedback for channel 1 output |
| Broche 5 | SW1 — Switch node channel 1 |
| Broche 6 | PGND — Power ground |
| Broche 7 | SW2 — Switch node channel 2 |
| Broche 8 | FB2 — Feedback for channel 2 |
| Broche 9 | EN2 — Enable for channel 2 |
| Broche 10 | SW3 — Switch node channel 3 |
| Broche 11 | FB3 — Feedback for channel 3 |
| Broche 12 | EN3 — Enable for channel 3 |
| Broche 13 | SW4 — Switch node channel 4 |
| Broche 14 | FB4 — Feedback for channel 4 |
| Broche 15 | EN4 — Enable for channel 4 |
| Broche 16 | PGND — Power ground |
| Broche 17 | SW5 — Switch node channel 5 |
| Broche 18 | FB5 — Feedback for channel 5 output |
| Broche 19 | EN5 — Enable for channel 5 |
| Broche 20 | PGND — Power ground |
| Broche 21 | SW6 — Switch node channel 6 |
| Broche 22 | FB6 — Feedback for channel 6 |
| Broche 23 | EN6 — Enable for channel 6 |
| Broche 24 | SW7 — Switch node channel 7 |
| Broche 25 | FB7 — Feedback for channel 7 |
| Broche 26 | EN7 — Enable for channel 7 |
| Broche 27 | SW8 — Switch node channel 8 |
| Broche 28 | FB8 — Feedback for channel 8 |
| Broche 29 | EN8 — Enable for channel 8 |
| Broche 30 | PGND — Power ground |
| Broche 31 | VCC — Internal LDO output / bypass |
| Broche 32 | AGND — Analog ground |
| Broche 33 | REF — Internal reference voltage |
| Broche 34 | COMP — Compensation node |
| Broche 35 | SS — Soft-start programming |
| Broche 36 | POK — Power-OK indicator (open-drain) |
| Broche 37 | SCL — I2C clock (or NC on hard-wired variant) |
| Broche 38 | SDA — I2C data (or NC on hard-wired variant) |
| Broche 39 | NC — Not connected (per datasheet) |
| Broche 40 | NC — Not connected (per datasheet) |
| Broche 41 | NC — Not connected (per datasheet) |
| Broche 42 | NC — Not connected (per datasheet) |
| Broche 43 | BST1 — Bootstrap capacitor channel 1 |
| Broche 44 | BST2 — Bootstrap capacitor channel 2 |
| Broche 45 | BST3 — Bootstrap capacitor channel 3 |
| Broche 46 | BST4 — Bootstrap capacitor channel 4 |
| Broche 47 | BST5 — Bootstrap capacitor channel 5 |
| Broche 48 | BST6 — Bootstrap capacitor channel 6 |
| Broche 49 | BST7 — Bootstrap capacitor channel 7 |
| Broche 50 | BST8 — Bootstrap capacitor channel 8 |
| Broche 51 | VIN — Main input supply |
| Broche 52 | VIN — Main input supply |
| Broche 53 | PGND — Power ground |
| Broche 54 | PGND — Power ground |
| Broche 55 | PGND — Power ground |
| Broche 56 | EP — Exposed pad - thermal pad, connect to ground |
Applications typiques
MC34704AEPR2 convient pour 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.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour MC34704AEPR2 — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | 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 |
Principaux différenciateurs
- 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)
Notes de conception
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.
Informations de conformité
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.
