FAN2001MPX - 1A 5.5V Sync Buck Converter, 1.3MHz | onsemi
부품 번호: FAN2001MPX ✓ 활성| 수량 | 단가 | 합계 |
|---|---|---|
| 1 | $1.68 | $1.68 |
| 10 | $1.45 | $14.50 |
| 100 | $1.1 | $110.00 |
| 500 | $0.85 | $425.00 |
| 1,000 | $0.68 | $680.00 |
FAN2001MPX 개요
A buck (step-down) DC-DC converter is a switched-mode power supply topology that efficiently converts a higher DC input voltage to a lower DC output voltage by rapidly switching an inductor between charge and discharge phases. Buck converters sit within the broader hierarchy of voltage regulators (linear regulators vs. switching regulators), within the power management IC family of semiconductors. Synchronous buck converters replace the traditional rectifier diode with a low-side MOSFET to reduce conduction loss and improve efficiency, especially at high output currents.
Key features of the FAN2001MPX include an externally adjustable output voltage range from 0.8 V up to VIN (5.5 V maximum), 100% duty-cycle low-dropout operation, internal soft-start, and a Power Save mode that automatically skips switching cycles at light load to maximize efficiency. The exposed thermal pad provides a low thermal resistance path, enabling the part to deliver 1 A continuously without external heatsinking in typical application conditions.
The FAN2001MPX uses a peak-current-mode control architecture with internal compensation, simplifying external component selection and providing excellent line and load transient response. The 1.3 MHz switching frequency allows the use of small low-profile inductors and ceramic capacitors, while the synchronous rectification reduces ripple and improves light-load efficiency. A dedicated EN/SD pin enables simple on/off control and power sequencing in multi-rail systems.
Typical applications include single-cell Li-ion powered portable electronics, USB-powered peripherals, hard-disk drive power, point-of-load regulation in 5 V distributed systems, and battery-backed solid-state drives. The wide input range and high efficiency make it particularly suitable for designs where battery life and thermal performance are critical.
When designing with the FAN2001MPX, select an inductor with low DCR (typically 1 µH to 2.2 µH) and ensure the input/output ceramic capacitors meet the RMS current rating. The exposed pad must be soldered to a ground copper pour of at least 25 mm² for proper thermal dissipation.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone, providing engineers with a complete selection reference for portable power designs.
드롭인 대체품: FAN2001MPX — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
이 시리즈의 변형
다음과 드롭인 호환되는 동일 시리즈 모델: FAN2001MPX (동일 폼 팩터 및 풋프린트) — 차이점: Input Voltage Range, Maximum Output Current, Output Voltage Range, Package, Soft Start.
빠른 비교 도구 — 나란히 비교할 대체 부품을 선택하십시오:
FAN2002MPX
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
FAN2011MPX
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
FAN2013BMPX
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
MP2155
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
TPS62840DLCR
✅ 드롭인✓ 재고 있음
$1.21 / 개
데이터시트 보기 →RP8095
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
FAN2001MPX 최대 정격 & 전기적 특성
| 토폴로지 | Synchronous Buck (Step-Down) |
| 입력 전압 범위 | 2.5 V to 5.5 V |
| 출력 전압 범위 | 0.8 V to 5.5 V (adjustable) |
| 최대 출력 전류 | 1 A |
| 스위칭 주파수 | 1.3 MHz (typical) |
| Peak Efficiency | 96% |
| Control Mode | PWM Current Mode + Pulse Skip (Power Save) |
| Duty Cycle Range | 0% to 100% (low dropout operation) |
| 동작 온도 | -40 °C to +85 °C |
| 패키지 | 6-WDFN Exposed Pad (3 mm × 3 mm) |
| 실장 유형 | Surface Mount |
| 인에이블 핀 | Yes (EN/SD) |
| 소프트 스타트 | Internal |
| RoHS 상태 | Compliant |
FAN2001MPX 핀 구성
| 핀 1 | AGND — Analog ground (connect to PGND and exposed pad) |
| 핀 2 | VIN — Input supply voltage (2.5 V to 5.5 V) |
| 핀 3 | EN/SD — Enable / Shutdown pin (active high) |
| 핀 4 | FB — Feedback (connect to external resistor divider) |
| 핀 5 | SW — Switch node (connect to inductor) |
| 핀 6 | PGND — Power ground |
일반적인 애플리케이션
FAN2001MPX 적합 용도: 6 애플리케이션s: Single-Cell Li-ion Portable Electronics, USB-Powered Peripherals and Accessories, Hard Disk Drive and SSD Power, Battery-Backed Solid-State Drives, Point-of-Load Regulation in 5 V Distributed Systems, IoT and Wireless Sensor Nodes.
Single-Cell Li-ion Portable Electronics
The FAN2001MPX's 2.5 V–5.5 V input range perfectly matches single-cell Li-ion battery packs (3.0 V–4.2 V), making it an ideal point-of-load regulator for smartphones, tablets, wearables, and portable medical devices. The 1 A continuous output current supports common system rails such as 1.8 V core, 2.5 V DDR, and 3.3 V I/O directly from the battery without an intermediate boost stage. Its 96% peak efficiency minimizes battery drain, while the 1.3 MHz switching frequency enables small chip inductors that fit beneath the battery. According to the onsemi FAN2001 datasheet typical application circuit, a 1 µH inductor plus 10 µF ceramic input/output capacitors delivers full 1 A load with low ripple. The Power Save mode further extends runtime at idle by skipping switching cycles at light load, critical for always-on IoT endpoints.
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USB-Powered Peripherals and Accessories
The FAN2001MPX accepts 5 V USB VBUS directly and steps it down to system voltages such as 3.3 V, 2.5 V, or 1.8 V for USB hubs, flash drives, and powered accessories. Its 100% duty-cycle low-dropout operation maintains regulation when VBUS droops to 4.5 V under heavy hub load, ensuring downstream rails stay in spec. The synchronous rectification eliminates the need for an external Schottky diode, reducing BOM count and PCB area in space-constrained USB dongles. According to onsemi's typical application circuit, only five external components (L, Cin, Cout, Rfb1, Rfb2) are required for a complete 1 A solution. The EN/SD pin enables USB suspend current compliance (<100 µA) when the host commands sleep, a key requirement for USB-IF certified peripherals.
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Hard Disk Drive and SSD Power
Hard disk drives and SATA SSDs require clean, low-noise 5 V, 3.3 V, and 1.8 V rails with tight transient response for spindle motor control and flash memory read/write. The FAN2001MPX provides up to 1 A per rail with synchronous rectification, which reduces output ripple compared to diode-rectified alternatives and minimizes conducted EMI that could couple into sensitive HDD preamp channels. The 1.3 MHz switching frequency is well above the audio band, eliminating audible whine from ceramic capacitors under variable load. According to onsemi datasheet specifications, the device's internal soft-start prevents inrush current that could trip host-side USB or SATA current-limit fuses during hot-plug events. A small 1 µH inductor plus 22 µF ceramic output capacitor maintains regulation during HDD spin-up surges up to 1.5 A transient, with the part automatically recovering to steady-state operation.
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Battery-Backed Solid-State Drives
Battery-backed SSDs and portable storage devices use the FAN2001MPX to step down Li-ion or Li-polymer battery voltage to the 3.3 V and 1.2 V rails required by NAND flash controllers and DRAM caches. The 96% peak efficiency at moderate loads preserves battery runtime during sustained read/write operations, while the 1.3 MHz PWM operation enables small footprint designs that fit inside M.2 SSD enclosures. The exposed thermal pad dissipates heat directly into the SSD PCB ground plane, eliminating the need for external heatsinks in space-constrained form factors. According to onsemi datasheet application notes, the part's internal compensation network removes the requirement for external compensation components, simplifying design-in for SSD reference designs. The EN/SD pin enables software-controlled power gating for sleep states, extending idle battery life in mobile storage applications.
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Point-of-Load Regulation in 5 V Distributed Systems
In distributed 5 V power architectures (FPGA boards, single-board computers, industrial controllers), the FAN2001MPX converts a common 5 V rail to local point-of-load voltages such as 1.0 V, 1.2 V, 1.5 V, 1.8 V, 2.5 V, and 3.3 V for MCUs, FPGAs, and memory. Placing the regulator adjacent to each load minimizes distribution losses, reduces bulk capacitor count, and improves transient response. According to onsemi datasheet, the FAN2001MPX achieves 96% efficiency at full load and remains above 85% at 10 mA light load thanks to Power Save mode skipping. The exposed thermal pad ties directly into the local ground pour for low-impedance thermal dissipation, and the part's small 6-WDFN 3×3 mm footprint leaves ample routing space on dense SoC carrier boards. Multiple FAN2001MPX instances on the same PCB share a common 5 V input without interference thanks to the internal soft-start staggered turn-on.
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IoT and Wireless Sensor Nodes
Battery-powered IoT endpoints, BLE beacons, and wireless sensor nodes benefit from the FAN2001MPX's high light-load efficiency, achieved through automatic Pulse Skip Power Save mode that bypasses switching cycles at sub-mA loads. A typical 3.6 V Li-SOCl2 primary cell or 3.0 V Li-MnO2 coin cell feeds the input, and the part produces a regulated 1.8 V or 2.5 V rail for low-power MCUs, BLE SoCs, and sensor front-ends. The 1 µA shutdown current (via EN/SD pin) preserves battery shelf life when the node is in deep sleep between transmissions, often the dominant operating mode for years-long deployments. According to onsemi datasheet figures, the FAN2001MPX maintains above 80% efficiency across the 1 mA to 500 mA load range, ideal for intermittent high-current RF transmission bursts. The compact 6-WDFN package fits within coin-cell holders and miniature sensor housings, enabling ultra-small form-factor IoT designs.
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추천 제품 요약
엔지니어링 참조 데이터: FAN2001MPX — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 | FAN2002MPX | FAN2011MPX | FAN2013BMPX | MP2155 | TPS62840 | RP8095 |
|---|---|---|---|---|---|---|---|
| Brand | onsemi | onsemi | onsemi | onsemi | MPS | Texas Instruments | Richtek |
| Package | 6-WDFN Exposed Pad | 6-WDFN Exposed Pad - same | 6-WDFN Exposed Pad - same | 6-WDFN Exposed Pad - same | 6-WDFN Exposed Pad - same | 6-WDFN Exposed Pad - same | 6-WDFN Exposed Pad - same |
| Input Voltage Range | 2.5 V to 5.5 V | 2.5 V to 5.5 V | 2.5 V to 5.5 V | 2.5 V to 5.5 V | 2.5 V to 5.5 V | 2.7 V to 6 V | 2.5 V to 5.5 V |
| Maximum Output Current | 1 A | 1 A | 1.5 A | 3 A | 1 A | 750 mA | 1 A |
| Switching Frequency | 1.3 MHz | 1.3 MHz | 1.3 MHz | 1.3 MHz | 1.3 MHz | 1.0–2.0 MHz adjustable | 1.3 MHz |
| Output Voltage Range | 0.8 V to 5.5 V | 0.8 V to 5.5 V | 0.8 V to 5.5 V | 0.8 V to 5.5 V | 0.8 V to 5.5 V | 0.8 V to 3.3 V | 0.8 V to 5.5 V |
| Peak Efficiency | 96% | 96% | 95% | 95% | 95% | 95% | 95% |
| Enable Pin | Yes (EN/SD) | Yes (EN/SD) | Yes (EN/SD) | Yes (EN/SD) | Yes | Yes | Yes |
주요 차별점
- Proven onsemi FAN200x family ecosystem with multiple same-package current options (vs FAN2001MPX vs FAN2002MPX)
- Higher output current capability than typical 6-pin 1 MHz class competitors (vs TPS62840 (Texas Instruments))
- 100% duty-cycle low-dropout operation for full battery utilization (vs MP2155 (MPS))
설계 노트
Solder the exposed thermal pad to a ground copper pour of at least 25 mm² to dissipate 1 W continuous power. Place input and output ceramic capacitors (10 µF X5R/X7R, 6.3 V minimum rating) within 2 mm of the VIN and PGND pins to minimize parasitic inductance that could cause voltage spikes on the SW node. According to onsemi FAN2001 datasheet layout guidelines, keep the FB trace away from the SW node to avoid noise coupling that perturbs output voltage regulation.
Estimated: at VIN=3.6 V, VOUT=1.8 V, IOUT=1 A, the FAN2001MPX dissipates approximately (3.6−1.8)·1 = 1.8 W with 50% duty cycle. The 6-WDFN package with exposed pad has θJA ≈ 50 °C/W on a 25 mm² 1-oz copper pour, yielding a junction temperature rise of about 90 °C above ambient. Designers targeting sustained 1 A at high VIN should use at least 50 mm² copper pour or measure junction temperature in application. Always verify under worst-case VIN, IOUT, and TA conditions.
Do not exceed the absolute maximum VIN of 6.5 V (5.5 V recommended operating). The SW node voltage can ring above VIN during switching transitions; ensure the inductor is rated for at least 1.5× saturation current and ceramic capacitors are rated for 1.5× the maximum DC voltage. Use 1% tolerance feedback resistors to maintain ±1% output voltage accuracy. Do not leave the EN/SD pin floating - tie to VIN via 100 kΩ resistor if always-on operation is required.
Keep the input capacitor return trace short and direct to PGND, not through the AGND pin. Route the SW node trace on the top layer only and minimize its area to reduce EMI radiation. Place the feedback divider close to the FB pin and route the high-impedance FB trace away from SW and inductor to avoid injected ripple. According to onsemi FAN2001 datasheet, a four-layer PCB with a continuous ground plane provides optimal EMI and thermal performance for 1.3 MHz switching.
규정 준수 정보
RoHS compliant per onsemi product page and LCSC C890637 listing. Halogen-free status not specified in provided data. Not AEC-Q100 qualified - choose automotive-grade alternatives for vehicle applications. Operating temperature -40 °C to +85 °C per LCSC listing.
