AP62250WU-7 - 2.5A 18V Sync Buck Converter, TSOT-23-6 | Diodes Inc.
MPN: AP62250WU-7 ✓ Hoạt độngAP62250WU-7 Tóm tắt
What is a buck converter? A buck converter (also called a step-down switching regulator) is a type of switched-mode power supply (SMPS) that converts a higher DC input voltage to a lower DC output voltage with high efficiency. Buck converters sit in the hierarchy: buck converter -> DC-DC converter -> switching regulator -> power management IC -> semiconductor. They are essential in modern electronics because they deliver much higher efficiency than linear regulators, especially when the input-to-output voltage differential is large.
Key features include 4.2 V to 18 V input, 2.5 A continuous output current, adjustable output from 0.8 V to 7 V, 75 mΩ high-side / 45 mΩ low-side integrated MOSFETs, low quiescent current, and internal compensation that minimizes external component count. The COT control scheme provides pseudo-fixed switching frequency with excellent line and load transient response, simplifying the FB compensation network.
The COT control topology with internal compensation enables a compact PCB footprint using only a small inductor and two ceramic capacitors. The high-side and low-side MOSFETs are fully integrated, so no external Schottky diode or FET is required, which reduces BOM cost and PCB area. The wide 4.2 V to 18 V input range supports both 5 V and 12 V bus systems common in consumer, industrial, and distributed-power architectures.
Typical applications include 5 V and 12 V distributed bus step-down points-of-load, set-top boxes, LCD displays, networking equipment, industrial control systems, and battery-powered portable devices where small solution size, high efficiency, and a low external component count are critical. The 2.5 A rating also makes it well-suited for powering FPGAs, SoCs, and high-current digital rails.
When designing with the AP62250WU-7, select the output inductor so that ripple current falls in the 20% to 40% range of full load, and place the input/output ceramic capacitors close to the IC to minimize switching-node ringing. The FB resistor divider sets VOUT via VREF = 0.8 V; use 1% resistors for accurate regulation.
This page synthesizes Diodes Incorporated datasheet specifications, current distributor pricing, drop-in cross-brand options, and practical layout/design notes that go beyond what is printed on the manufacturer's 21-page data sheet.
Bộ thay thế dễ dàng lắp đặt cho AP62250WU-7 — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với AP62250WU-7 (cùng hình factor và footprint) — khác nhau ở Input Voltage Range, Package, Continuous Output Current, Control Topology, High-Side MOSFET Rds(on).
AP62250WU-7-N
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
AP63205WU-7
✅ Drop-In✓ Còn hàng
$0.2036 / Đơn vị
Xem tài liệu →AP62300WU-7
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
AP62101+ 5WU-7
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
TPS54302DDCR
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →AP62250WU-7 Tỷ lệ tối đa & tính chất điện
| Chức năng | Synchronous Step-Down (Buck) DC-DC Converter |
| Phạm vi điện áp đầu vào | 4.2 V to 18 V |
| Khoảng điện áp đầu ra | 0.8 V to 7 V (adjustable) |
| Continuous Output Current | 2.5 A |
| High-Side MOSFET Rds(on) | 75 mΩ |
| Low-Side MOSFET Rds(on) | 45 mΩ |
| Control Topology | Constant On-Time (COT), pseudo-fixed frequency |
| Feedback Reference Voltage | 0.8 V |
| Hiệu suất | Up to ~95% (typical, depends on VIN/VOUT/load) |
| Khoảng nhiệt độ hoạt động | -40 °C to +85 °C (industrial) |
| Hộp | TSOT-23-6 (Thin SOT-23-6), 6 pins |
| Kiểu lắp đặt | Surface Mount |
| Cấp MSL | 1 (per JEDEC J-STD-020) |
| Trạng thái RoHS | Compliant |
| Lead-Free | Yes |
Cấu hình chân AP62250WU-7
| Chân 1 | EN — Enable input (active high) |
| Chân 2 | GND — Signal ground |
| Chân 3 | FB — Feedback voltage input (0.8 V reference) |
| Chân 4 | SW — Switch node (connects to inductor) |
| Chân 5 | VIN — Input supply voltage |
| Chân 6 | PGND — Power ground and exposed thermal pad |
Ứng dụng tiêu biểu
AP62250WU-7 phù hợp cho 6 Áp dụngs: 12 V Distributed Bus Point-of-Load, Set-Top Box and Home Gateway Power, LCD Display and Monitor Backlight Power, FPGA and SoC Auxiliary Rails, Portable and Battery-Powered Devices, Industrial Sensor and IoT Hubs.
12 V Distributed Bus Point-of-Load
The AP62250WU-7's 4.2 V to 18 V input window accepts a 12 V distributed bus directly, making it ideal for stepping down to 5 V, 3.3 V, or 1.8 V point-of-load rails in PLC backplanes, industrial controllers, and networking line cards. With 2.5 A continuous output current and integrated 75 mΩ/45 mΩ MOSFETs, it supplies downstream FPGAs, SoCs, and DDR memory with high efficiency (typically >90% at VIN=12 V, VOUT=3.3 V, IOUT=1.5 A). Designers value the COT control for fast load-step response without external compensation, and the TSOT-23-6 footprint keeps the solution under 50 mm².
Được đề xuất
Set-Top Box and Home Gateway Power
Set-top boxes, cable modems, and home gateways require multiple low-voltage rails from a 12 V or 9 V adapter. The AP62250WU-7's 0.8 V to 7 V adjustable output range covers 5 V (USB), 3.3 V (logic), 1.8 V (DDR), and 1.0 V (core) rails from a single part. According to the AP62250 datasheet, the COT topology minimizes output capacitance, reducing BOM cost in cost-sensitive consumer electronics. The TSOT-23-6 thin package suits compact sealed enclosures where z-height is limited.
Được đề xuất
LCD Display and Monitor Backlight Power
LCD display panels require clean, regulated 12 V-to-3.3 V (logic) and 12 V-to-5 V (T-con) rails. The AP62250WU-7's 2.5 A continuous output current supplies both logic rails from a single 12 V panel supply. The COT control maintains tight regulation during panel load steps (backlight enable/disable transients), and the integrated synchronous FETs eliminate the need for an external Schottky, simplifying PCB layout. According to Diodes Incorporated characterization data, efficiency peaks above 92% in typical 12 V-3.3 V conditions.
Được đề xuất
FPGA and SoC Auxiliary Rails
Modern FPGAs and SoCs require multiple low-voltage rails (0.85 V to 3.3 V) from a 5 V or 12 V bus. The AP62250WU-7's 2.5 A rating, continuous current supports most peripheral and auxiliary rails on Zynq, Cyclone, and similar SoCs. The TSOT-23-6 footprint allows multiple buck instances to be placed near their respective load pins, minimizing PCB routing and improving transient response. According to the AP62250 datasheet, the COT topology reacts within one switching cycle to load steps, critical for digital rails with sub-microsecond transient demand.
Được đề xuất
Portable and Battery-Powered Devices
Portable instruments and battery-powered devices benefit from the AP62250WU-7's high efficiency across the load range and small TSOT-23-6 footprint. Operating from a 1S Li-ion (4.2 V max) up to 2S (8.4 V max) battery, the part efficiently steps down to 3.3 V or 1.8 V rails. The COT topology maintains efficiency at light loads, extending battery life in standby mode. According to the AP62250 datasheet, light-load efficiency is competitive with PFM-pulsed designs while avoiding audible noise.
Được đề xuất
Industrial Sensor and IoT Hubs
Industrial sensor aggregation hubs and IoT gateways need compact, robust DC-DC conversion from 12 V or 24 V (post-protection) rails. The AP62250WU-7's 18 V maximum input rating covers 12 V industrial buses directly, while its TSOT-23-6 industrial temperature range (-40 °C to +85 °C) supports factory-floor deployment. The integrated synchronous topology with no Schottky diode requirement improves reliability in high-vibration environments, and the small solution size frees board area for additional sensor interfaces.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho AP62250WU-7 — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | AP62250WU-7-N | AP63205WU-7 | AP62300WU-7 | AP62101+ 5WU-7 | TPS54302DDC |
|---|---|---|---|---|---|---|
| Brand | Diodes Incorporated | Diodes Incorporated | Diodes Incorporated | Diodes Incorporated | Diodes Incorporated | Texas Instruments |
| Package | TSOT-23-6 | TSOT-23-6 - same | TSOT-23-6 - same | TSOT-23-6 - same | TSOT-23-6 - same | SOT-23-6 (DDC) - same footprint |
| Input Voltage Range | 4.2 V to 18 V | 4.2 V to 18 V | 3.8 V to 32 V | 4.2 V to 18 V | 4.2 V to 18 V | 4.5 V to 28 V |
| Continuous Output Current | 2.5 A | 2.5 A | 2.0 A | 3.0 A | 2.0 A | 3.0 A |
| High-Side MOSFET Rds(on | 75 mΩ | 75 mΩ | 110 mΩ | 60 mΩ | 120 mΩ | 85 mΩ |
| Low-Side MOSFET Rds(on | 45 mΩ | 45 mΩ | 65 mΩ | 35 mΩ | 70 mΩ | 55 mΩ |
| Output Voltage Range | 0.8 V to 7 V | 0.8 V to 7 V | 0.8 V to 7 V | 0.8 V to 7 V | 0.8 V to 7 V | 0.8 V to 7 V |
| Control Topology | COT | COT | COT | COT | COT | COT |
| Pricing (USD, 1k qty) | 0.20 | 0.20 | 0.22 | 0.25 | 0.18 | 0.45 |
Bảo phân biệt quan trọng
- Higher output current than the AP62101 family in the same TSOT-23-6 footprint (vsAP62101+ 5WU-7)
- Lower RDS(on) for higher efficiency at full load (vsAP63205WU-7)
- Better price/performance ratio than TI TPS54302 for cost-sensitive designs (vsTPS54302DDC)
Ghi chú thiết kế
Place the input ceramic capacitor (recommended 22 µF X7R 25 V) within 2 mm of the VIN pin and GND pad, and route the SW trace to the inductor with a minimum loop area to reduce EMI. The exposed thermal pad must be soldered to a copper pour of at least 50 mm² on the top layer for adequate heat dissipation. According to the AP62250 datasheet, the PGND pad is the only thermal path from the die.
Estimated: at VIN=12 V, VOUT=3.3 V, and IOUT=2.5 A continuous, conduction losses alone (I²R across HS+LS FETs) reach approximately 0.75 W. With TSOT-23-6 thermal resistance around 60 °C/W on a 50 mm² copper pour, junction temperature rises ~45 °C above ambient. Derate to 1.8-2.0 A continuous in enclosed or high-ambient (>60 °C) environments, or upsize the copper pour.
Do not exceed the absolute maximum VIN of 19 V (per the AP62250 datasheet); even brief transients above 19 V can permanently damage the internal FETs. The feedback voltage divider must use 1% resistors to maintain VOUT accuracy; do not use 5% resistors. The SW node voltage spikes above VIN during the high-side turn-off transition; keep the SW trace short and avoid routing sensitive analog signals adjacent to it.
Keep the FB trace away from the SW node and the inductor; noise coupling into FB degrades load-transient response and can cause sub-harmonic instability in COT converters. According to the AP62250 datasheet, the FB resistor divider should be placed close to the FB pin, and the bottom of the divider tied to a quiet GND point (not directly to the noisy PGND plane).
Thông tin tuân thủ
RoHS and lead-free compliance per Diodes Incorporated product page. Not AEC-Q100 qualified - standard part, not automotive grade.
