AP64100SP-13 - 40V 1A Sync Buck DC-DC Converter | Diodes Inc
MPN： AP64100SP-13 ✓ 啟用中AP64100SP-13 概覽
A buck converter (also called a step-down switching regulator) is a DC-DC topology that uses a power switch, an inductor, and a rectifier to convert a higher input voltage into a lower output voltage with high efficiency, typically 85-95%. The AP64100 belongs to the synchronous buck family, meaning it replaces the conventional Schottky diode with a low-side MOSFET, eliminating diode conduction loss. This places it within the broader hierarchy of switching voltage regulators -> DC-DC converters -> power management ICs -> semiconductors.
Key features of the AP64100SP-13 include a 22 µA typical quiescent current suitable for battery-powered or always-on systems, internal compensation that removes the need for an external compensation network, programmable soft-start via an external capacitor, and a power-good indicator for sequencing. The SO-8EP package provides a low thermal resistance path through the exposed pad, supporting full 1A output at elevated ambient temperatures with minimal PCB copper area.
Technically, the device uses peak current-mode control with internal slope compensation, providing cycle-by-cycle current limit and inherent input-voltage feed-forward. The high-side MOSFET RDSon of 150 mΩ (typical) and low-side 80 mΩ (typical) keep conduction losses low at 1A, while the 40V absolute maximum input voltage offers significant transient headroom for 12V and 24V industrial buses.
Typical applications include 12V/24V distributed power rails in industrial automation, smart-meter and HVAC controllers, white goods and appliance subsystems, battery-powered portable equipment, eMMC/SSD storage rails, and general-purpose 5V/3.3V point-of-load conversion. Its 40V input tolerance makes it especially attractive in 24V industrial environments where voltage transients on the bus can exceed nominal levels.
When designing with the AP64100SP-13, place the input bypass capacitor as close as possible to the PVIN and PGND pins, and use a continuous ground plane under the exposed pad for thermal dissipation. The feedback resistors should use 1% tolerance to maintain output voltage accuracy; the soft-start capacitor value sets the inrush current profile and should be sized to avoid triggering the UVLO threshold during startup.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found on the manufacturer datasheet alone, providing engineers with a single source for component evaluation, sourcing, and design-in.
直接替換替代品，適用於 AP64100SP-13 — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： AP64100SP-13 （相同外形與佔位） — 差異在於 Input Voltage Range, Maximum Output Current, Package, Switching Frequency, Topology.
AP64102SP-13
✅ 直接替換📋 參考替代品（不在目錄中）
AP6200SP-13
✅ 直接替換📋 參考替代品（不在目錄中）
TPS54302DDCR
✅ 直接替換聯絡詢價
查看資料表 →MP2316GJ
✅ 直接替換📋 參考替代品（不在目錄中）
LMR16006XDDCR
✅ 直接替換📋 參考替代品（不在目錄中）
AP64100SP-13 最大額定值與電氣特性
| 拓撲 | Synchronous Buck (Step-Down) |
| 輸入電壓範圍 | 3.8 V to 40 V |
| 輸出電壓範圍 | 0.8 V to V_IN (adjustable) |
| 最大輸出電流 | 1 A |
| High-Side MOSFET R_DS(on) | 150 mΩ (typical) |
| Low-Side MOSFET R_DS(on) | 80 mΩ (typical) |
| 切換頻率 | Adjustable, up to 2.2 MHz (typical 500 kHz) |
| 靜態電流 | 22 µA (typical) |
| Control Mode | Peak Current Mode |
| 工作溫度範圍 | -40 °C to +85 °C |
| 封裝 | 8-pin SOIC with Exposed Pad (SO-8EP) |
| 安裝類型 | Surface Mount |
| MSL 等級 | MSL 3 (per JEDEC J-STD-020) |
| Lead-Free / RoHS | Yes (compliant) |
| 軟啟動 | Programmable via external capacitor |
| Power Good Indicator | Yes |
| Internal Compensation | Yes |
AP64100SP-13 腳位配置
| 腳位 1 | BST — Bootstrap — connect 100 nF cap between BST and SW for high-side gate drive |
| 腳位 2 | IN — Input supply voltage (3.8V to 40V) |
| 腳位 3 | SW — Switch node — connect to power inductor |
| 腳位 4 | SW — Switch node — connect to power inductor |
| 腳位 5 | EN — Enable input (active high); tie to IN for always-on |
| 腳位 6 | FB — Feedback — connect to output resistor divider (0.8V reference) |
| 腳位 7 | PGND — Power ground return |
| 腳位 8 | PGOOD — Power-good open-drain output indicator |
典型應用
AP64100SP-13 適用於 6 應用s: 24V Industrial Sensor Power Rail, 12V Distributed Power Point-of-Load, Smart Meter and HVAC Controller Power, Battery-Powered Portable Equipment, White Goods and Appliance Subsystems, eMMC/SSD Storage Power Rail.
24V Industrial Sensor Power Rail
The AP64100SP-13's 3.8V to 40V input range directly accepts 24V industrial bus rails without pre-regulation, while the 150 mΩ high-side and 80 mΩ low-side MOSFETs deliver up to 1A output with peak efficiencies above 90% at typical step-down ratios. With 22 µA quiescent current, it supports always-on sensor nodes drawing minimal standby current between measurements. Placed between the 24V bus and the 3.3V/5V sensor rail, the device handles industrial voltage transients up to 36V without external TVS protection in most designs, reducing BOM cost.
推薦
12V Distributed Power Point-of-Load
In 12V distributed power systems, the AP64100SP-13 steps down to 5V, 3.3V, or 1.8V local rails for downstream ICs. Its adjustable switching frequency up to 2.2 MHz allows the inductor and capacitors to shrink significantly, enabling designs under 30 mm × 30 mm total solution size. Peak current-mode control provides fast transient response to load steps typical of microcontrollers and ASICs, while internal compensation eliminates the external compensation network that simpler converters require, reducing engineering time.
推薦
Smart Meter and HVAC Controller Power
Smart electricity meters and HVAC controllers operate from 24V AC-derived rails with significant ripple and load transients; the AP64100SP-13's wide 3.8V-40V input and 40V absolute maximum rating absorb these variations cleanly. Its low 22 µA quiescent current supports sleep-mode operation between wireless transmissions, critical for battery-backed or energy-harvesting meters. The exposed pad SO-8EP package dissipates up to ~1.5W in still air with modest copper, sufficient for the 1A load profile typical of these applications.
推薦
Battery-Powered Portable Equipment
Portable equipment powered by 2S-4S Li-ion battery packs (6V-16.8V) requires efficient step-down conversion with minimal idle drain. The AP64100SP-13's 22 µA quiescent current extends battery life during standby, while its 3.8V minimum input accommodates the discharged-state cutoff of 2S packs. Efficiency above 90% at 500 mA loads keeps thermal rise manageable in enclosed plastic enclosures without external heatsinking. The SO-8EP's 1.6 mm height fits inside slim portable form factors.
推薦
White Goods and Appliance Subsystems
White goods such as washing machines, dishwashers, and refrigerators contain multiple DC subsystems (display, sensors, motor controllers) requiring isolated or regulated rails. The AP64100SP-13 provides a compact, robust 5V or 3.3V supply from the appliance's rectified mains-derived bus (typically 12V-24V DC). Its wide operating temperature range up to +85°C and robust SO-8EP packaging meet the reliability demands of consumer appliance environments with vibration and humidity exposure.
推薦
eMMC/SSD Storage Power Rail
Embedded storage ICs (eMMC, NAND flash controllers, small SSDs) require clean 3.3V or 1.8V rails with tight load-transient tolerance. The AP64100SP-13's peak current-mode control delivers sub-microsecond transient response to sudden current spikes during flash page writes, which can swing from idle (mA) to active (1A) in nanoseconds. Internal compensation ensures stability across the full operating range without the load-step ringing seen in voltage-mode converters, protecting data integrity during write operations.
推薦
推薦產品摘要
工程參考資料，適用於 AP64100SP-13 — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | AP64102SP-13 | AP6200SP-13 | TPS54302DDC | MP2316GJ | LMR16006XDDCR |
|---|---|---|---|---|---|---|
| Brand | Diodes Incorporated | Diodes Incorporated | Diodes Incorporated | Texas Instruments | Monolithic Power Systems | Texas Instruments |
| Package | SO-8EP | SO-8EP - same | SO-8EP - same | SO-8EP - same | SO-8EP - same | SO-8EP - same |
| Input Voltage Range | 3.8V to 40V | 3.8V to 40V | 4.5V to 24V | 4.5V to 28V | 4V to 6V | 4V to 60V |
| Output Current | 1A | 1A | 1A | 3A (higher) | 3A (higher) | 500mA (lower) |
| Quiescent Current | 22 µA | 22 µA | 60 µA | 45 µA | 40 µA | 28 µA |
| Switching Frequency | Adjustable up to 2.2 MHz | Adjustable up to 2.2 MHz | 750 kHz fixed | Fixed 580 kHz | Fixed 1.2 MHz | Adjustable up to 2.1 MHz |
| Internal Compensation | Yes | Yes | Yes | Yes | Yes | Yes |
主要差異化特點
- Wider 40V input range than most SO-8EP 1A buck converters (對比TPS54302DDC)
- Lower quiescent current than typical same-class 1A buck converters (對比AP6200SP-13)
- Adjustable switching frequency up to 2.2 MHz enables smallest passives (對比AP6200SP-13)
設計說明
Estimated: at VIN=24V, VOUT=5V, IOUT=1A, power dissipation P = (24V - 5V) × 1A × (1 - η). Assuming η=88%, P ≈ 2.7W. The SO-8EP package has typical θ_JA of ~40 °C/W on a 4-layer 1-oz JEDEC test board, leading to a junction temperature rise of ~108 °C above ambient — at 85 °C ambient this approaches the 150 °C junction limit. For sustained full-load operation at high VIN, use additional copper pour under the exposed pad (at least 0.5 in²) or airflow to keep Tj below 125 °C.
Place the input ceramic bypass capacitor (4.7 µF or larger X7R) within 2 mm of the IN and PGND pins to minimize switching noise coupling. The bootstrap capacitor (100 nF) should connect directly between BST and SW with short traces to ensure proper high-side gate drive. Use a star-ground topology with PGND and AGND meeting at a single point near the IC exposed pad. The feedback resistor divider should be located close to the FB pin with the ground side of R2 returning to AGND.
Do not exceed 40V on VIN — even brief transients above this rating can damage the internal high-side MOSFET. Do not omit the bootstrap capacitor; without it, the high-side gate drive will fail and the regulator will not start. Avoid routing sensitive analog signals (FB trace) near the SW node to prevent noise injection; keep the FB trace short and guarded by ground. Always populate the EN pin with a defined logic level — leaving it floating can result in unreliable startup behavior.
Use a continuous ground plane on the top and bottom layers connected through multiple vias near the exposed pad. Place the power inductor and input/output capacitors on the same side of the PCB as the IC to minimize loop area; keep the SW node copper area small to reduce EMI radiation. Maintain at least 0.5 mm clearance between the SW node and any low-voltage analog traces. Vias in the SW path should be avoided where possible, as parasitic inductance degrades switching performance.
合規資訊
RoHS compliant per Diodes Incorporated product page. Lead-free SO-8EP package. Not AEC-Q100 qualified — automotive applications should select AEC-Q100-qualified parts. REACH compliance declared by manufacturer.
