ADP2370ACPZ-R7 - 800mA, 15V Buck DC-DC Converter | Analog Devices
部品番号: ADP2370ACPZ-R7 ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $3.62 | $3.62 |
| 10 | $3.1 | $31.00 |
| 100 | $2.49 | $249.00 |
| 500 | $2.05 | $1,025.00 |
| 1,000 | $1.78 | $1,780.00 |
| 3,000 | $1.55 | $4,650.00 |
ADP2370ACPZ-R7 概要
A buck (step-down) DC-DC converter is a switching voltage regulator that uses an inductor, a switch, and a rectifier to convert a higher input voltage to a lower output voltage with high efficiency. The buck converter sits within the broader hierarchy of DC-DC converters -> switching regulators -> voltage regulators -> power management ICs -> semiconductors. By cycling the internal MOSFETs at high frequency and filtering with an LC network, a buck converter achieves efficiencies typically above 90 percent, vastly superior to linear regulators at large input-to-output voltage differentials.
Key features of the ADP2370 include up to 800 mA of continuous output current, 92 percent peak efficiency at 1.2 MHz operation, low quiescent current for extended battery life, internal compensation, internal soft start, power-good output, and thermal shutdown. The device integrates high-side and low-side MOSFETs, eliminating the need for external switching transistors. Forced PWM (FPWM) mode maintains a constant switching frequency for noise-sensitive applications, while automatic PWM/PFM mode maximizes efficiency at light loads.
The ADP2370 uses peak current-mode control with internal slope compensation, providing excellent line and load transient response across the full operating range. The internal reference is a high-accuracy bandgap with low temperature coefficient. Power-good indication, undervoltage lockout, and overcurrent protection are all integrated, reducing external component count to three (input capacitor, inductor, output capacitor). The exposed pad on the LFCSP-8 package provides a low thermal resistance path, enabling full 800 mA output even in compact designs.
Typical applications include portable and battery-powered equipment, handheld instrumentation, point-of-load regulators for FPGAs, DSPs, and microcontrollers, automotive infotainment and telematics subsystems (non-safety-critical rails), industrial control boards, and distributed power systems. The wide 3.2 V to 15 V input range accommodates single-cell Li-ion, USB, 5 V and 12 V rails, making the device particularly versatile for mixed-rail designs.
When designing with the ADP2370, select an inductor with low DCR to preserve efficiency and keep the input/output ceramic capacitors close to the IC to minimize parasitic inductance. For noise-sensitive analog loads, operate in FPWM mode to avoid PFM switching ripple; for battery-powered systems, leave PFM enabled to maximize efficiency at light load. The exposed pad must be soldered to a sufficient copper pour for thermal dissipation.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet. Verified distributor data is current as of 2026-10-06, and all specifications come from the Analog Devices ADP2370/ADP2371 datasheet.
ドロップイン代替品: ADP2370ACPZ-R7 — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
クイック比較ツール — 並列比較する代替部品を選択:
ADP2370ACPZ-3.3-R7
✅ ドロップイン📋 参考代替品（カタログ未掲載）
ADP2370ACPZ-5.0-R7
✅ ドロップイン📋 参考代替品（カタログ未掲載）
ADP2371ACPZ-R7
✅ ドロップイン📋 参考代替品（カタログ未掲載）
ADP2370ACPZ-R7
✅ ドロップイン✓ 在庫あり
$1.55 / 個
データシートを見る →ADP2370ACPZ-R7 最大定格＆電気的特性
| トポロジー | Synchronous Buck (Step-Down) |
| 入力電圧範囲 | 3.2 V to 15 V |
| 出力電圧範囲 | 0.8 V to 14 V (Adjustable) |
| Continuous Output Current | 800 mA |
| スイッチング周波数 | 600 kHz or 1.2 MHz (FSEL selectable) |
| External Sync Range | 600 kHz to 1.2 MHz |
| Peak Efficiency | 92% (typical at 1.2 MHz, 5 V to 3.3 V) |
| Control Mode | Peak Current-Mode PWM, optional PFM at light load |
| Internal MOSFETs | Yes (high-side and low-side, integrated) |
| パワーグッド出力 | Yes |
| ソフトスタート | Internal |
| 熱シャットダウン | Yes |
| Undervoltage Lockout | Yes |
| 動作温度範囲 | -40C to +125C |
| パッケージ | 8-pin LFCSP-EP (CP-8-13) 3 mm x 3 mm |
| 実装タイプ | Surface Mount |
| MSLレベル | 3 (168 hours) |
| RoHS ステータス | Compliant |
| Forced PWM Mode | Yes (FPWM via SYNC/MODE pin) |
ADP2370ACPZ-R7 ピン構成
| ピン 1 | AGND — Analog ground reference for internal control circuitry |
| ピン 2 | VIN — Input supply voltage (3.2 V to 15 V) |
| ピン 3 | SW — Switch node - connect to power inductor |
| ピン 4 | SW — Switch node - connect to power inductor (tied to pin 3) |
| ピン 5 | PGND — Power ground return for internal low-side MOSFET |
| ピン 6 | FB — Feedback input - connect to resistor divider for adjustable VOUT |
| ピン 7 | EN — Enable input (active high) |
| ピン 8 | FSEL/SYNC — Frequency select / external sync input |
| ピン EP | EP — Exposed pad - thermal and electrical ground, must be soldered to PCB |
主な用途
ADP2370ACPZ-R7 の用途: 6 件s: Portable Battery-Powered Equipment, Point-of-Load Regulators for MCUs and DSPs, Industrial Control and Instrumentation, Automotive Infotainment and Telematics, Distributed Power and Intermediate Bus Systems, FPGA and Processor Auxiliary Rails.
Portable Battery-Powered Equipment
The ADP2370ACPZ-R7 fits portable battery-powered equipment because its 3.2 V to 15 V input range covers single-cell Li-ion (3.7 V nominal), 5 V USB rails, and 12 V wall adapters. The low quiescent current and automatic PFM mode at light load extend battery life, while the 92% peak efficiency reduces heat in handheld designs. Placed between the battery and downstream rails (3.3 V MCU, 1.8 V sensor, 1.2 V core), the device powers handheld instruments, wireless sensor nodes, and battery-charged IoT devices. The 3 mm x 3 mm LFCSP-EP footprint preserves small PCB area.
おすすめ
Point-of-Load Regulators for MCUs and DSPs
The ADP2370ACPZ-R7 is well-suited as a point-of-load regulator for microcontrollers, DSPs, and FPGAs that require clean, fast-transient sub-rails. Its peak current-mode control provides excellent line and load transient response, and the integrated power-good output enables sequencing with adjacent rails. Placed adjacent to the processor's VDD pin with a 10 uF input capacitor and a 4.7 uH inductor, it produces a 1.2 V or 3.3 V core rail. The 600 kHz / 1.2 MHz frequency selection allows tuning against system noise budgets.
おすすめ
Industrial Control and Instrumentation
The ADP2370ACPZ-R7 fits industrial control boards because its wide 3.2 V to 15 V input range directly accepts 5 V and 12 V industrial buses, eliminating the need for upstream regulation. The -40C to +125C operating temperature range and integrated protection features (UVLO, OCP, thermal shutdown) suit factory-floor and outdoor environments. Placed on a PLC analog-input board, it powers ADC references and signal-conditioning op-amps. The exposed-pad package ensures reliable thermal performance at full 800 mA load across temperature.
おすすめ
Automotive Infotainment and Telematics
The ADP2370ACPZ-R7 powers non-safety-critical rails in automotive infotainment, telematics, and body-electronics modules where its 12 V input range matches vehicle bus voltages. The device is not AEC-Q100 qualified, so designers should reserve it for non-safety head units, displays, and gateway controllers rather than ADAS or chassis systems. The forced PWM (FPWM) mode maintains constant switching frequency, reducing AM-band interference in radio-equipped vehicles. Placed between the 12 V bus and downstream 5 V/3.3 V rails, it powers CAN transceivers, Bluetooth/Wi-Fi modules, and display controllers.
おすすめ
Distributed Power and Intermediate Bus Systems
The ADP2370ACPZ-R7 works as a downstream point-of-load converter in distributed power architectures where a 12 V intermediate bus supplies multiple local rails. Its 92% peak efficiency at 12 V to 3.3 V conversion minimizes thermal dissipation in densely populated backplanes, and its small footprint enables many parallel regulators on a single board. Placed on a PCIe card, telecom blade, or server riser, it powers local logic and memory rails. The 600 kHz operation minimizes switch-node ringing when driving long PCB traces.
おすすめ
FPGA and Processor Auxiliary Rails
The ADP2370ACPZ-R7 is appropriate for FPGA and processor auxiliary rails such as 1.8 V, 2.5 V, and 3.3 V where its 800 mA capacity handles moderate loads including memory banks and I/O voltage rails. Peak current-mode control yields tight regulation during load steps, important for multi-channel memory interfaces. The power-good output signals the host processor when each rail is in regulation, supporting multi-rail sequencing. Placed near the FPGA bank power pin with a 4.7 uH inductor, it provides a quiet 1.8 V supply.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: ADP2370ACPZ-R7 — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | ADP2370ACPZ-3.3-R7 | ADP2370ACPZ-5.0-R7 | ADP2371ACPZ-R7 |
|---|---|---|---|---|
| Package | 8-pin LFCSP-EP 3x3 mm | 8-pin LFCSP-EP 3x3 mm - same | 8-pin LFCSP-EP 3x3 mm - same | 8-pin LFCSP-EP 3x3 mm - same |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Input Voltage Range | 3.2 V to 15 V | 3.2 V to 15 V | 3.2 V to 15 V | 3.2 V to 15 V |
| Output Voltage | 0.8 V to 14 V (Adjustable) | 3.3 V Fixed | 5.0 V Fixed | 0.8 V to 14 V (Adjustable) |
| Output Current | 800 mA | 800 mA | 800 mA | 800 mA |
| Switching Frequency | 600 kHz / 1.2 MHz (FSEL) | 600 kHz / 1.2 MHz (FSEL) | 600 kHz / 1.2 MHz (FSEL) | 600 kHz / 1.2 MHz (FSEL) |
| Peak Efficiency | 92% | 92% | 92% | 90% (lower IQ optimized) |
| Quiescent Current Profile | Standard (battery-friendly) | Standard | Standard | Ultra-low for sleep-mode |
| Output Type | Adjustable (external resistor divider) | Fixed 3.3 V | Fixed 5.0 V | Adjustable |
主な差別化要因
- Adjustable output with widest range in 3x3 LFCSP family （vs ADP2370ACPZ-3.3-R7)
- Standard quiescent current optimized for most applications （vs ADP2371ACPZ-R7)
- Industry-standard 8-pin LFCSP footprint for easy second-sourcing （vs TPS62177 (Texas Instruments))
設計ノート
Place the input capacitor (10 uF X7R ceramic minimum) as close to VIN and PGND pins as possible. Route the SW node traces as short and wide to minimize parasitic inductance that causes voltage ringing and EMI. Use a continuous ground plane on the layer beneath the IC, and tie the exposed pad directly to this ground plane with multiple thermal vias for heat dissipation.
Estimated: at VIN = 12 V, VOUT = 3.3 V, and IOUT = 800 mA, power dissipation is approximately (12 - 3.3) * 0.8 = 6.96 W if linear, but actual buck dissipation is roughly VIN * IQ + (VOUT / VIN efficiency factor). Real dissipation in the FETs is about 0.4 W at this operating point. At VIN = 12 V, VOUT = 1.2 V, IOUT = 800 mA, the high-side FET dissipation rises. Always design with the LFCSP-EP exposed pad soldered to a minimum 1 square inch copper pour to keep junction temperature below 125 C.
Do not operate below the 3.2 V minimum input voltage; below this threshold UVLO triggers and output collapses. Avoid using output capacitors with insufficient voltage rating - 6.3 V minimum X7R ceramic is recommended for 5 V outputs. Do not leave FB floating on the adjustable version; a floating FB pin causes output voltage to drift to the upper limit. For noise-sensitive analog loads, force PWM mode to avoid PFM ripple, accepting slightly lower light-load efficiency.
コンプライアンス情報
RoHS and lead-free compliant per Analog Devices product page. Not AEC-Q100 qualified; for safety-critical automotive applications, use a qualified equivalent from TI, NXP, or Infineon.
