產品一覽
ARG81800超低Iq、寬廣輸入、2.4MHz、1A同步降壓穩壓器
Allegro MicroSystems
ARG81800同步降壓穩壓器具有超低靜態電流、SYNCIN、CLKOUT和PGOOD
Allegro MicroSystems的ARG81800包含所有控制和保護電路，可打造出具有±1.5%輸出電壓準確度的PWM 穩壓器。本產品具有超低的靜態電流，可在極輕的負載調節期間以最小的電源消耗實現保持活動的電源操作。
ARG81800提供500mA和1A版本，因此可針對電流較低的系統最佳化電源元件的實體尺寸，進而縮小PCB 面積並節省成本。可以在寬廣範圍內對PWM開關頻率進行編程，以平衡效率、元件尺寸和EMC效能。如果VIN衰變且工作週期達到最大值，則ARG81800會自動折回其 PWM頻率以延長工作週期並維持VOUT。
ARG81800採用低功率 (LP) 模式，可在空載或極輕負載條件下維持輸出電壓，而僅從VIN消耗幾微安培的電流。元件包含一個PWM/AUTO控制引腳，因此系統可以將此引腳分別設為高電位或低電位，藉此動態強制PWM或AUTO模式。
如果SYNCIN引腳由外部時脈驅動，則ARG81800將強制進入PWM模式並與輸入時脈同步。ARG81800到SYNCIN時脈的頻率抖動可降低EMI/EMC。本產品提供一個CLKOUT引腳，因此下游穩壓器可透過其同步輸入輕鬆進行交錯和抖動處理。
| Part Number | 輸出類型 | 輸出數 / 同步整流器 | 輸入電壓 | 輸出電壓 | 輸出電流 | 頻率 - 切換 | 工作溫度 | 安裝類型 | 封裝／外殼 | 元件封裝 |
|---|---|---|---|---|---|---|---|---|---|---|
| ARG81800KESJSR | 可調式 | 1 / 是 | 3.5V~36V | 0.8V~36V | 1A | 250kHz ~ 2.4MHz | -40°C~150°C (TJ) | 表面黏著、可沾濕測邊 | 20-WFQFN 裸焊盤 | 20-QFN (4x4) |
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Datasheet Download on Jun, 2019
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