PWM DC/DC Controller with VID Inputs for Portable GPU Core-Voltage Regulator
ページセクションへ移動：
概要
説明
The ISL95870, ISL95870A, ISL95870B ICs are Single-Phase Synchronous-Buck PWM regulators featuring Intersil’s proprietary R4 Technology™. The wide 3. 3V to 25V input voltage range is ideal for systems that run on battery or AC-adapter power sources. The ISL95870A and ISL95870B are low-cost solutions for applications requiring dynamically selected slew-rate controlled output voltages. The soft-start and dynamic setpoint slew-rates are capacitor programmed. Voltage identification logic-inputs select four (ISL95870A, ISL95870B) resistor-programmed setpoint reference voltages that directly set the output voltage of the converter between 0. 5V and 1. 5V, and up to 5V with a feedback voltage divider. Compared with R3 modulator, the R4 modulator has equivalent light-load efficiency, faster transient performance, accurately regulated frequency control and all internal compensation. These updates, together with integrated MOSFET drivers and schottky bootstrap diode, allow for a high-performance regulator that is highly compact and needs few external components. The differential remote sensing for output voltage and selectable switching frequency are another two new functions. For maximum efficiency, the converter automatically enters diode-emulation mode (DEM) during light-load conditions such as system standby.
特長
- Input Voltage Range: 3.3V to 25V
- Output Voltage Range: 0.5V to 5V
- Precision Regulation
- Proprietary R4™ Frequency Control Loop
- ±0.5% System Accuracy Over -10°C to +100°C
- Optimal Transient Response
- Intersil's R4™ Modulator Technology
- Output Remote Sense
- Extremely Flexible Output Voltage Programmability
- 2-Bit VID Selects Four Independent Setpoint Voltages for ISL95870B
- 2-Bit VID Selects Four Dependent or Three Independent Setpoint Voltages for ISL95870A
- Simple Resistor Programming of Setpoint Voltages
- Selectable 300kHz, 500kHz, 600kHz or 1MHz PWM Frequency in Continuous Conduction
- Automatic Diode Emulation Mode for Highest Efficiency
- Power-Good Monitor for Soft-Start and Fault Detection
製品比較
アプリケーション
アプリケーション
- Mobile PC Graphical Processing Unit VCC Rail
- Mobile PC I/O Controller Hub (ICH) VCC Rail
- Mobile PC Memory Controller Hub (GMCH) VCC Rail
ドキュメント
|
|
|
|
|---|---|---|
| 分類 | タイトル | 日付 |
| データシート | PDF 938 KB 英語 | |
| カタログ | PDF 5.63 MB 英語 | |
| 製品変更通知 | PDF 294 KB | |
| 製品変更通知 | PDF 85 KB | |
| 製品変更通知 | PDF 90 KB | |
| 製品変更通知 | PDF 164 KB | |
| 製品変更通知 | PDF 171 KB | |
| 製品変更通知 | PDF 248 KB | |
| アプリケーションノート | PDF 509 KB | |
| アプリケーションノート | PDF 397 KB | |
10 items
|
||
設計・開発
ソフトウェア／ツール
ソフトウェア／ツール
| Software title
|
Software type
|
会社名
|
|---|---|---|
| iSim:PE Offline Simulation Tool iSim Personal Edition (iSim:PE) speeds the design cycle and reduces risk early in any project, identifying parts that can be used in current as well as next-generation designs.
|
Simulator | ルネサス |
1 item
|
||
モデル
ECADモデル
[製品選択]テーブル内の製品名をクリックするとSamacSysが提供する回路図シンボル、PCBフットプリント、3D CADモデルがご確認いただけます。 お探しのシンボルやモデルが見つからない場合、Webサイトから直接リクエストできます。
Processing table
Tips for Using This Parametric Table:
- Hide Filters button in header: Collapse or expands filters
- Column sort buttons in header: Sort Column alphabetically / numerically descending or ascending
- Reset button in header: Reset all filters to the page default
- Full Screen button in header: Expand the table to full screen view (user must close out of full screen before they can interact with rest of page)
- Export button in header: Export the filtered results of the table to an Excel document
- Filter parts search bar in header: Type to filter table results by part number
- Hide column button in column headers: Select to hide columns in table
- AND / OR toggle switches in header: Toggles the logic of this particular filter to be “AND” or “OR” logic for filtering results
- Multiselect checkboxes at beginning of each row in table: Select these checkboxes to compare products against each other
- Document icon next to product name in row: View the featured document for this product
- Chip icon next to the right of the document icon in row: View the block diagram for this product
- Cart icon to the right of the chip icon: Indicates that samples are available for this product
サポート
Renesas Samples
注文可能な製品番号を選択
| 発注型名 | サンプル |
|---|---|
| ISL95870BHRZ | Availability |
| ISL95870BHRZ-T | Availability |
| ISL95870BIRZ | Availability |
| ISL95870BIRZ-T | Availability |