TPS65270
- Wide Input Supply Voltage Range: 4.5 V to 18 V
- 0.8 V, ±1% Accuracy Reference
- Up to 2-A (Buck 1) and 3-A (Buck 2) Maximum Continuous Output Loading Current
- Low-Power Pulse Skipping Mode to Achieve High Light Load Efficiency
- Adjustable Switching Frequency 300 kHz to 1.4 MHz Set by External Resistor
- Startup With a Prebiased Output Voltage
- Dedicated Enable and Soft Start for Each Buck
- Peak Current-Mode Control With Simple Compensation Circuit
- Cycle-by-Cycle Overcurrent Protection
- 180° Out-of-Phase Operation to Reduce Input Capacitance and Power Supply Induced Noise
- Available in 24-Lead Thermally Enhanced HTSSOP (PWP) and VQFN 4-mm × 4-mm (RGE) Packages
The TPS65270 is a monolithic, dual synchronous buck regulator with a wide operating input voltage that can operate in 5-V, 9-V, 12-V, or 15-V bus voltages and battery chemistries. The converters are designed to simplify its application while giving the designer the option to optimize their usage according to the target application.
The TPS65270 features a precision 0.8-V reference and can produce output voltages up to 15 V. Each converter features an enable pin that allows dedicated control of each channel that provides flexibility for power sequencing. Soft-start time in each channel can be adjusted by choosing different external capacitors. TPS65270 is also able to start up with a prebiased output. The converter begins switching when output voltage reaches the prebiased voltage.
Constant frequency peak current-mode control simplifies the compensation and provides fast transient response. Cycle-by-cycle overcurrent protection and hiccup mode operation limits MOSFET power dissipation in short-circuit or overloading fault conditions. Low-side reverse current protection also prevents excessive sinking current from damaging the converter.
The switching frequency of the converters can be set from 300 KHz to 1.4 MHz with an external resistor. Two converters have 180° out-of-phase clock signals to minimize the input filter requirements and alleviate EMI and input capacitor requirements.
TPS65270 also features a light-load pulse skipping mode (PSM). The PSM mode allows a power loss reduction on the input power supplied to the system at light loading in order to achieve light-load high efficiency.
The TPS65270 is available in a 24-pin, thermally enhanced HTSSOP (PWP) package and 24-pin VQFN (RGE) package.
技術資料
| 種類 | タイトル | 最新の英語版をダウンロード | 日付 | |||
|---|---|---|---|---|---|---|
| * | データシート | TPS65270 4.5-V to 18-V Input Voltage, 2-A or 3-A Output Current, Dual Synchronous Step-Down Regulator With Integrated MOSFET データシート (Rev. E) | PDF | HTML | 2016年 8月 31日 | ||
| EVM ユーザー ガイド (英語) | TPS65270 Buck Converter Evaluation Module User's Guide (Rev. C) | PDF | HTML | 2021年 5月 25日 | |||
| アプリケーション・ノート | Measure Power Stage Gain and Slope Compensation in PCM (Peak Current Mode) BUCK (Rev. A) | PDF | HTML | 2019年 4月 1日 | |||
| セレクション・ガイド | 電源 IC セレクション・ガイド 2018 (Rev. R 翻訳版) | 英語版 (Rev.R) | 2018年 9月 13日 | |||
| アプリケーション・ノート | TPS65270 Loop Compensation Design Consideration | 2012年 3月 29日 |
設計および開発
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TPS65270EVM — TPS65270 High Current, Synchronous Step Down Dual Buck DC/DC Converter Evaluation Module
The TPS65270EVM evaluation module is designed to provide access to the features of the TPS65270. The TPS65270 PMIC is designed to provide 2-A and 3-A continuous currents with an operational range of 4.5 V to 16 V and an externally set switching frequency ranging from 300 kHz to 1.4 MHz. When the (...)
TPS65270 TINA-TI Average Reference Design
TPS65270 Unencrypted PSpice Average Model Package (Rev. A)
| パッケージ | ピン数 | CAD シンボル、フットプリント、および 3D モデル |
|---|---|---|
| HTSSOP (PWP) | 24 | Ultra Librarian |
| VQFN (RGE) | 24 | Ultra Librarian |
購入と品質
- RoHS
- REACH
- デバイスのマーキング
- リード端子の仕上げ / ボールの原材料
- MSL 定格 / ピーク リフロー
- MTBF/FIT 推定値
- 使用原材料
- 認定試験結果
- 継続的な信頼性モニタ試験結果
- ファブの拠点
- 組み立てを実施した拠点