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.
技术文档
| 顶层文档 | 类型 | 标题 | 格式选项 | 下载最新的英语版本 | 日期 | |
|---|---|---|---|---|---|---|
| * | 数据表 | TPS65270 4.5-V to 18-V Input Voltage, 2-A or 3-A Output Current, Dual Synchronous Step-Down Regulator With Integrated MOSFET 数据表 (Rev. E) | PDF | HTML | 2016-8-31 | ||
| 应用手册 | Measure Power Stage Gain and Slope Compensation in PCM (Peak Current Mode) BUCK (Rev. A) | PDF | HTML | 2019-4-1 | |||
| 选择指南 | 电源管理指南 2018 | 2018-7-31 | ||||
| 应用手册 | TPS65270 Loop Compensation Design Consideration | 2012-3-29 |
设计与开发
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TPS65270EVM — TPS65270 高电流、降压双路降压 DC/DC 转换器评估模块
TPS65270EVM 评估模块用于提供对 TPS65270 功能的访问权限。TPS65270 PMIC 可以提供 2-A 和 3-A 持续电流，工作范围为 4.5V 至 16V，外部设定的开关频率范围为 300kHz 至 1.4MHz。当 PMIC 未完全加载，降压 1 可加载至 2.5 A，而降压 2 可加载至 3.5 A。
| 封装 | 引脚 | CAD 符号、封装和 3D 模型 |
|---|---|---|
| HTSSOP (PWP) | 24 | Ultra Librarian |
| VQFN (RGE) | 24 | Ultra Librarian |
订购和质量
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