RP550 系列
双路 1A带同步整流器功能的PWM/VFM降压DC/DC转换器
RP550 系列
双路 1A带同步整流器功能的PWM/VFM降压DC/DC转换器
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概述
The RP550 Series are dual output CMOS-based PWM/VFM step-down DC/DC converters with synchronous rectifier. RP550 can be selected from two control types by input signal to the MODE pin - forced PWM control or PWM/VFM auto switching control in which mode automatically switches to high-efficiency VFM mode in low output current. RP550 includes a soft start circuit, an under-voltage lockout circuit (UVLO), thermal shutdown circuit and a latch protection circuit. By simply using an inductor, resistors and capacitors as external components, a high-efficiency step-down DC/DC converter can be easily configured. The small inductor (2.2 µH) and output capacitor (10 µF) can be used by the switching of 2.25 MHz.
规格
| 消费 | 工业 | 车载 | |
|---|---|---|---|
| 输入电压范围 | 2.3 V to 5.5 V (6.5 V) | ||
| 工作温度范围 | -40°C to 85°C (125°C) | -40°C to 105°C (150°C) | -40°C to 105°C (150°C) |
| 电源电流 | Typ. 45 µA (VFM, no load, per channel) | ||
| 待机电流 | Typ. 0 µA | ||
| 输出电压范围 | 0.6 V to 3.3 V | ||
| 反馈电压 | 0.6 V | ||
| 反馈电压精度 | ±9 mV | ||
| 反馈电压温度系数 | ±100 ppm/°C | ||
| 输出电流 | 1 A x 2ch | ||
| 驱动器导通电阻 | Typ. Pch. 0.25 Ω, Nch. 0.21 Ω (VIN = 3.6 V) | ||
| 振荡器频率 | Typ. 2.25 MHz | Typ. 2.3 MHz | Typ. 2.3 MHz |
| 最大占空比 | Min. 100% | ||
| 封装 | DFN(PL)2730-12 | DFN3030-12 | DFN3030-12 |
保护回路/功能
| TSD | OCP | OVP | UVLO | OVLO | Reverse | Shutdown | Soft Start | SSCG | PGOOD | Auto Discharge | Anti-ringing | Sequencing | Max Duty | Ext. Phase | LED Adjust |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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功能说明
| TSD | 热关断电路 |
|---|---|
| OCP | 过流保护 注：以前标记为“ILX”的功能现在改为“OCP”。 |
| OVP | 过压保护 |
| UVLO | 欠压锁定功能 |
| OVLO | Overvoltage Lockout Protection |
| Reverse | 反向电流保护电路 |
| Shutdown | 关机功能 |
| Soft Start | 软启动功能 |
| SSCG | Spread Spectrum Clock Generator Function |
| PGOOD | Power Good Output |
| Auto Discharge | 自动放电功能 |
| Anti-ringing | Anti-ringing Switch Function |
| Sequencing | Start-up Sequencing Control |
| Max Duty | 最大占空比 |
| Ext. Phase | 外部可调相位补偿 |
| LED Adjust | LED High-speed Dimming Control |
技术资料
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Typical Application
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RP550K001A Efficiency vs. Output Current (VOUT=3.3V)
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相关信息
品质&封装
| 产品名称 | 对应 | 封装 | 标注 | 信赖性 |
|---|---|---|---|---|
| RP550K001A-TR |
|
DFN(PL)2730-12 | RP550K | RP550K |
| RP550L001B-TR-Y |
|
DFN3030-12 | RP550L | RP550L-Y |
| RP550L001B-TR-A |
|
DFN3030-12 | RP550L | RP550L-A |
- 有关产品的详细信息，请参见数据表。
- 封装文件或数据表包括封装尺寸，卷带规格，卷带盘尺寸，功耗和建议的焊盘图案。
常问问题
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