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.
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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 ILX 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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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
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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。
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买入/样品
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线上购买
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买入/样品依赖/资料获取
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功能说明
| TSD | 热关断电路 |
|---|---|
| ILX | LX Current Limit Function |
| OCP | 过流保护 |
| 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 |