RP505 系列
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 RP505 Series are low supply current CMOS-based PWM/VFM step-down DC/DC converters with synchronous rectifier. RP505 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. The xx1A/B version with an internally fixed output voltage type and the 001C version with an externally adjustable output voltage type are available.
RP505 includes a soft start circuit, an under-voltage lockout circuit (UVLO), thermal shutdown circuit and a latch protection circuit. By simply using an inductor and capacitors (and resistors) as external components, a high-efficiency step-down DC/DC converter can be easily configured. The small inductor (2.2µH) and output capacitor (10µF) can be used by the switching of 2.25MHz. A 2mm square compact DFN(PL)2020-8 package is available.
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规格
消费 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) 电源电流 Typ. 40 µA (VFM, no load) 待机电流 Typ. 0 µA 输出电压范围 Internally Fixed Ver.: 0.6 V to 3.3 V (0.1 V step)
Externally Adjustable Ver.: 0.8 V to 3.3 V输出电压精度 ±1.5% (VOUT ≥ 1.2 V, Ta = 25°C)
±18 mV (VOUT < 1.2 V)输出电压温度系数 ±100 ppm/°C 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 驱动器导通电阻 Pch: Typ. 0.23 Ω, Nch: Typ. 0.20 Ω (VIN = 3.6 V) 振荡器频率 Typ. 2.25 MHz 最大占空比 Min. 100% 封装 DFN(PL)2020-8 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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RP505Kxx1A/B Typical Application
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RP505K001C Typical Application
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RP505K331x Efficiency vs. Output Current
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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 RP505Kxx1x-TR DFN(PL)2020-8 RP505K RP505K - 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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下载数据表
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 |