R1276 系列
3A 30V输入带同步整流器功能的降压DC/DC转换器
R1276 系列
3A 30V输入带同步整流器功能的降压DC/DC转换器
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概述
The R1276 is a 36-V rated synchronous step-down DC/DC converter with built-in transistor. Under cranking condition, the switching frequency is automatically reduced to keep output voltage level constant.
特点
- High efficiency of 95%
- Maintains the output voltage constant at cranking by reducing a switching frequency to the minimum 1/4.
- Achieves the EMI noise reduction by using a spread spectrum clock generator. (Diffusion Rate: +10%).
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规格
消费 工业 车载 输入电压范围 3.6 V to 30.0 V (36.0 V) 工作温度范围 -40°C to 105°C (125°C) -40°C to 125°C (150°C) -40°C to 125°C (150°C) 电源电流 Typ. 12 µA (VFM, at no switching) 待机电流 Typ. 4 µA 启动电压 4.5 V 输出电压范围 Externally Adjustable: 0.7 V to 6.5 V 反馈电压 0.64 V 反馈电压精度 ±1.0% 输出电流 3 A 驱动器导通电阻 High-side: Typ. 0.145 Ω
Low-side: Typ. 0.095 Ω振荡器频率 250 kHz to 1 MHz (Settable with external resistors)*1 效率 95% 封装 HSOP-18 - *1: In the case of 0.7 V ≤ VOUT < 3.3 V, the configurable range is 250 kHz ≤ fOSC ≤ 600 kHz.
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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Efficiency Characteristics (VOUT = 5V)
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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 |