R1223 系列
13.2V输入PWM/VFM降压DC/DC控制器
R1223 系列
13.2V输入PWM/VFM降压DC/DC控制器
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概述
The R1223 Series are CMOS-based PWM/VFM step-down DC/DC controller with an external output transistor. By simply using a power transistor, an inductor, a diode, and capacitors as external components, a high-efficiency step-down DC/DC converter can be easily configured. The PWM/VFM alternative circuit automatically switches to VFM control in the smaller output current range and provides high efficiency even in the smaller output current range. The version with fixed PWM control is available. The current limit protection circuit can be selected from reset type or latch type.
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规格
消费 输入电压范围 2.3 V to 13.2 V (15.0 V) 工作温度范围 -40°C to 85°C (125°C) 电源电流 Typ. 100 µA (R1223Nxx2A/C/E/G)
Typ. 140 µA (R1223Nxx2B/D/F/H)待机电流 Typ. 0 µA 输出电压范围 1.5 V to 5.0 V (0.1 V step) 输出电压精度 ±2% (Ta = 25°C) 输出电压温度系数 Typ. ±100 ppm/°C 振荡器频率 Typ. 300 kHz, 500 kHz 效率 Typ. 90% 封装 SOT-23-5 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 -
技术资料
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Typical Application
L: 27µH, CIN: 10µF×2, COUT: 47µ
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R1223N332A Efficiency vs. Output Current
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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 |
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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 |