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.

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

下载数据表

TSD	ILX	OCP	OVP	UVLO	OVLO	Reverse	Shutdown	Soft Start	SSCG	PGOOD	Auto Discharge	Anti-ringing	Sequencing	Max Duty	Ext. Phase	LED Adjust

功能说明

技术资料
- Typical Application
  
  L: 27µH, CIN: 10µF×2, COUT: 47µ
- R1223N332A Efficiency vs. Output Current

品质&封装

产品名称	对应	封装	标注	信赖性
R1223Nxx2x-TR-FE		SOT-23-5	R1223N	R1223N-FE

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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