R5220 系列

400mA带开关功能的PWM降压DC/DC转换器

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概述

The R5220 Series are CMOS-based PWM step-down DC/DC converters with synchronous rectifier. R5220 also has the function of switching to the LDO regulator. By switching with the MODE pin, the device can be used as an LDO regulator (Output Current 50mA) in the smaller output current range, while it can be used as a DC/DC converter (Output Current 400mA*) under high load conditions. (The polarity of the MODE pin is selectable.) The DC/DC converter contains an under-voltage lockout circuit (UVLO), a soft start circuit, and a latch type protection circuit. By simply using an inductor and a capacitor, a high-efficiency DC/DC converter can be easily configured.

*) This is an approximate value, because output current depending on conditions and external parts.

规格

	消费
输入电压范围	2.8 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. 350 µA (DC/DC operation) Typ. 5.0 µA (LDO operation)
待机电流	Typ. 0.1 µA
输出电压范围	1.0 V to 3.3 V (0.1 V step)
输出电压精度	±2% (VOUT ≥ 1.5 V, Ta = 25°C) ±30 mV (VOUT < 1.5 V)
输出电流	400 mA (DC/DC operation) 50 mA (LDO operation)
驱动器导通电阻	Pch: 0.5 Ω, Nch: 0.5 Ω (VIN = 3.6 V)
振荡器频率	Typ. 1.2 MHz
封装	DFN(PL)2514-6

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

品质&封装

产品名称	对应	封装	标注	信赖性
R5220Kxxxx-TR		DFN(PL)2514-6	R5220K	R5220K

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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