RP500 系列

600mA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 RP500 Series are low supply current CMOS-based PWM/VFM step-down DC/DC converters with synchronous rectifier. RP500 can be selected from two control types - fixed PWM control or PWM/VFM auto switching control in which mode automatically switches to high-efficiency VFM mode in low output current. RP500 includes a soft start circuit, an under-voltage lockout circuit (UVLO), and a latch protection circuit. By simply using an inductor and capacitors as external components, a high-efficiency step-down DC/DC converter can be easily configured.

规格

	消费
输入电压范围	2.55 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. 400 µA (PWM, no switching) Typ. 100 µA (VFM, no switching)
待机电流	Typ. 0 µA
输出电压范围	1.1 V to 3.3 V (0.1 V step)
输出电压精度	±1.5% (VOUT ≥ 1.6 V, Ta = 25°C) ±24 mV (VOUT < 1.6 V)
输出电压温度系数	±100 ppm/°C
输出电流	600 mA
驱动器导通电阻	Pch: Typ. 0.3 Ω, Nch: 0.38 Ω (VIN = 3.6 V)
振荡器频率	Typ. 1.2 MHz
最大占空比	Min. 100%
封装	DFN(PL)1820-6, SOT-23-6W

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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
RP500KxxxA-TR		DFN(PL)1820-6	RP500K	RP500K
RP500NxxxA-TR-FE		SOT-23-6W	RP500N	RP500N-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