RP550 系列 | 日清纺微电子

概述

The RP550 Series are dual output CMOS-based PWM/VFM step-down DC/DC converters with synchronous rectifier. RP550 can be selected from two control types by input signal to the MODE pin - forced PWM control or PWM/VFM auto switching control in which mode automatically switches to high-efficiency VFM mode in low output current. RP550 includes a soft start circuit, an under-voltage lockout circuit (UVLO), thermal shutdown circuit and a latch protection circuit. By simply using an inductor, resistors and capacitors as external components, a high-efficiency step-down DC/DC converter can be easily configured. The small inductor (2.2 µH) and output capacitor (10 µF) can be used by the switching of 2.25 MHz.

规格

	消费	工业	车载
输入电压范围	2.3 V to 5.5 V (6.5 V)
工作温度范围	-40°C to 85°C (125°C)	-40°C to 105°C (150°C)	-40°C to 105°C (150°C)
电源电流	Typ. 45 µA (VFM, no load, per channel)
待机电流	Typ. 0 µA
输出电压范围	0.6 V to 3.3 V
反馈电压	0.6 V
反馈电压精度	±9 mV
反馈电压温度系数	±100 ppm/°C
输出电流	1 A x 2ch
驱动器导通电阻	Typ. Pch. 0.25 Ω, Nch. 0.21 Ω (VIN = 3.6 V)
振荡器频率	Typ. 2.25 MHz	Typ. 2.3 MHz	Typ. 2.3 MHz
最大占空比	Min. 100%
封装	DFN(PL)2730-12	DFN3030-12	DFN3030-12

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

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

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

用以下条件检索类似商品

分类：DC / DC开关稳压器

	拓扑结构	Buck
	输入电压 min (V)	2.3
	输入电压 max (V)	5.5
	输出电压 min (V)	0.6
	输出电压 max (V)	3.3
	输出电流 (mA)	1000
	消费电流 (µA)	90

技术资料

Typical Application
RP550K001A Efficiency vs. Output Current (VOUT=3.3V)
相关信息
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Min Input Voltage

[V]

Max Input Voltage

[V]

Output Voltage

[V]

Max Output Current

[A]

Buck

Boost

Buck-Boost

Inverting

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