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RT7255A PDF预览

RT7255A

更新时间: 2024-02-28 16:34:48
品牌 Logo 应用领域
立锜 - RICHTEK /
页数 文件大小 规格书
17页 1292K
描述
暂无描述

RT7255A 技术参数

Status:PreviewVin (min) (V):4.3
Vin (max) (V):18Number of Outputs:1
Vout (min) (V):0.6Vout (max) (V):8
Preset Vout (V):Output Adj. Method:Resistor
Iout (max) (A):1.5Current Limit (typ) (A):2.2
Freq (typ) (kHz):500Freq (min) (kHz):
Freq (max) (kHz):Ext Sync:No
Ron_HS (typ) (mOhm):230Ron_LS (typ) (mOhm):130
Iq (typ) (mA):0.5Features:ACOT Control;Adjustable Soft-Start;Built-in Bootstrap Switch;Cycle-by-Cycle Current Limit;Fast Transient Response;Force PWM;Stable with Ceramic Capacitor;UVP
Package Type:TSOT-28

RT7255A 数据手册

 浏览型号RT7255A的Datasheet PDF文件第1页浏览型号RT7255A的Datasheet PDF文件第2页浏览型号RT7255A的Datasheet PDF文件第3页浏览型号RT7255A的Datasheet PDF文件第5页浏览型号RT7255A的Datasheet PDF文件第6页浏览型号RT7255A的Datasheet PDF文件第7页 
RT7255  
Absolute Maximum Ratings (Note 1)  
VIN to GND -------------------------------------------------------------------------------------------------------------0.3V to 20V  
SW to GND -------------------------------------------------------------------------------------------------------------0.3V to 20V  
<10ns---------------------------------------------------------------------------------------------------------------------5V to 25V  
BOOT to GND----------------------------------------------------------------------------------------------------------0.3V to 26V  
BOOT to SW------------------------------------------------------------------------------------------------------------0.3V to 6V  
Other Pins---------------------------------------------------------------------------------------------------------------0.3V to 6V  
Power Dissipation, PD @ TA = 25C  
TSOT-23-8--------------------------------------------------------------------------------------------------------------0.68W  
Package Thermal Resistance  
(Note 2)  
TSOT-23-8, JA --------------------------------------------------------------------------------------------------------145.5C/W  
TSOT-23-8, JC--------------------------------------------------------------------------------------------------------13.6C/W  
Lead Temperature (Soldering, 10 sec.)--------------------------------------------------------------------------260C  
Junction Temperature------------------------------------------------------------------------------------------------150C  
Storage Temperature Range---------------------------------------------------------------------------------------65C to 150C  
ESD Susceptibility  
(Note 3)  
HBM (Human Body Model) -----------------------------------------------------------------------------------------2kV  
Recommended Operating Conditions  
(Note 4)  
Supply Input Voltage -------------------------------------------------------------------------------------------------4.3V to 18V  
Ambient Temperature Range---------------------------------------------------------------------------------------40C to 85C  
Junction Temperature Range --------------------------------------------------------------------------------------40C to 125C  
Electrical Characteristics  
(VIN = 12V, TA = 25C, unless otherwise specified)  
Parameter  
Symbol  
ISHDN  
IQ  
Test Conditions  
VEN = 0V  
Min Typ Max Unit  
Supply Current (Shutdown)  
Supply Current (Quiescent)  
--  
--  
--  
12  
--  
A  
VEN = 2V, VFB = 1V  
VBST SW = 4.8V  
PVIN = 5V  
0.5  
230  
130  
2.2  
500  
90  
mA  
High-Side RDS(ON)_H  
--  
--  
Switch-On Resistance  
m  
Low-Side RDS(ON)_L  
--  
--  
Current Limit  
ILIM  
Valley current  
1.7  
--  
2.8  
--  
A
kHz  
%
Oscillator Frequency  
Maximum Duty Cycle  
Minimum On-Time  
fSW  
DMAX  
tON_MIN  
VFB  
--  
--  
--  
60  
--  
ns  
Feedback Threshold Voltage  
591 600 609  
mV  
Logic-High VEN_H  
Logic-Low VEN_L  
1.5  
--  
--  
--  
--  
Enable Input Voltage  
V
V
0.4  
VIN Under-Voltage Lockout  
Threshold-Rising  
VUVLO  
3.55 3.9 4.25  
Copyright © 2017 Richtek Technology Corporation. All rights reserved.  
is a registered trademark of Richtek Technology Corporation.  
www.richtek.com  
4
DS7255-01 November 2017  

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