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RT8237D PDF预览

RT8237D

更新时间: 2024-02-28 02:25:44
品牌 Logo 应用领域
立锜 - RICHTEK /
页数 文件大小 规格书
17页 228K
描述
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RT8237D 技术参数

Status:PreviewVs (typ) (V):5
Vin (min) (V):4.5Vin (max) (V):26
Vout (min) (V):0.7Vout (max) (V):3.3
Preset Vout (V):Output Adj. Method:Resistor
Accuracy (+/- %):0.5Freq (typ) (kHz):290;340;380;430
Freq (min) (kHz):Freq (max) (kHz):
Iq (typ) (mA):0.5Features:Adjustable Current Limit;Adjustable Frequency;Built-in Bootstrap Switch;COT Control;Cycle-by-Cycle Current Limit;Diode Emulation Mode;Enable Input;OVP;Power Good;SCP;Selectable (PSM or PWM);UVP
Package Type:WDFN3x3-10

RT8237D 数据手册

 浏览型号RT8237D的Datasheet PDF文件第2页浏览型号RT8237D的Datasheet PDF文件第3页浏览型号RT8237D的Datasheet PDF文件第4页浏览型号RT8237D的Datasheet PDF文件第6页浏览型号RT8237D的Datasheet PDF文件第7页浏览型号RT8237D的Datasheet PDF文件第8页 
RT8237C/D  
Electrical Characteristics  
(VCC = 5V, TA = 25°C, unless otherwise specified)  
Parameter  
Symbol  
Test Conditions  
Min  
Typ  
Max  
Unit  
Input Power Supply  
FB forced above the regulation  
point, VEN = 5V,  
VCC Quiescent Supply Current IQ  
--  
500  
1250  
A  
VCC Shutdown Current  
CS Shutdown Current  
ISHDN  
VCC current, VEN = 0V  
CS pull to GND  
DEM  
--  
--  
--  
--  
1
1
A  
A  
0.7005 0.704 0.7075  
FB Error Comparator  
Threshold  
VREF  
V
DEM, TA = 40 to 85C (Note 5) 0.697 0.704 0.711  
FB INPUT BIAS CURRENT  
VFB = 0.735V  
1  
0.7  
--  
0.01  
--  
1
3.3  
--  
A  
VOUT Voltage Range  
V
RRF = 470k(Note 6)  
RRF = 200k(Note 6)  
RRF = 100k(Note 6)  
RRF = 39k(Note 6)  
290  
340  
380  
430  
400  
--  
--  
Switching Frequency  
fSW  
kHz  
ns  
--  
--  
--  
--  
Minimum Off-Time  
Current Sensing  
250  
550  
CS Source Current  
CS Source Current TC  
Zero Crossing Threshold  
ICS  
9
--  
10  
4700  
--  
11  
--  
A  
ppm/C  
mV  
DEM  
10  
280  
185  
40  
--  
5
GND PHASE, VCS = 2.4V  
GND PHASE, VCS = 1.6V  
GND PHASE, VCS = 0.4V  
PHASE GND, VCS = 2.4V  
PHASE GND, VCS = 1.6V  
PHASE GND, VCS = 0.4V  
300  
200  
50  
320  
215  
60  
--  
Current Limit Threshold  
VLIMIT  
mV  
mV  
300  
200  
50  
Negative Current Limit  
Threshold  
--  
--  
--  
--  
Protection Function  
With respect to error  
comparator threshold  
Output UV Threshold  
65  
70  
75  
%
With respect to error  
comparator threshold  
OVP Threshold  
OV Fault Delay  
120  
--  
125  
5
130  
--  
%
FB forced above OV threshold  
s  
Falling edge,  
hysteresis = 100mV, PWM  
disabled below this level  
VCC Under Voltage Lockout  
Threshold  
UVLO  
3.7  
3.9  
4.1  
V
VOUT Soft-Start  
UV Blank Time  
Thermal Shutdown  
From EN = high to VOUT = 95%  
From EN signal going high  
--  
--  
--  
1300  
3
--  
--  
--  
s  
ms  
C  
TSD  
150  
Copyright 2016 Richtek Technology Corporation. All rights reserved.  
©
is a registered trademark of Richtek Technology Corporation.  
DS8237C/D-07 September 2016  
www.richtek.com  
5

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