Electronic Components Datasheet Search
  English  ▼

Delete All
ON OFF
ALLDATASHEET.COM

X  

Preview PDF Download HTML

LR8425 Datasheet(PDF) 5 Page - Leshan Radio Company

Part No. LR8425
Description  5A, 500KHz Synchronous Boost Converter with Output Disconnect
Download  7 Pages
Scroll/Zoom Zoom In 100% Zoom Out
Maker  LRC [Leshan Radio Company]
Homepage  http://www.lrc.cn/
Logo 

LR8425 Datasheet(HTML) 5 Page - Leshan Radio Company

   
Zoom Inzoom in Zoom Outzoom out
 5 / 7 page
background image
RECOMMENDED OPERATING CONDITIONS
(5)
MIN
NOM
MAX
UNITS
Supply voltage at VIN
1.8
5.25
V
Output voltage at PVOUT, AVOUT
2.5
5.5
V
CE
0
VOUT+0.3
V
All other pins
0
5.5
V
Operating Ambient temperature range, TA
-40
85
°C
Operating junction temperature range, Tj
-40
125
°C
(5) The device is not guaranteed to function outside its operating conditions.
ELECTRICAL CHARACTERISTICS
(VCE=VIN=2.4V, VOUT=5V, IOUT=500mA, TA=25°C, unless otherwise specified)
PARAM ETER
SYM BOL
CONDITIONS
MIN
TYP
(6)
MAX
UNITS
Input VIN UVLO Threshold
VUVLO
VIN Rising
1.78
V
VIN UVLO Hysteresis
VUVLO_HYS
0.1
V
Quiescent Current
VIN
IQ
VCE=VIN=1.8V, VOUT=5V, no load,
Measured on VIN pin
10
μA
VOUT
VCE=VIN=1.8V, VOUT=5V, no load,
Measured on VOUT pin
27
μA
Shutdown Current
ISHDN
VCE=0V, VIN=2.4V
0.1
1
μA
CE High-Level Threshold
VCEH
CE Rising
1.2
V
CE Low-Level Threshold
VCEL
CE Falling
0.3
V
Soft-start time
TSS
1
ms
Linear Charge Current Limit
(7)
ICHARGE
VOUT 1V
8425A
0.75
A
8425B
1.3
A
1V<VOUT<90%VIN
8425A
0.7
A
8425B
1.2
A
Output Discharge Resistor
RDSC
For
8425A only
100
Ω
Low Side Main N-FET RON
RNDS(ON)
VOUT=5V
20
m
Ω
Synchronous P-FET RON
RPDS(ON)
VOUT=5V
40
m
Ω
Switching Frequency
FSW
500
KHz
Maximum Duty Cycle
DMAX
90
95
%
Main N-FET Current Limit
(7) (8)
ILIM1
5.0
6.5
A
Feedback Reference Voltage
VREF
1.182
1.2
1.218
V
Output Over Voltage Protection
VOVP
5.8
V
LBI Voltage Threshold
VLBI
VIN Falling
1.176
1.2
1.224
V
LBI Input Hysteresis
VLBI_HYS
20
mV
Thermal Shutdown
(7)
TSD
150
°C
Thermal Shutdown Hysteresis
(7)
THYS
20
°C
(6) Typical numbers are at 25°C and represent the most likely norm.
(7) Specification is guaranteed by characterization and not 100% tested in production.
(8) Duty cycle affects current limit due to ramp generator.
LESHAN RADIO COMPANY, LTD.
Ver0.5
5/7


Html Pages

1  2  3  4  5  6  7 


Datasheet Download




Link URL




Privacy Policy
ALLDATASHEET.COM
Does ALLDATASHEET help your business so far?  [ DONATE ]  

About Alldatasheet   |   Advertisement   |   Datasheet Upload   |   Contact us   |   Privacy Policy   |   Alldatasheet API   |   Link Exchange   |   Manufacturer List
All Rights Reserved© Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn