RT8250 查看數據表（PDF） - Richtek Technology
零件编号
产品描述 (功能)
比赛名单
RT8250 Datasheet PDF : 12 Pages
| |||
RT8250
Electrical Characteristics
(VIN = 12V, TA = 25°C unless otherwise specified)
Parameter
Symbol
Shutdown Supply Current
Supply Current
Feedback Voltage
VFB
Error Amplifier Transconductance GEA
High-Side Switch On-Resistance RDS(ON)1
Low-Side Switch On-Resistance RDS(ON)2
High-Side Switch Leakage Current
Upper Switch Current Limit
Lower Switch Current Limit
COMP to Current Sense
Transconduc tance
Oscillation Frequency
Short Circuit Oscillation Frequency
Maximum Duty Cycle
Minimum On Time
EN Threshold
Voltage
Logic-High
Logic-Low
Input Under Voltage Lockout
Threshold
Input Under Voltage Lockout
Threshold Hysterisis
Soft-Start Current
Soft-Start Period
Thermal Shutdown
GCS
fOSC1
fOSC2
DMAX
tON
VI H
VI L
TSD
Test Conditions
VEN = 0V
VEN = 3 V, VFB = 1V
4.75V ≤ VIN ≤ 23V
ΔIC = ±10μA
VEN = 0V, VSW = 0V
Min. Duty Cycle
VBOOT – VSW = 4.8V
From Drain to Source
VFB = 0V
VFB = 0.8V
VIN Rising
VSS = 0V
CSS = 0.1μF
Min
--
--
0.911
--
--
--
--
Typ
0.3
0.7
0.925
1250
100
85
0
Max
3
1.2
0.939
--
--
--
10
Unit
μA
mA
V
μA/V
mΩ
mΩ
μA
--
5.5
--
A
--
1.4
--
A
--
5.2
-- A/V
300 340 380 kHz
--
110
-- kHz
--
90
--
%
--
200 --
ns
2.7
--
--
V
--
--
0.4
3.8 4.2 4.4
V
--
200
--
mV
--
7
--
μA
--
13
--
ms
--
150 --
°C
Note 1. Stresses listed as the above "Absolute Maximum Ratings" may cause permanent damage to the device. These are for
stress ratings. Functional operation of the device at these or any other conditions beyond those indicated in the
operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended
periods may remain possibility to affect device reliability.
Note 2. θJA is measured in the natural convection at TA = 25°C on a high effective thermal conductivity four-layer test board of
JEDEC 51-7 thermal measurement standard. The case position of θJC is on the exposed pad of the package.
Note 3. Devices are ESD sensitive. Handling precaution is recommended.
Note 4. The device is not guaranteed to function outside its operating conditions.
www.richtek.com
4
DS8250-05 March 2011
Share Link: 