RT8453BGSP Richtek USA Inc, RT8453BGSP Datasheet - Page 5

• Manufacturer Part Number: RT8453BGSP
• Description: IC LED DVR BUCK 40V 1.5A 8SOP
• Manufacturer: Richtek USA Inc

Specifications of RT8453BGSP

• Constant Current: Yes
• Internal Driver: Yes
• Type - Primary: Backlight, General Purpose
• Mounting Type: Surface Mount
• Topology: PWM, Step-Down (Buck)
• Number Of Outputs: 1
• Frequency: 400kHz ~ 600kHz
• Voltage - Supply: 4.5 V ~ 40 V
• Package / Case: 8-SOIC (0.154", 3.90mm Width) Exposed Pad
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Output: -
• Operating Temperature: -
• Other names: 1028-1004-2

Note 1. Stresses listed as the above "Absolute Maximum Ratings" may cause permanent damage to the device. These are
Note 2. θ
Note 3. Devices are ESD sensitive. Handling precaution is recommended.
Note 4. The device is not guaranteed to function outside its operating conditions.
Note 5. When the natural maximum duty cycle of 500kHz switching frequency is reached, the switching cycle will be skipped
Note 6. If connected with a 20kΩ series resistor, this pin can go up to 40V.
DS8453B-00 August 2010
Maximum Duty Cycle
SW On-Voltage
SW Current Limit
Soft-Start
Soft-Start Current
Over Temperature Protection
Thermal Shutdown Temperature T
Thermal Shutdown Hysteresis
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.
JEDEC 51-7 thermal measurement standard. The measurement case position of θ
package.
(not reset) as the operating condition requires to effectively stretch and achieve higher on cycle.
JA
is measured in natural convection at T
Parameter
(Note 5)
V
I
I
ΔT
LIM_SW
SS
Symbol
SD
SW
SD
I
V
SW
A
SS
= 25°C on a high effective thermal conductivity four-layer test board of
= 0.5A
≤ 2V
Test Conditions
1.25
Min
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JC
is on the exposed pad of the
Typ
150
0.4
1.5
88
10
6
RT8453B
Max
www.richtek.com
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Unit
μA
°C
°C
%
V
A