RT8253B RICHTEK [Richtek Technology Corporation], RT8253B Datasheet - Page 4

• Manufacturer Part Number: RT8253B
• Description: 3A, 23V, 1.2MHz Synchronous Step-Down Converter
• Manufacturer: RICHTEK [Richtek Technology Corporation]

RT8253B
Absolute Maximum Ratings
Recommended Operating Conditions
Electrical Characteristics
(V
www.richtek.com
4
Shutdown Supply Current
Supply Current
Feedback Voltage
Error Amplifier
Transconductance
High Side Switch
On-Resistance
Low Side Switch
On-Resistance
High Side Switch Leakage
Current
Upper Switch Current Limit
COMP to Current Sense
Transconductance
Oscillation Frequency
Short Circuit Oscillation
Frequency
Maximum Duty Cycle
Minimum On-Time
Supply Voltage, V
Input Voltage, SW --------------------------------------------------------------------------------------------------- −0.3V to (V
V
Power Dissipation, P
SOP-8 (Exposed Pad) --------------------------------------------------------------------------------------------- 1.333W
SOP-8 (Exposed Pad), θ
SOP-8 (Εxposed Pad), θ
Lead Temperature (Soldering, 10 sec.) ------------------------------------------------------------------------- 260°C
Junction Temperature ----------------------------------------------------------------------------------------------- 150°C
Storage Temperature Range -------------------------------------------------------------------------------------- −65°C to 150°C
ESD Susceptibility (Note 3)
HBM (Human Body Mode) ---------------------------------------------------------------------------------------- 2kV
MM (Machine Mode) ------------------------------------------------------------------------------------------------ 200V
Supply Voltage, V
Junction Temperature Range -------------------------------------------------------------------------------------- −40°C to 125°C
Ambient Temperature Range -------------------------------------------------------------------------------------- −40°C to 85°C
IN
Package Thermal Resistance (Note 2)
Other Pin Voltages ------------------------------------------------------------------------------------------------- −0.3V to 6V
BOOT
= 12V, T
- V
Parameter
SW
A
= 25°C, unless otherwise specified)
----------------------------------------------------------------------------------------------------------- −0.3V to 6V
IN
IN
-------------------------------------------------------------------------------------------------
------------------------------------------------------------------------------------------------- 4.5V to 23V
D
@ T
JA
JC
---------------------------------------------------------------------------------------- 75°C/W
A
--------------------------------------------------------------------------------------- 15°C/W
= 25°C
V
GEA
R
R
G
F
F
D
t
ON
Symbol
OSC1
OSC2
FB
DS(ON)1
DS(ON)2
MAX
CS
V
V
4.5V ≤ V
ΔIC = ±10μA
V
Min. Duty Cycle, V
V
V
(Note 1)
EN
EN
EN
FB
FB
= 3 V, V
= 0V
= 0.7V
= 0V
= 0V, V
IN
Test Conditions
≤ 23V
SW
FB
= 0.9V
= 0V
(Note 4)
BOOT
− V
SW
= 4.8V
0.788
Min
4.5
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1
DS8253B-02 March 2011
Typ
940
300
100
0.5
0.8
0.8
5.8
5.6
1.2
85
85
75
0
−
0.3V to 25V
To be continued
0.812
Max
1.2
1.4
10
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3
IN
+ 0.3V)
Unit
μA/V
MHz
kHz
mΩ
mΩ
A/V
mA
μA
ns
μA
%
V
A