RT8253A RICHTEK [Richtek Technology Corporation], RT8253A Datasheet - Page 4

• Manufacturer Part Number: RT8253A
• Description: 3A, 23V, 340kHz Synchronous Step-Down Converter
• Manufacturer: RICHTEK [Richtek Technology Corporation]

RT8253A
Absolute Maximum Ratings
Recommended Operating Conditions
Electrical Characteristics
(V
www.richtek.com
4
Shutdown Supply Current
Supply Current
Feedback Reference
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
V
SW ----------------------------------------------------------------------------------------------------------------- −0.3V to (V
BOOT ------------------------------------------------------------------------------------------------------------- (SW−0.3V) to (SW + 6V)
All Other Voltages ---------------------------------------------------------------------------------------------- −0.3V to 6V
BOOT − SW ----------------------------------------------------------------------------------------------------- −0.3V to 6V
Power Dissipation, P
SOP-8 (Exposed Pad) ---------------------------------------------------------------------------------------- 1.333W
Package Thermal Resistance (Note 2)
SOP-8 (Exposed Pad), θ
SOP-8 (Exposed 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
IN
= 12V, T
------------------------------------------------------------------------------------------------------------------ −0.3V to 25V
Parameter
A
= 25°C, unless otherwise specified)
IN
-------------------------------------------------------------------------------------------- 4.5V to 23V
D
@ T
JA
JC
----------------------------------------------------------------------------------- 75°C/W
A
---------------------------------------------------------------------------------- 15°C/W
= 25°C
V
g
R
R
g
f
f
D
t
OSC1
OSC2
ON
EA
CS
FB
DS(ON)1
DS(ON)2
MAX
Symbol
(Note 1)
Min. Duty Cycle,
V
V
V
4.5V ≤ V
ΔI
V
V
V
BOOT
EN
EN
EN
FB
FB
C
= ± 10μA
= 3 V, V
= 0V
= 0.7V
= 0V
= 0V, V
Test Conditions
− V
IN
SW
≤ 23V
SW
FB
(Note 4)
= 4.8V
= 0.9V
= 0V
0.788
Min
300
--
--
--
--
--
--
--
--
--
--
--
Typ
940
340
110
100
0.5
0.8
0.8
5.8
5.6
85
85
93
DS8253A-02 March 2011
0
0.812
Max
To be continued
380
1.2
10
--
--
--
--
--
--
--
--
3
IN
+ 0.3V)
Unit
μA/V
kHz
kHz
mΩ
mΩ
A/V
mA
ns
μA
μA
%
V
A