RT8268 RICHTEK [Richtek Technology Corporation], RT8268 Datasheet - Page 4

• Manufacturer Part Number: RT8268
• Description: 2A, 24V, 400kHz Step-Down Converter
• Manufacturer: RICHTEK [Richtek Technology Corporation]

RT8268
Absolute Maximum Ratings
Recommended Operating Conditions
Electrical Characteristics
(V
www.richtek.com
4
Feedback Reference Voltage
High Side Switch-On Resistance
Low Side Switch-On Resistance
Switch Leakage
Current Limit
Current Sense Transconductance
Error Amplifier Tansconductance
Oscillator Frequency
Short Circuit Oscillation Frequency
Maximum Duty Cycle
Minimum On-Time
Under Voltage Lockout Threshold
Rising
Under Voltage Lockout Threshold
Hysteresis
Supply Voltage, V
Switching Voltage, SW ------------------------------------------------------------------------------------- −0.3V to (V
BOOT Voltage ------------------------------------------------------------------------------------------------ (V
All Other Voltage --------------------------------------------------------------------------------------------- −0.3V to 6V
Power Dissipation, P
SOP-8 ---------------------------------------------------------------------------------------------------------- 0.833W
MSOP-10 (Exposed Pad) ---------------------------------------------------------------------------------- 1.163W
Package Thermal Resistance (Note 2)
SOP-8, θ
MSOP-10 (Exposed Pad), θ
MSOP-10 (Exposed Pad), θ
Junction Temperature --------------------------------------------------------------------------------------- 150°C
Lead Temperature (Soldering, 10 sec.) ----------------------------------------------------------------- 260°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
Enable Voltage, V
Junction Temperature Range ------------------------------------------------------------------------------ −40°C to 125°C
Ambient Temperature Range ------------------------------------------------------------------------------ −40°C to 85°C
IN
= 12V, T
JA
A
Parameter
= 25°C unless otherwise specified)
---------------------------------------------------------------------------------------------------- 120°C/W
EN
IN
IN
----------------------------------------------------------------------------------------- −0.3V to 26V
----------------------------------------------------------------------------------------- 4.75V to 24V
----------------------------------------------------------------------------------------- 0V to 5.5V
D
@ T
A
JA
JC
= 25°C
---------------------------------------------------------------------------- 86°C/W
---------------------------------------------------------------------------- 30°C/W
V
R
R
I
G
G
f
D
t
LIM
SW
ON
FB
DS(ON)1
DS(ON)2
m
MAX
CS
Symbol
(Note 1)
4.75V ≤ V
V
Duty = 90%; V
Output Current to V
ΔI
V
V
EN
FB
FB
C
= ±10μA
= 0V
= 0.8V
= 0V, V
Test Conditions
(Note 4)
IN
SW
≤ 24V
BOOT−SW
= 0V
COMP
= 4.8V
0.902
Min
620
3.8
--
--
--
--
--
--
--
--
--
--
SW
DS8268-02 March 2011
0.92
0.18
Typ
920
400
120
250
2.5
4.2
10
90
90
− 0.3V) to (V
--
3
To be continued
0.938
IN
1220
Max
4.5
10
--
--
--
--
--
--
--
--
--
+ 0.3V)
SW
μA/V
Unit
kHz
kHz
A/V
mV
μA
ns
+ 6V)
%
Ω
Ω
V
A
V