RT8280 RICHTEK [Richtek Technology Corporation], RT8280 Datasheet - Page 4

• Manufacturer Part Number: RT8280
• Description: 3A, 24V, 3MHz Step-Down Converter
• Manufacturer: RICHTEK [Richtek Technology Corporation]

RT8280
Absolute Maximum Ratings
Recommended Operating Conditions
Electrical Characteristics
(V
Copyright
www.richtek.com
4
Feedback Reference Voltage
Upper Switch On Resistance
Lower Switch On Resistance
Upper Switch Leakage
Current Limit
Current Sense
Transconductance
Output Current to Comp Pin
Voltage
Error Amplifier
Transconductance
Oscillator Frequency
Short Circuit Frequency
Under Voltage Lockout
Threshold Rising
Under Voltage Lockout
Threshold Hysteresis
Maximum Duty Cycle
Minimum On Time
V
SW --------------------------------------------------------------------------------------------------------------- −0.3V to (V
BOOT ----------------------------------------------------------------------------------------------------------- (SW − 0.3V) to (SW + 6V)
Power Dissipation, P
SOP-8 (Exposed Pad) -------------------------------------------------------------------------------------- 1.333W
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 Input Voltage, V
Junction Temperature Range ------------------------------------------------------------------------------- −40°C to 125°C
Ambient Temperature Range ------------------------------------------------------------------------------- −40°C to 85°C
IN
All Other Pins ------------------------------------------------------------------------------------------------- −0.3V to 6V
Package Thermal Resistance (Note 2)
IN
= 12V, T
----------------------------------------------------------------------------------------------------------------
©
2012 Richtek Technology Corporation. All rights reserved.
Parameter
A
= 25°C, unless otherwise specified)
D
@ T
IN
JA
----------------------------------------------------------------------------------- 4.5V to 24V
JC
A
-------------------------------------------------------------------------------- 75°C/W
------------------------------------------------------------------------------- 15°C/W
= 25°C
V
R
R
I
I
g
g
f
V
ΔV
D
t
LEAK
LIM
SW
ON
Symbol
CS
EA
FB
UVLO
DS(ON)1
DS(ON)2
MAX
UVLO
(Note 1)
4.5V ≤ V
V
Duty = 90%,
V
ΔI
R
V
V
EN
BOOT
FB
FB
RT
C
= ±10μA
= 0.7V, R
= 0V, R
= 0V, V
= 24kΩ
− V
Test Conditions
IN
SW
≤ 24V
(Note 4)
RT
SW
RT
= 4.8V
= 24kΩ
= 0V
= 24kΩ
is a registered trademark of Richtek Technology Corporation.
0.784
Min
--
--
--
--
--
--
--
--
--
--
--
--
−
0.3V to 26V
DS8280-02 March 2012
0.11
Typ
920
230
430
0.8
3.8
2.2
4.2
10
65
70
0
5
0.816
Max
IN
10
--
--
--
--
--
--
--
--
--
--
--
+ 0.3V)
μA/V
MHz
Unit
kHz
A/V
mV
μA
ns
%
Ω
V
A
V
Ω