RT8279 RICHTEK [Richtek Technology Corporation], RT8279 Datasheet - Page 4

• Manufacturer Part Number: RT8279
• Description: 5A, 36V, 500kHz Step-Down Converter
• Manufacturer: RICHTEK [Richtek Technology Corporation]

RT8279
Absolute Maximum Ratings
Recommended Operating Conditions
www.richtek.com
4
Electrical Characteristics
(V
Reference Voltage
High Side Switch-On Resistance
Low Side Switch-On Resistance
High Side Switch Leakage
Current Limit
Oscillator Frequency
Short Circuit Frequency
Maximum Duty Cycle
Minimum On-Time
Under Voltage Lockout Threshold
Rising
Under Voltage Lockout Threshold
Hysteresis
EN Threshold
Voltage
Enable Pull Up Current
Shutdown Current
Quiescent Current
Soft-Start Period
Thermal Shutdown
Supply Voltage, V
Switching Voltage, SW ------------------------------------------------------------------------------------- −0.3V to V
BOOT Voltage ------------------------------------------------------------------------------------------------- (V
The Other Pins ------------------------------------------------------------------------------------------------ −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
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
Junction Temperature Range -------------------------------------------------------------------------------
Ambient Temperature Range -------------------------------------------------------------------------------
IN
= 12V, T
A
Parameter
= 25°C unless otherwise specified)
IN
IN
Logic-High
Logic-Low
------------------------------------------------------------------------------------------ −0.3V to 40V
------------------------------------------------------------------------------------------ 5.5V to 36V
D
@ T
JA
JC
A
--------------------------------------------------------------------------------- 75°C/W
-------------------------------------------------------------------------------- 15°C/W
= 25°C
V
R
R
I
f
D
t
V
V
I
I
T
LIM
OSC
ON
SHDN
Q
Symbol
REF
IH
IL
SD
DS(ON)1
DS(ON)2
MAX
(Note 1)
5.5V ≤ V
V
Duty = 90%, V
V
V
EN_hys = 350mV
V
V
C
EN
FB
FB
EN
EN
SS
= 0V
= 0.8V
= 0V, V
= 0.1μF
= 0V
= 2V, V
IN
Test Conditions
(Note 4)
≤ 36V
SW
FB
BOOT−SW
= 1.5V
= 0V
= 4.8V
1.202 1.222 1.239
Min
425
3.8
1.4
85
DS8279-01
--
--
--
--
--
--
--
--
--
--
--
6
3
−
−
40°C to 125°C
40°C to 85°C
SW
Typ
500
150
100
315
150
110
− 0.3V) to (V
7.5
4.2
0.6
10
90
25
--
--
--
1
5
IN
December 2011
Max
160
575
150
+ 0.3V
4.5
0.4
8.2
15
10
95
45
--
--
--
--
--
9
1
SW
Unit
mΩ
kHz
kHz
mV
mA
ms
+ 6V)
μA
μA
μA
°C
ns
%
Ω
V
A
V
V