RT8258 RICHTEK [Richtek Technology Corporation], RT8258 Datasheet - Page 3

• Manufacturer Part Number: RT8258
• Description: 1.2A, 24V, 700kHz Step-Down Converter
• Manufacturer: RICHTEK [Richtek Technology Corporation]

Absolute Maximum Ratings
Recommended Operating Conditions
Electrical Characteristics
(V
DS8258-02 March 2011
Feedback Reference Voltage
Feedback Current
Switch On Resistance
Switch Leakage
Current Limit
Oscillator Frequency
Maximum Duty Cycle
Minimum On-Time
Under Voltage Lockout
Threshold Voltage
Under Voltage Lockout
Threshold Hysteresis
EN Input Voltage
EN Pull Up Current
Shutdown Current
Quiescent Current
Thermal Shutdown
Supply Voltage, V
PHASE Voltage ----------------------------------------------------------------------------------------------------- −0.3V to (V
BOOT Voltage ------------------------------------------------------------------------------------------------------- V
All Other Pins -------------------------------------------------------------------------------------------------------- 0.3V to 6V
Power Dissipation, P
T/SOT-23-6 ----------------------------------------------------------------------------------------------------------- 0.4W
Package Thermal Resistance (Note 2)
T/SOT-23-6, 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
Output Voltage, V
EN Voltage, V
Junction Temperature Range -------------------------------------------------------------------------------------
Ambient Temperature Range -------------------------------------------------------------------------------------
IN
= 12V, T
Parameter
A
= 25° C unless otherwise specified)
JA
EN
------------------------------------------------------------------------------------------------------ 250°C/W
----------------------------------------------------------------------------------------------------- 0V to 5.5V
OUT
IN
IN
Logic High
Logic Low
------------------------------------------------------------------------------------------------ 26V
------------------------------------------------------------------------------------------------ 4.5V to 24V
D
---------------------------------------------------------------------------------------------- 0.8V to 15V
@ T
A
= 25°C
V
I
R
I
f
t
I
I
T
Symbol
FB
LIM
SW
ON
SHDN
Q
SD
FB
DS(ON)
4.5V ≤ V
V
V
V
Rising
V
V
V
(Note 1)
FB
EN
BOOT
EN
EN
EN
= 0.8V
= 0V, V
= 0V
= 0V
= 2V, V
− V
IN
PHASE
Test Conditions
≤ 24V
PHASE
FB
= 1V (No Switching)
(Note 4)
= 4.8V
= 0V
0.784
Min
600
1.6
3.9
1.4
--
--
--
--
--
--
--
--
--
--
--
0.55
Typ
700
100
270
150
0.8
0.1
0.3
2.1
4.2
90
25
--
--
--
1
−
−
40°C to 125°C
40°C to 85°C
PHASE
RT8258
www.richtek.com
0.816
Max
800
0.3
4.5
0.4
10
--
--
--
--
--
--
--
--
--
1
+ 6V
IN
+ 0.3V)
Unit
kHz
mV
mA
μA
μA
μA
μA
°C
ns
%
V
Ω
A
V
V
3