RT8259 RICHTEK [Richtek Technology Corporation], RT8259 Datasheet - Page 3

• Manufacturer Part Number: RT8259
• Description: 1.2A, 24V, 1.4MHz Step-Down Converter
• Manufacturer: RICHTEK [Richtek Technology Corporation]

Absolute Maximum Ratings
Recommended Operating Conditions
Electrical Characteristics
(V
DS8259-03 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
Under Voltage Lockout
Threshold Hysteresis
EN Input Voltage
EN Pull Up Current
Supply Voltage, V
PHASE Voltage ----------------------------------------------------------------------------------------------------- −0.3V to (V
BOOT Voltage ------------------------------------------------------------------------------------------------------- V
All Other Pins -------------------------------------------------------------------------------------------------------- 0.3V to 6V
Output Voltage ------------------------------------------------------------------------------------------------------ −0.3V to 15V
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 ------------------------------------------------------------------------------------- −40°C to 125°C
Ambient Temperature Range ------------------------------------------------------------------------------------- −40°C to 85°C
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
V
V
Symbol
FB
LIM
SW
ON
FB
DS(ON)
IH
IL
4.5V ≤ V
V
V
V
Rising
V
(Note 1)
FB
EN
BOOT
EN
= 0.8V
= 0V, V
= 0V
− V
IN
PHASE
Test Conditions
≤ 24V
PHASE
(Note 4)
= 4.8V
= 0V
0.784
Min
1.6
1.2
3.9
1.4
--
--
--
--
--
--
--
--
Typ
100
200
0.8
0.1
0.3
2.1
1.4
4.2
80
--
--
--
1
PHASE
RT8259
To be continued
www.richtek.com
0.816
Max
0.3
1.6
4.5
0.4
10
--
--
--
--
--
--
--
+ 6V
IN
+ 0.3V)
Unit
MHz
mV
μA
μA
μA
ns
%
Ω
V
A
V
V
3