rt8288a Richtek Technology Corporation, rt8288a Datasheet - Page 4

• Manufacturer Part Number: rt8288a
• Description: 4a, 21v 500khz Synchronous Step-down Converter
• Manufacturer: Richtek Technology Corporation

RT8288A
Absolute Maximum Ratings
Recommended Operating Conditions
Electrical Characteristics
(V
www.richtek.com
4
Shutdown Current
Quiescent Current
Upper Switch On Resistance
Lower Switch On Resistance
Switch Leakage
Current Limit
Oscillator Frequency
Short Circuit Frequency
Maximum Duty Cycle
Minimum On Time
Feedback Voltage
Feedback Current
EN Input Threshold
Voltage
Enable Current
Supply Input Voltage, V
Switch Voltage, SW ----------------------------------------------------------------------------------------- −0.3V to (V
Boot Voltage, BOOT ---------------------------------------------------------------------------------------- (SW − 0.3V) to (SW + 6V)
All 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 ------------------------------------------------------------------------------------------------------------ 2kV
MM -------------------------------------------------------------------------------------------------------------- 200V
Supply Input 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)
D
Logic-High V
Logic-Low V
@ T
IN
IN
JA
JC
---------------------------------------------------------------------------------- −0.3V to 26V
---------------------------------------------------------------------------------- 4.5V to 21V
A
-------------------------------------------------------------------------------- 75°C/W
-------------------------------------------------------------------------------- 15°C/W
= 25°C
I
I
I
I
f
D
t
V
I
R
R
SHDN
Q
LEAK
LIMIT
ON
FB
SW
FB
IH
IL
DS(ON)1
DS(ON)2
MAX
Symbol
(Note 1)
V
V
V
V
V
V
V
4.5V ≤ V
V
V
EN
EN
EN
BOOT
FB
FB
FB
EN
EN
= 0.75V
= 0V
= 0.8V
= 0
= 2V, V
= 0V, V
= 2V
= 0V
− V
IN
Test Conditions
SW
≤ 21V
(Note 4)
FB
SW
= 4.8V
= 1V
= 0V or 12V
0.796 0.808
Min
425
5.9
--
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--
--
--
--
--
--
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2
DS8288A-01 August 2011
Typ
120
500
150
100
0.7
40
90
10
--
--
0
0
7
1
0
To be continued
IN
Max
0.82
575
5.5
0.4
10
50
--
--
--
--
--
--
--
--
--
1
+ 0.3V)
Unit
kHz
kHz
mA
mΩ
mΩ
μA
μA
nA
μA
ns
%
A
V
V