rt9278 Richtek Technology Corporation, rt9278 Datasheet - Page 7

• Manufacturer Part Number: rt9278
• Description: High Efficiency Boost Converter High Power White Driver
• Manufacturer: Richtek Technology Corporation

Absolute Maximum Ratings
l
l
l
l
l
l
l
l
l
Recommended Operating Conditions
l
l
Electrical Characteristics
(V
DS9278-04 August 2007
Error Amplifier
Start-Up Voltage
Operating Voltage Range, After start-up V
VOUT Output Voltage Range
VOUT Over Voltage Protection
Switch-off Current I (V
Shutdown Current
Feedback Reference Voltage
Switching Frequency
Maximum Duty
SWN Switch ON Resistance
SWP Switch ON Resistance
Current Limit Setting
GM
Compensation Source Current
Compensation Sink Current
Supply Voltage, V
LX Pin Voltage -------------------------------------------------------------------------------------------------------- 0.3V to 7V
The Other pins -------------------------------------------------------------------------------------------------------- 0.3V to 7V
Power Dissipation, P
VDFN-10L 3x3 -------------------------------------------------------------------------------------------------------- 1.43W
Package Thermal Resistance (Note 4)
VDFN-10L 3x3,
Lead Temperature (Soldering, 10 sec.)-------------------------------------------------------------------------- 260 C
Operation Temperature Range ------------------------------------------------------------------------------------ 40 C to 85 C
Storage Temperature Range --------------------------------------------------------------------------------------- 65 C to 150 C
ESD Susceptibility (Note 2)
HBM (Human Body Mode) ----------------------------------------------------------------------------------------- 2kV
Ambient Temperature Range -------------------------------------------------------------------------------------- 0 C to 70 C
Junction Temperature Range -------------------------------------------------------------------------------------- 0 C to 125 C
BAT
= 1.8V, V
OUT
Parameter
= 3.3V, T
JA
DD
--------------------------------------------------------------------------------------------------- 70 C/W
------------------------------------------------------------------------------------------------- 7V
D
BAT
@ T
A
)
= 25 C, unless otherwise specified)
A
= 25 C
V
V
I
I
V
F
D
I
Symbol
SW OFF
OFF
SW
S
(Note 1)
ST
BAT
OUT_ADJ
FB
(MAX)
Preliminary
I
V
EN Pin = 0V, Open Loop
Close Loop, V
V
V
V
L
OUT
OUT
OUT
OUT
= 1mA
Test Conditions
(Note 3)
= 3.3V, V
= 3.3V
= 3.3V
= 3.3V
OUT
FB
= 0.9V
= 3.3V
0.784
Min
1.1
2.4
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0.01
Typ
200
650
210
240
1.5
6.5
0.8
0.2
22
22
85
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2
RT9278
0.816
To be continued
www.richtek.com
Max
350
5.5
5.5
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1
Units
kHz
m
m
ms
uA
uA
%
V
V
V
V
V
A
A
A
7