rt9275 Richtek Technology Corporation, rt9275 Datasheet - Page 3

• Manufacturer Part Number: rt9275
• Description: Tiny Package, High Efficiency, Step-up Dc/dc Converter
• Manufacturer: Richtek Technology Corporation

Absolute Maximum Ratings
Electrical Characteristics
(V
DS9275-06 March 2007
Start-UP Voltage
Operating VDD Range
No Load Current I (V
Continuous Switching Current
Switch-off Current I (V
Shutdown Current I (V
Feedback Reference Voltage
Switching Frequency
Frequency Temperature Coefficient Δf
Maximum Duty
LX ON Resistance
Current Limit Setting (Note 5)
EXT ON Resistance to V
EXT ON Resistance to GND
Line Regulation (refer to V
Load Regulation (Note 6)
V
EN Pin Trip Level
Coefficient (refer to V
Output Voltage Temperature
Supply Voltage --------------------------------------------------------------------------------------------------------- 7V
LX Pin Switch Voltage ------------------------------------------------------------------------------------------------ −0.3V to 7V
Other I/O Pin Voltages ----------------------------------------------------------------------------------------------- −0.3V to 7V
LX Pin Switch Current ------------------------------------------------------------------------------------------------ 2.5A
EXT Pin Driver Current ------------------------------------------------------------------------------------------------ 200mA
Junction Temperature ------------------------------------------------------------------------------------------------- 150°C
Lead Temperature (Soldering, 10 sec.) --------------------------------------------------------------------------- 260°C
Storage Temperature Range ---------------------------------------------------------------------------------------- −65°C to +150°C
ESD Susceptibility (Note 2)
HBM (Human Body Mode) ------------------------------------------------------------------------------------------ 2kV
MM (Machine Mode) -------------------------------------------------------------------------------------------------- 200V
IN
Power Dissipation, P
SOT-23-6 ---------------------------------------------------------------------------------------------------------------
SOT-23-6, θ
Package Thermal Resistance (Note 3)
DD
= 1.5V, V
Over Voltage Protection
OUT
Parameter
JA
= V
---------------------------------------------------------------------------------------------------------- 250°C/W
DD
= 3.3V, T
IN
D
FB
DD
IN
) (Note 4)
@ T
)
)
)
DD
FB
A
= 25°C
A
)
= 25°C, unless otherwise specified)
V
V
I
I
I
I
V
T
F
D
I
ΔV
ΔV
NO LOAD
SWITCH
SWITCH OFF
OFF
LIM
s
S
Symbol
ST
DD
REF
MAX
LINE
LOAD
(Note 1)
Preliminary
I
V
V
V
V
EN = 0V, V
Close Loop, V
T
V
T
V
V
V
V
V
V
V
V
L
DD
IN
IN
IN
A
DD
A
DD
DD
DD
DD
DD
DD
DD
IN
= 1mA
= −40°C to 85°C
= −40°C to 85°C
= 1.5V, V
= EN = 3.3V, V
= 6V
= 2.5V, I
pin voltage
= 3.3V
= 3.3V
= 3.3V
= 3.3V
= 3.3V
= 3.3V
= 3.3V
= 3.5 ~ 6V, I
Test Conditions
IN
L
OUT
= 4.5V
= 1 ~ 100mA
DD
= 3.3V
L
= 3.3V
= 1mA
FB
= GND
1.225
Min
300
0.2
1.5
6.3
0.4
85
--
--
--
--
--
--
--
--
--
--
2
0.01
1.25
0.25
Typ
160
400
0.9
0.3
0.3
0.3
2.0
1.5
6.8
0.8
50
50
90
--
5
5
0.4W
RT9275
To be continued
www.richtek.com
1.275
Max
200
500
1.0
0.5
1.1
2.5
8.5
8.5
7.3
1.2
75
10
--
--
--
6
1
ppm/°C
mV/mA
Units
mV/V
%/°C
kHz
mA
μA
μA
μA
%
Ω
Ω
Ω
V
V
V
V
V
A
3