RT7277
Absolute Maximum Ratings (Note 1)
z Supply Voltage, VIN ----------------------------------------------------------------------------------------------- −0.3V to 21V
z Switch Voltage, SW ----------------------------------------------------------------------------------------------- −0.8V to (VIN + 0.3V)
<10ns ----------------------------------------------------------------------------------------------------------------- −5V to 25V
z BOOT to SW, PVCC ---------------------------------------------------------------------------------------------- −0.3V to 6V
z Other Pins Voltage ------------------------------------------------------------------------------------------------- −0.3V to 21V
z Power Dissipation, PD @ TA = 25°C
SOP-8 (Exposed Pad) -------------------------------------------------------------------------------------------- 2.041W
z Package Thermal Resistance (Note 2)
SOP-8 (Exposed Pad), θJA --------------------------------------------------------------------------------------- 49°C/W
SOP-8 (Exposed Pad), θJC -------------------------------------------------------------------------------------- 15°C/W
z Junction Temperature Range------------------------------------------------------------------------------------- 150°C
z Lead Temperature (Soldering, 10 sec.)------------------------------------------------------------------------ 260°C
z Storage Temperature Range ------------------------------------------------------------------------------------- −65°C to 150°C
z ESD Susceptibility (Note 3)
HBM (Human Body Model)--------------------------------------------------------------------------------------- 2kV
Recommended Operating Conditions (Note 4)
z Supply Voltage, VIN ----------------------------------------------------------------------------------------------- 4.5V to 18V
z Junction Temperature Range------------------------------------------------------------------------------------- −40°C to 125°C
z Ambient Temperature Range------------------------------------------------------------------------------------- −40°C to 85°C
Electrical Characteristics
(VIN = 12V, TA = 25°C, unless otherwise specified)
Parameter
Supply Current
Symbol
Test Conditions
Min
Typ
Max
Unit
Shutdown Current
Quiescent Current
Logic Threshold
I
I
V
V
= 0V
--
--
1.5
0.7
10
--
μA
SHDN
EN
EN
= 3V, V = 1V
mA
Q
FB
Logic-High
Logic-Low
2
--
--
18
EN Voltage
V
--
0.4
V
FB
Voltage and Discharge Resistance
Feedback Threshold Voltage
Feedback Input Current
V
I
4.5V ≤ V ≤ 18V
0.757 0.765 0.773
V
FB
IN
V
= 0.8V
FB
−0.1
0
0.1
μA
FB
V
PVCC
Output
V
Output Voltage
V
6V ≤ V ≤ 18V, 0 < I
< 5mA
4.7
--
5.1
--
5.5
20
V
PVCC
PVCC
PVCC
IN
PVCC
Line Regulation
Load Regulation
Output Current
6V ≤ V ≤ 18V, I
= 5mA
mV
mV
mA
IN
PVCC
0 < I
< 5mA
--
--
100
--
PVCC
I
V
= 6V, V
= 4V
--
110
IN
PVCC
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is a registered trademark of Richtek Technology Corporation.
www.richtek.com
4
DS7277-00 October 2012
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
