RT9261-12CX Просмотр технического описания (PDF) - Richtek Technology
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RT9261-12CX Datasheet PDF : 14 Pages
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RT9261/A
Preliminary
Absolute Maximum Ratings
z Output Voltage
z LX Pin Voltage (1)
z EXT Pin Voltage (2)
z CE Pin Voltage (3)
z LX Pin Output Current (1)
z EXT Pin Current(2)
z Power Dissipation, PD @ TA = 25°C
z SOT-89
SOT-25
z Package Thermal Resistance
SOT-89, θJC
SOT-89, θJA
SOT-25, θJA
z Operating Temperature Range
z Storage Temperature Range
z Lead Temperature (Soldering, 10 sec.)
Notes:
(1) Applicable to RT9261-
CX and RT9261-
CB
(2) Applicable to RT9261A-
CX and RT9261A-
CB
(3) Applicable to RT9261-
CB and RT9261A-
CB
8V
8V
-0.3 to VOUT +0.3V
-0.3 to VOUT +0.3V
250mA
±50mA
0.5W
0.25W
100°C/W
300°C/W
250°C/W
-20 to +85°C
165°C
260°C
Electrical Characteristics (Refer to Fig. 1)
Parameter
Symbol
Test Conditions
Min Typ Max Units
Output Voltage Accuracy
Input Voltage
Start-up Voltage
Hold-on Voltage
Input Current 1
VOUT ≤ 3.5V (1)
3.5V < VOUT ≤ 5V (2)
Input Current 2
LX Switching Current
LX Leakage Current
VOUT ≤ 3.5V (1)
3.5V < VOUT ≤ 5V (2)
Maximum Oscillator
Oscillator Duty Cycle
Efficiency
∆VOUT
VIN
VST
VHO
IOUT = 1mA, VIN: 0 → 2V
IOUT = 1mA, VIN: 2 → 0V
To be measured at VIN at
no load
To be measured at VOUT
in switch off condition
ISWITCHING VLX = 0.4V
ILEAKAGE
FMAX
DOSC
VLX = 6V
On ( VLX ” L ” ) side
-2 -- +2 %
--
--
7
V
-- 0.85 1.0 V
0.7 -- -- V
-- 15 18
--
18 24 µA
--
5
8 µA
60 -- --
mA
80 -- --
--
-- 0.5 µA
80 120 160 KHz
65 75 85 %
-- 75 -- %
VLX Voltage Limit
LX switch on
0.65 0.8 1.0 V
Notes:
(1) VIN = 1.8V, VSS = 0V, IOUT = 10mA, TOPT = 25°C, and External Circuit of Typical Application
(2) VIN = 3V, VSS = 0V, IOUT = 10mA, TOPT = 25°C, and External Circuit of Typical Application
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2
DS9261/A-03 January 2002
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