RT9261B 데이터 시트보기 (PDF) - Richtek Technology
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RT9261B Datasheet PDF : 8 Pages
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RT9261B
Preliminary
Electrical Characteristics (Refer to Figure 2)
Parameter
Symbol
Test Conditions
Min Typ Max Units
Output Voltage Accuracy
ΔVOUT
-2
Input Voltage
VIN
--
Start-up Voltage
VST
IOUT = 1mA, VIN: 0 → 2V
--
Hold-on Voltage
VHO
IOUT = 1mA, VIN: 2 → 0V 0.7
Efficiency
--
Input Current 1
VOUT ≤ 3.5V (1)
3.5V < VOUT ≤ 5V (2)
To be measured at VIN in
--
continuous switching
--
Input Current 2 (1) (2)
To be measured at VOUT
--
in switch off condition
Input Current 3
VOUT ≤ 3.5V (1)
3.5V < VOUT ≤ 5V (2)
To be measured at VIN in
--
no load (guaranteed by I1
and I2)
--
LX Switching Current
VOUT ≤ 3.5V (1)
3.5V < VOUT ≤ 5V (2)
ISWITCHING VLX = 0.4V
120
160
LX Leakage Current
ILEAKAGE VLX = 6V
--
-- +2 %
-- 7 V
0.8 1 V
-- -- V
80 -- %
24 36
μA
36 45
6.5 10 μA
18 36
μA
20 45
-- --
mA
-- --
-- 0.5 μA
EN “H” Level
VIN = VOUT * 0.9
0.4×VOUT --
--
V
EN “L” Level
EN “H” Input Current
VIN = VOUT * 0.9
EN = VOUT
--
-- 0.2 V
--
-- 0.5 μA
EN “ L” Input Current
EN = 0V
-0.5
-- -- μA
Maximum Oscillator Frequency
FMAX
VOUT = 2.5V to 5V
VOUT = 1.5V to 2.4V
140 190 240 kHz
140 190 320 kHz
Oscillator Duty Cycle
DOSC
On (VLX “L”) side
65
75 85 %
VLX Voltage Limit
LX switch on
0.65 0.8 1.0 V
Notes:
(1) VIN = 1.8V, VSS = 0V, IOUT = 1mA, Topt = 25°C, and use External Circuit of Typical Application
(2) VIN = 3V, VSS = 0V, IOUT = 1mA, Topt= 25°C, and External Circuit of Typical Application
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DS9261B-12 March 2007
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