RT9261B-12CX Ver la hoja de datos (PDF) - Richtek Technology
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RT9261B-12CX Datasheet PDF : 10 Pages
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RT9261B
Preliminary
Electrical Characteristics (Refer to Fig. 2)
Parameter
Symbol
Test Conditions
Min
Output Voltage Accuracy
∆VOUT
Input Voltage
VIN
Start-up Voltage
VST
Hold-on Voltage
VHO
Efficiency
Input Current 1
VOUT ≤ 3.5V (1)
3.5V < VOUT ≤ 5V (2)
-2
--
IOUT = 1mA, VIN: 0 → 2V
--
IOUT = 1mA, VIN: 2 → 0V 0.7
--
To be measured at VIN in
--
continuous switching
--
Typ Max Units
-- +2 %
--
7
V
0.8 1
V
-- -- V
80 -- %
24 36
36 45 µA
Input Current 2 (1) (2)
To be measured at VOUT
in switch off condition
--
6.5 10 µA
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
18 36
µA
20 45
-- --
mA
-- --
LX Leakage Current
ILEAKAGE VLX = 6V
--
-- 0.5 µA
CE “H” Level
VIN = VOUT * 0.9
0.4×VOUT --
--
V
CE “L” Level
VIN = VOUT * 0.9
--
-- 0.2 V
CE “H” Input Current
CE = VOUT
--
-- 0.5 µA
CE “ L” Input Current
CE = 0V
-0.5
-- -- µA
Maximum Oscillator Frequency
FMAX
140 190 240 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 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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4
DS9261B-03 September 2001
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