RT9261 Просмотр технического описания (PDF) - Richtek Technology
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RT9261 Datasheet PDF : 12 Pages
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Preliminary
RT9261/A
Electrical Characteristics (Refer to Figure 3)
Parameter
Symbol
Test Conditions
Min Typ Max
Output Voltage Accuracy
ΔVOUT
-2
-- +2 %
Input Voltage
VIN
--
--
7
V
Start-up Voltage
VST
IOUT = 1mA, VIN : 0 → 2V
--
0.85 1.0 V
Hold-on Voltage
VHO
IOUT = 1mA, VIN : 2 → 0V
0.7
Efficiency
VOUT ≤ 3.5V (1)
--
3.5V < VOUT ≤ 5V (2)
--
Input Current 1 VOUT ≤ 3.5V (1)
3.5V < VOUT ≤ 5V (2)
To be measured at VIN at
--
no load
--
Input Current 2 VOUT ≤ 3.5V (1)
3.5V < VOUT ≤ 5V (2)
To be measured at VOUT
--
in switch off condition
--
LX Switching VOUT ≤ 3.5V (1)
60
Current
3.5V < VOUT ≤ 5V (2) ISWITCHING VLX = 0.4V
80
--
--
V
75 --
%
85 --
15 18
μA
18 24
5
8
μA
6 10
--
--
mA
--
--
LX Leakage Current
ILEAKAGE VLX = 6V
--
-- 0.5 μA
EN “H” Level
VIN = VOUT × 0.9
0.4× VOUT --
--
V
EN “ L” Level
VIN = VOUT × 0.9
--
-- 0.2 V
EN “ H” Input Current
EN = VOUT
--
-- 0.5 μA
EN “ L“ Input Current
EN = 0V
-0.5
--
-- μA
Maximum Oscillator Frequency
FMAX
80
120 160 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)Unless otherwise provided, VIN = 1.8V, VSS = 0V, IOUT = 10mA, TOPT = 25°C, and use External Circuit of Typical
Application
(2)Unless otherwise provided, VIN = 3V, VSS= 0V, IOUT = 10mA, TOPT = 25°C, and External Circuit of Typical Application
DS9261/A-12 March 2007
www.richtek.com
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