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RT9261 Datasheet(PDF) 7 Page - Richtek Technology Corporation

Part # RT9261
Description  VFM Step-Up DC/DC Converter
Download  12 Pages
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Manufacturer  RICHTEK [Richtek Technology Corporation]
Direct Link  http://www.richtek.com
Logo RICHTEK - Richtek Technology Corporation

RT9261 Datasheet(HTML) 7 Page - Richtek Technology Corporation

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RT9261/A
Preliminary
7
DS9261/A-12 March 2007
www.richtek.com
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
--
--
V
VOUT ≤ 3.5V
(1)
--
75
--
Efficiency
3.5V
< VOUT ≤ 5V (2)
--
85
--
%
VOUT ≤ 3.5V
(1)
--
15
18
Input Current 1
3.5V
< VOUT ≤ 5V (2)
To be measured at VIN at
no load
--
18
24
μA
VOUT ≤ 3.5V
(1)
--
5
8
Input Current 2
3.5V
< VOUT ≤ 5V (2)
To be measured at VOUT
in switch off condition
--
6
10
μA
VOUT ≤ 3.5V
(1)
60
--
--
LX Switching
Current
3.5V
< VOUT ≤ 5V (2)
ISWITCHING VLX = 0.4V
80
--
--
mA
LX Leakage Current
ILEAKAGE
VLX = 6V
--
--
0.5
μA
EN “H” Level
VIN = VOUT × 0.9
0.4
× V
OUT
--
--
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


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