RT9261/A
Preliminary
Electrical Characteristics (Refer to Fig. 3)
Parameter
Output Voltage Accuracy
Input Voltage
Symbol
∆V
Test Conditions
Min
-2
--
Typ Max Units
--
--
+2
7
%
V
V
V
OUT
V
V
V
IN
Start-up Voltage
--
0.85
--
1.0
--
I
I
= 1mA, V : 0 → 2V
IN
ST
OUT
Hold-on Voltage
0.7
--
= 1mA, V : 2 → 0V
HO
OUT
IN
(1)
75
85
15
18
5
--
V
≤ 3.5V
OUT
Efficiency
%
µA
µA
mA
(2)
(2)
(2)
(2)
--
--
3.5V < V
≤ 5V
OUT
(1)
--
18
24
8
V
≤ 3.5V
OUT
To be measured at V at
no load
IN
Input Current 1
Input Current 2
--
3.5V < V
≤ 5V
OUT
(1)
--
V
OUT
≤ 3.5V
To be measured at V
in switch off condition
OUT
--
6
10
--
3.5V < V
≤ 5V
OUT
(1)
60
80
--
--
V
≤ 3.5V
OUT
LX Switching
Current
I
I
V
= 0.4V
= 6V
SWITCHING
LX
--
--
3.5V < V
≤ 5V
OUT
LX Leakage Current
CE “H” Level
--
0.5
--
µA
V
V
V
V
LEAKAGE
LX
IN
IN
--
= V
= V
× 0.9
× 0.9
0.4× V
OUT
OUT
OUT
OUT
CE “ L” Level
--
--
--
0.2
0.5
--
V
CE “ H” Input Current
CE “ L“ Input Current
--
µA
µA
KHz
%
CE = V
CE = 0V
-0.5
80
--
Maximum Oscillator Frequency
Oscillator Duty Cycle
120
75
0.8
160
85
1.0
F
MAX
65
D
On (V ” L” ) side
OSC
LX
LX switch on
0.65
V
V
LX
Voltage Limit
Notes:
(1) Unless otherwise provided, V = 1.8V, VSS = 0V, I
= 10mA, T
= 25°C, and use External Circuit of
OPT
IN
OUT
Typical Application
(2) Unless otherwise provided, V = 3V, VSS = 0V, I
= 10mA, T = 25°C, and External Circuit of Typical
OPT
IN
OUT
Application
www.richtek-ic.com.tw
DS9261/A-03 January 2002
4
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
