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參數(shù)資料
| 型號(hào)： | RT9261B-22CX |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | VFM STEP UP DC/DC CONVERTER |
| 中文描述： | 衡工量值式升壓型DC / DC變換器 |
| 文件頁(yè)數(shù)： | 3/10頁(yè) |
| 文件大?。?/td> | 192K |
| 代理商： | RT9261B-22CX |
Preliminary
RT9261B
DS9261B-03 September 2001
www.richtek-ic.com.tw
3
Absolute Maximum Ratings
z
Output Voltage
8V
8V
-0.3 to V
OUT
+0.3V
400mA
z
LX Pin Voltage
z
CE Pin Voltage
(1)
z
LX Pin Output Current
z
Power Dissipation, P
D
@ T
A
= 25
°
C
SOT-89
SOT-25
0.5W
0.25W
z
Package Thermal Resistance
SOT-89,
θ
JC
SOT-89,
θ
JA
SOT-25,
θ
JA
z
Operating Temperature Range
100
°
C/W
300
°
C/W
250
°
C/W
-20 to +85
°
C
-65
°
C to 150
°
C
260
°
C
z
Storage Temperature Range
z
Lead Temperature (Soldering, 10 sec.)
Notes: (1) Applicable to RT9261B-xxCB
Electrical Characteristics
(Refer to Fig. 1)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Units
Output Voltage Accuracy
V
OUT
-2
--
+2
%
Input Voltage
V
IN
--
--
7
V
Start-up Voltage
V
ST
I
OUT
= 1mA, V
IN
: 0
→
2V
I
OUT
= 1mA, V
IN
: 2
→
0V
--
0.8
1
V
Hold-on Voltage
V
HO
0.7
--
--
V
V
OUT
≤
3.5V
(1)
3.5V
<
V
OUT
≤
5V
(2)
--
24
36
Input Current 1
To be measured at V
IN
in
continuous switching
--
36
45
μ
A
Input Current 2
(1) (2)
To be measured at V
OUT
in
switch off condition
--
6.5
10
μ
A
V
OUT
≤
3.5V
(1)
--
18
36
Input Current 3
3.5V
<
V
OUT
≤
5V
(2)
V
OUT
≤
3.5V
(1)
3.5V
<
V
OUT
≤
5V
(2)
I
SWITCHING
V
LX
= 0.4V
To be measured at V
IN
in
no load (guaranteed by I
1
and I
2
)
--
20
45
μ
A
120
--
--
LX Switching Current
160
--
--
mA
LX Leakage Current
I
LEAKAGE
V
LX
= 6V
--
--
0.5
μ
A
Maximum Oscillator Frequency
F
MAX
140
190
240
KHz
Oscillator Duty Cycle
D
OSC
On (V
LX
“L”) side
65
75
85
%
Efficiency
--
80
--
%
V
LX
Voltage Limit
LX switch on
0.65
0.8
1.0
V
Notes:
(1) V
IN
= 1.8V, V
SS
= 0V, I
OUT
= 1mA, Topt = 25
°
C, and External Circuit of Typical Application
(2) V
IN
= 3V, V
SS
= 0V, I
OUT
= 1mA, Topt = 25
°
C, and External Circuit of Typical Application
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