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參數(shù)資料
| 型號(hào)： | RT9267 |
| 英文描述： | Step-up DC/DC Converter |
| 中文描述： | 升壓型DC / DC轉(zhuǎn)換器 |
| 文件頁(yè)數(shù)： | 2/14頁(yè) |
| 文件大小： | 223K |
| 代理商： | RT9267 |
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RT9261/A
Preliminary
www.richtek.com
2
DS9261/A-03 January 2002
Absolute Maximum Ratings
z
Output Voltage
z
LX Pin Voltage
(1)
z
EXT Pin Voltage
(2)
z
CE Pin Voltage
(3)
z
LX Pin Output Current
(1)
z
EXT Pin Current
(2)
z
Power Dissipation, P
D
@ T
A
= 25
°
C
z
SOT-89
SOT-25
z
Package Thermal Resistance
SOT-89,
θ
JC
SOT-89,
θ
JA
SOT-25,
θ
JA
z
Operating Temperature Range
z
Storage Temperature Range
z
Lead Temperature (Soldering, 10 sec.)
Notes:
(1) Applicable to RT9261-
CX and RT9261-
CB
(2) Applicable to RT9261A-
CX and RT9261A-
CB
(3) Applicable to RT9261-
CB and RT9261A-
CB
8V
8V
-0.3 to V
OUT
+0.3V
-0.3 to V
OUT
+0.3V
250mA
±50mA
0.5W
0.25W
100
°
C/W
300
°
C/W
250
°
C/W
-20 to +85
°
C
165
°
C
260
°
C
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
--
0.85
1.0
V
Hold-on Voltage
V
HO
0.7
--
--
V
V
OUT
≤
3.5V
(1)
3.5V
<
V
OUT
≤
5V
(2)
--
15
18
Input Current 1
To be measured at V
IN
at
no load
--
18
24
μ
A
Input Current 2
To be measured at V
OUT
in switch off condition
--
5
8
μ
A
V
OUT
≤
3.5V
(1)
3.5V
<
V
OUT
≤
5V
(2)
60
--
--
LX Switching Current
I
SWITCHING
V
LX
= 0.4V
80
--
--
mA
LX Leakage Current
I
LEAKAGE
V
LX
= 6V
--
--
0.5
μ
A
Maximum Oscillator
F
MAX
80
120
160
KHz
Oscillator Duty Cycle
D
OSC
On ( V
LX
” L ” ) side
65
75
85
%
Efficiency
--
75
--
%
V
LX
Voltage Limit
Notes:
(1) V
IN
= 1.8V, VSS = 0V, I
OUT
= 10mA, T
OPT
= 25
°
C, and External Circuit of Typical Application
(2) V
IN
= 3V, VSS = 0V, I
OUT
= 10mA, T
OPT
= 25
°
C, and External Circuit of Typical Application
L
X
switch on
0.65
0.8
1.0
V
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