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參數(shù)資料
| 型號： | UC3550-50-AF5-R |
| 廠商： | 友順科技股份有限公司 |
| 英文描述： | PWM CONTROLLED，PWM/PFM SWITCHABLE STEP-UP DC-DC CONTROLLER |
| 中文描述： | PWM控制，PWM / PFM切換升壓型DC - DC控制器 |
| 文件頁數(shù)： | 5/10頁 |
| 文件大小： | 203K |
| 代理商： | UC3550-50-AF5-R |
UC3550
CMOS
IC
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
QW-R502-082,A
5 of 10
ELECT RICAL CHARACT ERIS T ICS (Cont.)
UC3550-5.0V
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNIT
OSCILLATOR
Frequency
Frequency Temperature Coefficient
Maximum PWM Duty Cycle
Minimum Start-up Voltage
Minimum Start-up Voltage
Minimum Start-up Voltage
Temperature Coefficient
Minimum Operation Hold Voltage
Soft-Start Time
CE (PIN 1)
CE Input Voltage
High State, Device Enabled
Low State, Device Disabled
CE Input Current
High State, Device Enabled
Low State, Device Disabled
EXT (PIN 5)
f
OSC
V
OUT
=V
SET
×0.96
Ta=-40
V
OUT
=V
SET
×0.96
I
OUT
=0mA
I
OUT
=1mA
240
70
300
0.1
80
800
900
360
90
900
1
%/
%
mV
V
f
~ 85
D
MAX
V
START1
V
START2
V
START
Ta=-40
~ 85
-1.6
mV/
V
OPR
t
SS
I
OUT
=0mA
V
OUT
=V
SET
600
60
700
200
mV
ms
V
CEH
V
CEL
900
mV
mV
V
OUT
=V
SET
×0.96
680
I
CEH
I
CEL
V
OUT
=V
CE
=5.0V
V
OUT
=5.0V, V
CE
=0V
-0.5
0
0
0.5
0.5
μA
μA
0.15
EXT “H”
EXT “L”
R
EXTH
R
EXTL
V
EXT
=V
OUT
-0.4V
V
EXT
=0.4V
6
6
10
10
ON Resistance
TOTAL DEVICE
Output Voltage
Output Voltage temperature
coefficient
Operating Current
Stand-by Current
V
OUT
4.875
5
5.125
V
V
OUT
Ta=-40 ~ 85
150
ppm/
I
DD
I
STN-BY
V
OUT
=V
CE
=V
SET
×0.96
V
OUT
=V
CE
=V
SET
+0.5V
V
OUT
=5.0V, V
CE
=0V,
Ta=-40 ~ +85
I
OUT
= 200mA, V
IN
= 2.0V
136
15
220
38
μA
μA
Off-State Current
I
OFF
0.6
1.5
μA
Efficiency
η
80
88
%
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