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UC3550G-XX-AF5-R Datasheet(PDF) 5 Page - Unisonic Technologies

Part # UC3550G-XX-AF5-R
Description  PWM CONTROLLED,PWM/PFM SWITCHABLE STEP-UP DC-DC CONTROLLER
PDF  10 Pages
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Manufacturer  UTC [Unisonic Technologies]
Direct Link  http://www.utc-ic.com
Logo UTC - Unisonic Technologies

UC3550G-XX-AF5-R Datasheet(HTML) 5 Page - Unisonic Technologies

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UC3550
CMOS IC
UNISONICTECHNOLOGIESCO.,LTD
5 of 10
www.unisonic.com.tw
QW-R502-082,B
ELECTRICAL CHARACTERISTICS (Cont.)
UC3550-5.0V
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNIT
OSCILLATOR
Frequency
fOSC
VOUT=VSET×0.96
240
300
360
kHz
Frequency Temperature Coefficient
f
△
Ta=-40°C ~ 85°C
0.1
%/°C
Maximum PWM Duty Cycle
DMAX
VOUT=VSET×0.96
70
80
90
%
Minimum Start-up Voltage
VSTART1 IOUT=0mA
800
900
mV
Minimum Start-up Voltage
VSTART2 IOUT=1mA
900
1
V
Minimum Start-up Voltage
Temperature Coefficient
V
△ START Ta=-40°C ~ 85°C
-1.6
mV/°C
Minimum Operation Hold Voltage
VOPR
IOUT=0mA
600
700
mV
Soft-Start Time
tSS
VOUT=VSET
60
200
ms
CE (PIN 1)
CE Input Voltage :
High State, Device Enabled
VCEH
900
mV
Low State, Device Disabled
VCEL
VOUT=VSET×0.96
680
mV
CE Input Current :
High State, Device Enabled
ICEH
VOUT=VCE=5.0V
-0.5
0
0.5
μA
Low State, Device Disabled
ICEL
VOUT=5.0V, VCE=0V
0
0.15
0.5
μA
EXT (PIN 5)
EXT “H”
REXTH
VEXT=VOUT-0.4V
6
10
Ω
ON Resistance
EXT “L”
REXTL
VEXT=0.4V
6
10
Ω
TOTAL DEVICE
Output Voltage
VOUT
4.875
5
5.125
V
Output Voltage temperature
coefficient
V
△ OUT
Ta=-40 ~ 85°C
150
ppm/°C
Operating Current
IDD
VOUT=VCE=VSET×0.96
136
220
μA
Stand-by Current
ISTN-BY
VOUT=VCE=VSET+0.5V
15
38
μA
Off-State Current
IOFF
VOUT=5.0V, VCE=0V,
Ta=-40 ~ +85°C
0.6
1.5
μA
Efficiency
η
IOUT = 200mA, VIN = 3.0V
80
88
%



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