UTC1117 查看數據表（PDF） - Unspecified
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UTC1117 Datasheet PDF : 7 Pages
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UTC1117
LINEAR INTEGRATED CIRCUIT
ORDERING INFORMATION
PART NUMBER OUTPUT VOLTAGE
UTC1117ACGT
1.30 to 12.0
UTC1117CCGT
3.3
UTC1117ACCT
1.30 to 12.0
UTC1117CCCT
3.3
# represents the date code
PACKAGE
SOT-223
TO-252
(DPAK)
MARKING
ABE###
ABF###
UTC1117
ACCT ####
UTC1117
CCCT ####
OPERATING TEMP. RANGE
0°C to =125°C
0°C to =125°C
0°C to =125°C
0°C to =125°C
APPLICATION DESCRIPTIONS
1. Output voltage adjustment
Like most regulators, the UTC1117 regulates the
output by comparing the output voltage to an internally
generated reference voltage. On the adjustable version, VIN
the VREF is available externally as 1.25V between VOUT
and ADJ. The voltage ratio formed by R1 and R2
should be set to conduct 10mA (minimum output load).
The output voltage is given by the following equation:
× VOUT=VREF(1+ R2 )+LADJ R2
R1
On fixed versions of UTC1117, the voltage divider is
provided internally.
3 IN
IADJ
50µ
A
ADJ OUT 2
1
VREF
VOUT
R1
R2
× VOUT=VREF(1+ R2 )+LADJ R2
R1
2.Thermal Protection
UTC1117 has thermal protection which limits junction temperature to 150°C. However, device functionality is
only guaranteed to a maximum junction temperature of +125°C. The power dissipation and junction temperature for
UTC1117 in DPAK package are given by
× PD=(VIN-VOUT) LOUT
×θ TJUNCTION=TAMBIENT+(PD
JA)
Note: TJUNCTION must not exceed 125°C
3.Current Limit Protection
UTC1117 is protected against overload conditions. Current protection is triggered at typically 1.5A..
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