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PDF UTC1117 Data sheet ( Hoja de datos )
| Número de pieza | UTC1117 | |
| Descripción | 1A LOW DROPOUT POSITIVE VOLTAGE REGULATOR | |
| Fabricantes | Hangzhou Silan Microelectronics | |
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UTC1117
LINEAR INTEGRATED CIRCUIT
1A LOW DROPOUT POSITIVE
VOLTAGE REGULATOR
DESCRIPTION
The UTC1117 is a 1A low-dropout positive voltage regulator.
It is available in fixed and adjustable output voltage versions.
Over-current and thermal protection are integrated onto the
chip. Output current will decrease while it reaches the pre-set
current or temperature limit. The dropout voltage is specified at
1.2V Maximum at full rated output current. UTC1117 Series
provides excellent regulation over line, load and temperature
variations.
TO-252
FEATURES
* Low dropout voltage ..............1.2V at 1A
* Adjustable or fixed voltages
* Typical line regulation ....... 0.2%
* Typical load regulation ...... 0.15%
* Adjust pin current less than 90mA
* Over-current protection
* Thermal protection
APPLICATIONS
* High Efficiency Linear Regulators
* 5V to 3.3V Voltage Converter
* Battery Charger
* Post Regulators for Switching supplies
BLOCK DIAGRAM
Input
Current
Limiting
Amplifier
Thermal
Protection
Output
Error Amp.
Bandgap
Reference
ADJ/COM
PIN CONFIGURATION
TO-252 Top View
SOT-223 Top View
123
1: GND/ADJ
2: VOUT
3: VIN
123
1: GND/ADJ
2: VOUT
3: VIN
YOUWANG ELECTRONICS CO.LTD
1
1 page  
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
# represents the date code
3.3
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,
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.
VIN
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
×θTJUNCTION=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..
YOUWANG ELECTRONICS CO.LTD
5
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| Páginas | Total 7 Páginas | |
| PDF Descargar | [ Datasheet UTC1117.PDF ] | |
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