Document
UNISONIC TECHNOLOGIES CO., LTD
278RXX
LINEAR INTEGRATED CIRCUIT
4 TERMINAL 2A OUTPUT LOW DROP VOLTAGE REGULATOR
DESCRIPTION
The UTC 278RXX Series are Low Drop Voltage Regulator suitable for various electronic equipments.
It provides constant voltage power source with TO-220F-4 terminal lead full molded PKG. The Regulator has multi function such as over current protection, overheat protection and ON/OFF control.
1
TO-220F-4
FEATURES
* 2.0A Output Low Drop Voltage Regulator. * Built in ON/OFF Control Terminal. * Built in Over Current Protection, Over Heat Protection Function.
ORDERING INFORMATION
Note:
Ordering Number
Lead Free
Halogen Free
278RXXL-TF4-T
278RXXG-TF4-T
xx: Output Voltage, refer to Marking Information.
Package TO-220F-4
Packing Tube
278RXXG-TF4-T
(1)Packing Type (2)Package Type (3)Green Package (4)Voltage Code
(1) T: Tube (2) TF4: TO-220F-4 (3) G: Halogen Free and Lead Free, L: Lead Free (4) XX: Refer to Marking Information
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QW-R102-048.G
278RXX
MARKING INFORMATION
PACKAGE TO-220F-4
VOLTAGE CODE 05: 5.0V 06: 6.0V 08: 8.0V 12: 12V 15: 15V 33: 3.3V
PIN CONFIGURATION
LINEAR INTEGRATED CIRCUIT
Voltage Code Lot Code
MARKING
UTC 278RXX
L: Lead Free G: Halogen Free
Date Code
UTC 278RXX
12 34
VIN VO GND Control
PIN DESCRIPTION
PIN NO. 1 2 3 4
PIN NAME VIN VOUT GND
Control
Input DC supply voltage Output voltage pin Ground pin for the IC ON/OFF control pin
DESCRIPTION
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QW-R102-048.G
278RXX
BLOCK DIAGRAM
VIN 1
LINEAR INTEGRATED CIRCUIT
2 VO
BANDGAP REFERENCE
ASO PROTECTION
Control 4
OUTPUT ON/OFF CONTROL
OVER HEAT PROTECTION
3 GND
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QW-R102-048.G
278RXX
LINEAR INTEGRATED CIRCUIT
ABSOLUTE MAXIMUM RATING (TA=25°C, unless otherwise specified)
PARAMETER
SYMBOL
REMARK
RATINGS
UNIT
Input Voltage
VIN
35 V
ON/OFF Control Voltage
VC
35 V
Output Current
IO
2A
Power Dissipation 1
PD1 No heatsink
1.5 W
Junction Temperature
TJ
+150
°C
Operating Temperature
TOPR
-20 ~ +80
°C
Storage Temperature
TSTG
-30 ~ +150
°C
Note: Absolute maximum ratings are those values beyond which the device could be permanently damaged.
Absolute maximum ratings are stress ratings only and functional device operation is not implied.
THERMAL DATA
PARAMETER Junction to Ambient Junction to Case
SYMBOL θJA θJC
RATINGS 83 8
ELECTRICAL CHARACTERISTICS (TA=25°C, IO=1.0A, unless otherwise specified)
UNIT °C/W °C/W
For 278R05 (VIN=7V) PARAMETER
Output Voltage Load Regulation Line Regulation Ripple Rejection Drop Out Voltage (Note) Output ON State for Control Voltage Output ON State for Control Current Output OFF State for Control Voltage Output OFF State for Control Current Quiescent Current
For 278R06 (VIN=8V) PARAMETER
Output Voltage Load Regulation Line Regulation Ripple Rejection Drop Out Voltage (Note) Output ON State for Control Voltage Output ON State for Control Current Output OFF State for Control Voltage Output OFF State for Control Current Quiescent Current
SYMBOL VO
Reg Load Reg Line
R·R
VD VC(ON) IC(ON) VC(OFF) IC(OFF)
IQ
TEST CONDITIONS
IO=5mA~2A VIN=6~12V
IO=2A
VC=2.7V
VC=0.4V IO=0
MIN 4.875
45 2.0
TYP 5.0 0.1 0.5 55
MAX 5.125
2.0 2.5
0.5
20 0.8 0.4 10
UNIT V % % dB V V μA V mA mA
SYMBOL VO
Reg Load Reg Line
R·R
VD VC(ON) IC(ON) VC(OFF) IC(OFF)
IQ
TEST CONDITIONS
IO=5mA~2A VIN=7~13V
IO=2A
VC=2.7V
VC=0.4V IO=0
MIN 5.850
45 2.0
TYP 6.0 0.1 0.5 55
MAX 6.150
2.0 2.5
0.5
20 0.8 0.4 10
UNIT V % % dB V V μA V mA mA
UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw
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QW-R102-048.G
278RXX
LINEAR INTEGRATED CIRCUIT
ELECTRICAL CHARACTERISTICS (Cont.)
For 278R08 (VIN=10V) PARAMETER
Output Voltage Load Regulation Line Regulation Ripple Rejection Drop Out Voltage (Note) Output ON State for Control Voltage Output ON State for Control Current Output OFF State for Control Voltage Output OFF State for Control Current Quiescent Current
For 278R12 (VIN=18V) PARAMETER
Output Voltage Load Regulation Line Regulation Ripple Rejection Drop Out Voltage (Note) Output ON State for Control Voltage Output ON State for Control Current Output OFF State for Control Voltage Output OFF State for Control Current Quiescent Current
SYMBOL VO
Reg Load Reg Line
R·R
VD VC(ON) IC(ON) VC(OFF) IC(OFF)
IQ
TEST CONDITIONS
IO=5mA~2A VIN=9~15V
IO=2A
VC=2.7V
VC=0.4V IO=0
MIN 7.800
45 2.0
TYP 8.0 0.1 0.5 55
MAX 8.200
2.0 2.5
0.5
20 0.8 0.4 10
UNIT V % % dB V V μA V mA mA
SYMBOL VO
Reg Load Reg Line
R·R
VD VC(ON) IC(ON) VC(OFF) IC(OFF)
IQ
TEST CONDITIONS
IO=5mA~2A VIN=13~29V
IO=2A
VC=2.7V
VC=0.4V IO=0
MIN 11.70
45 2.0
TYP 12.0 0.1 0.5 55
MAX 12.30
2.0 2.5
0.5
20 0.8 0.4 10
UNIT V % % dB V V μA V mA mA
For 278R15 (VIN=21V) PARAMETER
Output Voltage Load Regulation Line Regulation Ripple Rejection Drop Out Voltage (Not.