IMP1117
ISO 9001 Registered
1A Adjustable/Fixed Low Dropout Linear Regulator
General Description
Key Features
The IMP1117 and IMP1117-1.2,-1.5,-1.8,-2.5,-2.85,-3.3
and-5 are low dropout three-terminal regulators with 1A
output current capability. These devices have been optimized for low voltage where transient response and minimum input voltage are critical. The 2.85V version is designed specifically to be used in Active Terminators for
SCSI bus.
On-chip thermal limiting provides protection against any
combination of overload and ambient temperatures that
would create excessive junction temperatures.
- Low dropout voltage
- Load regulation: 0.05% typical
- Optimized for Low Voltage
- On-chip thermal limiting
- Standard SOT-223 and TO-252 packages
- Three-terminal adjustable or fixed low dropout
1.2V,1.5V,1.8V, 2.5V, 2.85V, 3.3V, 5V. Regulators
Applications
Unlike PNP type regulators where up to 10% of the output
current is wasted as quiescent current, the quiescent current of the IMP1117 flows into the load, increasing efficiency.
- Active SCSI terminators
- High efficiency linear regulators
- Post regulators for switching supplies
- Battery chargers
- 12V to 5V linear regulators
- Motherboard clock supplies
The IMP1117 series regulators are available in the industry-standard SOT-223 and TO-252 power packages.
Typical Application
Figure 1. Typical Applications of IMP1117
Notice: The distance between Vout pin and Capacitor should not exceed 4cm for excellent performance
Daily Silver IMP
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1
IMP1117
ISO 9001 Registered
1A Adjustable/Fixed Low Dropout Linear Regulator
Block Diagram
VIN
Thermal
Limit
Current
Limit
VOUT
Substrate
GND (fixed output)
ADJ. (adjustable output)
Figure 4. Block Diagram of IMP1117
Electrical Characteristic
Typicals and limits appearing in normal type apply for TJ=25℃.Limits appearing in Boldface type apply over the entire junction temperature for
operation,0℃to 125℃.
Max
(Note 2)
Units
1.225
1.250
1.275
V
1.152
1.200
1.248
V
1.470
1.500
1.530
V
IMP1117-1.8 ,3.3V<= VIN<=8.8V
1.764
1.800
1.836
V
IMP1117-2.5 ,4V<= VIN<= 9.5V
2.450
2.500
2.550
V
IMP1117-2.85 , 4.35V <= V IN<= 9.85V
2.793
2.850
2.907
V
IMP1117-3.3 , 4.8V<= VIN <=10.3V
3.234
3.300
3.366
V
IMP1117-5.0,6.5V<=VIN <= 12V
VOUT
Typ
(Note 1)
IMP1117-1.5 ,3.0V<= VIN<=8.5V
VREF
Min
(Note 2)
IMP1117-1.2 ,2.7V<= VIN<=8.2V
Symbol
4.900
5.000
5.100
V
Parameter
Conditions
Reference
IMP1117
Volage
1.5V<=(VIN-VOUT)<=7V,10mA<=IOUT<=1A
Output Voltage
Daily Silver IMP
10mA<=
IOUT<=1A
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