AMS1117-2.85 AMS [Advanced Monolithic Systems Ltd], AMS1117-2.85 Datasheet

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AMS1117-2.85

Manufacturer Part Number
AMS1117-2.85
Description
1A Adjustable/Fixed Low Dropout Linear Regulator
Manufacturer
AMS [Advanced Monolithic Systems Ltd]
Datasheet

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AMS1117-2.85
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1A Adjustable/Fixed Low Dropout Linear Regulator
The AMS1117-ADJ and AMS1117-1.2,-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.
Unlike PNP type regulators where up to 10% of the output
current is wasted as quiescent current, the quiescent cur-
rent of the AMS1117 flows into the load, increasing effi-
ciency.
The AMS1117 series regulators are available in the indus-
try-standard SOT-223 and TO-252 power packages.
Typical Application
General Description
Notice: The distance between Vout pin and Capacitor should not exceed 4cm for excellent performance
Figure 1. Typical Applications of AMS1117
Advanced Monolithic Systems
1
http://www.ams-semitech.com
- Active SCSI terminators
- High efficiency linear regulators
- Post regulators for switching supplies
- Battery chargers
- 12V to 5V linear regulators
- Motherboard clock supplies
- Low dropout voltage
- Load regulation: 0.2% 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
Key Features
Applications
AMS1117

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AMS1117-2.85 Summary of contents

Page 1

... Unlike PNP type regulators where up to 10% of the output current is wasted as quiescent current, the quiescent cur- rent of the AMS1117 flows into the load, increasing effi- ciency. The AMS1117 series regulators are available in the indus- try-standard SOT-223 and TO-252 power packages. ...

Page 2

... Adjustable/Fixed Low Dropout Linear Regulator Pin Assignments Figure 2. Pin Assignments of AMS1117 *With package soldered to 0.5 square inch copper area over backside ground plane or internal power plane, Θ more than 50°C/W. Other mounting techniques may provide better thermal resistance than 30°C/W. Absolute Maximum Ratings ...

Page 3

... AMS1117 1.5V<=(V -V )<=7V,10mA<=I <=1A IN OUT OUT I = 10mA 3.2V OUT IN AMS1117-1.2 ,2.7V<= V <=8.2V IN AMS1117-1.5 ,3.0V<= V <=8.5V IN AMS1117-1.8 ,3.3V<= V <=8.8V IN AMS1117-2.5 ,4V<= V <= 9.5V IN AMS1117-2.85 , 4.35V <= V <= 9.85V IN AMS1117-3.3 , 4.8V<= V <=10.3V IN AMS1117-5.0,6.5V<=V <= 12V IN 3 http://www.ams-semitech.com AMS1117 Current Limit Substrate Min Typ (Note 2) (Note 2) (Note 1) 1.250 1.225 1.200 1.176 1.200 1.152 1 ...

Page 4

... IN OUT V =V +1.25V IN OUT T = 25°C, 30ms pulse A f=120Hz,V -V =3V, V =1V IN OUT Ripple PP 1.5V<=V -V <=7V, 10mA<=I <=1A IN OUT OUT T = 125°C, 1000hrs http://www.ams-semitech.com AMS1117 Min Typ Max (Note 2) (Note 1) (Note 2) 0.035 0.2 0.2 0.7 0.2 1 1.100 1.250 1.1 1 0.01 0 120 0.2 5 0.5 0.3 Units % % ...

Page 5

... Advanced Monolithic Systems (Continued) =25℃.Limits appearing in Boldface type apply over the entire junction temperature for J Conditions (Note 25°C, 10Hz<= f <=10kHz A SOT-223 TO-252 Junction Temperature 0.8 1.0 5 http://www.ams-semitech.com AMS1117 Min Typ Max (Note 1) (Note 2) 0.003 15 3 155 25 Units % ℃/ ℃ ...

Page 6

... Junction Temperature ( ℃ ) Figure 6. Output Voltage VS. Temperature 100 -75 –50 – 100 125 150 175 Junction Temperature ( ℃ ) Figure 8. ADJ Pin Current VS. Temperature 6 http://www.ams-semitech.com AMS1117 Note: AMS1117 Only ...

Page 7

... Max. Ñ .071 Ñ .181 .033 .064 0.90 Ñ 6.30 .264 3.30 .148 2.95 .124 .041 .840 6.71 .287 Ñ .310 Ñ 10° 16° 10° .0040 .0203 16° 10° .014 .250 Figure 9. 4-Lead SOT-223 Package 7 http://www.ams-semitech.com AMS1117 Notes 1.80 4.80 .840 2.29 6.71 3.71 3.15 1.04 7.29 Ñ 10° 16° .1018 16° .360 ...

Page 8

... Figure 10. 3-Lead TO-252 Package 8 http://www.ams-semitech.com AMS1117 1. Dimensions are exclusive of mold flash, metal burrs or interlead protrusion. 2. Stand off-height is measured from lead tip with ref. to Datum –B-. 3. Foot length is measured with ref. to Datum –A– with lead surface. 4. Thermal pad contour optional within dimension b3 and L3 ...

Page 9

... AMS1117-2.5 2.5V AMS1117-2.85 2.85V AMS1117-3.3 3.3V 5V AMS1117-5 AMS1117 Adjust 1.2V AMS1117-1.2 AMS1117-1.5 1.5V 1.8V AMS1117-1.8 AMS1117-2.5 2.5V AMS1117-2.85 2.85V AMS1117-3.3 3.3V 1117-5 5.0V AMS1117CD Adjust 9 http://www.ams-semitech.com AMS1117 Packing Marking Transport Media AMS 1117 1.2 2.5 K Tape and Reel AMS 1117 1.5 2.5 K Tape and Reel AMS 1117 1.8 2.5K Tape and Reel AMS 1117 2.5 2 ...

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