1A Low Dropout Linear Regulator
AOZ1117
General Description
The AOZ1117 is a low dropout positive adjustable or fixed-...
1A Low Dropout Linear
Regulator
AOZ1117
General Description
The AOZ1117 is a low dropout positive adjustable or fixed-mode
regulator with minimum of 1A output current capability. The product is specifically designed to provide well-regulated supply for low voltage IC applications such as high-speed bus termination and low current 3.3V logic supply. The AOZ1117 is also well suited for other applications such as VGA cards. The AOZ1117 is guaranteed to have lower than 1.4V dropout at full load current making it ideal to provide well-regulated outputs of 1.25V to 5.0V with 2.75V to 14V input supply.
Features
● ● ● ● ● ●
1.4V maximum dropout at full load current Fast transient response Output current limiting Built-in thermal shutdown Good noise rejection 3-terminal adjustable or fixed 1.5V, 1.8V, 2.5V, 3.3V, or 5.0V TO252 package
●
Applications
● ●
PC peripheral Communication
Typical Circuits
Fixed Output Example Fixed Output Example
VIN + 5V
VIN + 5V
3 2
Adjustable Output Adjustable OutputExample Example
VIN 5V VIN ++ 5V
3
3 IN VIN
= 3.3V V = 3.3V VOUT OUT VIN V2 OUT
= 3.3V VOUT = 3.3V VOUT V
VOUT OUT
ADJ/GND
V
2
2 1
3
C1 10μF
VIN C1 10μF
VOUT
1
AOZ1117
ADJ/GND AOZ1117
ADJ/GND 1
1
C2 C2 10μF
10μF
C1 10μF C1
10μF
AOZ1117
ADJ/GND AOZ1117
R1 240Ω R1 R2 390Ω R2
240Ω
C2 10μF C2
10μF
390Ω
! VOUT = VREF x 1 + R2 R1
V = 1.250V VREF x 1 + V REF = OUT
R2 R1
VREF = 1.250V
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Figure 1.
Rev. 1.1 September 2008
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