CYStech Electronics Corp.
1A Low Dropout Positive Voltage Regulator
Spec. No. : C506J3
Issued Date : 2007.07.10
Revised Date :2007.12.11
Page No. : 1/5
LM1117-XXXJ3
Features
Adjustable or Fixed Output
●
Output Current of 1A
●
Low Dropout, 1.4V max at 1A Output Current
●
Good Noise Rejection
●
Output Current Limiting
●
Built-in
Thermal Shutdown
●
Fast Transient Response
●
Description
The LM1117 series of positive adjustable and fixed
regulators are designed to provide 1A with high
efficiency. All internal circuitry is designed to
operate down to 1.4V input to output differential.
The product is specifically designed to provide well-
regulated supply for low-voltage IC application such
as high-speed bus termination and low current 3.3V
logic supply, and other applications such as VGA cards.
Applications
High Efficiency Linear Regulators
●
Post Regulators for Switching Supplies
●
Adjustable Power Supply
●
Typical Application Data
Fixed Voltage Regulator
VIN>4.75V
+
3
C1
10μF, Tan.
TAB
IN
GND
1
OUT
2
VOUT=3.3V
+
C2
10μF, Tan. Min
Notes:
1)C1 needed if device is far from filter capacitors
2)C2 minimum value required for stability
Adjustable Voltage Regulator
VIN>4.75V
3
TAB
IN
ADJ
1
OUT
2
R1
133Ω,1%
VOUT=3.45V
+
C1
10μF, Tan.
+
VOUT=VREF×(1+R2/R1)+IADJ×R2
Notes:
1)C1 needed if device is far from filter capacitors
2)C2 minimum value required for stability
R2
232Ω, 1%
C2
10μF, Tan. Min
LM1117-XXXJ3
CYStek Product Specification
CYSTEKEC [ CYSTECH ELECTONICS CORP. ]
