CYStech Electronics Corp.
1A Low Dropout Positive Voltage Regulator
Spec. No. : C506L3
Issued Date : 2003.03.22
Revised Date :2005.10.07
Page No. : 1/4
LM1117L3
Features
Adjustable or Fixed Output
●
Output Current of 1A
●
Low Dropout, 1.3V max at 1A Output Current
●
0.04% Line Regulation
●
0.2% Load Regulation
●
100% Thermal Limit Burn-in
●
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 1.3V input to output differential.
On-chip trimming adjusts the reference voltage to
1%.
Applications
High Efficiency Linear Regulators
●
Post Regulators for Switching Supplies
●
Adjustable Power Supply
●
Typical Application Data
Fixed Voltage Regulator
V
IN
>4.75V
3
IN
TAB
OUT
GND
2
V
OUT
=3.3V
C1
10μF Tant
1
+
C2
10μF Tant.Min
Adjustable Voltage Regulator
V
IN
>4.75V
IN
C1
10μF, Tant
TAB
V
OUT
=3.45V
OUT
+
ADJ
+
C2
10μF Tant.Min
R2
232 Ohm,1%
V
OUT
=V
REF
×
(1+R2/R1)+I
ADJ
×
R2
Notes:
1) C1 needed if device is far from filter capacitors
2) C2 minimum value required for stability
LM1117L3
CYStek Product Specification
CYSTEKEC [ CYSTECH ELECTONICS CORP. ]
