CYStech Electronics Corp.
1A Low Dropout Positive Voltage Regulator
Spec. No. : C506M3
Issued Date : 2007.07.10
Revised Date :2013.06.19
Page No. : 1/7
LM1117M3 series
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
●
Can operate using MLCCs in the capacitance
range of 2μF to 10μF
●
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
LM1117M3 series
R2
232Ω, 1%
C2
10μF, Tan. Min
CYStek Product Specification
CYStech Electronics Corp.
Package Information
Pin
1
2
3
Name
ADJ/GND
OUTPUT
INPUT
Spec. No. : C506M3
Issued Date : 2007.07.10
Revised Date :2013.06.19
Page No. : 2/7
1
2
SOT-89
3
Absolute Maximum Ratings
Symbol
P
D
V
IN
T
OPR
T
STG
T
MJ
Parameter
Power Dissipation
Input Voltage
Operating Junction Temperature Range
Storage Temperature
Maximum Junction Temperature
Maximum
330
-0.3 ~ +15
-40 ~ +125
-65 ~ +150
150
Units
mW
V
℃
℃
℃
Device Selection Guide
Device
LM1117-ADJM3
LM1117-1.5M3
LM1117-1.8M3
LM1117-2.5M3
LM1117-3.3M3
LM1117-5.0M3
Output Voltage
Adjustable
1.5V
1.8V
2.5V
3.3V
5.0V
Package
SOT-89
(Pb-free lead plating and
halogen-free package)
Shipping
1000 pcs / Tape & Reel
Block Diagram
LM1117M3 series
CYStek Product Specification
CYStech Electronics Corp.
Spec. No. : C506M3
Issued Date : 2007.07.10
Revised Date :2013.06.19
Page No. : 3/7
Electrical Characteristics
@ I
O
=10mA,T
J
=25℃, unless otherwise specified
Parameter
Reference voltage
Output Voltage
Device
LM1117-1.5
LM1117-1.8
LM1117-2.5
LM1117-3.3
LM1117-5.0
All version
LM1117-ADJ
Test Conditions
Min
1.470
1.764
2.450
3.235
4.900
-
-
-
-
-
-
-
-
1.1
-
-
-
-
60
-
-
Control Circuitry/ Power transistor
-
Typ
1.500
1.800
2.500
3.300
5.000
-
-
12
15
20
26
40
1.3
-
5
50
-
0.008
70
0.5
300
100
Max
1.530
1.836
2.550
3.365
5.100
0.2
1
15
18
25
33
50
1.4
-
10
100
12
0.04
-
-
-
-
Units
V
V
V
V
V
V
%
%
mV
mV
mV
mV
mV
V
A
mA
μA
mA
%/W
dB
%
℃/W
℃/W
Adj version V
IN-
V
OUT
=1.5V
3.0V≤V
IN
≤12V
3.3V≤V
IN
≤12V
4.0V≤V
IN
≤12V
4.8V≤V
IN
≤12V
6.5V≤V
IN
≤12V
V
OUT
+1.5V≤V
IN
≤12V
V
IN
=3.3V, Vadj=0, 10mA≤I
O
≤1A
LM1117-1.5 V
IN
=3.0V, 0mA≤I
O
≤1A
LM1117-1.8 V
IN
=3.3V, 0mA≤I
O
≤1A
LM1117-2.5 V
IN
=4.0V, 0mA≤I
O
≤1A
LM1117-3.3 V
IN
=5.0V, 0mA≤I
O
≤1A
LM1117-5.0 V
IN
=8.0V, 0mA≤I
O
≤1A
Dropout Voltage
(V
IN
-V
OUT
)
Current Limit
Minimum Load
Current
Adjust Pin Current
Quiescent Current
Thermal Regulation
Ripple Rejection
Temperature Stability
Thermal Resistance,
Junction to Ambient(
No heat sink, no air
flow)
Thermal Resistance,
Junction to Case
All version
All version
Adj version
I
O
=1A (ΔV
OUT
=1%V
OUT
)
V
IN
-V
OUT
=5V
V
IN
=5V
1.225 1.250 1.275
Line Regulation
Load Regulation
(Note 1, 2)
Adj version V
IN
=12V, I
O
=10mA
Fixed version V
IN
=12V, I
O
=0mA
All version
All version
All version
All version
All version
T
A
=25℃, 30ms pulse
f=120Hz, V
IN
=V
OUT
+3V, I
O
= 1A,
C
OUT
=25μF tantalum
I
O
= 10mA
Note : 1.See thermal regulation specifications for changes in output voltage due to heating effects. Line and load regulation are measured at
a constant junction temperature by low duty cycle pulse testing. Load regulation is measured at the output lead 1/18” from the
package.
2. Line and load regulation are guaranteed up to the maximum power dissipation of 3W. Power dissipation is determined by the
difference in input and output and the output current. Guaranteed maximum power dissipation will not be available over the full
input/output range.
LM1117M3 series
CYStek Product Specification
Analog electronics
京公网安备 11010802033920号
EEWORLD
