HN LT1117

LT1117 1A Low Dropout Voltage Regulator
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2010-version 2
DESCRIPTION
FEATURES
The LT1117 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.
On-chip trimming adjusts the reference voltage to
1%. Current limit the typical value of 1.5A allows to
minimize the stress on both the regulator and the
power source circuitry under overload conditions.
Adjustable or Fixed Output
Output Current of 1A
Low Dropout, 1.3 V typ. at 1A Output Current
0.04% Line Regulation
0.2 % Load Regulation
100% Thermal Limit Burn-In
Fast Transient Response
APPLICATIONS
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High Efficiency Linear Regulators
Post Regulators for Switching Supplies
Adjustable Power Supply
TYPICAL APPLICATION DATA
Fixed Voltage Regulator
LT1117-3.3
S1117M1-3.3
U1
>4.7V
VVININ>4.6V
3
TAB
IN
+
C1
10F Tant
VOUT =3.3V
2
OUT
+
GND
1
C2
10F Tant.Min
Adjustable Voltage Regulator
LT1117-ADJ
S1117M1
U1
IN>4.85V
VV
IN >4.75V
3
TAB
TAB
IN
IN
+
C1
10 F Tant
VOUT =VREF 1+
VOUT =3.45V
2
OUT
OUT
+ C2
10F Tant.Min
R1
133 Ohm, 1%
Adj
Addition
1
R2
232 Ohm, 1%
R2
+IADJR2
R1
Notes:
1) C1 needed if device is far from filter capacitors
2) C2 minimum value required for stability
PACKAGE INFORMATION
1 2 3
1 2 3
1 2 3
PIN
FUNCTION
1
ADJ/GND
2
OUTPUT
3
INPUT
SOT-223
TO-263
TAB IS OUTPUT
TO-220
地址: 南京市珠江路 88 号，新世界中心 B 座 4004 室, 邮编:210008
ADD.: RM. 4004,
BLOCK B,
NEW WORLD CENTER,
电话(TEL.): (86)-25-68853600
NO. 88 ZHUJIANG ROAD,
1
NANJING 210008,
CHINA
传真(FAX): (86)-25-68853600-810
WEB-SITE: WWW.HN-ELEC.COM
LT1117 1A Low Dropout Voltage Regulator
2010-version 2
ABSOLUTE MAXIMUM RATINGS
Symbol
PD
VIN
VIN-VOUT
TJ
T STG
TLEAD
VESD
Parameter
Power Dissipation
Input Voltage
Voltage Difference
Operating Junction Temperature Range
Storage Temperature
Lead Temperature (Soldering, 10 sec)
Minimum ESD Rating (HBM)
Maximum
Internally Limited
13
10
-40 to 125
-65 to 150
300
2
Units
W
V
V
o
C
o
C
o
C
kV
DEVICE SELECTION GUIDE
Device
Output Voltage
LT1117-ADJ
ADJ
LT1117 -1.5
1.5V
LT1117 -1.8
1.8V
LT1117 -2.5
2.5V
LT1117 -2.85
2.85V
LT1117 -3.0
3.0V
LT1117 -3.3
3.3V
LT1117 -3.5
3.5V
LT1117 -5.0
5.0V
Other fixed versions are available Vout = 1.5V to 5.0V
ELECTRICAL CHARACTERISTICS
Electrical Characteristics at ILOAD = 0 mA and TJ = +25C unless otherwise specified.




LT1117-ADJ   ,

All fixed
 
versions
 
  

 
 




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







   

 

LT1117-ADJ 
All fixed
 
versions

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
 
LT1117-ADJ


  

 








 
 
The * denotes the specifications which apply over the full temperature range.
Note 1: Low duty pulse testing with Kelvin connections required.
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
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
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
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
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
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


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


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


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
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

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  
 

 
Note 3: VOUT, VREF=1%
ADD.: RM. 4004,
BLOCK B,
NEW WORLD CENTER,
电话(TEL.): (86)-25-68853600
NO. 88 ZHUJIANG ROAD,
2
NANJING 210008,
CHINA

 
Note 2: 120Hz input ripple (CADJ for ADJ=25F)
地址: 南京市珠江路 88 号，新世界中心 B 座 4004 室, 邮编:210008

传真(FAX): (86)-25-68853600-810
WEB-SITE: WWW.HN-ELEC.COM
LT1117 1A Low Dropout Voltage Regulator
2010-version 2
BLOCK DIAGRAM
地址: 南京市珠江路 88 号，新世界中心 B 座 4004 室, 邮编:210008
ADD.: RM. 4004,
BLOCK B,
NEW WORLD CENTER,
电话(TEL.): (86)-25-68853600
NO. 88 ZHUJIANG ROAD,
3
NANJING 210008,
CHINA
传真(FAX): (86)-25-68853600-810
WEB-SITE: WWW.HN-ELEC.COM
LT1117 1A Low Dropout Voltage Regulator
2010-version 2
TYPICAL APPLICATION CIRCUITS
1.2V to 10V Adjustable Regulator
5V Regulator with Shutdown
LT1117-ADJ
VIN
IN
LT1117-ADJ
VOUT†
OUT
R1
121Ω
ADJ
+
IN
121Ω
1%
10µF
C2
100µF
R2
1k
5V
OUT
ADJ
+
+
C1*
10µF
VIN
+
100µF
1k
2N3904
TTL
365Ω
1%
1k
* NEEDED IF DEVICE IS FAR FROM FILTER CAPACITORS
R2
†V
—
OUT = 1.25V 1 + R1
( )
Adjusting Output Voltage of Fixed Regulators
Regulator with Reference
LT1117-5.0
LT1117-5.0
VIN > 12V
IN
+
OUT
+
GND
10µF
5V TO 10V
VIN > 11.5V
100µF
IN
+
OUT
GND
10µF
+
10V
100µF
5VOUT
+
10µF*
LT1029
1k
* OPTIONAL IMPROVES RIPPLE REJECTION
Low Dropout Negative Supply
LT1117-5.0
VIN
IN
OUT
GND
+
10µF
+
100µF
VOUT = –5V
FLOATING INPUT
地址: 南京市珠江路 88 号，新世界中心 B 座 4004 室, 邮编:210008
ADD.: RM. 4004,
BLOCK B,
NEW WORLD CENTER,
电话(TEL.): (86)-25-68853600
NO. 88 ZHUJIANG ROAD,
4
NANJING 210008,
CHINA
传真(FAX): (86)-25-68853600-810
WEB-SITE: WWW.HN-ELEC.COM