LT1117
1
A Low Dropout Voltage
Regulator
FEATURES
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
DESCRIPTION
2010-version 2
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.
APPLICATIONS
High Efficiency Linear Regulators
Post Regulators for Switching Supplies
Adjustable Power Supply
TYPICAL APPLICATION DATA
Fixed Voltage Regulator
V
IN
>4.7V
V
IN
>4.6V
U1
3
IN
+
C1
10
F Tant
GND
1
TAB
OUT
LT1117-3.3
S1117M1-3.3
2
+
V
OUT
=3.3V
C2
10
F Tant.Min
Adjustable Voltage Regulator
U1
IN
>4.85V
V
V
>4.75V
IN
LT1117-ADJ
S1117M1
3
IN
IN
TAB
TAB
OUT
OUT
Adj
Addition
2
V
OUT
=3.45V
+ C2
10
F Tant.Min
R1
133 Ohm, 1%
R2
232 Ohm, 1%
+
C1
10
F Tant
1
V
OUT
=V
REF
1+
R2
+I
ADJ
R2
R1
Notes:
1) C1 needed if device is far from filter capacitors
2) C2 minimum value required for stability
PACKAGE INFORMATION
PIN
FUNCTION
ADJ/GND
OUTPUT
INPUT
1 2 3
1 2 3
1
2
3
1 2 3
TO-263
SOT-223
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
NANJING 210008,
CHINA
传真(FAX):
(86)-25-68853600-810
WEB-SITE:
WWW.HN-ELEC.COM
NO. 88 ZHUJIANG ROAD,
1
HN [ NANJING HONANO ELECTRONIC CO., LTD. ]
