Datasheet

9
LT1117/LT1117-2.85
LT1117-3.3/LT1117-5
U
SA
O
PP
L
IC
AT
ITY
P
I
CA
L
Battery Charger Battery Backed Up Regulated Supply
Improving Ripple Rejection Automatic Light Control
1.2k
10µF
+
100µF
LT1117 • TA16
LT1117
IN
ADJ
OUT
R1
121Ω
1%
V
IN
≥ 16.5VV
IN
10µF
C1
10µF
150µF
R2
365Ω
1%
*C1 IMPROVES RIPPLE
REJECTION. X
C
SHOULD BE
≈ R1 AT RIPPLE FREQUENCY
LT1117 • TA14
+
+
LT1117
IN
ADJ
OUT
100µF
5.2V LINE
5.0V BATTERY
V
IN
10µF
LT1117 • TA13
+
50Ω
++
SELECT FOR
CHARGE RATE
6.5V
10µF
LT1117-5
IN
GND
OUT
LT1117-5
IN
GND
OUT
High Efficiency Dual Supply
+5V
0.5A
+V
IN
10µF
LT1117 • TA12
1N4002
470µF
10µF 1N4002
470µF
MUR410
MUR410
MUR410
SWITCHING
REGULATOR
470µF
3.3V OUTPUT (TYPICAL)
–5V
0.5A
+
+
+
+
+
FEEDBACK PATH
LT1117-5
IN
GND
OUT
LT1117-5
IN
GND
OUT
LT1117 • TA10
V
OUT
V
IN
R1
IF
R
S
1.25V
ADJ
LT1117
IN
OUT
V
OUT
– 1.25V 1 +
R2
—
R1
IF =
–R
S
1 +
R2
—
R1
1
=
–R
S
1 +
R2
—
R1
()
∆IF

∆V
OUT
()
()