LT1117_02 Datasheet, PDF (9/12 Pages) Linear Technology – 800mA Low Dropout Positive Regulators Adjustable and Fixed 2.85V, 3.3V, 5V

TYPICAL APPLICATIO S
Battery Charger
LT1117
IF
V_IN
IN
OUT
1.25V
R_S
V_OUT
ADJ
R1
( ) ^{VOUT – 1.25V 1 + RR—21}
IF =
( ) ^{–RS 1 + RR—21}
( ) ^{∆IF =}
1
∆V_{OUT –RS 1 + RR—21 LT1117 • TA07}
Improving Ripple Rejection
V_{IN +}
10µF
LT1117
IN
OUT
ADJ
R2
* C1 IMPROVES RIPPLE
REJECTION. X_C SHOULD BE
365Ω
1%
≈ R1 AT RIPPLE FREQUENCY
R1
121Ω
1%
+
C1
10µF
V_IN ≥ 16.5V
150µF
LT1117 • TA09
LT1117/LT1117-2.85
LT1117-3.3/LT1117-5
Battery Backed Up Regulated Supply
V_IN
+
10µF
SELECT FOR
CHARGE RATE
+
6.5V
10µF
LT1117-5
IN
OUT
GND
50Ω
5.2V LINE
5.0V BATTERY
LT1117-5
IN
OUT
GND
+
100µF
LT1117 • TA08
Automatic Light Control
LT1117
+
IN
OUT
10µF
ADJ
1.2k
100µF
LT1117 • TA10
High Efficiency Dual Supply
FEEDBACK PATH
MUR410
+
3.3V OUTPUT (TYPICAL)
470µF
+V_IN
SWITCHING
REGULATOR
MUR410
+
LT1117-5
IN
OUT
GND
+
470µF
10µF
+5V
0.5A
1N4002
MUR410
+
LT1117-5
IN
OUT
GND
+
470µF
10µF
1N4002
–5V
0.5A
LT1117 • TA11
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