LTC1478 查看數據表（PDF） - Linear Technology
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LTC1478 Datasheet PDF : 8 Pages
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LTC1477/LTC1478
TYPICAL APPLICATIONS
Adding Short-Circuit Protection to an LT1301 Step-Up Switching Regulator (0.01µA Standby Current)
5V
0.1µF
ON/OFF
VOUT
VOUT
VIN1
VIN2
LTC1477
VINS
VIN3
EN
GND
*COILCRAFT DO1608-103
+
100µF
10V
L1*
10µH
D1
MBRS130LT3
12V
6
7
VIN
2
SEL
SW
4
SENSE
+
LT1301
3 SHDN
PGND
ILIM 5 NC
GND
8
1
0.1µF
47µF
16V
TANT
DN117 • F03
5V to 3.3V Selector Switch with Slope Control and 0.01µA Standby Current
5V
0.1µF
AVOUT
AVIN1
AVOUT
AVIN2
5V/2A OR
3.3V/2A
+
1k
100µF
10V
AVINS
AVIN3
5V ON/OFF*
AEN
GND
LTC1478
GND
BEN
3.3V
BVIN3
BVINS
0.1µF
BVIN2
BVOUT
BVIN1
BVOUT
3.3V ON/OFF*
LTC1477/1478 • TA08
*ALLOW AT LEAST 100ms BETWEEN 5V AND 3.3V SWITCHING FOR DISCHARGE OF 100µF OUTPUT CAPACITOR
Single Li-Ion Cell to 5V Converter/Switch with Load Disconnect Below 2.7V
(2.7V to 4.2V)
+
100µF 562k
16V 1%
SINGLE
Li-Ion
CELL*
432k
1%
22µH
SUMIDA
CD54-220
MBRS130LT3
(5V)
3
4
220k
VIN
SW
6
8
NC
ILIM
SENSE
1
LT1304CS8-5
+
LBI
7
SHDN
2
LBO
5
100µF
10V
TANT
VOUT
VOUT
VIN1
VIN2
LTC1477
VINS
VIN3
EN
GND
LTC1477/1478 • TA09
5V
+
1µF
NC
NC
*PRIMARY Li-Ion BATTERY PROTECTION MUST BE PROVIDED BY AN INDEPENDENT CIRCUIT
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-
tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
7
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