LP3905 Datasheet, PDF (2/24 Pages) National Semiconductor (TI) – Power Management Unit For Low Power Handheld Applications

LP3905
SNVS374D – JUNE 2006 – REVISED MAY 2013
EN2 1
TGND 2
LDO2 3
VIN2 4
LDO1 5
GND 6
EN1 7
SGND
14 FB2
13 GND_B2
12 SW2
11 VIN1
10 SW1
9 GND_B1
8 FB1
Block Diagram
0.47 F
1F
0.47 F
Figure 2. Connection Diagram
14-Pin WSON Package
See Package Number NHL0014B
EN2
GND
LDO1
LDO1
Enable
UVLO
POR
Buck 2
FB 2
GND
SW2
VIN LD01&2
LDO2
LDO2
GND
EN1
Timing and
Enable
Control
Enable
Enable
Vin Buck 1&2
Enable
Thermal
SHDN
SW1
GND
FB1
Buck 1
Figure 3. Simplified Functional Diagram
2.2 H
10 F
10 F
2.2 H
10 F
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