LT1109
U
O
TYPICAL APPLICATI S
3V to 5V Converter
3-Pin Package Flash Memory VPP Generator
22µH
CADDELL-BURNS
7120-17
33µH
CADDELL-BURNS
1N5818
1N4933
7120-19
5V
V
5V
12V
30mA
IN
100mA AT 3V INPUT
20mA AT 2V INPUT
10k
10k
SW
2N4403
V
OUT
SW
V
2 CELLS
OUT
LT1109CZ-5
GND
+
+
10µF
20V
22µF
16V
LT1109CZ-12
GND
LT1109 • TA06
VN2222
SHUTDOWN
PROGRAM
QUIESCENT CURRENT = 0 IN SHUTDOWN
LT1109 • TA05
3V to 5V Converter with Shutdown
3V to 12V Converter
22µH
L1*
22µH
CADDELL-BURNS
1N5818
7120-17
12V
40mA AT 3V INPUT
15mA AT 2V INPUT
V
IN
SW
SW
MBRS120T3
5V OUTPUT
V
OUT
2 CELLS
LT1109CS8-5
2 CELLS
LT1109CZ-12
GND
+
SDN SENSE
10µF
20V
GND
+
22µF
16V
LT1109 • TA07
SHUTDOWN
*L1 = SUMIDA CD54-220LC
LT1109 • TA08
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-
tationthattheinterconnectionofitscircuitsasdescribedhereinwillnotinfringeonexistingpatentrights.
7
Linear [ Linear ]
