
ADP1109
–3–
REV. 0
PIN FUNCT ION DE SCRIPT IONS
Pin
Mnemonic
Function
1
2, 5, 6
3
4
7
V
IN
NC
SW
GND
SHUTDOWN
Input Supply Voltage.
No Connection.
Collector Node of Power T ransistor.
Ground.
When logic low is applied to this pin,
oscillator is shut down.
On the ADP1109A (Adjustable), this
pin goes directly to the comparator
input. On the ADP1109-3.3,
ADP1109-5 and ADP1109-12, this
pin is connected through the internal
resistor that sets the output voltage.
8
FB(SENSE)
ORDE RING GUIDE
Output
Voltage
Package
Description
Package
Options
Model
ADP1109AN
ADP1109AR
ADP1109AN-3.3
ADP1109AR-3.3
ADP1109AN-5
ADP1109AR-5
ADP1109AN-12
ADP1109AR-12
ADJ
ADJ
3.3 V
3.3 V
5 V
5 V
12 V
12 V
Plastic DIP
Small Outline IC
Plastic DIP
Small Outline IC
Plastic DIP
Small Outline IC
Plastic DIP
Small Outline IC
N-8
SO-8
N-8
SO-8
N-8
SO-8
N-8
SO-8
PIN CONFIGURAT IONS
8-Lead Plastic DIP
(N-8)
TOP VIEW
(Not to Scale)
8
7
6
5
1
2
3
4
NC = NO CONNECT
*FIXED VERSIONS
V
IN
NC
SW
FB(SENSE)*
SHUTDOWN
NC
NC
GND
ADP1109A
8-Lead SOIC
(SO-8)
TOP VIEW
(Not to Scale)
8
7
6
5
1
2
3
4
NC = NO CONNECT
*FIXED VERSIONS
V
IN
NC
SW
GND
FB(SENSE)*
SHUTDOWN
NC
NC
ADP1109A
C AUT ION
ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily
accumulate on the human body and test equipment and can discharge without detection.
Although the ADP1109 features proprietary ESD protection circuitry, permanent damage may
occur on devices subjected to high energy electrostatic discharges. T herefore, proper ESD
precautions are recommended to avoid performance degradation or loss of functionality.
WARNNG
ESD SENSITIVE DEVICE
ABSOLUT E MAX IMUM RAT INGS*
Supply Voltage, V
OUT
. . . . . . . . . . . . . . . . . . . . –0.4 V to 20 V
SW Pin Voltage . . . . . . . . . . . . . . . . . . . . . . . . –0.4 V to 50 V
Shutdown Pin Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . 6.0 V
Switch Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.2 A
Maximum Power Dissipation . . . . . . . . . . . . . . . . . . 300 mW
Operating T emperature Range . . . . . . . . . . . . 0
°
C to +70
°
C
Storage T emperature Range . . . . . . . . . . . . –65
°
C to +150
°
C
Lead T emperature (Soldering, 10 sec) . . . . . . . . . . . +300
°
C
*T his is a stress rating only; operation beyond these limits can cause the device to
be permanently damaged.