ADP1111 Analog Devices, ADP1111 Datasheet - Page 3

• Manufacturer Part Number: ADP1111
• Description: Micropower, Step-Up/Step-Down SW Regulator; Adjustable and Fixed 3.3 V, 5 V, 12 V
• Manufacturer: Analog Devices

ABSOLUTE MAXIMUM RATINGS
Parameter
Supply Voltage
SW1 Pin Voltage
SW2 Pin Voltage
Feedback Pin Voltage (ADP1111)
Switch Current
Maximum Power Dissipation
Operating Temperature Range
Storage Temperature Range
Lead Temperature (Soldering, 10 sec)
ESD CAUTION
REV. A
INPUT
ADP1111A
3V
10µF
(OPTIONAL)
Figure 1. 3 V to 5 V Step-Up Converter
TYPICAL APPLICATION
ADP1111AR-5
GND
I
LIM
SW2
SENSE
V
IN
SW1
CD54-220K
SUMIDA
22µH
MBRS120T3
Rating
36 V
50 V
−0.5 V to V
5.5 V
0°C to 70°C
−65°C to +150°C
1.5 A
500 mW
300°C
IN
33µF
5V
100mA
3
PIN DESCRIPTIONS
Mnemonic
I
V
SW1
SW2
GND
AO
SET
FB/SENSE
LIM
SW1
SW2
IN
*FIXED VERSIONS
I
V
LIM
IN
8-Lead Plastic DIP
1
2
3
4
(Not to Scale)
TOP VIEW
ADP1111
(N-8)
Ground.
Function
For normal conditions this pin is connected to V
When lower current is required, a resistor should be
connected between I
current to 400 mA is achieved by connecting a 220 Ω
resistor.
Input Voltage.
Collector Node of Power Transistor. For step-down
con-figuration, connect to V
ration, connect to an inductor/diode.
Emitter Node of Power Transistor. For step-down
configuration, connect to inductor/diode. For step-up
configuration, connect to ground. Do not allow this
pin to go more than a diode drop below ground.
Auxiliary Gain (GB) Output. The open collector can
sink 300 μA. It can be left open if unused.
Gain Amplifier Input. The amplifier’s positive input is
connected to SET pin and its negative input is con-
nected to the 1.25 V reference. It can be left open if
unused.
On the ADP1111 (adjustable) version this pin is con-
nected to the comparator input. On the ADP1111-3.3,
ADP1111-5 and ADP1111-12, the pin goes directly
to the internal application resistor that sets output
voltage.
PIN CONFIGURATIONS
8
7
6
5
FB (SENSE)*
SET
GND
A0
SW1
SW2
*FIXED VERSIONS
I
V
LIM
LIM
IN
8-Lead Plastic SOIC
and V
1
2
3
4
(Not to Scale)
IN
TOP VIEW
ADP1111
(SO-8)
. For step-up configu-
IN
. Limiting the switch
ADP1111
8
7
6
5
GND
FB (SENSE)*
SET
A0
IN
.