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ADP1110 Datasheet(PDF) 3 Page - Analog Devices

Part No. ADP1110
Description  Micropower, Step-Up/Step-Down Switching Regulator; Adjustable and Fixed 3.3 V, 5 V, 12 V
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Maker  AD [Analog Devices]
Homepage  http://www.analog.com
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ADP1110 Datasheet(HTML) 3 Page - Analog Devices

 
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ADP1110
–3–
REV. 0
PIN DESCRIPTION
Mnemonic
Function
ILIM
For normal conditions this pin is connected to
VIN. When lower current is required, a resistor
should be connected between ILIM and VIN.
Limiting the switch current to 400 mA is
achieved by connecting a 220
Ω resistor.
VIN
Input Voltage.
SW1
Collector Node of Power Transistor. For step-
down configuration, connect to VIN. For step-
up configuration, connect to an inductor/diode.
SW2
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.
GND
Ground.
AO
Auxiliary Gain (GB) Output. The open collec-
tor can sink 300
µA. It can be left open if unused.
SET
Gain Amplifier Input. The amplifier has posi-
tive input connected to SET pin and negative
input connected to 220 mV reference. It can be
left open if unused.
FB/SENSE
On the ADP1110 (adjustable) version this pin
is connected to the comparator input. On the
ADP1110-3.3, ADP1110-5 and ADP1110-12,
the pin goes directly to the internal application
resistor that set output voltage.
ABSOLUTE MAXIMUM RATINGS
Input Supply Voltage, Step-Up Mode . . . . . . . . . . . . . . . 15 V
Input Supply Voltage, Step-Down Mode . . . . . . . . . . . . . 36 V
SW1 Pin Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 V
SW2 Pin Voltage . . . . . . . . . . . . . . . . . . . . . . . . . –0.5 V to V
IN
Feedback Pin Voltage (ADP1110) . . . . . . . . . . . . . . . . . . 5.5 V
Switch Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.5 A
Maximum Power Dissipation . . . . . . . . . . . . . . . . . . 500 mW
Operating Temperature Range . . . . . . . . . . . . . 0
°C to +70°C
Storage Temperature Range . . . . . . . . . . . . .
–65
°C to 150°C
Lead Temperature (Soldering, 10 sec) . . . . . . . . . . . . . 300
°C
TYPICAL APPLICATION
1.5V
AA CELL*
ILIM
VIN
SW1
SW2
GND
ADP1110-5
47µH
5V
15µF
TANTALUM
SENSE
OPERATES WITH CELL VOLTAGE
≥1.0V
*ADD 10µF DECOUPLING CAPACITOR IF BATTERY IS
*MORE THAN 2' AWAY FROM ADP1110.
1
2
3
4
5
8
Figure 1. 1.5 V to 5 V Converter
ORDERING GUIDE
Model
Output Voltage
Package
ADP1110AN
ADJ
N-8
ADP1110AR
ADJ
SO-8
ADP1110AN-3.3
3.3 V
N-8
ADP1110AR-3.3
3.3 V
SO-8
ADP1110AN-5
5 V
N-8
ADP1110AR-5
5 V
SO-8
ADP1110AN-12
12 V
N-8
ADP1110AR-12
12 V
SO-8
WARNING!
ESD SENSITIVE DEVICE
CAUTION
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 ADP1110 features proprietary ESD protection circuitry, permanent damage may
occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD
precautions are recommended to avoid performance degradation or loss of functionality.
8-Lead SOIC
(SO-8)
A0
ILIM
SW1
GND
VIN
SW2
FB (SENSE)*
SET
1
2
3
4
8
7
6
5
TOP VIEW
(Not to Scale)
ADP1110
*FIXED VERSIONS
TJMAX = 90
o,
θ
JA = 150
oC/W
8-Lead Plastic DIP
(N-8)
A0
ILIM
SW1
GND
VIN
SW2
*FIXED VERSIONS
FB (SENSE)*
SET
1
2
3
4
8
7
6
5
ADP1110
TOP VIEW
(Not to Scale)
TJMAX = 90
o,
θ
JA = 130
oC/W
PIN CONFIGURATIONS


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