ADP3000AN AD [Analog Devices], ADP3000AN Datasheet - Page 3

• Manufacturer Part Number: ADP3000AN
• Description: Micropower Step-Up/Step-Down Fixed 3.3 V, 5 V, 12 V and Adjustable High Frequency Switching Regulator
• Manufacturer: AD [Analog Devices]

Mnemonic
I
V
SW1
SW2
GND
AO
SET
FB/SENSE
Figure 3a. Functional Block Diagram for Adjustable Version
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 ADP3000 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.
REV. 0
LIM
IN
V
IN
REFERENCE
1.245V
GND
For normal conditions this pin is connected to
V
should be connected between I
Limiting the switch current to 400 mA is
achieved by connecting a 220
Input Voltage.
Collector of power transistor. For step-down
configuration, connect to V
configuration, connect to an inductor/diode.
Emitter 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.
Ground.
Auxiliary Gain (GB) output. The open col-
lector can sink 300 A. It can be left open
if not used.
SET Gain amplifier input. The amplifier’s
positive input is connected to SET pin and its
negative input is connected to 1.245 V. It can
be left open if not used.
On the ADP3000 (adjustable) version, this pin
is connected to the comparator input. On the
ADP3000-3.3, ADP3000-5 and ADP3000-12,
the pin goes directly to the internal resistor
divider that sets the output voltage.
Function
IN
PIN DESCRIPTIONS
SET
. When lower current is required, a resistor
FB
COMPARATOR
A2
A1
GAIN BLOCK/
ERROR AMP
OSCILLATOR
ADP3000
IN.
DRIVER
For step-up
LIM
resistor.
and V
A0
I
SW1
SW2
LIM
IN.
–3–
Model
ADP3000AN-3.3
ADP3000AR-3.3
ADP3000AN-5
ADP3000AR-5
ADP3000AN-12
ADP3000AR-12
ADP3000AN
ADP3000AR
N = plastic DIP, SO = small outline package.
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
Feedback Pin Voltage (ADP3000) . . . . . . . . . . . . . . . . . .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
Thermal Impedance
SO-8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 170 C/W
N-8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120 C/W
Figure 3b. Functional Block Diagram for Fixed Version
SW1
SW2
8-Lead Plastic DIP
I
V
LIM
IN
V
IN
* FIXED VERSIONS
1
2
3
4
(Not to Scale)
ADP3000
(N-8)
TOP VIEW
REFERENCE
1.245V
GND
R1
PIN CONFIGURATIONS
8
7
6
5
ORDERING GUIDE
SET
FB (SENSE)*
SET
AO
GND
COMPARATOR
R2
A1
SENSE
GAIN BLOCK/
ERROR AMP
Output
Voltage
3.3 V
3.3 V
5 V
5 V
12 V
12 V
Adjustable
Adjustable
OSCILLATOR
SW1
SW2
WARNING!
I
V
LIM
IN
8-Lead SOIC
1
2
3
4
* FIXED VERSIONS
ADP3000
(Not to Scale)
ADP3000
(SO-8)
TOP VIEW
ADP3000
ESD SENSITIVE DEVICE
DRIVER
8
7
6
5
Package
Option
N-8
N-8
SO-8
N-8
N-8
SO-8
FB (SENSE)*
SET
AO
GND
SO-8
SO-8
A0
I
SW1
SW2
LIM
IN