ADP3050-3.3 Analog Devices, ADP3050-3.3 Datasheet - Page 3

• Manufacturer Part Number: ADP3050-3.3
• Description: 200 Khz, 1 a Step-down High-voltage Switching Regulator
• Manufacturer: Analog Devices

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 this device 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.
ABSOLUTE MAXIMUM RATINGS
IN Voltage
BOOST Voltage
SD, BIAS Voltage . . . . . . . . . . . . . . . . . –0.3 V to IN + 0.3 V
FB Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to +8 V
COMP Voltage . . . . . . . . . . . . . . . . . . . –0.3 V to IN + 0.3 V
SWITCH Voltage . . . . . . . . . . . . . . . . . –0.3 V to IN + 0.3 V
Operating Ambient Temperature Range . . . . –40°C to +85°C
Operating Junction Temperature Range . . . –40°C to +125°C
Storage Temperature Range . . . . . . . . . . . . –65°C to +150°C
θ
θ
Lead Temperature Range (Soldering, 60 sec) . . . . . . . . 300°C
Model
ADP3050AR
ADP3050AR-3.3
ADP3050AR-5
This is a stress rating only; operation beyond these limits can cause the device to
SO = Small Outline Package
JA
JA
be permanently damaged. Unless otherwise specified, all voltages are referenced
to GND
Continuous . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to +40 V
Peak (<100 ms) . . . . . . . . . . . . . . . . . . . . . –0.3 V to +60 V
Continuous . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to +45 V
Peak (<100 ms) . . . . . . . . . . . . . . . . . . . . . –0.3 V to +65 V
(2-Layer PCB) . . . . . . . . . . . . . . . . . . . . . . . . . . 108°C/W
(4-Layer PCB) . . . . . . . . . . . . . . . . . . . . . . . . . . . 81°C/W
SWITCH
BOOST
PIN CONFIGURATION
BIAS
ORDERING GUIDE
Output
Voltage Range
ADJ
3.3 V
5.0 V
FB
8-Lead SOIC
1
2
3
4
(R-Suffix)
(Not to Scale)
ADP3050
TOP VIEW
–40
–40
–40
Temperature
°
°
°
C to +85
C to +85
C to +85
8
7
6
5
IN
GND
SD
COMP
°
°
°
C
C
C
Package
SO-8
SO-8
SO-8
Pin Mnemonic Function
1
2
3
4
5
6
7
8
SWITCH
BOOST
BIAS
FB
COMP
SD
GND
IN
PIN FUNCTION DESCRIPTION
This is the emitter of the internal NPN
power switch. The voltage at this pin switches
between V
This pin is used to provide a boosted voltage
(higher than V
NPN power switch. With the higher drive
voltage, the power switch can be saturated,
greatly reducing the switch power losses.
Connect this pin to the regulated output
voltage to maximize system efficiency.
When this pin is above 2.7 V, most of the
ADP3050 operating current will be taken
from the output instead of the input supply.
Leave unconnected if not used.
This feedback pin senses the regulated output
voltage. Connect this pin directly to the out-
put (fixed output versions).
This pin is used to compensate the regulator
with an external resistor and capacitor. This
pin can be used to override the control loop,
but the voltage on this pin should not exceed
about 2 V, as the pin is internally clamped to
ensure a fast transient response. Use a pull-up
resistor if this pin is to be pulled higher than 2 V.
Use this pin to turn the device on and off. If
this feature is not needed, tie this pin directly
to V
Connect this pin to local ground plane.
Connect this pin to the input supply voltage.
An input bypass capacitor must be placed
close to this pin to ensure proper regulator
operation.
IN
.
IN
and approximately –0.5 V.
IN
) for the drive stage of the
ADP3050