ADP3303AR-2.7-ADP3303AR-3.3 Fast Delivery |IC PHOENIX CO.,LIMITED

ADP3303AR-3.3 ,High Accuracy anyCAP® 200 mA Low Dropout Linear RegulatorSpecifications subject to change without notice.REV. A–2–ADP3303ABSOLUTE MAXIMUM RATINGS*PIN FUNCTI ..
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ADP3307ART-2.85 ,OutputV: 2.85V; high accuracy anyCAP 100mA low dropout lionear regulator. For cellular telephones, notebook, palmtop computers, battery powered systems, PCMCIA regulator, bar code scanners, camcorders, camerasspecifications apply to all voltage options.Parameter Symbol Conditions Min Typ Max UnitOUTPUT VOLT ..
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ADP3303AR-2.7-ADP3303AR-3.3
High Accuracy anyCAP® 200 mA Low Dropout Linear Regulator
REV.A
High Accuracy anyCAP™
200 mA Low Dropout Linear Regulator
FUNCTIONAL BLOCK DIAGRAM
Figure 1.Typical Application Circuit
FEATURES
High Accuracy Over Line and Load 60.8% @ at +258C,
61.4% Over Temperature
Ultralow Dropout Voltage: 180 mV (Typ) @ 200 mA
Requires Only CO = 0.47 mF for Stability
anyCAP = Stable with All Types of Capacitors
(Including MLCC)
3.2 V to 12 V Supply Range
Current and Thermal Limiting
Low Noise
Dropout Detector
Low Shutdown Current: < 1 mA
Thermally Enhanced SO-8 Package
Excellent Line and Load Regulation Performance
APPLICATIONS
Cellular Telephones
Notebook, Palmtop Computers
Battery Powered Systems
Portable Instruments
Post Regulator for Switching Supplies
Bar Code Scanners
GENERAL DESCRIPTION
The ADP3303 is a member of the ADP330x family of preci-
sion low dropout anyCAP voltage regulators. The ADP3303
stands out from the conventional LDOs with a novel architec-
ture, an enhanced process and a new package. Its patented
design requires only a 0.47mF output capacitor for stability.
This device is insensitive to capacitor Equivalent Series Resis-
tance (ESR) and is stable with any good quality capacitor, in-
cluding ceramic types (MLCC) for space restricted applications.
The ADP3303 achieves exceptional accuracy of –0.8% at room
temperature and –1.4% overall accuracy over temperature, line
and load regulations. The dropout voltage of the ADP3303 is
only 180mV (typical) at 200 mA.
In addition to the new architecture and process, ADI’s new
proprietary thermally enhanced package (Thermal Coastline)
can handle 1 W of power dissipation without external heatsink
or large copper surface on the PC board. This keeps PC board
real estate to a minimum and makes the ADP3303 very attrac-
tive for use in portable equipment.
The ADP3303 operates with a wide input voltage range from
3.2 V to 12 V and delivers a load current in excess of 200 mA.
It features an error flag that signals when the device is about to
lose regulation or when the short circuit or thermal overload
protection is activated. Other features include shutdown and
optional noise reduction capabilities. The ADP330x anyCAP
LDO family offers a wide range of output voltages and output
current levels:
ADP3300 (50 mA, SOT-23)
ADP3301 (100 mA)
ADP3302 (100 mA, Dual Output)
ADP3307 (100 mA, SOT-23-6)
ADP3308 (50 mA, SOT-23-5)
ADP3309 (100 mA, SOT-23-5)
anyCAP is a trademark of Analog Devices Inc.
(@ TA = –208C to +858C, VIN = 7 V, CIN = 0.47 mF, COUT = 0.47 mF, unless
otherwise noted)1ADP3303-xx–SPECIFICATIONS
NOTESAmbient temperature of +85°C corresponds to a typical junction temperature of +125°C under typical full load test conditions.
Specifications subject to change without notice.
CAUTION
ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000V readily
accumulate on the human body and test equipment and can discharge without detection.
Although the ADP3303 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.
PIN FUNCTION DESCRIPTIONS
PIN CONFIGURATION
OUT
OUT
GND
ERR
ABSOLUTE MAXIMUM RATINGS*
Input Supply Voltage . . . . . . . . . . . . . . . . . . . –0.3 V to +16 V
Shutdown Input Voltage . . . . . . . . . . . . . . . . –0.3 V to +16 V
Error Flag Output Voltage . . . . . . . . . . . . . . . –0.3 V to +16 V
Noise Bypass Pin Voltage . . . . . . . . . . . . . . . . –0.3 V to +5 V
Power Dissipation . . . . . . . . . . . . . . . . . . . Internally Limited
Operating Ambient Temperature Range . . . . –20°C to +85°C
Operating Junction Temperature Range . . .–20°C to +125°CJA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .96°C/WJC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55°C/W
Storage Temperature Range . . . . . . . . . . . . –65°C to +150°C
Lead Temperature Range (Soldering 10 sec) . . . . . . . +300°C
Vapor Phase (60 sec) . . . . . . . . . . . . . . . . . . . . . . . +215°C
Infrared (15 sec) . . . . . . . . . . . . . . . . . . . . . . . . . . +220°C
*This is a stress rating only; operation beyond these limits can cause the device to
be permanently damaged.
ORDERING GUIDE
Contact the factory for the availability of other output voltage options.
*SO = Small Outline.
Other Members of anyCAP Family1
NOTESSee individual data sheets for detailed ordering information.SO = Small Outline, SOT = Surface Mount.
ADP3303
–Typical Performance Characteristics
INPUT VOLTAGE – Volts
OUTPUT VOLTAGE – Volts
3.2990
Figure 2.Line Regulation: Output
Voltage vs. Supply Voltage

OUTPUT LOAD – mA
GROUND CURRENT –
1000
Figure 5.Quiescent Current vs. Load
Current

OUTPUT LOAD – mA20200406080100120140160180
INPUT-OUTPUT VOLTAGE – mV
Figure 8.Dropout Voltage vs. Output
Current
Figure 3.Output Voltage vs. Load
Current

TEMPERATURE – 8C
OUTPUT VOLTAGE – %
–0.3
Figure 6.Output Voltage Variation
% vs. Temperature

INPUT VOLTAGE – Volts03043211
INPUT-OUTPUT VOLTAGE – Volts
Figure 9.Power-Up/Power-Down
INPUT VOLTAGE – Volts
GROUND CURRENT –
Figure 4.Quiescent Current vs.
Supply Voltage
TEMPERATURE – 8C
GROUND CURRENT –
500
Figure 7.Quiescent Current vs.
Temperature

Figure 10.Power-Up Transient

TIME – ms
Volts
Figure 11.Line Transient Response
TIME – ms
Volts
3.295
Figure 14.Load Transient for
10 mA to 200 mA Pulse

TIME – ms
Volts
0255101520
Figure 17.Turn Off
TIME – ms
Volts
Figure 12.Line Transient Response
Volts
TIME – sec
200
Figure 15.Short Circuit Current

FREQUENCY – Hz
RIPPLE REJECTION – dB
–1001010010M1k10k100k1M
–40
Figure 18.Power Supply Ripple
Rejection

TIME – ms
Volts
3.295
Figure 13.Load Transient for 10 mA
to 200 mA Pulse

TIME – ms
Volts4020080120160
Figure 16.Turn On
FREQUENCY – Hz
VOLTAGE NOISE SPECTRAL DENSITY –
V/ Hz
1001k100k10k
0.1
Figure 19.Output Noise Density
ADP3303
THEORY OF OPERATION
The new anyCAP LDO ADP3303 uses a single control loop for
regulation and reference functions. The output voltage is sensed
by a resistive voltage divider consisting of R1 and R2, which is
varied to provide the available output voltage options. Feedback
is taken from this network by way of a series diode (D1) and a
second resistor divider (R3 and R4) to the input of an amplifier.
Figure 20.Functional Block Diagram
A very high gain error amplifier is used to control this loop. The
amplifier is constructed in such a way that at equilibrium it
produces a large, temperature proportional input “offset voltage”
that is repeatable and very well controlled. The temperature-
proportional offset voltage is combined with the complementary
diode voltage to form a “virtual bandgap” voltage, implicit in
the network, although it never appears explicitly in the circuit.
Ultimately, this patented design makes it possible to control the
loop with only one amplifier. This technique also improves the
noise characteristics of the amplifier by providing more flexibil-
ity on the tradeoff of noise sources that leads to a low noise
design.
The R1, R2 divider is chosen in the same ratio as the bandgap
voltage to the output voltage. Although the R1, R2 resistor
divider is loaded by the diode D1, and a second divider consist-
ing of R3 and R4, the values are chosen to produce a tempera-
ture stable output. This unique arrangement specifically corrects
for the loading of the divider so that the error resulting from
base current loading in conventional circuits is avoided.
The patented amplifier controls a new and unique noninverting
driver that drives the pass transistor, Q1. The use of this special
noninverting driver enables the frequency compensation to
include the load capacitor in a pole splitting arrangement to
achieve reduced sensitivity to the value, type and ESR of the
load capacitance.
Most LDOs place strict requirements on the range of ESR val-
ues for the output capacitor because they are difficult to sta-
bilize due to the uncertainty of load capacitance and resistance.
Moreover, the ESR value, required to keep conventional LDOs
stable, changes depending on load and temperature. These ESR
limitations make designing with LDOs more difficult because
of their unclear specifications and extreme variations over
temperature.
This is no longer true with the ADP3303 anyCAP LDO. It can
be used with virtually any capacitor, with no constraint on the
minimum ESR. The innovative design allows the circuit to be
stable with just a small 0.47 mF capacitor on the output. Addi-
tional advantages of the pole splitting scheme include superior line
noise rejection and very high regulator gain, which leads to excel-
lent line and load regulation. An impressive –1.4% accuracy is
guaranteed over line, load and temperature.
Additional features of the circuit include current limit, thermal
shutdown and noise reduction. Compared to standard solutions
that give warning after the output has lost regulation, the
ADP3303 provides improved system performance by enabling the
ERR Pin to give warning before the device loses regulation.
As the chip’s temperature rises above 165°C, the circuit acti-
vates a soft thermal shutdown, indicated by a signal low on the
ERR Pin, to reduce the current to a safe level.
To reduce the noise gain of the loop, the node of the main di-
vider network (a) is made available at the noise reduction (NR)
pin, which can be bypassed with a small capacitor (10 nF–100 nF).
APPLICATION INFORMATION
Capacitor Selection
Output Capacitors:as with any micropower device, output
transient response is a function of the output capacitance. The
ADP3303 is stable with a wide range of capacitor values, types
and ESR. A capacitor as low as 0.47 mF is all that is needed for
stability; larger capacitors can be used if high output current
surges are anticipated. The ADP3303 is stable with extremely
low ESR capacitors (ESR » 0), such as Multilayer Ceramic
Capacitors (MLCC) or OSCON.
Input Bypass Capacitor:an input bypass capacitor is not
required; for applications where the input source is high imped-
ance or far from the input pins, a bypass capacitor is recom-
mended. Connecting a 0.47 mF capacitor from the input pins to
ground reduces the circuit’s sensitivity to PC board layout. If a
larger value output capacitor is used, then a larger value input
capacitor is also recommended.
Noise Reduction
A noise reduction capacitor (CNR) can be used to further reduce
the noise by 6 dB–10 dB (Figure 21). Low leakage capacitors in
the 10 nF–100 nF range provide the best performance. Since
the noise reduction pin (NR) is internally connected to a high
impedance node, any connection to this node should be carefully
done to avoid noise pickup from external sources. The pad
connected to this pin should be as small as possible. Long PC
board traces are not recommended.5
OFF
1mF
VOUT = 5VVIN

Partno	Mfg	Dc	Qty	Available	Descript
ADP3303AR-3.3 \|ADP3303AR33		N/a	94	avai	High Accuracy anyCAP® 200 mA Low Dropout Linear Regulator
ADP3303AR-2.7 \|ADP3303AR27	ADI	N/a	15	avai	High Accuracy anyCAP® 200 mA Low Dropout Linear Regulator