ADP3300ART-2.7 ,0.3-16V; high accuracy anyCAP 50mA low dropout linear regulator. For cellular telephones, notebook, palmtop computers, battery powered systems, PCMCIA regulators, bar code scanners, camcoders, camerasSPECIFICATIONS otherwise noted)Parameter Symbol Conditions Min Typ Max UnitOUTPUT VOLTAGE V V = V 0 ..
ADP3300ART-2.7-RL7 ,High Accuracy anyCAP® 50 mA Low Dropout Linear RegulatorFEATURES FUNCTIONAL BLOCK DIAGRAMHigh Accuracy Over Line and Load: 0.8% @ 25C,1.4% Over Temperat ..
ADP3300ART-2.7-RL7 ,High Accuracy anyCAP® 50 mA Low Dropout Linear RegulatorSPECIFICATIONS otherwise noted)Parameter Symbol Conditions Min Typ Max UnitOUTPUT VOLTAGE V V = V 0 ..
ADP3300ART-2.85 ,0.3-16V; high accuracy anyCAP 50mA low dropout linear regulator. For cellular telephones, notebook, palmtop computers, battery powered systems, PCMCIA regulators, bar code scanners, camcoders, camerasSpecifications subject to change without notice.–2– REV. BADP3300ABSOLUTE MAXIMUM RATINGS* PIN FUNC ..
ADP3300ART-3 ,High Accuracy anyCAP 50 mA Low Dropout Linear RegulatorSpecifications subject to change without notice.REV. A–2–ADP3300ABSOLUTE MAXIMUM RATINGS*PIN FUNCTI ..
ADP3300ART-3.2 ,0.3-16V; high accuracy anyCAP 50mA low dropout linear regulator. For cellular telephones, notebook, palmtop computers, battery powered systems, PCMCIA regulators, bar code scanners, camcoders, camerasfeatures an error flag that signals when the device is about toADP3302 (100 mA, Dual Output)lose re ..
AK40A-048L-050F03SM , 15 Watts
AK4112A , High Feature 96kHz 24bit DIR
AK4120VF , Sample Rate Converter with Mixer and Volume
AK4121AVF , Asynchronous Sample Rate Converter
AK4124VF , 192KHZ/ 24BIT HIGH PERFORMANCE ASYNCHRONOUS SRC
AK4125VF , 192kHz / 24Bit High Performance Asynchronous SRC
ADP3300ART-2.7-ADP3300ART-2.85-ADP3300ART-3.2-ADP3300ART-3.3
0.3-16V; high accuracy anyCAP 50mA low dropout linear regulator. For cellular telephones, notebook, palmtop computers, battery powered systems, PCMCIA regulators, bar code scanners, camcoders, cameras
REV.B
High Accuracy anyCAP®
50 mA Low Dropout Linear Regulator
FUNCTIONAL BLOCK DIAGRAM
FEATURES
High Accuracy Over Line and Load: �0.8% @ 25�C,�1.4% Over Temperature
Ultralow Dropout Voltage: 80 mV Typical @ 50 mA
Requires Only CO = 0.47 �F for Stability
anyCAP = Stable with All Types of Capacitors
(Including MLCC)
Current and Thermal Limiting
Low Noise
Dropout Detector
Low Shutdown Current: 1 �A
3.0 V to 12 V Supply Range
–40�C to +85�C Ambient Temperature Range
Several Fixed Voltage Options
Ultrasmall SOT-23 6-Lead Package
Excellent Line and Load Regulation
APPLICATIONS
Cellular Telephones
Notebook, Palmtop Computers
Battery Powered Systems
PCMCIA Regulators
Bar Code Scanners
Camcorders, Cameras
GENERAL DESCRIPTIONThe ADP3300 is a member of the ADP330x family of precision
low dropout anyCAP voltage regulators. The ADP3300 stands
out from conventional LDOs with a novel architecture and an
enhanced process. Its patented design requires only a 0.47 µF
output capacitor for stability. This device is stable with any
capacitor, regardless of its ESR (Equivalent Series Resistance)
value, including ceramic types (MLCC) for space restricted appli-
cations. The ADP3300 achieves exceptional accuracy of ±0.8%
at room temperature and ±1.4% overall accuracy over tempera-
ture, line and load variations. The dropout voltage of the
ADP3300 is only 80 mV (typical) at 50 mA.
The ADP3300 operates with a wide input voltage range from
3.0 V to 12 V and delivers a load current in excess of 50 mA.
It features an error flag that signals when the device is about to
lose regulation or when the short circuit or thermal overload
anyCAP is a registered trademark of Analog Devices Inc.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 from 50 mA to 200 mA:
ADP3301 (100 mA)
ADP3302 (100 mA, Dual Output)
ADP3303 (200 mA)
Figure 1.Typical Application Circuit
ADP3300–SPECIFICATIONS
(@ TA = –40�C to +85�C, VIN = 7 V, CIN = 0.47 �F, COUT = 0.47 �F, unless
otherwise noted)OUTPUT NOISE
NOTE
Ambient 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.
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 . . . . –55°C to +125°C
Operating Junction Temperature Range . . . . –55°C to +125°C
θJA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .165°C/W
θJC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .92°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 tobe permanently damaged.
PIN FUNCTION DESCRIPTIONSContact the factory for the availability of other output voltage options.
ORDERING GUIDE
CAUTIONESD (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 ADP3300 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 CONFIGURATION
ADP3300–Typical Performance CharacteristicsTPC 1.Line Regulation Output
Voltage vs. Supply Voltage
TPC 4.Quiescent Current vs.
Load Current
TPC 7.Dropout Voltage
vs. Output Current
TPC 2.Output Voltage vs. Load
Current
TPC 5.Output Voltage Varia-
tion % vs. Temperature
TPC 8.Power-Up/Power-Down
TPC 3.Quiescent Current vs.
Supply Voltage
TPC 6.Quiescent Current vs.
Temperature
TPC 9.Power-Up Overshoot
TPC 10.Line Transient Response
TPC 13.Load Transient
TPC 16.Turn Off
TPC 11.Line Transient Response
TPC 14.Short Circuit Current
TPC 17.Power Supply Ripple
Rejection
TPC 12.Load Transient
TPC 15.Turn On
TPC 18.Output Noise Density
ADP3300
THEORY OF OPERATIONThe new anyCAP LDO ADP3300 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 option. 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 2.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 complimentary
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 flexibility
on the trade-off 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 consisting
of R3 and R4, the values are chosen to produce a temperature
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
values for the output capacitor because they are difficult to
stabilize due to the uncertainty of load capacitance and resis-
tance. Moreover, the ESR value, required to keep conventional
LDOs stable, changes depending on load and temperature.
These ESR limitations make designing with LDOs more diffi-
cult because of their unclear specifications and extreme variations
over temperature.
This is no longer true with the ADP3300 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
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 the standard solu-
tions that give warning after the output has lost regulation,
the ADP3300 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 activates 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
divider 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:anyCAPOutput Capacitors:as with any micropower device, output
transient response is a function of the output capacitance. The
ADP3300 is stable with a wide range of capacitor values, types
and ESR (anyCAP). A capacitor as low as 0.47 µF is all that is
needed for stability. However, larger capacitors can be used if
high output current surges are anticipated. The ADP3300 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; however, for applications where the input source is high
impedance or far from the input pins, a bypass capacitor is recom-
mended. Connecting a 0.47 µF capacitor from the input to
ground reduces the circuit’s sensitivity to PC board layout. If a
bigger output capacitor is used, the input capacitor should be 1 µF
minimum.
Noise ReductionA noise reduction capacitor (CNR) can be used to further reduce
the noise by 6 dB–10 dB (Figure 3). Low leakage capacitors in
the 10 nF–100 nF range provide the best performance. For load
current less than 200 µA, a 4.7 µF output capacitor provides the
lowest noise and the best overall 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.
Figure 3.Noise Reduction Circuit
