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PDF ADP1711 Data sheet ( Hoja de datos )
| Número de pieza | ADP1711 | |
| Descripción | (ADP1710 / ADP1711) CMOS Linear Regulator | |
| Fabricantes | Analog Devices | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de ADP1711 (archivo pdf) en la parte inferior de esta página. Total 16 Páginas | ||
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FEATURES
Maximum output current: 150 mA
Input voltage range: 2.5 V to 5.5 V
Light load efficient
IGND = 35 μA with zero load
IGND = 40 μA with 100 μA load
Low shutdown current: <1 μA
Low dropout voltage: 150 mV @ 150 mA load
Initial accuracy: ±1%
Accuracy over line, load, and temperature: ±2%
Stable with small 1μF ceramic output capacitor
16 fixed output voltage options: 0.75 V to 3.3 V (ADP1710)
Adjustable output voltage option: 0.8 V to 5.0 V
(ADP1710 Adjustable)
16 fixed output voltage options with reference bypass:
0.75 V to 3.3 V (ADP1711)
High PSRR: 69 dB @ 1 kHz
Low noise: 40 μVRMS
Excellent load/line transient response
Current limit and thermal overload protection
Logic controlled enable
5-lead TSOT package
APPLICATIONS
Mobile phones
Digital camera and audio devices
Portable and battery-powered equipment
Post dc-dc regulation
GENERAL DESCRIPTION
The ADP1710/ADP1711 are low dropout linear regulators
that operate from 2.5 V to 5.5 V and provide up to 150 mA of
output current. Utilizing a novel scaling architecture, ground
current drawn is a very low 40 μA, when driving a 100 μA
load, making the ADP1710/ADP1711 ideal for battery-
operated portable equipment.
The ADP1710 and the ADP1711 are each available in sixteen
fixed output voltage options. The ADP1710 is also available in
an adjustable version, which allows output voltages that range
from 0.8 V to 5 V via an external divider. The ADP1711 allows
for a reference bypass capacitor to be connected, which reduces
output voltage noise and improves power supply rejection.
150 mA, Low Dropout,
CMOS Linear Regulator
ADP1710/ADP1711
TYPICAL APPLICATION CIRCUITS
VIN = 5V
1µF
ADP1710
1 IN
VOUT = 3.3V
OUT 5
2 GND
1µF
3 EN
NC 4
NC = NO CONNECT
Figure 1. ADP1710 with Fixed Output Voltage, 3.3 V
VIN = 5.5V
1µF
ADP1710
ADJUSTABLE
1 IN
VOUT = 0.8V(1 + R1/R2)
OUT 5
2 GND
1µF
3 EN
ADJ 4
R1
R2
Figure 2. ADP1710 with Adjustable Output Voltage, 0.8 V to 5.0 V
VIN = 5V
1µF
ADP1711
1 IN
OUT 5
VOUT = 3.3V
2 GND
3 EN
10nF
BYP 4
1µF
Figure 3. ADP1711 with Fixed Output Voltage and Bypass Capacitor, 3.3 V
The ADP1710/ADP1711 are optimized for stable operation with
small 1 μF ceramic output capacitors, allowing for good transient
performance while occupying minimal board space. An enable
pin controls the output voltage on both devices. There is also an
under-voltage lockout circuit on both devices, which disables the
regulator if IN drops below a minimum threshold.
An internal soft start gives a typical start-up time of 80 μs.
Short-circuit protection and thermal overload protection
circuits prevent damage to the devices in adverse conditions.
Both the ADP1710 and the ADP1711 are available in tiny
5lead TSOT packages, for the smallest footprint solution to all
your power needs.
Rev. 0
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113
©2006 Analog Devices, Inc. All rights reserved.
1 page  
ADP1710/ADP1711
PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS
IN 1 ADP1710 5 OUT
FIXED
GND 2
TOP VIEW
EN 3 (Not to Scale) 4 NC
NC = NO CONNECT
Figure 4. 5-Lead TSOT (UJ-Suffix)
IN 1 ADP1710 5 OUT
ADJUSTABLE
GND 2
TOP VIEW
EN 3 (Not to Scale) 4 ADJ
Figure 5. 5-Lead TSOT (UJ-Suffix)
IN 1
5 OUT
ADP1711
GND 2 TOP VIEW
(Not to Scale)
EN 3
4 BYP
Figure 6. 5-Lead TSOT (UJ-Suffix)
Table 4. Pin Function Descriptions
ADP1710 ADP1710
Fixed
Adjustable ADP1711
Pin No. Pin No.
Pin No.
11
1
22
2
33
3
4
4
4
55
5
Mnemonic
IN
GND
EN
NC
ADJ
BYP
OUT
Description
Regulator Input Supply. Bypass IN to GND with a 1 μF or greater capacitor.
Ground.
Enable Input. Drive EN high to turn on the regulator; drive it low to turn off the
regulator. For automatic startup, connect EN to IN.
No Connect.
Adjust. A resistor divider from OUT to ADJ sets the output voltage.
Connect a 1 nF or greater capacitor (10 nF is recommended) between BYP and GND
to reduce the internal reference noise for low noise applications.
Regulated Output Voltage. Bypass OUT to GND with a 1 μF or greater capacitor.
Rev. 0 | Page 5 of 16
5 Page 
Current and thermal limit protections are intended to protect
the device against accidental overload conditions. For reliable
operation, device power dissipation must be externally limited
so junction temperatures do not exceed 125°C.
THERMAL CONSIDERATIONS
To guarantee reliable operation, the junction temperature of the
ADP1710/ADP1711 must not exceed 125°C. To ensure the
junction temperature stays below this maximum value, the user
needs to be aware of the parameters that contribute to junction
temperature changes. These parameters include ambient
temperature, power dissipation in the power device, and thermal
resistances between the junction and ambient air (θJA). The θJA
number is dependent on the package assembly compounds used
and the amount of copper to which the GND pins of the package
are soldered on the PCB. Table 5 shows typical θJA values of the
5lead TSOT package for various PCB copper sizes.
Table 5.
Copper Size (mm2)
01
50
100
300
500
1 Device soldered to minimum size pin traces.
θJA (°C/W)
170
152
146
134
131
The junction temperature of the ADP1710/ADP1711 can be
calculated from the following equation:
TJ = TA + (PD × θJA)
(2)
where:
TA is the ambient temperature.
PD is the power dissipation in the die, given by
PD = [(VIN – VOUT) × ILOAD] + (VIN × IGND)
(3)
where:
ILOAD is the load current.
IGND is the ground current.
VIN and VOUT are the input voltage and output voltage,
respectively.
Power dissipation due to ground current is quite small and can
be ignored. Therefore, the junction temperature equation
simplifies to the following:
TJ = TA + {[(VIN – VOUT) × ILOAD] × θJA}
(4)
As shown in Equation 4, for a given ambient temperature, input
to output voltage differential, and continuous load current,
there exists a minimum copper size requirement for the PCB to
ensure the junction temperature does not rise above 125°C. The
following figures show junction temperature calculations for
different ambient temperatures, load currents, VIN to VOUT
differentials, and areas of PCB copper.
ADP1710/ADP1711
140
MAX TJ (DO NOT OPERATE ABOVE THIS POINT)
120
100
80
60
40
20
0
0.5
1mA
10mA
30mA
80mA
100mA
150mA
125mA (LOAD CURRENT)
1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
VIN – VOUT (V)
Figure 23. 500 mm2 of PCB Copper, TA = 25°C
140
MAX TJ (DO NOT OPERATE ABOVE THIS POINT)
120
100
80
60
40
20
0
0.5
1mA
10mA
30mA
80mA
100mA
150mA
125mA (LOAD CURRENT)
1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
VIN – VOUT (V)
Figure 24. 100 mm2 of PCB Copper, TA = 25°C
140
MAX TJ (DO NOT OPERATE ABOVE THIS POINT)
120
100
80
60
40
20
0
0.5
1mA
10mA
30mA
80mA
100mA
150mA
125mA (LOAD CURRENT)
1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
VIN – VOUT (V)
Figure 25. 0 mm2 of PCB Copper, TA = 25°C
Rev. 0 | Page 11 of 16
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet ADP1711.PDF ] | |
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