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ADP162 Schematic ( PDF Datasheet ) - Analog Devices

Teilenummer ADP162
Beschreibung CMOS Linear Regulators
Hersteller Analog Devices
Logo Analog Devices Logo 




Gesamt 24 Seiten
ADP162 Datasheet, Funktion
Data Sheet
Ultralow Quiescent Current,
150 mA, CMOS Linear Regulators
ADP160/ADP161/ADP162/ADP163
FEATURES
Ultralow quiescent current
IQ = 560 nA with 0 µA load
IQ = 860 nA with 1 µA load
Stable with 1 µF ceramic input and output capacitors
Maximum output current: 150 mA
Input voltage range: 2.2 V to 5.5 V
Low shutdown current: <50 nA typical
Low dropout voltage: 195 mV at 150 mA load
Initial accuracy: ±1%
Accuracy over line, load, and temperature: ±3.5%
15 fixed output voltage options: 1.2 V to 4.2 V
Adjustable output available
PSRR performance of 72 dB at 100 Hz
Current limit and thermal overload protection
Logic-control enable
Integrated output discharge resistor
5-lead TSOT package
4-ball, 0.5 mm pitch WLCSP
APPLICATIONS
Mobile phones
Digital cameras and audio devices
Portable and battery-powered equipment
Post dc-to-dc regulation
Portable medical devices
TYPICAL APPLICATION CIRCUITS
VIN = 2.3V
1µF
ADP160/ADP162
VOUT = 1.8V
1 VIN VOUT 5
2 GND
1µF
ON
OFF
3 EN
NC 4
NC = NO CONNECT
Figure 1. 5-Lead TSOT ADP160/ADP162 with Fixed Output Voltage, 1.8 V
VIN = 4.2V
1µF
ON
OFF
ADP161/ADP163
VOUT = 3.2V
1 VIN VOUT 5
2 GND
1µF
R1
3 EN
ADJ 4
R2
Figure 2. 5-Lead TSOT ADP161/ADP163 with Adjustable Output Voltage, 3.2 V
VIN = 3.3V
1µF
ON
OFF
ADP160/ADP162
12
VOUT = 2.8V
A VIN
VOUT
TOP VIEW
1µF
(Not to Scale)
B EN
GND
Figure 3. 4-Ball WLCSP ADP160/ADP162 with Fixed Output Voltage, 2.8 V
GENERAL DESCRIPTION
The ADP160/ADP161/ADP162/ADP163 are ultralow quiescent
current, low dropout, linear regulators that operate from 2.2 V
to 5.5 V and provide up to 150 mA of output current. The low
195 mV dropout voltage at 150 mA load improves efficiency and
allows operation over a wide input voltage range.
The ADP16x are specifically designed for stable operation with a
tiny 1 µF ± 30% ceramic input and output capacitors to meet
the requirements of high performance, space-constrained
applications.
The ADP160 is available in 15 fixed output voltage options,
ranging from 1.2 V to 4.2 V. The ADP160/ADP161 also include
a switched resistor to discharge the output automatically when
the LDO is disabled. The ADP162 is identical to the ADP160
but does not include the output discharge function.
The ADP161 and ADP163 are available as adjustable output voltage
regulators. They are only available in a 5-lead TSOT package.
The ADP163 is identical to the ADP161 but does not include
the output discharge function.
Short-circuit and thermal overload protection circuits prevent
damage in adverse conditions. The ADP160 and ADP162 are
available in a tiny 5-lead TSOT and a 4-ball, 0.5 mm pitch
WLCSP package for the smallest footprint solution to meet a
variety of portable power applications.
Rev. H
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Tel: 781.329.4700 ©2010–2013 Analog Devices, Inc. All rights reserved.
Technical Support
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ADP162 Datasheet, Funktion
ADP160/ADP161/ADP162/ADP163
PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS
Data Sheet
VIN 1 ADP160/ 5 VOUT
ADP162
GND 2 TOP VIEW
(Not to Scale)
EN 3
4 NC
NC = NO CONNECT
Figure 4. 5-Lead TSOT, Fixed Output Pin Configuration, ADP160/ADP162
Table 5. 5-Lead TSOT Pin Function Descriptions, ADP160/ADP162
Pin No. Mnemonic Description
1 VIN
Regulator Input Supply. Bypass VIN to GND with a 1 μF or greater capacitor.
2 GND
Ground.
3 EN
Enable Input. Drive EN high to turn on the regulator; drive EN low to turn off the regulator. For automatic startup,
connect EN to VIN.
4 NC
No Connect. This pin is not connected internally. Connect this pin to GND or leave open.
5 VOUT Regulated Output Voltage. Bypass VOUT to GND with a 1 μF or greater capacitor.
VIN 1 ADP161/ 5 VOUT
ADP163
GND 2 TOP VIEW
(Not to Scale)
EN 3
4 ADJ
Figure 5. 5-Lead TSOT, Adjustable Output Pin Configuration, ADP161/ADP163
Table 6. 5-Lead TSOT Pin Function Descriptions, ADP161/ADP163
Pin No. Mnemonic Description
1 VIN
Regulator Input Supply. Bypass VIN to GND with a 1 μF or greater capacitor.
2 GND
Ground.
3 EN
Enable Input. Drive EN high to turn on the regulator; drive EN low to turn off the regulator. For automatic startup,
connect EN to VIN.
4 ADJ
Output Voltage Adjust Pin. Connect the midpoint of the voltage divider between VOUT and GND to this pin to set
the output voltage.
5 VOUT Regulated Output Voltage. Bypass VOUT to GND with a 1 μF or greater capacitor.
Rev. H | Page 6 of 24

6 Page









ADP162 pdf, datenblatt
ADP160/ADP161/ADP162/ADP163
THEORY OF OPERATION
The ADP16x are ultralow quiescent current, low dropout linear
regulators that operate from 2.2 V to 5.5 V and can provide up to
150 mA of output current. Drawing only 560 nA (typical) at no
load and a low 42 µA of quiescent current (typical) at full load
makes the ADP16x ideal for battery-operated portable equip-
ment. Shutdown current consumption is typically 50 nA.
Using new innovative design techniques, the ADP16x provide
ultralow quiescent current and superior transient performance
for digital and RF applications. The ADP16x are also optimized
for use with small 1 µF ceramic capacitors.
VIN VOUT
GND
SHORT CIRCUIT,
UVLO, AND
THERMAL
PROTECT
R1 R3
EN SHUTDOWN
REFERENCE
R2
ADP160
Figure 30. Internal Block Diagram, Fixed Output with Output Discharge Function
VIN VOUT
GND
EN
SHORT CIRCUIT,
UVLO, AND
THERMAL
PROTECT
SHUTDOWN
REFERENCE
R1
ADJ
ADP161
Figure 31. Internal Block Diagram, Adjustable Output with Output Discharge
Function
VIN VOUT
GND
SHORT CIRCUIT,
UVLO, AND
THERMAL
PROTECT
R1
EN SHUTDOWN
REFERENCE
R2
ADP162
Figure 32. Internal Block Diagram, Fixed Output without Output Discharge
Function
Data Sheet
VIN VOUT
GND
EN
SHORT CIRCUIT,
UVLO, AND
THERMAL
PROTECT
SHUTDOWN
REFERENCE
ADJ
ADP163
Figure 33. Internal Block Diagram, Adjustable Output without Output
Discharge Function
Internally, the ADP16x consists of a reference, an error amplifier, a
feedback voltage divider, and a PMOS pass transistor. Output
current is delivered via the PMOS pass device, which is controlled
by the error amplifier. The error amplifier compares the reference
voltage with the feedback voltage from the output and amplifies
the difference. If the feedback voltage is lower than the reference
voltage, the gate of the PMOS device is pulled lower, allowing
more current to pass and increasing the output voltage. If the
feedback voltage is higher than the reference voltage, the gate
of the PMOS device is pulled higher, allowing less current to pass
and decreasing the output voltage.
The adjustable ADP161/ADP163 have an output voltage range
of 1.0 V to 4.2 V. The output voltage is set by the ratio of two
external resistors, as shown in Figure 2. The device servos the
output to maintain the voltage at the ADJ pin at 1.0 V refe-
renced to ground. The current in R1 is then equal to 1.0 V/R2,
and the current in R1 is the current in R2 plus the ADJ pin bias
current. The ADJ pin bias current, 10 nA at 25°C, flows through
R1 into the ADJ pin.
The output voltage can be calculated using the equation:
VOUT = 1.0 V(1 + R1/R2) + (ADJI-BIAS)(R1)
The value of R1 should be less than 200 kΩ to minimize errors in
the output voltage caused by the ADJ pin bias current. For example,
when R1 and R2 each equal 200 kΩ, the output voltage is 2.0 V.
The output voltage error introduced by the ADJ pin bias current
is 2 mV or 0.05%, assuming a typical ADJ pin bias current of
10 nA at 25°C.
Rev. H | Page 12 of 24

12 Page





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