ADP170 Analog Devices, Inc., ADP170 Datasheet

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ADP170

Manufacturer Part Number
ADP170
Description
300 Ma, Low Quiescent Current, Cmos Linear Regulators
Manufacturer
Analog Devices, Inc.
Datasheet

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FEATURES
Maximum output current: 300 mA
Input voltage range: 1.6 V to 3.6 V
Low quiescent current
Low shutdown current: <1 μA
Low dropout voltage: 66 mV at 300 mA load
Output voltage accuracy: ±1%
31 fixed-output voltage options: 0.8 V to 3.0 V
Adjustable-output voltage range
Accuracy over line, load, and temperature: ±3%
Stable with small 1 μF ceramic output capacitor
PSRR performance of 70 dB at 10 kHz and 73 dB at 1 kHz
Low noise: 30 μV rms at V
Current limit and thermal overload protection
Logic-controlled enable
Compact 5-lead TSOT package
APPLICATIONS
Mobile phones
Digital camera and audio devices
Portable and battery-powered equipment
DSP/FPGA/microprocessor supplies
Post dc-dc regulation
GENERAL DESCRIPTION
The ADP170/ADP171 are low voltage input, low quiescent
current, low-dropout (LDO) linear regulators that operate from
1.6 V to 3.6 V and provide up to 300 mA of output current. The
low 66 mV dropout voltage at 300 mA load improves efficiency
and allows operation over a wide input voltage range. The low
23 μA of quiescent current at a 0 mA load makes the ADP170/
ADP171 ideal for battery-operated portable equipment.
The ADP170 is capable of 31 fixed-output voltage options, ranging
from 0.8 V to 3.0 V. ADP171 is an adjustable version, which allows
output voltages that range from 0.8 V to 3.0 V via an external
divider. The ADP170/ADP171 are optimized for stable operation
with small 1 μF ceramic output capacitors. Ideal for powering
digital processors, the ADP170/ADP171 exhibit good transient
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.
Trademarks and registered trademarks are the property of their respective owners.
I
I
0.8 V to 3.0 V (ADP171)
GND
GND
= 23 μA with 0 mA load
= 170 μA with 300 mA load
OUT
= 0.8 V
300 mA, Low Quiescent Current,
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
performance and occupy minimal board space. Compared with
commodity types of LDOs, the ADP170/ADP171 provide 20 dB
to 40 dB better power supply rejection ratio (PSRR) at 100 kHz,
making the ADP170/ADP171 an ideal power source for analog-
to-digital converter (ADC) mixed-signal processor systems and
allowing use of smaller size bypass capacitors. In addition, low
output noise performance without the need for an additional
bypass capacitor further reduces printed circuit board (PCB)
component count.
Short-circuit protection and thermal overload protection circuits
prevent damage in adverse conditions. The ADP170/ADP171
are available in tiny 5-lead TSOT for the smallest footprint
solution to meet a variety of portable power applications.
V
NOTES
1. R1 AND R2 ARE EXTERNAL RESISTORS.
IN
1µF
C
= 2.3V
IN
TYPICAL APPLICATION CIRCUITS
Figure 1. ADP170 with Fixed Output Voltage, 1.8 V
V
Figure 2. ADP171 with Adjustable Output Voltage
CMOS Linear Regulators
IN
1µF
C
= 2.3V
J1
IN
J1
1
2
3
©2009 Analog Devices, Inc. All rights reserved.
1
2
3
VIN
GND
EN
ADP171
VIN
GND
EN
ADP170/ADP171
ADP170
VOUT
ADJ
VOUT
NC
5
4
5
4
V
V
OUT
OUT
R1
R2
= 0.5V(1 + R1/R2)
= 1.8V
C
1µF
www.analog.com
OUT
C
1µF
OUT

Related parts for ADP170

ADP170 Summary of contents

Page 1

... The low 23 μA of quiescent current load makes the ADP170/ ADP171 ideal for battery-operated portable equipment. The ADP170 is capable of 31 fixed-output voltage options, ranging from 0 ...

Page 2

... ADP170/ADP171 TABLE OF CONTENTS Features .............................................................................................. 1 Applications ....................................................................................... 1 Typical Application Circuits ............................................................ 1 General Description ......................................................................... 1 Revision History ............................................................................... 2 Specifications ..................................................................................... 3 Input and Output Capacitor, Recommended Specifications ........ 4 Absolute Maximum Ratings ............................................................ 5 Thermal Data ................................................................................ 5 Thermal Resistance ...................................................................... 5 ESD Caution .................................................................................. 5 Pin Configurations and Function Descriptions ........................... 6 REVISION HISTORY 1/09—Revision 0: Initial Version   Typical Performance Characteristics ..............................................7   ...

Page 3

... EN = VIN or GND −40°C to +125°C J UVLO UVLO T = −40°C to +125°C RISE J UVLO T = −40°C to +125°C FALL J UVLO HYS Rev Page ADP170/ADP171 = μ 25°C, unless otherwise noted. IN OUT A Min Typ 1 130 170 0.1 − 3.6 V −2 OUT + 0 ...

Page 4

... ADP170/ADP171 Parameter OUTPUT NOISE POWER SUPPLY REJECTION RATIO 1 The current from the external resistor divider network in the case of adjustable voltage output (as with the ADP171) should be subtracted from the ground current measured. 2 Accuracy when VOUT is connected directly to ADJ. When the VOUT voltage is set by external feedback resistors, the absolute accuracy in adjust mode depends on the tolerances of resistors used ...

Page 5

... THERMAL DATA Absolute maximum ratings apply only individually, not in combination. The ADP170/ADP171 can be damaged when the junction temperature limits are exceeded. Monitoring ambient temperature does not guarantee that T J temperature limits. In applications with high power dissipation and poor thermal resistance, the maximum ambient temperature may have to be derated ...

Page 6

... PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS VIN 1 5 ADP170 GND 2 TOP VIEW (Not to Scale CONNECT Figure 3. ADP170 5-Lead TSOT Table 5. Pin Function Descriptions Pin No. ADP170 ADP171 Mnemonic Description 1 1 VIN Regulator Input Supply. Bypass VIN to GND with a 1 μF or greater capacitor GND Ground ...

Page 7

... IN OUT A 85 125 100 1k 180 160 140 120 100 I = 200mA LOAD I = 300mA LOAD 3.1 3.3 3.5 Rev Page ADP170/ADP171 200 180 160 I = 300mA LOAD 140 120 I = 100mA LOAD 100 10mA LOAD 1mA LOAD 100µA ...

Page 8

... ADP170/ADP171 5 2. 2. 3. 3.5V 3 3.6V IN 2.5 2.0 1.5 1.0 0.5 0 –50 – TEMPERATURE (°C) Figure 11. Shutdown Current vs. Temperature at Various Input Voltages 25° 0 LOAD CURRENT (mA) Figure 12. Dropout Voltage vs. Load Current 1.85 1.80 1.75 1.70 1.65 1.60 1.55 1.50 1.55 1.60 1.65 1.70 1.75 V (V) IN Figure 13. Output Voltage vs. Input Voltage (in Dropout) ...

Page 9

... V Figure 20. RMS Noise vs. Load Current and Output Voltage OUT 10M CH1 Figure 21. Load Transient Response CH1 10k 100k Figure 22. Load Transient Response, C Rev Page ADP170/ADP171 3V 1.8V 0.8V 0.01 0 100 LOAD CURRENT (mA) I LOAD 1mA TO 300mA LOAD STEP, 2.5A/µs V OUT ...

Page 10

... ADP170/ADP171 V IN 2.6V TO 3.6V INPUT VOLTAGE STEP, 2V/µ OUT 2 CH1 1.00V CH2 10.0mV M10.0µs A CH1 T Figure 23. Line Transient Response, Load Current = 1.8V OUT 1µF IN OUT 2.94V 39.3000% Rev Page 2.6V TO 3.6V INPUT VOLTAGE STEP 2V/µ OUT 2 V OUT ...

Page 11

... Note that in shutdown, the output is turned off and the divider current is zero. The ADP170/ADP171 use the EN pin to enable and disable the ADJ VOUT pin under normal operating conditions. When EN is high, VOUT turns on; when EN is low, VOUT turns off. For automatic startup, EN can be tied to VIN ...

Page 12

... Input and Output Capacitor Properties Any good quality ceramic capacitor can be used with the ADP170/ADP171, as long as it meets the minimum capacitance and maximum ESR requirements. Ceramic capacitors are manu- factured with a variety of dielectrics, each with different behavior over temperature and applied voltage ...

Page 13

... ADP170/ADP171 inputs and the output behave in a predictable manner during power-up. ENABLE FEATURE The ADP170/ADP171 use the EN pin to enable and disable the VOUT pin under normal operating conditions. As shown in Figure 30, when a rising voltage on EN crosses the active threshold, VOUT turns on. When a falling voltage on EN crosses the inactive threshold, VOUT turns off ...

Page 14

... Consider the case where a hard short from VOUT to GND occurs. At first, the ADP170/ADP171 will limit the current so that only 450 mA is conducted into the short. If self-heating of the junction is great enough to cause its temperature to rise above 150°C, thermal shutdown will activate, turning off the output and reducing the output current to 0 ...

Page 15

... J dissipation (P = 100mA The typical value of Ψ 140 120 100 2.5 3 0.4 = 100mA = 10mA 2.5 3.0 Rev Page ADP170/ADP171 T MAX J = 300mA I = 150mA LOAD I = 100mA LOAD I = 25mA LOAD I = 1mA I = 10mA LOAD LOAD 1.0 1.5 2.0 2.5 V – V (V) OUT ...

Page 16

... CONSIDERATIONS Heat dissipation from the package can be improved by increasing the amount of copper attached to the pins of the ADP170/ADP171. However, as can be seen from Table 6, a point of diminishing returns is eventually reached, beyond which an increase in the copper size does not yield significant heat dissipation benefits. ...

Page 17

... ADP170AUJZ-2.5-R7 –40°C to +125°C 2 ADP170AUJZ-2.8-R7 –40°C to +125°C 2 ADP171AUJZ-R7 –40°C to +125°C 2 ADP170-1.8-EVALZ ADP171-EVALZ 2 1 For additional voltage options, contact your local Analog Devices, Inc., sales or distribution representative RoHS Compliant Part. 2.90 BSC 5 4 2.80 BSC 1 ...

Page 18

... ADP170/ADP171 NOTES Rev Page ...

Page 19

... NOTES Rev Page ADP170/ADP171 ...

Page 20

... ADP170/ADP171 NOTES ©2009 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D07716-0-1/09(0) Rev Page ...

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