Datasheet

ManualsBrandsANALOG DEVICES ManualsPMICsPMIC - LDO voltage regulator Positive, fixed TSOT 5

300 mA, Low Quiescent Current,

CMOS Linear Regulators

Data Sheet

ADP170/ADP171

Rev. C Document Feedback

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.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Technical Support www.analog.com

FEATURES

Maximum output current: 300 mA

Input voltage range: 1.6 V to 3.6 V

Low quiescent current

GND

= 23 µA with 0 mA load

GND

= 170 µA with 300 mA load

Low shutdown current: <1 µA

Low dropout voltage: 66 mV at 300 mA load

Output voltage accuracy: ±1%

Up to 31 fixed-output voltage options available from 0.8 V to

3.0 V

Adjustable-output voltage range

0.8 V to 3.0 V (ADP171)

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

OUT

= 0.8 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

TYPICAL APPLICATION CIRCUITS

07716-001

ADP170

OUT

C1 C2

VIN

GND

VOUT

OFF

Figure 1. ADP170 with Fixed Output Voltage, 1.8 V

07716-002

ADP171

= 2.3V

OUT

= 1.8V

1µF

OUT

1µF

VIN

GND

VOUT

ADJ

OFF

Figure 2. ADP171 with Adjustable Output Voltage

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 t o 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

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.

Summary of content (20 pages)

PAGE 1
300 mA, Low Quiescent Current, CMOS Linear Regulators ADP170/ADP171 Data Sheet TYPICAL APPLICATION CIRCUITS VIN 1 VIN 2 GND 3 EN C1 VOUT VOUT 5 C2 ADP170 ON OFF NC 4 Figure 1. ADP170 with Fixed Output Voltage, 1.8 V VIN = 2.3V 1 CIN 1µF VIN VOUT = 1.8V VOUT 5 COUT 1µF ADP171 2 GND 3 EN R1 ON OFF ADJ 4 R2 07716-002 Maximum output current: 300 mA Input voltage range: 1.6 V to 3.
PAGE 2
ADP170/ADP171 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Typical Performance Characteristics ..............................................7 Applications ....................................................................................... 1 Theory of Operation ...................................................................... 11 Typical Application Circuits................................................
PAGE 3
Data Sheet ADP170/ADP171 SPECIFICATIONS VIN = (VOUT + 0.4 V) or 1.6 V (whichever is greater), EN = VIN, IOUT = 10 mA, CIN = COUT = 1 µF, TA = 25°C, unless otherwise noted. Table 1.
PAGE 4
ADP170/ADP171 Data Sheet Parameter OUTPUT NOISE Symbol OUTNOISE POWER SUPPLY REJECTION RATIO PSRR Conditions 10 Hz to 100 kHz, VIN = 3.6 V, VOUT = 3.0 V 10 Hz to 100 kHz, VIN = 3.6 V, VOUT = 1.8 V 10 Hz to 100 kHz, VIN = 3.6 V, VOUT = 1.2 V 10 Hz to 100 kHz, VIN = 3.6 V, VOUT = 0.8 V 1 kHz, VIN = 3.6 V, IOUT = 10 mA, VOUT = 0.8 V 10 kHz, VIN = 3.6 V, IOUT = 10 mA, VOUT = 0.
PAGE 5
Data Sheet ADP170/ADP171 ABSOLUTE MAXIMUM RATINGS Table 3. Parameter VIN to GND VOUT to GND EN to GND Storage Temperature Range Operating Junction Temperature Range Operating Ambient Temperature Range Soldering Conditions Rating −0.3 V to +3.6 V −0.3 V to VIN −0.3 V to +3.6 V −65°C to +150°C −40°C to +125°C −40°C to +85°C JEDEC J-STD-020 Stresses above those listed under absolute maximum ratings may cause permanent damage to the device.
PAGE 6
ADP170/ADP171 Data Sheet PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS 5 VIN 1 VOUT ADP170 4 ADJ ADP171 GND 2 TOP VIEW (Not to Scale) EN 3 VOUT 4 EN 3 NC TOP VIEW (Not to Scale) 07716-003 GND 2 5 NC = NO CONNECT 07716-004 VIN 1 Figure 4. ADP171 5-Lead TSOT Figure 3. ADP170 5-Lead TSOT Table 5. Pin Function Descriptions Pin No. ADP170 ADP171 1 1 2 2 3 3 4 5 4 5 Mnemonic VIN GND EN NC ADJ VOUT Description Regulator Input Supply. Bypass VIN to GND with a 1 μF or greater capacitor.
PAGE 7
Data Sheet ADP170/ADP171 TYPICAL PERFORMANCE CHARACTERISTICS VIN = 3.6 V, VOUT = 1.8 V, IOUT = 10 mA, CIN = COUT = 1 μF, TA = 25°C, unless otherwise noted. 200 1.810 180 160 GROUND CURRENT (µA) 1.800 VOUT (V) 1.795 1.790 1.785 1.780 1.775 07716-005 ILOAD = 100µA ILOAD = 1mA ILOAD = 10mA ILOAD = 100mA ILOAD = 200mA ILOAD = 300mA 1.770 –40 –5 25 85 ILOAD = 300mA 140 120 ILOAD = 100mA 100 80 ILOAD = 10mA 60 ILOAD = 1mA 40 ILOAD = 100µA 20 07716-008 1.
PAGE 8
ADP170/ADP171 Data Sheet 400 5.0 3.0 2.5 2.0 1.5 300 250 200 150 100 1.0 0 –50 50 07716-011 0.5 –25 0 25 50 75 TEMPERATURE (°C) 100 0 1.5 125 1.6 1.8 1.7 1.9 2.0 Figure 14. Ground Current vs. Input Voltage (In Dropout) –30 70 TA = 25°C –40 50 300mA 200mA 100mA 10mA 1mA –50 PSSR (dB) DROPOUT VOLTAGE (mV) = 1mA = 10mA = 100mA = 200mA = 300mA VIN (V) Figure 11. Shutdown Current vs. Temperature at Various Input Voltages 60 ILOAD ILOAD ILOAD ILOAD ILOAD 07716-014 3.
PAGE 9
Data Sheet ADP170/ADP171 –30 70 –40 60 3V 50 –70 300mA 200mA 100mA 10mA 1mA 30 0.8V 20 –80 10 07716-017 –90 10 1.8V 40 100 1k 10k 100k 1M 0 0.001 10M 07716-020 –60 RMS NOISE (µV) PSSR (dB) –50 0.01 FREQUENCY (Hz) Figure 17. Power Supply Rejection Ratio vs. Frequency, VOUT = 3.0 V 0.1 1 10 LOAD CURRENT (mA) 100 1000 Figure 20. RMS Noise vs. Load Current and Output Voltage –30 –40 3V, 1mA 1.8V, 1mA 0.8V, 1mA 3V, 300mA 1.8V, 300mA 0.
PAGE 10
ADP170/ADP171 Data Sheet VIN VIN 2.6V TO 3.6V INPUT VOLTAGE STEP, 2V/µs 2.6V TO 3.6V INPUT VOLTAGE STEP 2V/µs 1 1 CH2 10.0mV M10.0µs A CH1 T 39.3000% VOUT = 1.8V CIN = COUT = 1µF 07716-123 VOUT = 1.8V CIN = COUT = 1µF CH1 1.00V VOUT 2 2.94V CH1 1.00V CH2 10.0mV B W M10.0µs T Figure 23. Line Transient Response, Load Current = 1 mA A CH1 39.3000µs 2.94V Figure 24. Line Transient Response, Load Current = 300 mA Rev.
PAGE 11
Data Sheet ADP170/ADP171 THEORY OF OPERATION The ADP170/ADP171 are low quiescent current, low-dropout linear regulators that operate from 1.6 V to 3.6 V and can provide up to 300 mA of output current. Drawing a low 170 µA of quiescent current (typical) at full load makes the ADP170/ADP171 ideal for battery-operated portable equipment. Shutdown current consumption is typically 100 nA. Optimized for use with small 1 µF ceramic capacitors, the ADP170/ADP171 provide excellent transient performance.
PAGE 12
ADP170/ADP171 Data Sheet APPLICATIONS INFORMATION CAPACITOR SELECTION Input Bypass Capacitor Output Capacitor Connecting a 1 μF capacitor from VIN to GND reduces the circuit sensitivity to the printed circuit board (PCB) layout, especially when long input traces or high source impedance are encountered. If greater than 1 μF of output capacitance is required, the input capacitor should be increased to match it.
PAGE 13
Data Sheet ADP170/ADP171 In this example, the worst-case temperature coefficient (TEMPCO) over −40°C to +85°C is assumed to be 15% for an X5R dielectric. The tolerance of the capacitor (TOL) is assumed to be 10%, and CBIAS is 0.94 μF at 1.8 V, as shown in Figure 29. The EN pin active/inactive thresholds are derived from the VIN voltage. Therefore, these thresholds vary with changing input voltage. Figure 31 shows typical EN active/inactive thresholds when the input voltage varies from 1.6 V to 3.6 V. 1.
PAGE 14
ADP170/ADP171 Data Sheet CURRENT LIMIT AND THERMAL OVERLOAD PROTECTION The junction temperature of the ADP170/ADP171 can be calculated from the following equation: where: TA is the ambient temperature. PD is the power dissipation in the die, given by PD = [(VIN − VOUT) × ILOAD] + (VIN × IGND) where: ILOAD is the load current. IGND is the ground current. VIN and VOUT are input and output voltages, respectively. Power dissipation due to ground current is quite small and can be ignored.
PAGE 15
Data Sheet ADP170/ADP171 140 140 TJ MAX TJ MAX 120 JUNCTION TEMPERATURE (°C) ILOAD = 300mA 100 80 ILOAD = 150mA 60 ILOAD = 100mA 40 ILOAD = 25mA ILOAD = 1mA 0 0.5 1.0 ILOAD = 10mA 1.5 2.0 2.5 ILOAD = 150mA 100 ILOAD = 100mA 80 ILOAD = 25mA 60 40 ILOAD = 1mA 0 0.5 3.0 1.0 1.5 Figure 35. 0 mm2 of PCB Copper, TA = 25°C ILOAD = 300mA ILOAD = 150mA 80 ILOAD = 100mA TJ = TB + (PD × ΨJB) ILOAD = 25mA 140 ILOAD = 10mA ILOAD = 1mA 120 07716-031 20 1.5 2.0 2.5 3.
PAGE 16
ADP170/ADP171 Data Sheet PRINTED CIRCUIT BOARD LAYOUT CONSIDERATIONS GND GND ANALOG DEVICES ADP171-x.x-EVALZ 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
Data Sheet ADP170/ADP171 OUTLINE DIMENSIONS 2.90 BSC 5 4 2.80 BSC 1.60 BSC 1 2 3 0.95 BSC 1.90 BSC *0.90 MAX 0.70 MIN 0.10 MAX 0.50 0.30 0.20 0.08 SEATING PLANE 8° 4° 0° 0.60 0.45 0.30 *COMPLIANT TO JEDEC STANDARDS MO-193-AB WITH THE EXCEPTION OF PACKAGE HEIGHT AND THICKNESS. 100708-A *1.00 MAX Figure 42. 5-Lead Thin Small Outline Transistor Package [TSOT] (UJ-5) Dimensions show in millimeters ORDERING GUIDE Model 1 ADP170AUJZ-1.2-R7 ADP170AUJZ-1.25-R7 ADP170AUJZ-1.5-R7 ADP170AUJZ-1.
PAGE 18
ADP170/ADP171 Data Sheet NOTES Rev.
PAGE 19
Data Sheet ADP170/ADP171 NOTES Rev.