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Dual, 300 mA Output, Low Noise,

High PSRR Voltage Regulators

Data Sheet

ADP222/ADP223/ADP224/ADP225

Rev. D Document Feedback

Infor

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FEATURES

Input voltage range: 2.5 V to 5.5 V

Small, 8-lead, 2 mm × 2 mm LFCSP package

Initial accuracy: ±1%

High PSRR: 70 dB at 10 kHz, 60 dB at 100 kHz, 40 dB at 1 MHz

Low noise: 27 µV rms at V

OUT

= 1.2 V, 50 µV rms at V

OUT

= 2.8 V

Excellent transient response

Low dropout voltage: 170 mV at 300 mA load

65 µA typical ground current at no load, both LDOs enabled

Fixed output voltage from 0.8 V to 3.3 V (ADP222/ADP224)

Adjustable output voltage range from 0.5 V to 5.0 V

(ADP223/ADP225)

Quick output discharge (QOD)—ADP224/ADP225

Overcurrent and thermal protection

APPLICATIONS

Portable and battery-powered equipment

Portable medical devices

Post dc-to-dc regulation

Point of sale terminals

Credit card readers

Automatic meter readers

Wireless network equipment

TYPICAL APPLICATION CIRCUITS

EN1

VOUT1

VIN

EN2

GND

ADJ2

VOUT2

ADJ1

ADP223/

ADP225

OFF

= 4.2V

1µ

VOUT1 = 2.8V

VOUT2 = 2.0V

09376-001

Figure 1. ADP223/ADP225

EN1

VOUT1

VIN

EN2

GND

SENSE2 VOUT2

1 8

SENSE1

ADP222/

ADP224

OFF

= 4.2V

1µF

VOUT2 = 3.3V

VOUT1 = 1.5V

09376-101

Figure 2. ADP222/ADP224

GENERAL DESCRIPTION

The 300 mA, adjustable dual output ADP223/ADP225 and

fixed dual output ADP222/ADP224 combine high PSRR, low

noise, low quiescent current, and low dropout voltage in a

voltage regulator that is ideally suited for wireless applications

with demanding performance and board space requirements.

The ADP222/ADP224 are available with fixed outputs voltages

from 0.8V to 3.3V. The adjustable output ADP223/ADP225 may

be set to output voltages from 0.5 V to 5.0 V. The low quiescent

current, low dropout voltage, and wide input voltage range of

the ADP222/ADP223/ADP224/ADP225 extend the battery life

of portable devices.

The ADP222/ADP223/ADP224/ADP225 maintain power

supply rejection greater than 60 dB for frequencies as high as

100 kHz while operating with a low headroom voltage. The

ADP222/ADP223/ADP224/ADP225 offer much lower noise

performance than competing LDOs without the need for a

noise bypass capacitor. Overcurrent and thermal protection

circuitry prevent damage in adverse conditions.

The ADP224 and ADP225 are identical to the ADP222 and

ADP223, respectively, but with the addition of a quick output

discharge (QOD) feature.

The ADP222/ADP223/ADP224/ADP225 are available in a

small 8-lead, 2 mm × 2 mm LFCSP package and are stable with

tiny 1 µF, ±30% ceramic output capacitors, resulting in the smallest

possible board area for a wide variety of portable power needs.

Summary of content (24 pages)

PAGE 1
Dual, 300 mA Output, Low Noise, High PSRR Voltage Regulators ADP222/ADP223/ADP224/ADP225 Data Sheet FEATURES TYPICAL APPLICATION CIRCUITS VIN = 4.2V + C1 1µF OFF R2 ON R1 ADJ1 8 1 EN1 OFF ON 2 EN2 ADP223/ ADP225 VOUT2 = 2.0V VOUT1 7 3 GND + C2 1µF VIN 6 VOUT1 = 2.8V 4 ADJ2 VOUT2 5 R3 + C3 1µF 09376-001 Input voltage range: 2.5 V to 5.
PAGE 2
ADP222/ADP223/ADP224/ADP225 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Typical Performance Characteristics ..............................................7 Applications ....................................................................................... 1 Theory of Operation ...................................................................... 17 Typical Application Circuits..................................
PAGE 3
Data Sheet ADP222/ADP223/ADP224/ADP225 SPECIFICATIONS VIN = (VOUT + 0.5 V) or 2.5 V (whichever is greater), EN1 = EN2 = VIN, IOUT1 = IOUT2 = 10 mA, CIN = COUT1 = COUT2 = 1 µF, TA = 25°C, unless otherwise noted. Table 1.
PAGE 4
ADP222/ADP223/ADP224/ADP225 Parameter OUTPUT NOISE Symbol OUTNOISE POWER SUPPLY REJECTION RATIO PSRR Data Sheet Test Conditions/Comments 10 Hz to 100 kHz, VIN = 5 V, VOUT = 3.3 V 10 Hz to 100 kHz, VIN = 5 V, VOUT = 2.8 V 10 Hz to 100 kHz, VIN = 3.6 V, VOUT = 2.5 V 10 Hz to 100 kHz, VIN = 3.6 V, VOUT = 1.2 V VIN = 2.5 V, VOUT = 0.8 V, IOUT = 100 mA 100 Hz 1 kHz 10 kHz 100 kHz 1 MHz VIN = 3.8 V, VOUT = 2.
PAGE 5
Data Sheet ADP222/ADP223/ADP224/ADP225 ABSOLUTE MAXIMUM RATINGS Table 3. Parameter VIN to GND ADJ1, ADJ2, VOUT1, VOUT2 to GND EN1, EN2 to GND Storage Temperature Range Operating Junction Temperature Range Soldering Conditions Rating −0.3 V to +6 V −0.3 V to VIN −0.3 V to +6 V −65°C to +150°C −40°C to +125°C JEDEC J-STD-020 Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device.
PAGE 6
ADP222/ADP223/ADP224/ADP225 Data Sheet PIN CONFIGURATION AND FUNCTION DESCRIPTIONS ADP222/ ADP224 EN1 SENSE1 8 1 EN1 ADJ1 8 2 EN2 VOUT1 7 2 EN2 VOUT1 7 3 GND VIN 6 3 GND VIN 6 4 SENSE2 VOUT2 5 4 ADJ2 VOUT2 5 NOTES 1. CONNECT EXPOSED PAD TO GND. 09376-102 1 NOTES 1. CONNECT EXPOSED PAD TO GND. Figure 3. ADP222/ADP224 Pin Configuration 09376-002 ADP223/ ADP225 Figure 4. ADP223/ADP225 Pin Configuration Table 5. Pin Function Descriptions Pin No.
PAGE 7
Data Sheet ADP222/ADP223/ADP224/ADP225 TYPICAL PERFORMANCE CHARACTERISTICS VIN = 5 V, VOUT1 = 3.3 V, VOUT2 = 2.8 V, IOUT1 = IOUT2 = 1 mA, CIN = COUT = 1 µF, TA = 25°C, unless otherwise noted. 1.220 3.40 LOAD = 100µA LOAD = 1mA LOAD = 10mA LOAD = 50mA LOAD = 100mA LOAD = 300mA 3.38 3.36 1.210 1.205 3.32 VOUT (V) 3.30 3.28 1.200 1.195 LOAD = 10µA LOAD = 100µA LOAD = 1mA LOAD = 10mA LOAD = 100mA LOAD = 300mA 3.26 1.190 3.24 1.185 3.22 –5 25 85 125 JUNCTION TEMPERATURE (°C) 1.180 3.
PAGE 8
ADP222/ADP223/ADP224/ADP225 Data Sheet 1.820 2.85 2.84 1.815 2.83 1.810 2.82 VOUT (V) 1.800 2.81 2.80 2.79 2.78 1.790 2.77 1.785 2.76 0.1 1 100 10 1000 ILOAD (mA) Figure 11. Output Voltage vs. Load Current, VOUTx = 1.8 V, ADP222/ADP224 1.215 1.815 1.210 1.810 1.205 1.805 VOUT (V) 1.820 1.795 1.190 1.790 1.185 1.785 0.1 1 100 10 1000 ILOAD (mA) Figure 12. Output Voltage vs. Load Current, VOUTx = 1.2 V, ADP222/ADP224 4.3 4.5 4.7 4.9 5.1 5.3 5.5 1.800 1.195 1.
PAGE 9
Data Sheet ADP222/ADP223/ADP224/ADP225 140 250 120 GROUND CURRENT (µA) 80 60 LOAD = 10µA LOAD = 100µA LOAD = 1mA LOAD = 10mA LOAD = 100mA LOAD = 300mA 20 –40 85 25 –5 50 0 0.01 09376-117 0 125 JUNCTION TEMPERATURE (°C) 1 10 100 1000 Figure 20. Ground Current vs. Load Current, Dual Output, ADP222/ADP224 300 140 LOAD = 100µA LOAD = 1mA LOAD = 10mA LOAD = 50mA LOAD = 100mA LOAD = 300mA 120 GROUND CURRENT (µA) GROUND CURRENT (µA) 0.1 ILOAD (mA) Figure 17. Ground Current vs.
PAGE 10
ADP222/ADP223/ADP224/ADP225 Data Sheet 1.220 3.40 3.38 1.215 3.36 1.210 1.205 3.32 VOUT (V) VOUT (V) 3.34 3.30 3.28 1.200 1.195 3.26 1.185 1.180 –40 –5 25 85 09376-003 3.20 125 JUNCTION TEMPERATURE (°C) –5 25 85 125 JUNCTION TEMPERATURE (°C) Figure 26. Output Voltage vs. Junction Temperature, VOUTx = 1.2 V, ADP223/ADP225 Figure 23. Output Voltage vs. Junction Temperature, VOUTx = 3.3 V, ADP223/ADP225 2.85 3.40 2.84 3.38 2.83 3.36 2.82 3.34 2.81 3.32 VOUT (V) 2.80 3.
PAGE 11
Data Sheet ADP222/ADP223/ADP224/ADP225 2.85 1.820 2.84 1.815 2.83 1.810 2.82 VOUT (V) VOUT (V) 1.805 1.800 1.795 2.81 2.80 2.79 2.78 1.790 1.785 2.76 10 100 1000 ILOAD (mA) Figure 29. Output Voltage vs. Load Current, VOUTx = 1.8 V, ADP223/ADP225 1.215 1.815 1.210 1.810 1.205 1.805 VOUT (V) 1.820 1.795 1.190 1.790 1.185 1.785 1 10 100 1000 ILOAD (mA) Figure 30. Output Voltage vs. Load Current, VOUTx = 1.2 V, ADP223/ADP225 4.10 4.30 4.70 4.90 5.10 5.30 5.50 1.800 1.
PAGE 12
ADP222/ADP223/ADP224/ADP225 Data Sheet 300 500 450 GROUND CURRENT (µA) 400 200 150 100 LOAD = 100µA LOAD = 1mA LOAD = 10mA LOAD = 50mA LOAD = 100mA LOAD = 300mA 0 –40 –5 25 85 125 JUNCTION TEMPERATURE (°C) 350 300 250 200 150 100 50 0 0.01 1 0.1 10 100 1000 ILOAD (mA) Figure 35. Ground Current vs. Junction Temperature, Single Output, Includes 100 µA for Output Divider, ADP223/ADP225 09376-018 50 09376-015 GROUND CURRENT (uA) 250 Figure 38. Ground Current vs.
PAGE 13
Data Sheet ADP222/ADP223/ADP224/ADP225 140 2.90 2.85 120 100 2.75 VOUT (V) 80 60 2.70 2.65 2.60 2.55 LOAD = 1mA LOAD = 5mA LOAD = 10mA LOAD = 50mA LOAD = 100mA LOAD = 300mA 2.50 20 2.45 1 10 100 1000 ILOAD (mA) 2.40 2.6 09376-021 0 2.8 2.9 3.1 3.0 VIN (V) Figure 44. Output Voltage vs. Input Voltage in Dropout, VOUTx = 2.8 V Figure 41. Dropout Voltage vs. Load Current, VOUT = 3.3 V 450 160 400 140 350 120 GROUND CURRENT (µA) DROPOUT VOLTAGE (mV) 2.
PAGE 14
ADP222/ADP223/ADP224/ADP225 –30 –40 –40 –50 –60 –50 –60 –70 –70 –80 –80 –90 –90 –100 –100 10 10 100 1k 10k 100k 1M 10M FREQUENCY (Hz) 0 –40 PSRR (dB) –30 –40 –50 –60 –70 –80 –90 –90 10k 100k 1M 10M FREQUENCY (Hz) –100 10 –40 –40 PSRR (dB) –30 –50 –60 –70 –80 –90 –90 10k 100k 1M FREQUENCY (Hz) 100k 1M 10M 10M Figure 49. Power Supply Rejection Ratio vs. Frequency, VIN = 2.8 V, VOUTx = 1.
PAGE 15
Data Sheet ADP222/ADP223/ADP224/ADP225 0 –10 –20 VRIPPLE = 50mV VIN = 2.5V VOUT = 1.8V COUT = 1µF VIN PSRR (dB) –30 –40 VOUT1 2 –50 –60 VOUT2 –70 3 –80 LOAD = 1mA LOAD = 10mA LOAD = 100mA LOAD = 300mA 100 10k 1k 100k 1M 10M FREQUENCY (Hz) CH1 1V CH3 10mV B W VIN VOUT2 1 CH2 10mV B W W M1µs A CH4 T 10.40% 200mV 09376-034 1 W 200mV VOUT2 3 B M1µs A CH4 T 9.8% VOUT1 2 3 B W VIN VOUT1 CH1 1V CH3 10mV B W Figure 56. Transient Line Response, VOUTx = 3.3 V and 2.
PAGE 16
ADP222/ADP223/ADP224/ADP225 Data Sheet 10 1 2 VOUT1 VOUT2 3 B W CH2 50mV B W B W M10µs A CH1 T 10.20% 200mA 60 40 30 20 1.2V 1.8V 2.8V 3.3V 0.1 1 10 100 1000 ILOAD (mA) 09376-040 NOISE (µV rms) 50 0.01 100 1k 10k 100k Figure 61. Output Noise Spectral Density, VIN = 5 V, ILOAD = 10 mA, COUT = 1 μF 70 0 0.001 0.1 FREQUENCY (Hz) Figure 59. Transient Load Response, VOUTx = 1.2 V, ILOAD = 1 mA to 300 mA; VOUTx = 1.8 V, ILOAD = 1 mA 10 1 0.
PAGE 17
Data Sheet ADP222/ADP223/ADP224/ADP225 THEORY OF OPERATION 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 flow and increasing the output voltage.
PAGE 18
ADP222/ADP223/ADP224/ADP225 Data Sheet APPLICATIONS INFORMATION Output Capacitor The ADP222/ADP223/ADP224/ADP225 are designed for operation with small, space-saving ceramic capacitors but function with most commonly used capacitors as long as care is taken with regard to the effective series resistance (ESR) value. The ESR of the output capacitor affects the stability of the LDO control loop. A minimum of 0.
PAGE 19
Data Sheet ADP222/ADP223/ADP224/ADP225 3.5 1.4 VIN = 5.5V OUTPUT VOLTAGE (V) 1.2 3.0 OUTPUT VOLTAGE (V) The ADP222/ADP223/ADP224/ADP225 use the ENx pins to enable and disable the VOUTx pins under normal operating conditions. Figure 67 shows a rising voltage on ENx crossing the active threshold, where VOUTx turns on. When a falling voltage on ENx crosses the inactive threshold, VOUTx turns off. ENx 3.3V 2.8V 1.8V 1.2V 2.5 2.0 1.5 1.0 1.0 0.5 0.
PAGE 20
ADP222/ADP223/ADP224/ADP225 Data Sheet THERMAL CONSIDERATIONS 4.0 In most applications, the ADP222/ADP223/ADP224/ADP225 do not dissipate much heat due to its high efficiency. However, in applications with high ambient temperature, and high supply voltage to output voltage differential, the heat dissipated in the package is large enough that it can cause the junction temperature of the die to exceed the maximum junction temperature of 125°C. 3.5 ENABLE VOUT, NO QOD VOUT, WITH QOD VOLTS (V) 3.0 2.5 2.
PAGE 21
Data Sheet ADP222/ADP223/ADP224/ADP225 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. 80 60 6400mm 2 1000mm 2 500mm 2 100mm 2 25mm 2 JEDEC TJ MAX 40 20 0 Power dissipation due to ground current is quite small and can be ignored.
PAGE 22
ADP222/ADP223/ADP224/ADP225 Data Sheet PRINTED CIRCUIT BOARD LAYOUT CONSIDERATIONS GND Heat dissipation from the package can be improved by increasing the amount of copper attached to the pins of the ADP222/ADP223/ADP224/ADP225. However, as listed in 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 23
Data Sheet ADP222/ADP223/ADP224/ADP225 OUTLINE DIMENSIONS 1.70 1.60 1.50 2.00 BSC SQ 0.50 BSC 8 5 PIN 1 INDEX AREA 1.10 1.00 0.90 EXPOSED PAD 0.425 0.350 0.275 1 4 TOP VIEW BOTTOM VIEW 0.60 0.55 0.50 07-11-2011-B 0.30 0.25 0.20 PIN 1 INDICATOR (R 0.15) FOR PROPER CONNECTION OF THE EXPOSED PAD, REFER TO THE PIN CONFIGURATION AND FUNCTION DESCRIPTIONS SECTION OF THIS DATA SHEET. 0.05 MAX 0.02 NOM SEATING PLANE 0.175 REF 0.20 REF Figure 77.
PAGE 24
ADP222/ADP223/ADP224/ADP225 Data Sheet Model ADP225ACPZ-R7 Temperature Range −40°C to +125°C Output Voltage (V) VOUT1 VOUT2 Adjustable Adjustable ADP223ACPZ-R7 −40°C to +125°C Adjustable Adjustable Adjustable Adjustable Adjustable Adjustable 1 ADP223CP-EVALZ ADP225CP-EVALZ 1 Package Description 8-Lead Lead Frame Chip Scale Package [LFCSP_UD] 8-Lead Lead Frame Chip Scale Package [LFCSP_UD] Evaluation Board Evaluation Board Z = RoHS Compliant Part. ©2011–2013 Analog Devices, Inc.