ADPL42002_V01 AD | Alldatasheet
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Technical content
20V, 200mA, Low Noise, CMOS LDO Linear Regulator Rev. 1 DOCUMENT FEEDBACK TECHNICAL SUPPORT © 2025 A n a l o g D e v i c e s , I n c . A l l r i g h t s r e s e r v e d .
FEATURES
Low Noise: 20µVRMS Independent of Fixed Output Voltage PSRR of 78dB at 10kHz, VOUT ≤ 5V, VIN = 7V Input Voltage Range: 2.7V to 20V Maximum Output Current: 200mA Initial Accuracy: ±1% Accuracy Over Line, Load, and Temperature Low Dropout Voltage: 220mV (typical) at a 200mA Load, VOUT = 5V User Programmable Soft Start Low Quiescent Current, IGND = 80μA (typical) with no Load Low Shutdown Current: 1.8μA at VIN = 5V, 3.0μA at VIN = 20V Stable with a Small 2.2µF Ceramic Output Capacitor Fixed Output Voltage Options: 1.8V, 2.5V, 3.3V, and 5V Adjustable Output from 1.2V to VIN – VDO, Output can be Adjusted Above Initial Set Point Precision Enable 6-Lead LFCSP (2mm x 2mm), 8-Lead SOIC
APPLICATIONS
Regulation to Noise Sensitive Applications ADC and DAC Circuits, Precision Amplifiers, Power for VCO VTUNE Control Communications and Infrastructure Medical and Healthcare Industrial and Instrumentation GENERAL DESCRIPTION The ADPL42002 is a CMOS, low dropout (LDO) linear regulator that operates from 2.7V to 20V and provides up to 200mA of output current. This high input voltage LDO is ideal for the regulation of high -performance analog and mixed -signal circuits operating fr om 19V down to 1.2V rails. Using an advanced proprietary architecture, the device provides high power supply rejection, low noise, and achieves excellent line and load transient response with a small 2.2µF ceramic output capacitor. The ADPL42002 regulator output noise is 20 μVRMS independent of the output voltage for the fixed options of 5V or less. The ADPL42002 is available in four fixed output voltage options. The following voltages are available from Each fixed output voltage can be adjusted above the initial set point with an external feedback divider. This allows the ADPL42002 to provide an output voltage from 1.2V to VIN − VDO with high PSRR and low noise. User programmable soft start with an external capacitor is available. The ADPL42002 is available in a 6 -lead, 2mm x 2mm LFCSP, making it not only a very compact solution, but it also provides excellent thermal performance for applications requiring up to 200mA of output current in a small, low -profile footprint. The ADPL4200 2 is also available in an 8-lead SOIC. TYPICAL APPLICATION CIRCUITS Figure 1. ADPL42002 with Fixed Output Voltage, 5V Figure 2. ADPL42002 with 5V Output Adjusted to 6V
analog.com Rev. 1 2 of 22 TABLE OF CONTENTS
analog.com Rev. 1 3 of 22
REVISION HISTORY
0 1/25 Initial release — 1 3/25 Updated Initial Accuracy to ±1% in the Features section Updated Capacitor ESR’s Min value to 0.001 in Table 2 Updated Quiescent Current’s value to 240μF in Theory of Operation section Removed Table 6 link from PCB Layout Considerations section
Table 1. Electrical Characteristics
performance for loads less than 1mA. nominal output voltage. Dropout applies only for output voltages above 2.7V. 3 Start-up time is defined as the time between the rising edge of EN to OUT being at 90% of the nominal value. output voltage to drop to 90% of 5.0V or 4.5V. Table 2. Electrical Characteristics recommended, while Y5V and Z5U capacitors are not recommended for use with any LDO.
Table 3. Absolute Maximum Ratings extended periods may affect product reliability. ambient temperature may have to be derated. dissipation (PD) of the device, and the junction-to-ambient thermal resistance of the package (θJA).
Maximum TJ is calculated from the TA and PD using the formula. JESD51-9 for detailed information on the board construction. calculated from the board temperature (TB) and PD using the formula. Table 4. Thermal Resistance
Figure 3. 6-Lead LFCSP Pin Configuration Figure 4. 8-Lead SOIC Pin Configuration Table 5. Pin Descriptions set the output voltage higher than the fixed output voltage (ADJ). ground this pin. 400µs is a typical soft-start time in the rest of DS. 6 7, 8 VIN Regulator Input Supply. Bypass VIN to GND with a 2.2µF or greater capacitor.
6 VIN
- EXPOSED PAD. THE EXPOSED PAD ON THE BOTTOM OF
PAD CONNECT TO THE GROUND PLANE ON THE BOARD.
- EXPOSED PAD. THE EXPOSED PAD ON THE BOTTOM OF
PAD CONNECT TO THE GROUND PLANE ON THE BOARD.
for portable equipment. Typical shutdown current consumption is less than 3µA at room temperature. Optimized for use with small 2.2µF ceramic capacitors, the ADPL42002 provides excellent transient performance. device is pulled higher, allowing less current to pass and decreasing the output voltage. where R1 and R2 are the resistors in the output voltage divider shown in Figure 26. To set the output voltage of the adjustable ADPL42002, replace 5V in Equation 3 with 1.2V. Figure 26. Typical Adjustable Output Voltage Application Schematic or 0.04%, assuming a typical SENSE/ADJ pin input current of 10nA at 25°C. high, VOUT turns on, and when EN is low, VOUT turns off. For automatic startup, EN can be tied to VIN.
the increase in output noise. ensures that the error amplifier always operates at slightly greater than unity gain. places the frequency where the AC gain of the error amplifier is 3dB down from the DC gain. Figure 32. Noise Reduction Modification applications where power supply sequencing is critical.
analog.com Rev. 1 18 of 22 Current-Limit and Thermal Overload Protection The ADPL42002 is protected against damage due to excessive power dissipation by current and thermal overload protection circuits. The ADPL42002 is designed to current limit when the output load reaches 360mA (typical). When the output load exceeds 360mA, the output voltage is reduced to maintain a constant current limit. Thermal overload protection is included, which limits the junction temperature to a maximum of 150°C (typical). Under extreme conditions (that is, high ambient temperature and/or high power dissipation) when the junction temperature starts to rise above 15 0°C, the output is turned off, reducing the output current to zero. When the junction temperature drops below 135°C, the output is turned on again, and output current is restored to the operating value. Consider the case where a hard short from VOUT to ground occurs. At first, the ADPL42002 current limits, so that only 360mA is conducted into the short. If self heating of the junction is great enough to cause the temperature to rise above 150°C, thermal shutdown activates, turning off the output and reducing the output current to zero. As the junction temperature cools and drops below 135°C, the output turns on and conducts 360mA into the short, again causing the junction temperature to rise above 150°C. T his thermal oscillation between 135°C and 150°C causes a current oscillation between 360mA and 0mA that continues as long as the short remains at the output. Current and thermal limit protections protect the device against accidental overload conditions. For reliable operation, device power dissipation must be externally limited so that the junction temperature does not exceed 125°C.
Figure 35. 6-Lead Frame Chip Scale Package [LFCSP] 2mm x 2mm Body Figure 36. 8-Lead Standard Small Outline Package, with Exposed Pad [SOIC_N_EP]
0.20 REF
0.05 MAX
0.02 NOM
0.65 BSC
0.15 MIN
0.10 MAX
0.05 NOM
3.81 REF
1.04 REF
analog.com Rev. 1 21 of 22 ORDERING GUIDE Table 6. Ordering Guide
DESCRIPTION
ADPL42002ACPZN-R7 −40°C to +125°C Adjustable (1.2 V) 6-Lead LFCSP CP-6-3 LXW ADPL42002ACPZN1.8-R7 −40°C to +125°C 1.8 6-Lead LFCSP CP-6-3 LXS ADPL42002ACPZN2.5-R7 −40°C to +125°C 2.5 6-Lead LFCSP CP-6-3 LXT ADPL42002ACPZN3.3-R7 −40°C to +125°C 3.3 6-Lead LFCSP CP-6-3 LXU ADPL42002ACPZN5.0-R7 −40°C to +125°C 5 6-Lead LFCSP CP-6-3 LXV ADPL42002ARDZ-R7 −40°C to +125°C Adjustable (1.2 V) 8-Lead SOIC_N_EP RD-8-1 42002 ADPL42002ARDZ-1.8-R7 −40°C to +125°C 1.8 8-Lead SOIC_N_EP RD-8-1 200218 ADPL42002ARDZ-2.5-R7 −40°C to +125°C 2.5 8-Lead SOIC_N_EP RD-8-1 200225 ADPL42002ARDZ-3.3-R7 −40°C to +125°C 3.3 8-Lead SOIC_N_EP RD-8-1 200233 ADPL42002ARDZ-5.0-R7 −40°C to +125°C 5 8-Lead SOIC_N_EP RD-8-1 420025 1 Z = RoHS Compliant Part. 2 For additional voltage options, contact a local Analog Devices, Inc., sales or distribution representative. Table 7. Output Voltage Options 2 For additional voltage options, contact a local Analog Devices, Inc., sales or distribution representative. Table 8. Evaluation Boards
ALL INFORMATION CONTAINED HEREIN IS PROVIDED “AS IS” WITHOUT REPRESENTATION OR WARRANTY. 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. SPECIFICATI ONS ARE SUBJECT TO CHANGE WITHOUT NOTICE. NO LICENCE, EITHER EXPRESSED OR IMPLIED, IS GRANTED UNDER ANY ADI PATENT RIGHT, COPYRIGHT, MASK WORK RIGHT, OR ANY OTHER ADI INTELLECTUAL PROPERTY RIGHT RELATING TO ANY COMBINATION, MACHINE, OR PROCESS, IN WHICH ADI PRODUCTS OR SERVICES ARE USED. TRADEMARKS AND REGISTERED TRADEMARKS ARE THE PROPERTY OF THEIR RESPECTIVE OWNERS. ALL ANALOG DEVICES PRODUCTS CONTAINED HEREIN ARE SUBJECT TO RELEASE AND AVAILABILITY. analog.com Rev. 1 22 of 22