Dual 3 MHz, 800 mA Buck Regulators with One 300 mA LDO Data Sheet ADP5023 above a predefined threshold. When the load current falls below FEATURES a predefined threshold, the regulator operates in power save Main input voltage range: 2.3 V to 5.5 V mode (PSM) improving the light-load efficiency. Two 800 mA buck regulators and one 300 mA LDO 24-lead, 4 mm 4 mm LFCSP package Table 1. Family Models Regulator accuracy: 1.8% Maximum Factory programmable or external adjustable VOUTx Model Channels Current Package 3 MHz buck operation with forced PWM and auto PWM/PSM ADP5023 2 buck, 1 LDO 800 mA, LFCSP (CP-24-10) 300 mA modes ADP5024 2 buck, 1 LDO 1.2 A, 300 mA LFCSP (CP-24-10) BUCK1/BUCK2: output voltage range from 0.8 V to 3.8 V ADP5034 2 buck, 2 LDOs 1.2 A, 300 mA LFCSP (CP-24-10), LDO: output voltage range from 0.8 V to 5.2 V TSSOP (RE-28-1) LDO: input supply voltage from 1.7 V to 5.5 V ADP5037 2 buck, 2 LDOs 800 mA, LFCSP (CP-24-10) LDO: high PSRR and low output noise 300 mA ADP5033 2 buck, 2 LDOs 800 mA, WLCSP (CB-16-8) APPLICATIONS with 2 EN pins 300 mA ADP5040 1 buck, 2 LDOs 1.2 A, 300 mA LFCSP (CP-20-10) Power for processors, ASIC, FPGAs, and RF chipsets ADP5041 1 buck, 2 LDOs with 1.2 A, 300 mA LFCSP (CP-20-10) Portable instrumentation and medical devices supervisory, watch- Space constrained devices dog, manual reset GENERAL DESCRIPTION The two bucks operate out of phase to reduce the input capaci- tor requirement. The low quiescent current, low dropout voltage, The ADP5023 combines two high performance buck regulators and wide input voltage range of the ADP5023 LDO extends the and one low dropout (LDO) regulator in a small, 24-lead 4 mm battery life of portable devices. The ADP5023 LDO maintains 4 mm LFCSP to meet demanding performance and board space power supply rejection greater than 60 dB for frequencies as requirements. high as 10 kHz while operating with a low headroom voltage. The high switching frequency of the buck regulators enables tiny Regulators in the ADP5023 are activated though dedicated multilayer external components and minimizes the board space. enable pins. The default output voltages can be externally set in When the MODE pin is set high, the buck regulators operate in the adjustable version or factory programmable to a wide range forced PWM mode. When the MODE pin is set low, the buck of preset values in the fixed voltage version. regulators operate in PWM mode when the load current is TYPICAL APPLICATION CIRCUIT AVIN HOUSEKEEPING C FILT VOUT1 0.1F L1 1H VIN1 SW1 2.3V TO V AT OUT1 5.5V 800mA C1 FB1 R1 BUCK1 4.7F C5 10F R2 PGND1 ON EN1 EN1 OFF MODE PWM MODE PSM/PWM VOUT2 VIN2 MODE L2 1H SW2 V AT OUT2 C2 800mA 4.7F R3 BUCK2 FB2 C6 EN2 R4 10F EN2 ON PGND2 OFF EN3 VOUT3 AT V EN3 OUT3 300mA VIN3 R5 1.7V TO LDO FB3 C7 5.5V C3 1F R6 1F ADP5023 AGND Figure 1. Rev. F 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 One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. rights of third parties that may result from its use. Specifications subject to change without notice. Tel: 781.329.4700 2011-2020 Analog Devices, Inc. All rights reserved. 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Technical Support www.analog.com 09889-001ADP5023 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Theory of Operation ...................................................................... 15 Applications ...................................................................................... 1 Power Management Unit .......................................................... 15 General Description ......................................................................... 1 BUCK1 and BUCK2 .................................................................. 17 Typical Application Circuit ............................................................ 1 LDO .............................................................................................. 18 Revision History ............................................................................... 2 Applications Information ............................................................. 19 Specifications .................................................................................... 3 Buck External Component Selection ...................................... 19 General Specifications ................................................................. 3 LDO External Component Selection ...................................... 21 BUCK1 and BUCK2 Specifications ........................................... 4 Power Dissipation and Thermal Considerations ...................... 22 LDO Specifications ...................................................................... 5 Buck Regulator Power Dissipation .......................................... 22 Input and Output Capacitor, Recommended Specifications . 5 Junction Temperature ............................................................... 23 Absolute Maximum Ratings ........................................................... 6 PCB Layout Guidelines ................................................................. 24 Thermal Resistance ...................................................................... 6 Typical Application Schematics ................................................... 25 ESD Caution.................................................................................. 6 Bill of Materials ............................................................................... 26 Pin Configuration and Function Descriptions ............................ 7 Outline Dimensions ....................................................................... 27 Typical Performance Characteristics ............................................. 8 Ordering Guide .......................................................................... 27 REVISION HISTORY 8/2020Rev. E to Rev. F Changes to Figure 6 to Figure 8 ...................................................... 8 Changes to Figure 30 and Figure 31 ............................................ 12 Changes to Current Limit Parameter, Table 3 ............................. 4 Changes to Figure 34 and Figure 38 Caption ............................. 13 Change to Table 9 ........................................................................... 19 Changes to Undervoltage Lockout Section ................................ 16 8/2019Rev. D to Rev. E Moved Power Dissipation and Thermal Consideration Section .. 22 Changes to FB3 Pin Description .................................................... 7 Changes to Buck Regulator Power Dissipation Section ........... 22 Updated Outline Dimensions ...................................................... 27 7/2013Rev. C to Rev. D 1/2012Rev. 0 to Rev. A Added Table 1 Renumbered Sequentially .................................... 1 Changes to Figure 1 .......................................................................... 1 Changes to Features Section ............................................................ 1 Changes to NC Pin Description ..................................................... 7 Changes to Table 2 ............................................................................ 4 Changes to Figure 48 ..................................................................... 18 Changes to Table 3 and Table 4 ...................................................... 5 Changes to Figure 50 ..................................................................... 20 Changes to Table 5 ............................................................................ 6 Changes to Figure 52 and Figure 53 ............................................ 25 Changes to Table 7 ............................................................................ 7 Changes to Figure 34 ..................................................................... 13 1/2013Rev. B to Rev. C Changes to Buck Regulator Power Dissipation Section ........... 15 Changes to Figure 9 ........................................................................ 10 Changes to Undervoltage Lockout Section ................................ 18 Changes to Ordering Guide .......................................................... 28 Changes to LDO Section and Figure 48 ...................................... 20 9/2012Rev. A to Rev. B Changes to Table 9 ......................................................................... 22 Changes to Figure 52 ..................................................................... 25 Changes to Feature Section ............................................................. 1 Changes to Ordering Guide .......................................................... 27 Changes to BUCK Output Voltage Accuracy Parameter and Voltage Feedback Parameter, Table 2 ........................................... 4 8/2011Revision 0: Initial Version Changes to LDO Output Voltage Accuracy Parameter and Voltage Feedback Parameter, Table 3 ........................................... 5 Rev. F Page 2 of 28