Triple 1800 mA Buck Regulator with Precision Enables and Power-Good Outputs Data Sheet ADP5135 FEATURES TYPICAL APPLICATION CIRCUIT Input voltage range: 3.0 V to 5.5 V ADP5135 Three 1800 mA buck regulators 3.0V HOUSE- AVIN TO 17 KEEPING V DDIO C7 24-lead, 4 mm 4 mm LFCSP package 5.5V AGND 0.1F VOUT1 18 10 Regulator accuracy: 1.8% L1 1H VIN1 SW1 16 15 Factory programmable or external adjustable VOUTx pins C1 PGND1 FB1 R1 10F BUCK1 14 11 C2 Precision enables for easier power sequencing 1.8A 22F R2 ON EN1 Power-good pins for monitoring each regulator 12 OFF PWM 3 MHz buck operation with forced PWM and auto PWM/PSM MODE 13 AUTO modes VIN2 VOUT2 3 BUCK1/BUCK2/BUCK3: output voltage range from 0.8 V to 3.8 V C3 9 PGND2 L2 1H 10F 5 SW2 BUCK2 4 1.8A APPLICATIONS R3 FB2 ON EN2 8 C4 OFF 7 22F R4 Power for processors, application specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), and VIN3 VOUT3 radio frequency (RF) chipsets 21 22 C5 L3 1H PGND3 SW3 Portable instrumentation and medical devices 10F BUCK3 19 20 1.8A FB3 R5 Space constrained devices C6 23 ON EN3 22F 24 OFF R6 V DDIO R7 100 PG1 R8 POWER 6 100 GOOD PG2 R9 2 100 PG3 1 Figure 1. Table 1. Family Devices GENERAL DESCRIPTION Max The ADP5135 combines three high performance buck regulators Device Channels Current Package (BUCK1, BUCK2, and BUCK3). It is available in a 24-lead, ADP5023 2 buck regulators, 1 LDO 800 mA, LFCSP (CP-24-10) 4 mm 4 mm LFCSP. 300 mA ADP5024 2 buck regulators, 1 LDO 1.2 A, LFCSP (CP-24-10) The high switching frequency of the buck regulators enables tiny 300 mA multilayer external components and minimizes the board space. ADP5034 2 buck regulators, 2 LDOs 1.2 A, LFCSP (CP-24-10), When the MODE pin is set to high, the buck regulators operate in 300 mA TSSOP (RE-28-1) forced pulse-width modulation (PWM) mode. When the ADP5037 2 buck regulators, 2 LDOs 800 mA, LFCSP (CP-24-10) 300 mA MODE pin is set to low, the buck regulators operate in PWM ADP5033 2 buck regulators, 2 LDOs 800 mA, WLCSP (CB-16-8) mode only when the load is above a predefined threshold. When with 2 ENx pins 300 mA the load current falls below this predefined threshold, the ADP5040 1 buck regulator, 2 LDOs 1.2 A, LFCSP (CP-20-10) regulator operates in power save mode (PSM), improving the 300 mA ADP5041 1 buck regulator, 2 LDOs 1.2 A, LFCSP (CP-20-10) light load efficiency. with supervisory circuit, 300 mA BUCK1 and BUCK2 operate in synchronization, and BUCK3 watchdog function, and manual reset operates out of phase to reduce the input capacitor requirement. ADP5133 2 buck regulators with 800 mA WLCSP (CB-16-8) Regulators in the ADP5135 are activated through dedicated 2 ENx pins enable pins. The default output voltages can be externally set in ADP5134 2 buck regulators, 2 LDOs 1.2 A, LFCSP (CP-24-7) with precision enable and 300 mA the adjustable version, or factory programmable to a wide range power good of preset values in the fixed voltage version. Rev. 0 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. No Tel: 781.329.4700 2014 Analog Devices, Inc. All rights reserved. license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Technical Support www.analog.com Trademarks and registered trademarks are the property of their respective owners. 12604-001ADP5135 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Theory of Operation ...................................................................... 13 Applications ....................................................................................... 1 Power Management Unit ........................................................... 13 Typical Application Circuit ............................................................. 1 Buck Regulators: BUCK1, BUCK2, AND BUCK3 ................ 15 General Description ......................................................................... 1 Applications Information .............................................................. 17 Revision History ............................................................................... 2 Buck External Component Selection ....................................... 17 Specif icat ions ..................................................................................... 3 Typical Application Schematics ................................................ 19 BUCK1, BUCK2, and BUCK3 .................................................... 4 Power Dissipation and Thermal Considerations ....................... 21 Input and Output Capacitors, Recommended ......................... 4 Buck Regulator Power Dissipation .......................................... 21 Absolute Maximum Ratings ............................................................ 5 Junction Temperature ................................................................ 22 Thermal Resistance ...................................................................... 5 PCB Layout Guidelines .................................................................. 23 ESD Caution .................................................................................. 5 Outline Dimensions ....................................................................... 24 Pin Configuration and Function Descriptions ............................. 6 Ordering Guide .......................................................................... 24 Typical Performance Characteristics ............................................. 7 REVISION HISTORY 11/14Revision 0: Initial Version Rev. 0 Page 2 of 24