2 3.18mm C BST 2 1.3mm EVALUATION KIT AVAILABLE Click here for production status of specific part numbers. MAX77680/MAX77681 3-Output SIMO Buck-Boost Regulator with Power Sequencer and 3A I Q General Description Benefits and Features The MAX77680/MAX77681 is a 3-channel single-inductor Single-Inductor, Multiple-Output (SIMO) Extends multiple-output (SIMO) buck-boost regulator that regulates Battery Life three independent rails using only 3A of quiescent cur- 300nA Shutdown Current rent (I ). The SIMO improves battery life by replacing in- 3.0A Operating Quiescent Current (3 SIMO Q efficient LDOs while being competitive in efficiency to tra- Channels On) ditional single-output bucks. Improves Overall System Efficiency while Reducing Size The SIMO operates on a input supply between 2.7V and Maintains Regulation without Dropout unlike 5.5V. The outputs are independently programmable be- Traditional Bucks tween 0.8V and 5.25V depending on ordering option. Glitchless Buck-Boost Operation Each output is a buck-boost with glitchless transition be- tween buck and boost operation. The SIMO can support Compact, High-Efficiency Power Solution >300mA loads (1.8V , 3.7V ). Three Independent Channels from SIMO Regulator OUT IN 2.7V to 5.5V Input Voltage Range from Single Cell The device integrates a flexible power sequencer (FPS) to Li-Ion control power-up/down order of each output. The default 0.8V to 5.25V Output Voltage Range (Table 1) output voltages and sequence can be programmed at the Flexible Power Sequencing 2 factory. An I C serial interface is used to further config- On-Key Input for Hardware Enable ure the device. Reset Output The MAX77680/MAX77681 is available in a 30-bump Small Size wafer-level package (WLP). Total solution size is only 2.75mm x 2.15mm (0.7mm max height) WLP 2 15.5mm . For a similar product with an LDO and battery 30-Bump, 0.4mm Pitch, 6 x 5 Array charger, refer to the MAX77650 data sheet. 2 15.2mm Total Solution Size Applications Ordering Information appears at end of data sheet. Hearables: Bluetooth Headphones and Earbuds Wearables: Fitness, Health, and Activity Monitors Action Cameras, Wearable/Body Cameras Low-Power Internet of Things (IoT) Gadgets Simplified Application Circuit MAX77680 2 2.7V TO 5.5V 1.5H 15.2mm SOLUTION SIZE DC INPUT IN SBB LXA V SYS LXB SYS 4.15mm BST CSBB0 GND SBB2 3.3V C SBB1 SYSTEM SBB1 1.2V RESOURCES C SBB2 SBB0 1.8V VSYS PGND C SYS nEN VIO VIO/POWER SDA SDA ON-KEY L SCL SCL nRST nRST nIRQ nIRQ PWR HLD PWR HLD PROCESSOR 0.2mm COMPONENT PITCH PULLUP RESISTORS NOT DRAWN 3-OUTPUT SINGLE-INDUCTOR, MULTIPLE-OUTPUT (SIMO) BUCK-BOOST REGULATOR 19-100374 Rev 0 7/18 4.75mmMAX77680/MAX77681 3-Output SIMO Buck-Boost Regulator with Power Sequencer and 3A I Q TABLE OF CONTENTS General Description 1 Applications 1 Benefits and Features 1 Simplified Application Circuit . 1 Absolute Maximum Ratings 6 Package Information . 6 30 WLP 0.4mm Pitch 6 Electrical Characteristics - Top Level 6 Electrical CharacteristicsSIMO Buck-Boost . 9 2 Electrical CharacteristicsI C Serial Interface . 11 Typical Operating Characteristics 13 Bump Configuration . 20 MAX77680/MAX77681 20 Bump Description 20 Detailed Description - Top Level . 22 Support Materials 22 Top-Level Interconnect Simplified Diagram 23 Voltage Monitors . 23 SYS POR Comparator 23 SYS Undervoltage-Lockout Comparator 23 SYS Overvoltage-Lockout Comparator . 23 nEN Enable Input 24 nEN Manual Reset . 24 nEN Dual-Functionality: Push-Button vs. Slide-Switch . 24 nEN Debounce 25 Interrupts (nIRQ) . 25 Reset Output (nRST) . 25 Power Hold Input (PWR HLD) 25 On/Off Controller . 26 Flexible Power Sequencer (FPS) 30 Thermal Alarms and Protection . 31 Register Map 31 Detailed DescriptionSIMO Buck-Boost 32 SIMO Features and Benefits 32 SIMO Control Scheme 33 SIMO Soft-Start 33 SIMO Output Voltage Configuration 34 www.maximintegrated.com Maxim Integrated 2