PMIC - Battery Management

Part Number	Description / PDF	Quantity
MAX20303CEWN+T Maxim Integrated	IC BATT CHG MGMT PWR 56WLP	0
DS2778G+ Maxim Integrated	IC BATT MFUNC LI-ION 2CEL 14TDFN	841140
MAX17301X+ Maxim Integrated	IC BATT FUEL LI-ION 1C 15WLP	64
DS2746G+T&R Maxim Integrated	IC BATT MONITOR 2-WIRE 10TDFN	0
MAX20335AEWX+T Maxim Integrated	IC BATT PWR MGMT LI-ION 36WLP	0
MAX17261METD+T Maxim Integrated	IC BATT LIFEPO4/LI-ION 1C 14TDFN	0
MAX1259EWE+T Maxim Integrated	IC BATT PWR MGMT 16SOIC	0
MAX17201G+00E Maxim Integrated	IC BATT MONITOR 1CELL 14TDFN	1172
DS2784G+T&R Maxim Integrated	IC BATT MFUNC LI-ION 1CEL 14TDFN	0
MAX17312X+ Maxim Integrated	IC BATT FUEL LI-ION 1C 15WLP	180
MAX1259EWE+ Maxim Integrated	IC BATT PWR MGMT 16SOIC	1671564
MAX17843ACB/V+ Maxim Integrated	IC BAT MON MULT-CHEM 12C 64LFQFP	1105
DS2756E+ Maxim Integrated	IC BATT MON LI-ION 1CELL 8TSSOP	7413626
DS2438Z+ Maxim Integrated	IC BATT MONITOR SMART 8SOIC	0
DS2762AE+ Maxim Integrated	IC BATT MONITOR LI-ION 16TSSOP	148192
MAX20303AEWN+T Maxim Integrated	IC BATT PWR MGMT 56WLP	2000
DS2781G+ Maxim Integrated	IC BATT MON LI-ION 1-2CEL 10TDFN	3939525
MAX6776XKC+T Maxim Integrated	IC BATT MON MULTI-CHEM 1C SC70-5	112532500
MAX20360AEWZ+ Maxim Integrated	IC BATT FUEL LI-ION 1C 72WLP	900
DS2782G+ Maxim Integrated	IC BATT MON LI-ION 1CELL 10TDFN	24881425

PMIC - Battery Management

1. Overview

Power Management Integrated Circuits (PMICs) with Battery Management functionality are specialized semiconductor devices designed to monitor, control, and optimize battery operations in electronic systems. These ICs handle critical tasks including charging control, discharge regulation, capacity monitoring, and safety protection. Their importance has grown exponentially with the proliferation of portable electronics, electric vehicles, and energy-harvesting systems, where battery efficiency and safety are paramount.

2. Major Types & Functional Classification

Type	Functional Features	Application Examples
Battery Charge Management ICs	Support Li-ion/Polymer, NiMH, and lead-acid chemistries; implement CC/CV charging, thermal regulation	Smartphones, power banks
Fuel Gauge ICs	Impedance tracking, voltage-based SOC estimation, data logging	Laptops, medical devices
Battery Protection ICs	Overvoltage, overcurrent, short-circuit, and temperature protection	E-bikes, battery packs
Power Path Management ICs	Dynamic power distribution between charger and system load	Tablets, drones

3. Structure & Composition

A typical PMIC Battery Management IC integrates:

Analog Front-End (AFE) with precision ADC/DAC
Digital control logic (state machines or embedded microcontrollers)
Communication interfaces (I2C, SMBus, SPI)
High-side/low-side MOSFET drivers
Temperature sensing elements
Non-volatile memory for calibration data

Advanced packages (QFN, BGA) enable high integration while maintaining thermal performance.

4. Key Technical Specifications

Parameter	Typical Range	Importance
Charging Current Range	100mA - 5A	Determines charge speed and battery size compatibility
SOC Estimation Accuracy	1-5%	Impacts runtime prediction reliability
Quiescent Current	1-20 A	Crucial for standby power efficiency
Communication Speed	400kHz - 3.4MHz (I2C)	Affects system responsiveness
Operating Temperature	-40 C to +125 C	Determines environmental robustness

5. Application Fields

Consumer Electronics: Smartphones (Apple iPhone PMICs), Smartwatches (Fitbit Charge series)
Medical Devices: Portable ultrasound machines (Philips Lumify), infusion pumps
Automotive: EV battery packs (Tesla Model 3 BMS), start-stop systems
Industrial: Robotics (Boston Dynamics Atlas), energy storage systems

6. Leading Manufacturers & Products

Manufacturer	Representative Product	Key Features
Texas Instruments	BQ25790	Single-chip solution with USB PD 3.0, 3.5A charging
Analog Devices	MAX17055	ModelGauge m3 algorithm, 60s runtime prediction
STMicroelectronics	STM32F051x	Cortex-M0 core with integrated Li-ion charger
NXP Semiconductors	PF1550	PMIC for i.MX8 processors with dynamic voltage scaling

7. Selection Guidelines

Key considerations:

Battery chemistry compatibility (Li-ion requires CC/CV profile)
System voltage requirements (USB PD needs 5-20V support)
Form factor constraints (Wearable devices demand WCSP packages)
Communication protocol compatibility (I2C vs. SMBus vs. HDQ)
Safety certifications (UL 1642 for lithium batteries)
Software ecosystem (development tools and reference designs)

Example: For a 2-cell Li-ion notebook battery, select a multi-cell fuel gauge (e.g., BQ30z55) with SHA-256 authentication and PC companion software support.

8. Industry Trends

Integration of wireless charging (Qi standard) with battery management
Adoption of AI algorithms for adaptive charging profiles
Development of ultra-low-power PMICs for IoT edge devices
Increase in ASIL-D rated automotive-grade PMICs for EVs
Transition to 3D packaging for higher functional density
Growing adoption of battery health analysis (BHA) algorithms