1.5A USB-Friendly Li-Ion Battery Charger and Power-Path Management IC with 4.2 VBAT The BQ24075TRGTR (from Texas Instruments) is a highly integrated single-cell Li-Ion / Li-Polymer linear battery charger IC with power-path management. It is designed for portable and space-constrained applications, allowing a device to be powered from a USB port or AC adapter while simultaneously charging the battery. The device integrates charging control, power-path management, and safety features into a compact package. A key feature is its Dynamic Power Path Management (DPPM), which ensures the system is powered even when the battery is low or absent, while intelligently managing charging current. Key Features Battery Charging Supports single-cell Li-Ion / Li-Polymer batteries Up to 1.5 A programmable charge current Three-phase charging: Pre-charge (conditioning) Constant current Constant voltage Fixed 4.2 V charge voltage Power Path Management Dynamic Power Path Management (DPPM): Powers system and charges battery simultaneously Prioritizes system load over charging Allows system operation even with: Deeply discharged battery No battery connected Input & Power Features Operates from: USB input (100 mA / 500 mA selectable) AC adapter Programmable input current limit up to 1.5 A Input voltage range: ~4.35 V to 6.4 V (28 V max rating) Input dynamic power management (VIN-DPM) prevents source overload Protection & Safety Thermal regulation and shutdown Over-voltage protection (OVP) Short-circuit and reverse current protection Battery temperature monitoring (NTC thermistor input) Battery disconnect (SYSOFF) feature Control & Status Standalone operation (no MCU required, resistor-programmable) Charge status outputs: Charging Charge complete Power good Physical Characteristics Package: 16-pin VQFN (3 mm × 3 mm) Operating temperature: –40°C to +85°C #commonpartslibrary #integratedcircuit #powermanagement #batterycharger

LM3671 3.3V Buck Converter Breakout - 3.3V Output 600mA Max. Your power supply problems just got SUPER SOLVED! This 3.3V Buck Converter Breakout board is great for supplying power to low voltage circuits from a single Li-Ion cell battery or USB power. This chip provides up to 600-mA load current across the entire input voltage range of 3.5 to 5.5V. Great for your portable project, we made this "pin compatible" with the LM1117-3.3V TO-220 chip so you can swap it in for better performance (90-95% efficiency!) There's also an ENable pin, tie it low to shut down the output completely.

Single output buck-boost converter 130nA input quiescent current 96% peak efficiency (VIN = 3.6V; VOUT = 3.3V) Output current: up to 400mA (VIN > 2.5V, VOUT = 3.3V) Input voltage range: 1.8V to 5.5V, supports single-cell Li-ion, 2x or 31.5V AA/AAA batteries Output voltage range: 1.8V to 5.0V Output voltage control using a pin reader (RAA236105) Selectable input current limit DVS with settable slew rate control Selectable forced bypass power saving mode PWM/PFM and buck/bo Input voltage range: 1.8 V to 5.5 V Output voltage range: 1.8 V to 5.0 V (programmable) Output current: up to 400 mA Peak efficiency: up to ~96% Quiescent current (IQ): ~100 nA class (ultra-low power mode) Very low standby consumption (ideal for battery-powered systems) Bypass mode available for near-zero regulation overhead Topology: Synchronous buck-boost converter Can step up or step down voltage automatically Maintains stable output even when input varies above/below output #CommonPartsLibrary #IntegratedCircuit #PowerManagement #Voltage-regulator #Switching-regulator #RAA2361052

2-Cell Li-Ion or Li-Polymer Switching Charger Compatible with 5V Input and Integrated Bidirectional Charge/Discharge with Cell Balance #ultralibrarian

2-Cell Li-Ion or Li-Polymer Switching Charger Compatible with 5V Input and Integrated Bidirectional Charge/Discharge with Cell Balance #ultralibrarian

Single output buck-boost converter 130nA input quiescent current 96% peak efficiency (VIN = 3.6V; VOUT = 3.3V) Output current: up to 400mA (VIN > 2.5V, VOUT = 3.3V) Input voltage range: 1.8V to 5.5V, supports single-cell Li-ion, 2x or 31.5V AA/AAA batteries Output voltage range: 1.8V to 5.0V Output voltage control using a pin reader (RAA236105) Selectable input current limit DVS with settable slew rate control Selectable forced bypass power saving mode PWM/PFM and buck/bo RAA2361052GNP

The TP4056 1A Li-ion Lithium Battery Charging Module with Current Protection – Mini USB is a compact device designed to charge individual lithium ion (Li-Ion) cells that lack their own protective circuit, such as 16550s, with a single cell capacity of 3.7V and 1 Ah or higher. This battery charging module employs the TP4056 charger IC and DW01 battery protection IC to provide a charge current of 1A, which will cease upon completion of the charging process. https://robocraze.com/products/tp4056-lithium-battery-charging-board #PCB #TP4056 #battery

Battery Holder (Open) Multiple (20700, 21700) 1 Cell Solder Lug The Keystone 1121 is a PCB-mount cylindrical battery holder manufactured by Keystone Electronics, designed to hold one large-format lithium-ion cell, specifically 20700 or 21700 battery sizes. It features an open-frame holder design with solder lug (through-hole) terminals, allowing secure mechanical mounting and reliable electrical connection to a PCB. This type of holder is commonly used in high-capacity battery-powered systems where replaceable cylindrical cells are required. Key Features Battery Compatibility Supports 20700 and 21700 cylindrical Li-ion cells Designed for single-cell (1S) configurations Mechanical & Mounting Through-hole PCB mounting Solder lug terminals for strong electrical and mechanical connection Open-style holder for easy battery insertion/removal Construction Metal contacts for low resistance and durability Designed to securely retain larger cylindrical batteries Physical Characteristics Height above PCB: approx. 17.27 mm Part of Keystone 1100 series holders Typical Applications Battery-powered embedded systems Portable power devices Industrial electronics High-capacity IoT or energy storage modules #holder

1-cell, 1-A, Li-ion battery charger with 50-mA LDO 10-WSON -40 to 85 #commonpartslibrary #integratedcircuit #powermanagement #batterycharger

2A 1-Cell to 2-Cell Li-Ion Battery Charger in a QFN-16 (3mmx3mm) Package #ultralibrarian