MAX8819C
PMIC with Integrated Charger and Smart Power Selector™ in a 4mm x 4mm TQFN
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A Complete Power Solution for Handheld Applications Includes a Battery Charger, Three Step-Down Converters, and WLED Power
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Features
- Smart Power Selector
- Operates with No Battery Present
- USB/AC Adapter One-Cell Li+ Charger
- Three 2MHz Step-Down Converters
- 95% Peak Efficiency
- 100% Duty Cycle
- ±3% Output Accuracy over Load/Line/Temperature
- 2 to 6 Series WLED Driver with Dimming Control
- Active-Low REG1 Reset Output
- Short-Circuit/Thermal-Overload/Input Undervoltage/Overvoltage Protection
- Power-Up/Down Sequencing (MAX8819C)
- Total Solution Size: Less Than 90mm²
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The MAX8819_ is a complete power solution for MP3 players and other handheld applications. The IC includes a battery charger, step-down converters, and WLED power. It features an input current-limit switch to power the IC from an AC-to-DC adapter or USB port, a 1-cell lithium ion (Li+) or lithium polymer (Li-Poly) charger, three step-down converters, and a step-up converter with serial step dimming for powering two to six white LEDs. All power switches for charging and switching the system load between battery and external power are included on-chip. No external MOSFETs are required. The MAX8819C offers a sequenced power-up/power-down of OUT1, OUT2, and then OUT3.
Maxim's Smart Power Selector makes the best use of AC-to-DC adapter power or limited USB power. Battery charge current and input current limit are independently set. Input power not used by the system charges the battery. Charge current is resistor programmable and the input current limit can be selected as 100mA, 500mA, or 1A. Automatic input selection switches the system load from battery to external power. In addition, on-chip thermal limiting reduces the battery charge rate to prevent charger overheating.
Applications
- Cellular Telephones
- Digital Cameras
- Handheld Instrumentation
- Low-Power Handheld Products
- MP3 Players
- PDAs
- Portable GPS Devices
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MAX8819C
Documentation
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Data Sheet
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MAX8819-MAX8819C: PMIC with Integrated Charger and Smart Power Selector™ in a 4mm x 4mm TQFN Data Sheet (Rev.1)
MAX8819-MAX8819C_cn: 集成了充电器和智能电源选择器(Smart Power Selector™)的PMIC，4mm x 4mm TQFN封装 Data Sheet (Rev.1)
Reliability Data
1
33.38K
Documentation
Software & Part Ecosystem
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PMIC with Integrated Charger and Smart Power Selector for Handheld Devices |
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Evaluation Kits 1
MAX8819AEVKIT
Evaluation Kit for the MAX8819A, MAX8819B, MAX8819C, and MAX8819D
Features and Benefits
- USB/AC Adapter 1-Cell Li+ Charger
- Jumper Options Offer Four Input Current Limits
- Jumper Options Allow for Easy Evaluation of Five Charge-Current Settings
- Three 2MHz Step-Down Converters
- External Resistors Allow for Output-Voltage Adjustment
- Resistor Option Allows for Reducing Quiescent Current by Disabling Regulator 2
- 6-Series WLEDs Showcase WLED Driver
- Jumper Option Allows for WLED Overvoltage Protection Evaluation
- On-Board Pulse Generator Allows for Pushbutton Evaluation of the WLED Dimming Feature
- Lead-Free and RoHS Compliant
- Fully Assembled and Tested
Product Detail
The MAX8819A evaluation kit (EV kit) is a fully assembled and tested PCB for evaluating the MAX8819A power-management IC (PMIC). The MAX8819A PMIC is ideal for use in MP3 players and other handheld applications. In addition to the three step-down converters and WLED driver, the MAX8819A integrates a 1-cell lithium ion (Li+) or lithium polymer (Li-poly) charger and Smart Power Selector™ with a power input that accepts a USB or AC-to-DC adapter.
The MAX8819A EV kit can also be used to evaluate the MAX8819B, MAX8819C, or MAX8819D. Request a pin-compatible sample when ordering this EV kit.
Applications
- Cellular Telephones
- Digital Cameras
- Handheld Instrumentation
- Low-Power Handheld Products
- MP3 Players
- PDAs
- Portable GPS Devices