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Ultra-Low Power Tiny PMIC with Power Path Charger for Small Li+ and 150mA LDO

Highly-Integrated Power Solution with Safe Charging and Low-Noise LDO for Hearables and IoT

产品详情

主要特征

应用/用途

Parametric specs for Battery Chargers
Charging VIN (V) (max) 7
Max. ICHG (A) 0.475
Cell Chemistry Li-Ion
Li-Polymer
# Lithium Ion Cells 1
Protected VIN (V) (max) 7
Charger (V) 3.55 to 4.4
Oper. Temp. (°C) -40 to +85
Package/Pins THIN WLP/20
Budgetary
Price (See Notes)
1.68
Parametric specs for Multifunction PMICs
VIN (V) (min) 2.7
VIN (V) (max) 5.5
# Step-Down Outputs 3
# LDO Outputs 1
Battery Charger Features Battery Charger
Thermal Die Regulation
Package/Pins THIN WLP/20
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参量

Parametric specs for Battery Chargers
Charging VIN (V) (max) 7
Max. ICHG (A) 0.475
Cell Chemistry Li-Ion
Li-Polymer
# Lithium Ion Cells 1
Protected VIN (V) (max) 7
Charger (V) 3.55 to 4.4
Oper. Temp. (°C) -40 to +85
Package/Pins THIN WLP/20
Budgetary
Price (See Notes)
1.68
Parametric specs for Multifunction PMICs
VIN (V) (min) 2.7
VIN (V) (max) 5.5
# Step-Down Outputs 3
# LDO Outputs 1
Battery Charger Features Battery Charger
Thermal Die Regulation
Package/Pins THIN WLP/20

主要特征

  • Extends Battery Life
    • 200nA Factory-Ship Mode for Long Shelf Life
    • 500nA Shutdown Current
    • 4.5µA Quiescent Current with LDO Enabled
    • Charger Allows Battery to Relax after Charging
  • Linear Charger Optimized for Small Battery Size
    • 7.5mA to 300mA Fast-Charge Current
    • Battery Regulation Voltage from 3.6V to 4.6V
    • Accurate Termination Current as low as 0.375mA
    • Instant-On Functionality provided by Maxim's Smart Power Selector™
    • JEITA Battery Temperature Monitors for Safe Charging
  • Highly Integrated
    • 150mA LDO with Power-OK Output
    • Dual-Channel Current Sink for LEDs
    • Analog Multiplexer for Power Monitoring
    • Watchdog Timer
    • On-Key Input for LDO Enable and Manual Reset
  • Small Size
    • 2.23mm x 1.97mm (0.5mm max height) WLP
    • 20-Bump, 0.4mm Pitch, 4 x 5 Array

应用/用途

  • Action Cameras, Wearable/Body Cameras
  • Fitness Bands and other Bluetooth Wearables
  • Hearables: Headsets, Headphones, Earbuds
  • Low-Power Internet of Things (IoT) Gadgets

描述

The MAX77734 is a tiny PMIC for applications where size and simplicity are critical. The IC integrates a linear-mode Li+ battery charger, low-dropout linear regulator (LDO), analog multiplexer, and dual-channel current sink driver.

The charger is designed for small-battery systems that require accurate termination as low as 0.375mA. The circuit can instantly regulate the system voltage when an input source is connected even if the battery is depleted.

The 150mA LDO's output is programmable between 0.8V and 3.975V with I²C. The analog MUX enables an external ADC to perform conversions on battery V&I signals for power monitoring. The current sinks are capable of sinking 12.8mA each and can be programmed for LEDs to blink in custom patterns.

The MAX77734 is available in a 20-bump, 0.4mm pitch wafer-level package (WLP). For a similar product with additional regulators, see the MAX77650.

Design Solution: Can You Hear Me Now? Extend the Life of Your Hearable Device ›

简化框图

MAX77734: Simplified Application Circuit MAX77734: Simplified Application Circuit Zoom icon

支持和培训

在Maxim的知识库中搜索技术问题的答案

过滤搜索

Maxim的专业工程师团队也会为您解答相应的技术问题,请访问Maxim的 支持中心