MAX77734

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


Please check latest availability status for a specific part variant.

Description

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 ›

MAX77734: Simplified Application Circuit MAX77734: Simplified Application Circuit Enlarge+

Key Features

  • 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
    • 12.25mm2 Total Solution Size

Applications/Uses

  • Action Cameras, Wearable/Body Cameras
  • Fitness Bands and other Bluetooth Wearables
  • Hearables: Headsets, Headphones, Earbuds
  • Low-Power Internet of Things (IoT) Gadgets
Part NumberLithium Ion CellsProtected VIN
(V)
Charging VIN
(V)
Charge Rate Set byMax. ICHG
(A)
Charge TerminationCharge RegulationOper. Temp.
(°C)
Package/PinsBudgetary
Price
maxmaxSee Notes
MAX77734 177I2C/SMBus0.475
Current Limit
Smart Battery Control
Timer
Linear-40 to +85
THIN WLP/20
$1.50 @1k
See All Battery Chargers (74)

Part NumberBattery Charger FeaturesInterface TypeVIN
(V)
VIN
(V)
Package/Pins
minmax
MAX77734 
Battery Charger
Thermal Die Regulation
I2C2.75.5
See Data Sheet
See All Multifunction PMICs (85)
Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.


MAX77734EVKIT: Evaluation Kit for the MAX77734

CAD Symbols and Footprints

  • MAX77734BENP+
  • MAX77734BENP+T
  • MAX77734CENP+
  • MAX77734CENP+T
  • MAX77734GENP+T
  • Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C  

    Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

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    Environmental Management System >

     
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    Related Resources


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    05/29/2020 - 05/31/2020, Detroit, MI
    2020 Detroit Grand Prix - Chevrolet Detroit Grand Prix presented by Lear Fast Facts The Chevrolet Detroit Grand Prix presented by Lear was hosted on Belle Isle, May 29 - 30 2020. The event featured the cars of the NTT IndyCar Series, the IMSA WeatherTech SportsCar Championship and the Trans Am Series presented by Pirelli. The weekend is collectively referred to as the Chevrolet Detroit Grand Prix presented by Lear and it once again featured the Chevrolet Dual in Detroit IndyCar doubleheader.

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