MAX8969

Step-Up Converter for Handheld Applications

1A Boost Converter with Four External Components in a Small, 1.25mm x 1.25mm WLP Package


Please check latest availability status for a specific part variant.

Description

The MAX8969 is a simple 1A step-up converter in a small package that operates in any single-cell Li-ion application. This IC provides protection features such as input undervoltage lockout, short circuit, and overtemperature shutdown.

The IC transitions to skip mode seamlessly under lightload conditions to improve efficiency. Under these conditions, switching occurs only as needed, reducing switching frequency and supply current to maintain high efficiency.

For higher efficiency when input voltage is closer to the output voltage, two special modes of operation are available: track and automatic track. These modes allow users to balance quiescent current (IQ) vs. transient response time into boost mode. In both modes, the p-channel MOSFET acts as a current-limited switch such that VOUT follows VIN. However, in track mode, the boost circuits are disabled and the system controls the boost function with the EN, TREN inputs (IQ = 30µA). In automatic track mode (ATM), the boost circuits are enabled and the device automatically transitions into boost mode when VIN falls to 95% of the target VOUT (IQ = 60µA).

The IC is available in a small, 1.25mm × 1.25mm, 9-bump WLP (0.4mm pitch) package.

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MAX8969: Functional Diagram MAX8969 is a simple 1A step-up converter in a small package that operates in any single-cell Li-ion application | Functional Diagram Enlarge+

Key Features

  • Flexible System Integration
    • Up to 1A Output Current
    • 2.5V to 5.5V Input Voltage Range
    • 3.3V to 5.7V Output Voltage Options
  • Integrated Protection Increases System Robustness
    • Undervoltage Lockout (UVLO)
    • Short-Circuit Protection
    • Overtemperature Shutdown
  • High Efficiency and Low Quiescent Current Extends Battery Life
    • Over 90% Efficiency with Internal Synchronous Rectifier
    • 60µA IQ in Automatic Track Mode
    • 45µA IQ in Step-Up Mode
    • 30µA IQ in Track Mode
    • 1µA Shutdown Current
    • Skip Mode Under Light Load Condition Improves Efficiency
    • True Shutdown™ Prevents Current Flow from OUT_ to LX_
    • Soft-Start Limits Inrush Current to 480mA
  • Small Package and High Frequency Operation Reduce Board Space
    • 9-Bump 1.25mm × 1.25mm WLP Package
    • 3MHz PWM Switching Frequency
    • Small External Components

Applications/Uses

  • Cell Phones
  • eBooks
  • GPS, PND
  • Mobile Internet Devices
  • Smartphones
Part NumberVIN
(V)
VIN
(V)
VOUT1
(V)
VOUT1
(V)
Preset VOUT
(V)
IOUT1
(A)
Output Adjust. MethodSwitch TypeSynchronous SwitchingICC
(mA)
Shutdown Mode Supply Current
(µA)
Shutdown Mode Supply Current
(µA)
DC-DC OutputsOper. Freq.
(kHz)
Package/PinsBudgetary
Price
minmaxminmaxtyptypmaxSee Notes
MAX8969 2.55.53.35
3.3
5
1PresetInternalYes0.0450.8513000
WLP/9
$0.49 @1k
See All Step-Up Switching Regulators (98)
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.


MAX8969EVKIT: Evaluation Kit for the MAX8969

CAD Symbols and Footprints

  • MAX8969EWL33+
  • MAX8969EWL33+T
  • MAX8969EWL35+
  • MAX8969EWL35+T
  • MAX8969EWL37+
  • MAX8969EWL37+T
  • MAX8969EWL42+
  • MAX8969EWL42+T
  • MAX8969EWL50+
  • MAX8969EWL50+T
  • MAX8969EWL52+
  • MAX8969EWL52+T
  • MAX8969EWL53+
  • MAX8969EWL53+T
  • MAX8969EWL57+
  • MAX8969EWL57+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.

    Quality Management System >
    Environmental Management System >

     
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