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High-Voltage Micropower Boost Converter

Industry Highest Efficiency Boost Converter in Smallest Solution

Product Details

Key Features

Parametric specs for Step-Up Switching Regulators
VIN (V) (min) 1.8
VIN (V) (max) 4.5
VOUT1 (V) (min) 5.5
VOUT1 (V) (max) 20
IOUT1 (A) (max) 0.016
Switch Type Internal
Output Adjust. Method Resistor
Synchronous Switching? Yes
IQ (mA) (typ) 0.028
Shutdown Mode Supply Current (µA) (typ) 0.013
Shutdown Mode Supply Current (µA) (max) 0.2
# DC-DC Outputs 1
Package/Pins THIN WLP/6
Budgetary
Price (See Notes)
0.65
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Simplified Block Diagram

Technical Docs

Data Sheet High-Voltage Micropower Boost Converter Dec 20, 2021

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Parameters

Parametric specs for Step-Up Switching Regulators
VIN (V) (min) 1.8
VIN (V) (max) 4.5
VOUT1 (V) (min) 5.5
VOUT1 (V) (max) 20
IOUT1 (A) (max) 0.016
Switch Type Internal
Output Adjust. Method Resistor
Synchronous Switching? Yes
IQ (mA) (typ) 0.028
Shutdown Mode Supply Current (µA) (typ) 0.013
Shutdown Mode Supply Current (µA) (max) 0.2
# DC-DC Outputs 1
Package/Pins THIN WLP/6
Budgetary
Price (See Notes)
0.65

Key Features

  • 28μA Quiescent Supply Current from Input
  • Output Short Circuit Protection
  • Overtemperature Protection
  • True Shutdown Mode
    • 13nA Shutdown Current
    • No Reverse Current from OUT
  • 90% Peak Efficiency
  • 1.8V to 4.5V Input Range
  • 5.5V to 20V Output Voltage Range
  • 100mA Peak Inductor Current Limit
  • 1.27mm x 0.87mm 6-Bump WLP (3 x 2, 0.4mm Pitch) Package
  • -40°C to +125°C Temperature Range

Applications/Uses

  • Primary Cell Portable Systems
  • Battery Powered Medical Equipment
  • Tiny, Low-Power IoT Sensors
  • Low-Power Wireless Communication Products
  • Secondary-Cell Portable Systems

Description

The MAX17291B is a low quiescent current boost (step-up) DC-DC converter with a 100mA peak inductor current limit and True Shutdown. True Shutdown disconnects the output from the input with no forward or reverse current. The output voltage is set with an external resistor-divider. The MAX17291B offers low quiescent current, small total solution size, and high efficiency throughout the entire load range. The MAX17291B is a highly integrated boost converter designed for applications requiring high voltage and tiny solution size, such as sensor modules. It integrates a power switch, power diode, and output load switch. It can output 5.5V to 20V from a 1.8V to 4.5V input supply range. The load switch is turned off under shutdown mode, truly disconnecting the load from the input voltage thus minimizing the leakage current during shutdown mode. The device operates in a discontinuous conduction mode of operation. The device features short-circuit and thermal protection.

The MAX17291B employs a power-save mode with pulse frequency modulation (PFM) to improve efficiency. The on-time is determined by a peak inductor current limit of 100mA. Once the inductor current hits its limit, the on-time is terminated and the power diode is forward-biased. During the off-time, charge is transferred to output capacitance, causing its voltage to rise. The off-time is terminated once the inductor current ramps down to zero; the load is supplied by the output capacitor and the output voltage declines. When the FB voltage falls below the reference voltage, the device initiates the on-time again to bring the output voltage up. The MAX17291B will clamp the average input current to maximum of 50mA.

Simplified Block Diagram

MAX17291B: Simplified Application Diagram MAX17291B: Simplified Application Diagram Zoom icon

Technical Docs

Data Sheet High-Voltage Micropower Boost Converter Dec 20, 2021

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .