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30V Internal Switch LCD Bias Supply

Product Details

Key Features

Parametric specs for Step-Up Switching Regulators
VIN (V) (min) 2.5
VIN (V) (max) 5.5
VOUT1 (V) (min) 2.5
VOUT1 (V) (max) 28
IOUT1 (A) (max) 0.02
Switch Type Internal
Output Adjust. Method Resistor
IQ (mA) (typ) 0.018
Shutdown Mode Supply Current (µA) (typ) 0.1
# DC-DC Outputs 1
Switching Frequency (kHz) 500
Package/Pins SOT23/6
TDFN/6
Budgetary
Price (See Notes)
1.84
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Simplified Block Diagram

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Parameters

Parametric specs for Step-Up Switching Regulators
VIN (V) (min) 2.5
VIN (V) (max) 5.5
VOUT1 (V) (min) 2.5
VOUT1 (V) (max) 28
IOUT1 (A) (max) 0.02
Switch Type Internal
Output Adjust. Method Resistor
IQ (mA) (typ) 0.018
Shutdown Mode Supply Current (µA) (typ) 0.1
# DC-DC Outputs 1
Switching Frequency (kHz) 500
Package/Pins SOT23/6
TDFN/6
Budgetary
Price (See Notes)
1.84

Key Features

  • Adjustable Output Voltage up to 30V
  • 20mA at 20V from a Single Li+ Battery
  • 88% Efficiency
  • Up to 500kHz Switching Frequency
  • Selectable Inductor Current Limit (125mA, 250mA, or 500mA)
  • 18µA Operating Supply Current
  • 0.1µA Shutdown Current
  • Avaiable in Two Small Packages
    • 6-Pin TDFN
    • 6-Pin SOT23

Applications/Uses

  • Cell Phones/Cordless Phones
  • Handy Terminals
  • LCD Bias Generators
  • Organizers
  • Palmtop Computers
  • PDAs and Other Handheld Devices

Description

The MAX1605 boost converter contains a 0.5A internal switch in a tiny 6-pin SOT23 package. The IC operates from a +2.4V to +5.5V supply voltage, but can boost battery voltages as low as 0.8V up to 30V at the output.

The MAX1605 uses a unique control scheme providing the highest efficiency over a wide range of load conditions. An internal 0.5A MOSFET reduces external component count, and a high switching frequency (up to 500kHz) allows for tiny surface-mount components. The current limit can be set to 500mA, 250mA, or 125mA, allowing the user to reduce the output ripple and component size in low-current applications.

Additional features include a low quiescent supply current and a shutdown mode to save power. The MAX1605 is ideal for small LCD panels with low current requirements, but can also be used in other applications. A MAX1605EVKIT evaluation kit (EV kit) is available to help speed up design time.

Simplified Block Diagram

MAX1605: Functional Diagram MAX1605: Functional Diagram Zoom icon

Technical Docs

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 .