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4MHz, 500mA Synchronous Step-Down DC-DC Converters in Thin SOT and TDFN

First 4MHz Step-Down DC-DC Converters Deliver 500mA with Over 90% Efficiency in SOT23 and TDFN

Product Details

Key Features

Parametric specs for Step-Down Switching Regulators
VIN (V) (min) 2.7
VIN (V) (max) 5.5
VOUT1 (V) (min) 0.6
VOUT1 (V) (max) 2.5
IOUT1 (A) (max) 0.5
Switch Type Internal
Output Adjust. Method Resistor
Synchronous Switching? Yes
# DC-DC Outputs 1
Switching Frequency (kHz) 4000
Package/Pins TSOT/5
Budgetary
Price (See Notes)
1.81
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Simplified Block Diagram

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Sampling:
Selecting the Sample button above will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact SampleSupport@analog.com with any questions regarding this Sample Site.

Parameters

Parametric specs for Step-Down Switching Regulators
VIN (V) (min) 2.7
VIN (V) (max) 5.5
VOUT1 (V) (min) 0.6
VOUT1 (V) (max) 2.5
IOUT1 (A) (max) 0.5
Switch Type Internal
Output Adjust. Method Resistor
Synchronous Switching? Yes
# DC-DC Outputs 1
Switching Frequency (kHz) 4000
Package/Pins TSOT/5
Budgetary
Price (See Notes)
1.81

Key Features

  • Up to 4MHz PWM Switching Frequency
  • 500mA Guaranteed Output Current
  • 40µA (typ) Quiescent Current
  • Adjustable Output Voltage from 0.6V to 2.5V
  • Logic-Controlled Output Voltage (MAX8561)
  • Drives External Bypass FET (MAX8562)
  • ±1.5% Initial Accuracy
  • Soft-Start Eliminates Inrush Current
  • Fast Voltage-Positioning Transient Response
  • Internal Synchronous Rectifier
  • 2.7V to 5.5V Input
  • 0.1µA Logic-Controlled Shutdown
  • Thermal Shutdown
  • Thin SOT23 or Space-Saving 3mm x 3mm x 0.8mm TDFN Packages

Applications/Uses

  • CDMA/RF Power-Amplifier Supplies
  • Cell Phones/Smartphones
  • Microprocessor/DSP Core Supplies
  • PDAs, DSC, and MP3 Players

Description

The MAX8560/MAX8561/MAX8562 step-down DC-DC converters are optimized for applications that prioritize small size and high efficiency. They utilize a proprietary hysteretic-PWM control scheme that switches with fixed frequency and is adjustable up to 4MHz, allowing customers to trade efficiency for smaller external components. Output current is guaranteed up to 500mA, while quiescent current is only 40µA (typ).

Internal synchronous rectification greatly improves efficiency and eliminates the external Schottky diode required in conventional step-down converters. Built-in soft-start eliminates inrush current to reduce input capacitor requirements. The MAX8561 features logic-controlled output voltage, while the MAX8562 drives an external bypass FET.

The MAX8560 is available in a 5-pin Thin SOT23 package. The MAX8561/MAX8562 are available in space-saving 8-pin 3mm x 3mm Thin DFN packages.

Simplified Block Diagram

MAX8560, MAX8561, MAX8562: Typical Operating Circuit MAX8560, MAX8561, MAX8562: Typical Operating Circuit 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 .

Sampling:
Selecting the Sample button above will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact SampleSupport@analog.com with any questions regarding this Sample Site.