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2.2MHz, Dual, Step-Down DC-DC Converters, Dual LDOs, and Active-Low RESET

Four Automotive Converters in a 5mm x 5mm Package

Product Details

Key Features

Parametric specs for Step-Down Switching Regulators
VIN (V) (min) 3.7
VIN (V) (max) 28
VOUT1 (V) (min) 3
VOUT1 (V) (max) 5
IOUT1 (A) (max) 1.2
Switch Type Internal
Preset VOUT (V) 50mV steps
Output Adjust. Method Preset
Synchronous Switching? Yes
# DC-DC Outputs 2
Switching Frequency (kHz) 2200
Package/Pins TQFN/20
Budgetary
Price (See Notes)
6.63
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Simplified Block Diagram

Technical Docs

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Parameters

Parametric specs for Step-Down Switching Regulators
VIN (V) (min) 3.7
VIN (V) (max) 28
VOUT1 (V) (min) 3
VOUT1 (V) (max) 5
IOUT1 (A) (max) 1.2
Switch Type Internal
Preset VOUT (V) 50mV steps
Output Adjust. Method Preset
Synchronous Switching? Yes
# DC-DC Outputs 2
Switching Frequency (kHz) 2200
Package/Pins TQFN/20
Budgetary
Price (See Notes)
6.63

Key Features

  • 1.2A High-Efficiency 2.2MHz DC-DC Converter
    • 3.7V to 28V Operating Supply Voltage
    • 45V Load-Dump Protection
    • Output Voltage: 3.0V to 5.5V
  • 600mA High-Efficiency 2.2MHz DC-DC Converter
    • 2.7V to 5.5V Supply Voltage
    • Output Voltage: 1.0V to 3.9V
    • 180° Out-of-Phase Operation
    • Forced-PWM and Auto-PWM Modes
  • LDO Linear Regulators
    • OUT3: 1.0V to 4.15V at 300mA
    • OUT4: 1.0V to 4.15V at 300mA
    • Separate Inputs for Increased Efficiency
  • Enable Input
  • Active-Low RESET Output Monitoring on OUT1 and OUT2
  • Overtemperature and Short-Circuit Protection
  • Available in
    • 5mm × 5mm × 0.8mm, 20-Pin TQFN-EP
    • 4.5mm × 6.5mm, 20-Pin TSSOP-EP

Applications/Uses

  • Automotive

Description

The MAX16922 power-management integrated circuit (PMIC) is designed for medium power-level automotive applications and integrates multiple supplies in a small footprint. The device includes one high-voltage stepdown converter (OUT1) and three low-voltage cascaded DC-DC converters (OUT2, OUT3, OUT4). OUT1 and OUT2 are step-down DC-DC converters, and OUT3/OUT4 are linear regulators. The device also includes a reset output (active-low RESET) and a high-voltage-compatible enable input (EN).

The 1.2A output high-efficiency, step-down DC-DC converter (OUT1) operates from a voltage up to 28V continuous and is protected from load-dump transients up to 45V. The 600mA output high-efficiency step-down DC-DC converter (OUT2) runs from a voltage up to 5.5V. The two 300mA LDO linear regulators offer low dropout of only 130mV (typ). The power-good active-low RESET output provides voltage monitoring for OUT1 and OUT2.

OUT1 and OUT2 use fast 2.2MHz PWM switching and small external components. The high-voltage converter (OUT1) enters skip mode automatically under light loads to prevent an overvoltage condition from occurring at the output. The low-voltage synchronous DC-DC converter (OUT2) can operate in forced-PWM mode to prevent any AM band interference or high-efficiency auto-PWM mode.

The MAX16922 includes overtemperature shutdown and overcurrent limiting. The device is designed to operate from -40°C to +125°C ambient temperature.

Simplified Block Diagram

MAX16922: Functional Diagram MAX16922: 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 .

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.