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Step-Down Controller with Dual 2.1MHz Step-Down DC-DC Converters

Highly Integrated Automotive PMIC with Three DC-DC Step-Down Outputs, Low IQ, and Low Minimum On-Time

Product Details

Key Features

Parametric specs for Step-Down Switching Regulators
VIN (V) (min) 3.5
VIN (V) (max) 36
VOUT1 (V) (min) 0.8
VOUT1 (V) (max) 5.6
IOUT1 (A) (max) 3
Switch Type External
Internal
Preset VOUT (V) 5
Output Adjust. Method Preset
Resistor
Synchronous Switching? Yes
# DC-DC Outputs 3
Switching Frequency (kHz) 2100
350
Package/Pins QFND/32
TQFN/32
TQFN-CU/32
Budgetary
Price (See Notes)
6.25
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Simplified Block Diagram

Technical Docs

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Parameters

Parametric specs for Step-Down Switching Regulators
VIN (V) (min) 3.5
VIN (V) (max) 36
VOUT1 (V) (min) 0.8
VOUT1 (V) (max) 5.6
IOUT1 (A) (max) 3
Switch Type External
Internal
Preset VOUT (V) 5
Output Adjust. Method Preset
Resistor
Synchronous Switching? Yes
# DC-DC Outputs 3
Switching Frequency (kHz) 2100
350
Package/Pins QFND/32
TQFN/32
TQFN-CU/32
Budgetary
Price (See Notes)
6.25

Key Features

  • High-Efficiency Voltage DC-DC Controller Saves Power
    • 3.5V to 36V Operating Supply Voltage
    • Output Voltage: Pin Selectable, Fixed, or Resistor-Divider Adjustable
    • 350kHz to 2.1MHz Operation
    • 30µA Quiescent Current with DC-DC Controller Enabled
  • Dual 2.1MHz DC-DC Converters with Integrated FETs Save Space
    • OUT2 and OUT3 are Cascaded from OUT1, Improving Efficiency
    • 3A Integrated FETs
    • 0.8V to 3.95V Output Voltage
    • Fixed or Resistor-Divider-Adjustable Output Voltage
    • 180° Out-of-Phase Operation
    • Robust for the Automotive Environment
  • Current-Mode Architecture with Forced-PWM and Skip Modes of Operation
    • Frequency Synchronization Input/Output Reduces System Noise
    • Individual Enable Inputs and Active-Low RESET_ Outputs
    • Overtemperature and Short-Circuit Protection
    • AECQ-100 Qualified
    • 32-Pin TQFN-EP (5mm x 5mm x 0.75mm) and Side-Wettable QFND-EP (5mm x 5mm x 0.8mm)
    • -40°C to +125°C Operating Temperature Range

Applications/Uses

  • Automotive
  • Industrial

Description

The MAX16993 power-management integrated circuit (PMIC) is a 2.1MHz, multichannel, DC-DC converter designed for automotive applications. The device integrates three supplies in a small footprint. The device includes one high-voltage step-down controller (OUT1) designed to run directly from a car battery and two low-voltage step-down converters (OUT2/OUT3) cascaded from OUT1. Under no-load conditions, the MAX16993 consumes only 30µA of quiescent current, making it ideal for automotive applications.

The high-voltage synchronous step-down DC-DC controller (OUT1) operates from a voltage up to 36V continuous and is protected from load-dump transients up to 42V. There is a pin-selectable frequency option of either 2.1MHz or a factory-set frequency for 1.05MHz, 525kHz, 420kHz, or 350kHz. The low-voltage, synchronous step-down DC-DC converters run directly from OUT1 and can supply output currents up to 3A.

The device provides a spread-spectrum enable input (SSEN) to provide quick improvement in electromagnetic interference when needed. There is also a SYNC input for providing an input to synchronize to an external clock source (see the Selector Guide in the full data sheet). The device includes overtemperature shutdown and overcurrent limiting. The device also includes individual active-low RESET_ outputs and individual enable inputs. The active-low RESET_ outputs provide voltage monitoring for all output channels.

The MAX16993 is available in a 32-pin TQFN/side-wettable QFND-EP package and is specified for operation over the -40°C to +125°C automotive temperature range.

Simplified Block Diagram

MAX16993: Typical Application Circuit MAX16993: Typical Application 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.