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ASIL-D Compliant Dual 1A Low-Voltage Buck Converter

Only ASIL-D PMIC That Enables ASIL-D Functional Safety System in the Qualcomm Snapdragon Ride Platform

Product Details

Key Features

Parametric specs for Step-Down Switching Regulators
VIN (V) (min) 3
VIN (V) (max) 5.5
VOUT1 (V) (min) 0.5
VOUT1 (V) (max) 1.29375
IOUT1 (A) (max) 1
Switch Type Internal
Preset VOUT (V) 0.5 to 1.29375
Output Adjust. Method Preset or Adj
Synchronous Switching? Yes
IQ (mA) (typ) 1.35
# DC-DC Outputs 2
Switching Frequency (kHz) 2100
Design Tools EE-Sim
Package/Pins TQFN-CU/20
Budgetary
Price (See Notes)
0
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Simplified Block Diagram

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Parameters

Parametric specs for Step-Down Switching Regulators
VIN (V) (min) 3
VIN (V) (max) 5.5
VOUT1 (V) (min) 0.5
VOUT1 (V) (max) 1.29375
IOUT1 (A) (max) 1
Switch Type Internal
Preset VOUT (V) 0.5 to 1.29375
Output Adjust. Method Preset or Adj
Synchronous Switching? Yes
IQ (mA) (typ) 1.35
# DC-DC Outputs 2
Switching Frequency (kHz) 2100
Design Tools generateDesignEESIMUrl('http://maxim.transim.com/pwm2/designreq/Index?partId=29573', '')
Package/Pins TQFN-CU/20
Budgetary
Price (See Notes)
0

Key Features

  • High Feature Set in Small Footprint
    • High-Efficiency Dual 1A DC-DC Converters
    • 3.3V Operating Supply Voltage
    • Factory Preset Output Voltage
    • 2.1MHz Switching Frequency
    • Individual Enable Inputs
    • Active-low RESET and active-low INT Open-Drain Outputs
    • Spread-Spectrum Oscillator
    • I2C Interface
    • Peak Current Mode Architecture
    • PWM and SKIP Mode Operation
    • 4mm x 4mm 20-Pin TQFN
  • High-Precision
    • ±1% OV/UV Accuracy
    • ±1% Output Voltage Accuracy
    • Excellent Load Transient Performance
    • MAXQ Power Architecture
  • ASIL-D Compliant
    • Redundant Reference
    • BIST Diagnostics
    • PEC on I2C
    • Programmable OV/UV Thresholds
  • High Efficiency
    • Up to 91% Efficiency 3.3V to 1.8V
    • Up to 85% Efficiency 3.3V to 0.825V
  • -40°C to +125°C Operating Temperature Range
  • AEC-Q100 Qualified

Applications/Uses

  • Secondary Regulator for SoC/MCU Supply

Description

The MAX25320 is a high-efficiency dual switching regulator which delivers up to 1A load current per output from 0.5V to 1.29375V in 6.25mV steps and up to 3.6V in 25mV steps. The IC operates from a 3.3V supply, making it ideal for on-board point-of-load and post regulation applications. Total output error is less than ±1% over load, line, and temperature.

The MAX25320 features fixed-frequency PWM mode or SKIP mode operation with a switching frequency of 2.1MHz. The high-frequency operation allows for an all-ceramic capacitor design and also allows for small-size external components.

The device features the MAXQ™ technology, which provides precision transient performance and phase margin. This allows obtaining the maximum power, performance, and precision from the converter over a very wide range of configurations.

The MAX25320 provides an enable input and output. The output voltage is preset at the factory to allow customers to achieve ±1% output-voltage accuracy without using expensive 0.1% resistors. The device offers factory-programmable soft-start and active-low RESET times.

The device includes over-temperature shutdown and over-current limiting. It is designed to operate from –40°C to +125°C ambient temperature range.

Simplified Block Diagram

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 .