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Automotive 40V, 55µA IQ, 2.2MHz, H-Bridge Buck-Boost Controller

Industry's Lowest IQ Buck-Boost Controller with Best in Class Transient Response

Product Details

The MAX20048 is a current‐mode buck‐boost controller. The device operates with input voltages from 4.5V to 36V while using only 55µA quiescent current at no load. Once the start‐up conditions are satisfied, the device can operate over an extended input voltage range of 2V to 36V. The switching frequency is resistor programmable from 220kHz to 2.2MHz and can be synchronized to an external clock.

The device output voltage is available as 5V fixed or adjustable from 4V to 25V. The wide input voltage range, along with its ability to maintain constant output voltage during battery transients, makes the device ideal for automotive applications. In light load applications, a logic input (FSYNC) allows the devices to operate either in skip mode for reduced current consumption, or fixed‐frequency, forced‐ PWM mode to eliminate frequency variation and help minimize EMI. Protection features include cycle‐by‐cycle current limit, and thermal shutdown with automatic recovery.

The MAX20048 is available in a small 4mm x 4mm 24-pin TQFN-EP SW package.

Key Features

  • Meets Stringent Automotive Quality and Reliability Requirements
    • Operating VIN Range: 2V to 36V Allows Operation in Cold-Crank Conditions
    • Tolerates Input Transients to 40V
    • EN Pin Compatible from +3.3V to +40V
    • -40°C to +125°C Automotive Temperature Range
    • AEC-Q100 Qualified
  • Efficient Solution in a Small Solutions Size
    • Skip Mode for Efficient Low Power Operation
    • Fixed 5V Output Voltage and Adjustable 4V to 25V
    • High Switching Frequency Allows Use of Small External Components
    • Small 4mm x 4mm 24-Pin SWTQFN Package
  • Low Quiescent Current Helps Designers Meet Stringent OEM Current Requirements
    • 55µA Quiescent Current When in Stand-By Mode
    • 10µA (max) Quiescent Current in Shutdown
  • EMI Mitigation to meet CISPR25 Class 5 Requirements
    • 220kHz to 2.2MHz Operating Frequency
    • Fixed-Frequency PWM Mode
    • External Frequency Synchronization or SYNC OUT Capability (Selectable by OTP Option)
    • Spread Spectrum Can Be Enabled or Disabled for the IC by OTP Option

Applications/Uses

  • Instrument Cluster
  • Point of Load Power Supply
  • Remote Display
  • Start-Stop Systems
  • USB Power
Parametric specs for Step-Down/Up Switching Regulators
VIN (V) (min) 2
VIN (V) (max) 40
VOUT1 (V) (min) 4
VOUT1 (V) (max) 25
IOUT1 (A) (max) 25
Switch Type External
Preset VOUT (V) 5
VOUT1 Tolerance (±%) 2
Output Adjust. Method Preset
Resistor
Synchronous Switching? Yes
Power Good Signal Yes
ICC (mA) (max) 0.55
# DC-DC Outputs 1
Alternate Topology Step-Down
Step-Up
Switching Frequency (kHz) 300
400
500
1000
2200
2500
Design Tools EE-Sim
Package/Pins TQFN-CU/24
Oper. Temp. (°C) -40 to +85
-40 to +125
Budgetary
Price (See Notes)
$3.28 @1k
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Simplified Block Diagram

MAX20048: Functional Diagram MAX20048: Functional Diagram Zoom icon

Technical Docs

Design & Development

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Description

The MAX20048 evaluation kit (EV kit) is a fully assembled and tested application circuit for the MAX20048 currentmode buck-boost controller IC. The EV kit is designed to deliver up to 16A (max) input current with input voltages from 2V to 36V. The output-voltage accuracy is ±2% within the normal 9V to 18V operation input range and a ±3% accuracy in the 2V to 18V range. Voltage quality can be monitored by observing the PGOOD signal.

The IC offers 5V fixed output voltage and a 4V to 25V OUT programmable range. Switching frequency is adjustable from 220kHz to 2.2MHz, which allows for small external components, reduced output ripple, and guarantees no AM interference. The IC automatically enters skip mode at light loads with low 55μA quiescent current at no load. The IC comes with a spread-spectrum frequency-modulation option designed to minimize EMI-radiated emissions and a SYNCOUT option that outputs 180° out-of-phase clock.

View Details

Features

  • 2V to 36V Input Supply Range
  • Delivers Up to 16A Input Current
  • Enable Input
  • Frequency Synchronization Input
  • Voltage-Monitoring PGOOD Output
  • BIAS Voltage-Monitoring Test Point
  • Fully Assembled and Tested
  • Proven PCB Layout

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Tools & Models

EE-Sim: Design & Simulate MAX20048

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Parameters

Parametric specs for Step-Down/Up Switching Regulators
VIN (V) (min) 2
VIN (V) (max) 40
VOUT1 (V) (min) 4
VOUT1 (V) (max) 25
IOUT1 (A) (max) 25
Switch Type External
Preset VOUT (V) 5
VOUT1 Tolerance (±%) 2
Output Adjust. Method Preset
Resistor
Synchronous Switching? Yes
Power Good Signal Yes
ICC (mA) (max) 0.55
# DC-DC Outputs 1
Alternate Topology Step-Down
Step-Up
Switching Frequency (kHz) 300
400
500
1000
2200
2500
Design Tools EE-Sim
Package/Pins TQFN-CU/24
Oper. Temp. (°C) -40 to +85
-40 to +125
Budgetary
Price (See Notes)
$3.28 @1k

Key Features

  • Meets Stringent Automotive Quality and Reliability Requirements
    • Operating VIN Range: 2V to 36V Allows Operation in Cold-Crank Conditions
    • Tolerates Input Transients to 40V
    • EN Pin Compatible from +3.3V to +40V
    • -40°C to +125°C Automotive Temperature Range
    • AEC-Q100 Qualified
  • Efficient Solution in a Small Solutions Size
    • Skip Mode for Efficient Low Power Operation
    • Fixed 5V Output Voltage and Adjustable 4V to 25V
    • High Switching Frequency Allows Use of Small External Components
    • Small 4mm x 4mm 24-Pin SWTQFN Package
  • Low Quiescent Current Helps Designers Meet Stringent OEM Current Requirements
    • 55µA Quiescent Current When in Stand-By Mode
    • 10µA (max) Quiescent Current in Shutdown
  • EMI Mitigation to meet CISPR25 Class 5 Requirements
    • 220kHz to 2.2MHz Operating Frequency
    • Fixed-Frequency PWM Mode
    • External Frequency Synchronization or SYNC OUT Capability (Selectable by OTP Option)
    • Spread Spectrum Can Be Enabled or Disabled for the IC by OTP Option

Applications/Uses

  • Instrument Cluster
  • Point of Load Power Supply
  • Remote Display
  • Start-Stop Systems
  • USB Power

Description

The MAX20048 is a current‐mode buck‐boost controller. The device operates with input voltages from 4.5V to 36V while using only 55µA quiescent current at no load. Once the start‐up conditions are satisfied, the device can operate over an extended input voltage range of 2V to 36V. The switching frequency is resistor programmable from 220kHz to 2.2MHz and can be synchronized to an external clock.

The device output voltage is available as 5V fixed or adjustable from 4V to 25V. The wide input voltage range, along with its ability to maintain constant output voltage during battery transients, makes the device ideal for automotive applications. In light load applications, a logic input (FSYNC) allows the devices to operate either in skip mode for reduced current consumption, or fixed‐frequency, forced‐ PWM mode to eliminate frequency variation and help minimize EMI. Protection features include cycle‐by‐cycle current limit, and thermal shutdown with automatic recovery.

The MAX20048 is available in a small 4mm x 4mm 24-pin TQFN-EP SW package.

Simplified Block Diagram

MAX20048: Functional Diagram MAX20048: 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