MAX16922

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

Four Automotive Converters in a 5mm x 5mm Package


Please check latest availability status for a specific part variant.

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.

MAX16922: Functional Diagram MAX16922: Functional Diagram Enlarge+

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

See parametric specs for Step-Down Switching Regulators (405)


Part NumberVIN
(V)
VIN
(V)
VOUT1
(V)
VOUT1
(V)
Preset VOUT
(V)
Output Adjust. MethodIOUT1
(A)
Switch TypeSynchronous SwitchingDC-DC OutputsOper. Freq.
(kHz)
Package/PinsBudgetary
Price
minmaxminmaxmaxSee Notes
MAX16922 3.7283550mV stepsPreset1.2InternalYes22200
TQFN/20
TSSOP/20
$5.55 @1k

Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

MAX16922EVKIT: Evaluation Kit for the MAX16922
Request Reliability Report for: MAX16922 
Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C   Material Composition  

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

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