The MAX16920AATJ/V+ power-management IC integrates three high-voltage step-down DC-DC converters, one high-voltage linear regulator, and an overvoltage protection block. The three step-down converters deliver up to 150mA, 600mA, and 1.5A, while the linear regulator is capable of up to 150mA. The MAX16920AATJ/V+ is designed to operate with input voltages between 5.5V to 28V and survive voltage transients to 45V, making it ideal for automotive applications. The MAX16920AATJ/V+ is optimized for high efficiency and low standby current. The MAX16920A features 400kHz switching frequency, while the MAX16920B features 2MHz switching frequency. The MAX16920AATJ/V+ can be ordered with spread-spectrum frequency modulation. The DC-DC converters can also be synchronized to an external frequency reference using the SYNC input minimize EMI. The MAX16920AATJ/V+ includes power-good outputs (PG_) for DC-DC2, DC-DC3, LDOA, and a power-on reset (active-low POR) for DC-DC1. All regulators other than DC-DC1 have an enable input (EN_). DC-DC1 always operates when power is applied to the MAX16920. The MAX16920AATJ/V+ operates over the -40°C to +125°C temperature range, and is available in a compact, thermally enhanced 32-pin TQFN package (7mm x 7mm).
Feature
- 5.5V to 28V Wide Operating Voltage Range
- Tolerates Input Voltage Transients Up to 45V
- Three High-Voltage Buck Converters with High Efficiency
- DC-DC1: 150mA (max), Always-On, Ultra-Low Quiescent Current (25μA)
- 3.3V Fixed or Adjustable from 1.22V to 5V
- DC-DC2: 600mA (max), 5.0V Fixed or Adjustable Output Voltage from 1.22V to 5V
- DC-DC3: 1.5A (max), 3.3V Fixed or Adjustable from 1.22V to 8.0V
- One High-Voltage 5V Linear Regulator (150mA)
- pMOS Driver Output with Fixed Overvoltage Shutdown
- 400kHz (MAX16920A) or 2.2MHz (MAX16920B) Switching Frequency
- Frequency Synchronization Input
- Open-Drain Power-Good Outputs for DC-DC2, DC-DC3, LDOA, and Power-On Reset for DC-DC1
- Enable Inputs for DC-DC2, DC-DC3, and LDO
- Internal Soft-Start
- ±2% Undervoltage Comparator
- Overtemperature Shutdown
- -40°C to +125°C Operating Temperature Range
- Compact 32-Pin TQFN Package (7mm x 7mm)
Applications
- Automotive Navigation Systems
- Automotive Radios
