High Voltage Step-Down Regulator

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Manufacturer Skyworks


Description :

The AAT1189 is a single output step-down (Buck) DC output regulator with an integrated high side MOSFET. The input range is 6V to 24V making it the ideal power IC solution for consumer communications equipment operating from a low cost AC/DC adapter with 12V output. The step-down regulator provides up to 2.5A output current in a small package. 490kHz fixed switching frequency allows small L/C filtering components. Voltage mode control allows for optimum performance across the entire output voltage and load range. The controller includes programmable over-current, integrated soft-start and over-temperature protection. The AAT1189 is available in the Pb-free, low profile 16-pin TDFN34 package. The rated operating temperature range is -40°C to 85°C.

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  • Quote and availability


    • VIN = 6.0 to 24.0V
    • VOUT Adjustable from 1.5V to 5.5V
    • IOUT up to 2.5A
    • Small Solution Size
    • Low-Cost Non-Synchronous Solution
    • Shutdown Current <35μA
    • High Switching Frequency
    • Voltage Mode Control
    • PWM Fixed Frequency for Lowest Noise
    • Programmable Over-Current Protection
    • Over-Temperature Protection
    • Internal Soft Start
    • Low Profile 3x4mm TDFN-16 Packages
    • -40°C to 85°C Temperature Range

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Features Similar products
Control scheme Constant Frequency Voltage Mode Control  

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Switching frequency (kHz) 490  
Max Input Voltage (V) 6 to 24  
Output Voltage (V) 1.5 to 5.5  
Typ. Active Current (µA) 600  
Typ. Output Voltage Accuracy (%) ± 2.5  
Output Capacitor Type Two 22 μF, Ceramic Capacitors  
Output Current (mA) 2500  
Operating Temperature (°C) -40 to +85  
Package TDFN34-16