1MHz 1.2A Step-Down DC/DC Converter

Manufacturer's part number :


NATO number :


Manufacturer Skyworks


Description :

The AAT1157 SwitchReg™ is a member of AnalogicTech's Total Power Management IC™ (TPMIC™) product family. The step-down switching converter is ideal for applications where fixed frequency and low ripple are required over the full range of load conditions. The 2.7V to 5.5V input voltage range makes the AAT1157 ideal for single cell lithium-ion/polymer battery applications. Capable of up to 1.2A with internal MOSFETs, the current-mode controlled IC provides high efficiency over a wide operating range. Fully integrated compensation simplifies system design and lowers external parts count. The device operates at a fixed 1MHz switching frequency across all load conditions. The AAT1157 is available in the Pb-free, 16-pin 3x3mm QFN package and is rated over the -40°C to +85°C temperature range.

View our wide range of Analogue / Mixed signal products

View our portfolio of Semiconductors

See all products from our supplier Skyworks



  • Quote and availability


    • VIN Range: 2.7V to 5.5V
    • Up to 95% Efficiency
    • 110 m RDS(ON) Internal Switches
    • <1μA Shutdown Current
    • 1MHz Buck Switching Frequency
    • Fixed or Adjustable VOUT ≥ 0.8V
    • Integrated Power Switches
    • Current Mode Operation
    • Internal Compensation
    • Stable with Ceramic Capacitors
    • Constant PWM Operation for Low Output Ripple
    • Internal Soft Start
    • Over-Temperature Protection
    • Current Limit Protection
    • 16-Pin QFN 3x3mm Package
    • -40°C to +85°C Temperature Range

    How wireless works

Features Similar products
Control scheme Internally Compensated Current Mode Control  

  similar products found

Search similar products
Switching frequency (kHz) 1000  
Max Input Voltage (V) 2.7 to 5.5  
Output Voltage (V) 0.8 Min  
Typ. Active Current (µA) 160  
Output Capacitor Type X5R or X7R Ceramic Capacitor  
Output Current (mA) 1200  
Operating Temperature (°C) -40 to +85  
Package QFN33-16