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Numéro de sérieAAT1130
CategoriePower Management => DC-DC Converters => Step-down
Description2.5MHz 500mA Step-Down DC/DC Converter
The AAT1130 SwitchReg™ is a member of AnalogicTech’s Total Power Management IC™ product family. It is a fixed-frequency (during steady-state operation), current- mode step-down converter. The unique architecture improves transient response while allowing tiny passive LC filter components. The high switching frequency (up to 2.5MHz) keeps output voltage ripple low.
SociétéAnalogic Corporation
DatasheetTélécharger AAT1130 datasheet
 
 
  • Description courte

  • The AAT1130 SwitchRegTM is a member of AnalogicTech's Total Power Management ICTM product family. is a fixed-frequency (during steady-state operation), current-mode step-down converter. The unique architecture improves transient response while allowing tiny passive LC filter components. The high switching frequency (up to 2.5MHz) keeps output voltage ripple low. The AAT1130 delivers 500mA of output current, while consuming only 60A of quiescent current. The current-mode control circuit operates at a fixed switching frequency in steady-state operation. It allows the control circuit to react nearly instantly for improved transient response and is stable with LC components as small as 1H and 4.7F. The AAT1130 regulates an output voltage between 0.6V and 1.8V from an input voltage to 5.5V. The AAT1130 is available in either fixed or adjustable output regulation voltage options, for the adjustable version the output voltage is set by an external resistor voltage divider circuit. Internal MOSFET switches reduce the overall solution size while maintaining high efficiency over a wide load current range. The AAT1130 is available in a space-saving 2.0x2.2mm SC70JW-10 package a 6-pin wafer-level chip scale (WLCSP) package, and is rated over the to 85°C temperature range.

    Features

    · 2.5MHz Switching Frequency Input Voltage Range: to 5.5V Output Voltage Range: to 1.8V High 92% Peak Efficiency (VIN = 3.6V, VOUT = 1.8V) Low 60A Quiescent Current 500mA Maximum Continuous Output Current Fast Transient Response with Small LC Output Filter Components Fixed and Adjustable Output Voltage Options Internal Soft-Start Anti-Ringing Switch to Reduce EMI During Discontinuous Conduction Mode Operation Over-Temperature Protection Valley Current Limit Protection or 0.9x1.2mm WLCSP Package to 85°C Temperature Range

    Applications

    · Microprocessor/DSP Core and I/O Mobile Phones PDAs and Handheld Computers Digital Cameras Portable Music Players Handheld Games Handheld Instruments

    Output voltage feedback input. FB senses the output voltage through a resistor voltage divider circuit. Connect the voltage divider from the output voltage to FB. The feedback threshold is 0.6V. (Adjustable output voltage versions only) Output voltage feedback input. VOUT senses the output voltage. Connect VOUT to the output voltage node to regulate the output voltage. Input supply voltage. Connect VCC to the input supply voltage. Power input supply voltage. Connect VP to the VCC pin, and to the input supply voltage. Bypass VP to PGND with 2.2F or greater capacitor. Switching node. Connect the LC filter between LX and the load. LX is internally connected to the drain of the p-channel MOSFET switch and n-channel MOSFET synchronous rectifier. Enable input. Active logic high. Power ground. Connect PGND to GND at a single point as close to the AAT1130 as possible. Ground. For fixed version, connect GND to PGND at a single point as close to the AAT1130-xx as possible.

    SC70JW-10 (Top View) Adjustable Output Voltage Version Fixed Output Voltage Version

    Description

    VCC, VP to GND LX Voltage to PGND FB Voltage to GND EN Voltage to GND PGND Voltage to GND Operating Junction Temperature Range Maximum Soldering Temperature (at leads, 10 sec)

    1. Stresses above those listed in Absolute Maximum Ratings may cause permanent damage to the device. Functional operation at conditions other than the operating conditions specified is not implied. Only one Absolute Maximum Rating should be applied at any one time. 2. Mounted a FR4 board.