AP3591数据手册集成电路（IC）的PMIC-稳压器-DCDC开关式控制器规格书PDF

描述 Description

The AP3591 is a synchronous adaptive on-time buck controller providing high efficiency, excellent transient response and high DC output accuracy for low voltage regulation in notebook application.

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\tThe constant-on-time PWM control scheme handles wide input/output voltage ratios with ease and features small external component count and fast transient response.

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\tThe operation mode is selectable by EN voltage. A Diode Emulation Mode (DEM) is activated for increasing efficiency at light loads, while PWM mode is activated only for low noise operation. The AP3591 also integrates internal Soft-start, UVLO, OVP, OTP, and programmable OCP to protect the circuit. A Power Good signal is employed to monitor the output voltage.

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\tThe AP3591 is available in U-QFN3535-14 package.

特性 Features

Fixed Frequency Constant On-time Control; Resistor Programmable Frequency Adjustable from 100kHz to 700kHz
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\t\tGood Stability Independent of the Output Capacitor ESR
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\t\tQuick Load Step Response
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\t\tInput Voltage Range: 4.5V to 26V
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\t\tOutput Voltage Range: 0.75V to 5.5V
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\t\tCCM/DEM Mode Selection
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\t\tIntegrated Bootstrap Diode
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\t\tResistor Programmable Current Limit by Low-side RDSON Sense
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\t\tIntegrated Negative Over Current Limit
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\t\tIntegrated OVP/UVP and Over Thermal Shutdown Function
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\t\tPower Good Indicator
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\t\tInternal Soft-start
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\t\tIntegrate Output Discharge (Soft-stop)
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\t\tSafe Start-up into Pre-biased Loads
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\t\tTotally Lead-Free & Fully RoHS Compliant 
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\t\tHalogen and Antimony Free. “Green” Device

应用 Application

Notebook Computer, AIO PC
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\t\tLow-voltage Distribute Power
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\t\tI/O Supplies