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Description

The AP1509 series are monolithic IC designed for a step-down DC/DC converter, and own the ability of driving a 2A load without additional transistor. It saves board space. The external shutdown function can be control°C by logic level and then come into standby mode. The internal compensation makes feedback control having good line and load regulation without external design. Regarding protected function, thermal shutdown is to prevent over temperature operating from damage, and current limit is against over current operating of the output switch. If current limit function occurs and VFB is down below 0.5V, the switching frequency will be reduced. The AP1509 series operates at a switching frequency of 150KHz thus allow smaller sized filter components than what would be needed with lower frequency switching regulators. Other features include a guaranteed +4% tolerance on output voltage under specified input voltage and output load conditions, and +15% on the oscillator frequency. The output version included fixed 3.3V, 5V, 12V, and an adjustable type. The chips are available in a standard 8-lead SO-8 package.

Application

  • Simple High-Efficiency Step-Down Regulator
  • On-Card Switching Regulators
  • Positive to Negative Converter

Product Specifications

Product Parameters

Type Buck
Efficiency 90 %
HS RDS(ON) N/A mΩ
LS RDS(ON) N/A mΩ
Frequency Typ 150 kHz
Minimum Input Voltage 4.5 V
Maximum Input Voltage 22 V
Output Current 2 A
Output Voltage 12, 5, 3.3, 1.23 to 18 V
Quiescent Current Typ 5 mA
Shutdown Current Typ 70 µA

Related Content

Packages
SO-8

Technical Documents

Application Notes

Evaluation Board User Guides

Recommended Soldering Techniques

TN1.pdf

RoHS CofC

Orderable Part Number Authorized Distributor Quantity Inventory Date Buy Online Countries/Regions
AP1509-12SG-13 Mouser Electronics Inc. 2416 10/25/2020 Buy Now South America, North America, Asia, Europe, Middle East
AP1509-12SG-13 Digi-Key Electronics 142 10/24/2020 Buy Now Europe, Asia, North America
AP1509-33SG-13 Arrow Electronics 8741 10/25/2020 Buy Now United States
AP1509-33SG-13 Arrow Electronics Central EU 2500 10/25/2020 Buy Now Europe
AP1509-33SG-13 Mouser Electronics Inc. 2655 10/25/2020 Buy Now South America, North America, Asia, Europe, Middle East
AP1509-33SG-13 Digi-Key Electronics 3060 10/24/2020 Buy Now Europe, Asia, North America
AP1509-33SG-13 Farnell, An Avnet Company 1412 10/24/2020 Buy Now England
AP1509-33SG-13 RS Components 35 10/24/2020 Buy Now England
AP1509-33SG-13 RS Components Ltd. 35 10/24/2020 Buy Now Japan
AP1509-50SG-13 Arrow Electronics 322 10/25/2020 Buy Now United States
AP1509-50SG-13 Mouser Electronics Inc. 3597 10/25/2020 Buy Now South America, North America, Asia, Europe, Middle East
AP1509-50SG-13 Digi-Key Electronics 8624 10/24/2020 Buy Now Europe, Asia, North America
AP1509-50SG-13 Farnell, An Avnet Company 3199 10/24/2020 Buy Now England
AP1509-50SG-13 RS Components 80 10/24/2020 Buy Now England
AP1509-50SG-13 RS Components Ltd. 80 10/24/2020 Buy Now Japan
AP1509-SG-13 Arrow Electronics Central EU 2500 10/25/2020 Buy Now Europe
AP1509-SG-13 Mouser Electronics Inc. 1469 10/25/2020 Buy Now South America, North America, Asia, Europe, Middle East
AP1509-SG-13 Digi-Key Electronics 4290 10/24/2020 Buy Now Europe, Asia, North America
AP1509-SG-13 Farnell, An Avnet Company 2175 10/24/2020 Buy Now England
AP1509-SG-13 RS Components 4825 10/24/2020 Buy Now England
AP1509-SG-13 RS Components Ltd. 4795 10/24/2020 Buy Now Japan

PCNs

Product Change Notices

PCN # Issue Date Implementation Date Subject
PCN-2427 2019-10-15 2020-04-15 Device End of Life (EOL)