Diodes Incorporated — Analog and discrete power solutions
SO 8

Image shown is for reference only. Actual package may vary. Refer to the product data sheet for package details. SO-8

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AP1509

150kHz, 2A PWM BUCK DC-DC CONVERTER

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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(s)

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

Specifications & Technical Documents

Product Parameters

Compliance (Only Automotive Supports PPAP) Standard
Type Buck
HS RDS(ON) (mΩ) N/A
LS RDS(ON) (mΩ) N/A
MaximumInput Voltage (V) 22
MinimumInput Voltage (V) 4.5
Quiescent Current Typ (μA) 5000
Shutdown Current Typ (µA) 70
Output Current (A) 2 A
Minimum Output Voltage (V) 1.23
Maximum Output Voltage (V) 18
Frequency Typ (kHz) 150

Related Content

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Technical Documents

Application Notes

Evaluation Boards and User Guides

Recommended Soldering Techniques

TN1.pdf

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