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APU3039-HF-3

Advanced Power Electronics
Part Number APU3039-HF-3
Manufacturer Advanced Power Electronics
Description Synchronous PWM Controller
Published Sep 27, 2014
Detailed Description Advanced Power Electronics Corp. Technology Licensed from International Rectifier APU3039-HF-3 Synchronous PWM Contro...
Datasheet PDF File APU3039-HF-3 PDF File

APU3039-HF-3
APU3039-HF-3

Overview
Advanced Power Electronics Corp.
Technology Licensed from International Rectifier APU3039-HF-3 Synchronous PWM Controller with Over-Current Protection Features Current Limit using Lower MOSFET Sensing Using the 6V internal regulator for charge pump circuit allows single supply operation up to 18V Programmable Switching Frequency up to 400KHz Soft-Start Function 0.
8V Precision Reference Voltage Available Uncommitted Error Amplifier Available for DDR Voltage Tracking Applications Stable with Ceramic Capacitor RoHS-compliant, halogen-free packages Description The APU3039 controller IC is designed to provide a synchronous Buck regulator and is targeted for applications where cost and size are critical.
The APU3039 operates with a single input supply up to 18V, and the output voltage can be programmed as low as 0.
8V for low voltage applications.
Selectable current limit is provided to tailor to external MOSFET’s on-resistance for optimum cost and performance.
The APU3039 features an uncommitted error amplifier for tracking output voltage and is capable of sourcing or sinking current for applications such as DDR bus termination.
This device features a programmable switching frequency set from 200KHz to 400KHz, under-voltage lockout for both Vcc and Vc supplies, an external programmable soft-start function as well as output under-voltage detection that latches off the device when an output short is detected.
Applications DDR Memory VDDQ/VTT Applications Graphic Card Hard Disk Drive Netcom on-board DC to DC regulator application Output voltage as low as 0.
8V Low Cost On-Board DC to DC Typical Application 18V D1 C3 1uF C9 1uF C2 3x 15uF 25V C4 1uF C5 0.
1uF Q1 AP9408AGH-3 L2 4.
7uH Q2 AP9412AGH-3 R3 3.
3V @ 8A C6 2x 330uF 40mΩ L1 1uH C1 15uF Vcc C7 0.
1uF VOUT2 Vc SS / SD U1 HDrv APU3039-3 VP VREF Rt Comp OCSet LDrv Fb D2 R2 5.
76K C11 Optional C8 5600pF R1 14K Gnd PGnd R4 1K 3.
16K Figure 1 - Typical application of APU3039-3 ©2009 Advanced Power Electronics Co...


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