Diodes Incorporated AP5004SG-13

Overview

AP5004SG-13 from Diodes Incorporated is a synchronous step-down DC-DC converter IC with integrated 80 mΩ N-channel MOSFET, 300 kHz fixed-frequency PWM control, 10–32 V input range, 0.8–6 V adjustable output, and 2.5 A continuous output current in SOP-8L package. It delivers high efficiency (>90% at 12 V_IN/5 V_OUT/2.5 A), low standby current (2 µA), and built-in protection including over-current, short-circuit, thermal shutdown, and enable control - used in telecom power supplies and LCD TV main rails.

For engineers reviewing the AP5004SG-13 datasheet, AP5004SG-13 pinout, AP5004SG-13 application, or AP5004SG-13 equivalent, key selection criteria include its 32 V max input rating, internal MOSFET R_DS(ON), 50 kHz fault-reduction frequency mode, FB voltage accuracy (±2.5% over temp), and SOP-8L thermal resistance (θ_JA = 124 °C/W).

Technical Context

The AP5004SG-13 implements a fixed-frequency, current-mode PWM controller with internal oscillator (300 kHz typical), error amplifier, reference voltage (0.8 V ±2.5%), and gate driver for its integrated high-side NMOS switch. Duty cycle is linearly adjustable from 0% to 90% via feedback loop.

Under over-current or short-circuit conditions, it autonomously reduces switching frequency from 300 kHz to 50 kHz while maintaining regulation, enabling robust fault handling without external circuitry. Internal compensation minimizes external components, requiring only inductor, output capacitor, bootstrap capacitor, and two feedback resistors.

Key Specifications

Pinout & Package

SOP-8L package with exposed thermal pad (pins 7 & 8 tied to GND internally); dual GND and dual VCC pins reduce PCB trace inductance and improve thermal dissipation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar step-down converter applications.

Compared with MP2451DT-LF-Z and LM2678SX-5.0/NOPB, the AP5004SG-13 offers integrated switching FET, adjustable output, enable control, and lower quiescent current - making it optimal for space-constrained, programmable, and low-power-standby applications where 2.5 A suffices.

Availability

AP5004SG-13 is available at Aetrix Electronics and suitable for telecom power supplies, LCD monitor main rails, networking equipment power modules, and industrial embedded controllers requiring stable component supply with long lifecycle visibility.

Supply support for AP5004SG-13 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design centers across Asia and manufacturing in China, Taiwan, and Malaysia.

The AP5004 belongs to Diodes' Power Management IC product line, engineered for high-efficiency, integrated buck conversion in cost-sensitive, thermally constrained applications such as consumer displays and communications infrastructure.

FAQ

What is the maximum allowable input voltage for AP5004SG-13?

The absolute maximum input voltage applied to the VCC pin is 35 V, but the recommended operating range is 10 V to 32 V per the datasheet's Recommended Operating Conditions table. Exceeding 32 V may trigger overvoltage stress on internal circuitry despite the 35 V absolute rating, and sustained operation above 32 V voids guaranteed performance and reliability specifications.

How does the AP5004SG-13 handle short-circuit conditions?

During a short-circuit event, the AP5004SG-13 detects over-current via internal sensing, reduces switching frequency from 300 kHz to 50 kHz, and maintains regulation at reduced duty cycle. This limits average power dissipation and prevents thermal runaway while sustaining output voltage within specification until fault clearance - confirmed by oscilloscope waveforms in DS31444 Rev. 5-2 page 6.

Can the AP5004SG-13 be used without an external bootstrap capacitor?

No - the Vboost pin (Pin 3) must be connected to a 0.1 µF ceramic capacitor between itself and the Output pin (Pin 4). This capacitor provides gate-drive voltage boost above VIN to fully enhance the internal NMOS switch; omission causes insufficient gate drive, increased R_DS(ON), thermal failure, and regulation loss per Functional Description section on page 8.

What is the thermal performance limit for continuous 2.5 A operation?

At 2.5 A output, 12 V input, and 5 V output, the AP5004SG-13 dissipates ~1.25 W. With θ_JA = 124 °C/W and 25 °C ambient, junction temperature reaches ~155 °C - exceeding the 125 °C max rating. Therefore, continuous 2.5 A operation requires ≥2 oz copper thermal pad, minimal trace length, and ambient ≤50 °C, as validated in the Thermal Resistance note on page 4.