Diodes Incorporated AP61300Z6-7

Overview

AP61300Z6-7 from Diodes Incorporated is a 3A synchronous buck converter with integrated 70mΩ high-side and 50mΩ low-side MOSFETs, operating from 2.4V to 5.5V input and delivering 0.6V–3.6V output. It uses Constant On-Time (COT) control for fast transient response, achieves 2.2MHz switching frequency at 5V/1.8V, and delivers up to 84% efficiency at 5mA light load. It serves as a compact, high-efficiency point-of-load regulator in FPGA/DSP power supplies and network cameras.

For engineers reviewing the AP61300Z6-7 datasheet, AP61300Z6-7 pinout, AP61300Z6-7 application, or AP61300Z6-7 equivalent, key selection criteria include its 19μA PFM quiescent current, programmable PFM/PWM mode via EN pin voltage threshold, integrated PG indicator (AP61302 variant), and SOT563 thermal performance (θJA = 141°C/W).

Technical Context

The AP61300Z6-7 implements Constant On-Time (COT) control with input-voltage–dependent on-time calculation (t_ON = V_OUT/(V_IN × f_SW)), enabling pseudo-fixed-frequency operation across input range and eliminating external compensation. Its minimum off-time is 70ns typical, supporting stable regulation down to 0.6V output with ±2% reference accuracy.

It integrates protection features including undervoltage lockout (UVLO falling at 2.2V), VIN overvoltage protection (OVP rising at 6.3V), peak/valley current limiting (5.5A/3.2A), and thermal shutdown at +160°C with +30°C hysteresis - all implemented without external components.

Key Specifications

Pinout & Package

SOT563 package: 1.6mm × 1.6mm × 0.55mm body, 0.5mm pitch, thermally enhanced pad, RoHS-compliant and halogen-free.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar synchronous buck converter applications.

Compared with MP2143GJ-Z, AP61300Z6-7 offers superior light-load efficiency and integrated PG; compared with TPS6286518RRLR, it provides identical switching frequency and lower cost in a smaller SOT563 package, albeit with 1A less current headroom.

Availability

AP61300Z6-7 is available at Aetrix Electronics and suitable for FPGA power supplies, network video cameras, and wireless router designs requiring stable component supply, consistent parametric performance, and long-term production continuity.

Supply support for AP61300Z6-7 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 semiconductor company specializing in discrete, analog, and mixed-signal ICs, with emphasis on power management, signal integrity, and protection solutions.

The AP61300/AP61302 product line targets space-constrained, high-efficiency point-of-load applications in consumer, industrial, and networking equipment - prioritizing low IQ, fast transient response, and minimal external component count.

FAQ

What is the difference between AP61300Z6-7 and AP61302?

AP61300Z6-7 is the AP61300 variant with OUT pin (pin 6) as output power rail; AP61302 replaces OUT with open-drain Power-Good (PG) output. Both share identical electrical specs, pinout except pin 6, and SOT563 packaging. AP61300Z6-7 is selected when direct output connection is required; AP61302 is used when system-level power sequencing or fault monitoring is needed.

How is PFM vs. PWM mode selected on AP61300Z6-7?

Mode selection is controlled by EN pin voltage relative to VIN: if V_EN > V_VIN – 200mV, the device operates in PFM for lowest IQ; if V_EN < V_VIN – 200mV, it forces PWM regardless of load. This is implemented using an external resistive divider from VIN to EN, not a fixed logic level - enabling seamless transition between modes without additional control signals.

Does AP61300Z6-7 require external compensation components?

No. The AP61300Z6-7 uses Constant On-Time (COT) control architecture, which inherently stabilizes the control loop without external compensation networks. Only two external components are mandatory: input capacitor (≥22µF) and output LC filter (1μH inductor + 22µF capacitor). Feedback resistors are required for adjustable VOUT but serve only scaling, not compensation.

What thermal derating applies to AP61300Z6-7 in SOT563 package?

With θ_JA = 141°C/W on standard 2-layer FR-4 (2oz copper), AP61300Z6-7 delivers full 3A output up to +85°C ambient. At +70°C ambient, junction temperature remains below +125°C (T_J = 70 + 3A²×0.12Ω×141 ≈ 112°C). For continuous 3A at +85°C, minimum recommended PCB copper area is 100mm² under the thermal pad per Diodes' layout guidelines.