Diodes Incorporated AP61102QZ6-7

Overview

AP61102QZ6-7 from Diodes Incorporated is an AEC-Q100 Grade 1 automotive synchronous buck converter delivering 1A continuous output current with 2.3V–5.5V input range, 0.6V–3.6V programmable output, and integrated 110mΩ/80mΩ MOSFETs. It features a 2.2MHz switching frequency, 15μA quiescent current in PFM mode, and a dedicated open-drain Power-Good (PG) indicator for system monitoring in automotive infotainment and ADAS power rails.

For engineers reviewing the AP61102QZ6-7 datasheet, AP61102QZ6-7 pinout, AP61102QZ6-7 application, or AP61102QZ6-7 equivalent, key selection criteria include its automotive-grade thermal shutdown (+160°C), ±2% reference voltage accuracy, programmable PFM/PWM operation via EN pin, and SOT563 package suitability for space-constrained vehicle ECU designs.

Technical Context

The AP61102QZ6-7 employs Constant On-Time (COT) control architecture to achieve fast transient response without external compensation. Its on-time is dynamically calculated as t_ON = V_OUT/(V_IN × f_SW), enabling pseudo-fixed-frequency operation across input voltage variations while maintaining stable regulation.

It integrates dual protection logic: valley-current limiting (1.9A typical) and peak-current limiting (2.5A typical), plus independent UVLO (1.84V falling threshold) and VIN OVP (6.3V rising threshold) with active discharge. The PG pin provides fault-aware status with 55μs rise delay and 5MΩ internal pull-up.

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 MPQ4420AGQ-AEC1-Z and TPS62095QDGQRQ1, the AP61102QZ6-7 uniquely combines automotive-grade PG signaling, VIN OVP, and valley-current limiting in a 1A/2.2MHz SOT563 solution - optimizing for cost-sensitive, space-constrained 5V bus applications where comprehensive fault coverage is mandatory.

Availability

AP61102QZ6-7 is available at Aetrix Electronics and suitable for automotive infotainment, instrument cluster, telematics, and ADAS camera module designs requiring stable component supply, AEC-Q100 compliance, and long-term lifecycle support.

Supply support for AP61102QZ6-7 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 manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability power management, signal integrity, and protection solutions for automotive, industrial, and consumer markets.

The AP61100Q/AP61102Q product line delivers AEC-Q100 qualified synchronous buck converters optimized for 5V distributed automotive power buses - targeting infotainment, cluster, and ADAS subsystems needing compact, efficient, and fault-resilient DC-DC conversion.

FAQ

What is the function of the PG pin on AP61102QZ6-7?

The PG (Power-Good) pin is an open-drain output that signals valid regulation: it remains low during soft-start and asserts high only when VOUT reaches ≥95% of its target value. It pulls low again if VOUT falls below 90% or rises above 110%, with a 55μs rise delay and internal 5MΩ pull-up to VIN - enabling direct interfacing with microcontroller reset inputs or system supervisors.

How does the EN pin control operation mode?

The EN pin serves dual functions: enabling/disabling the regulator and selecting PFM or PWM mode. When EN voltage exceeds VIN – 200mV, the device operates in PFM for light-load efficiency; when EN is below that threshold, it forces PWM operation regardless of load. Logic thresholds are V_{EN_H} = 0.91V (typ) and V_{EN_L} = 0.83V (typ), with built-in 0.5ms soft-start on enable.

Does AP61102QZ6-7 require external compensation components?

No. The AP61102QZ6-7 uses Constant On-Time (COT) control architecture, which eliminates the need for external compensation networks. Loop stability is inherently achieved through the on-time calculation (t_ON = V_OUT/(V_IN × f_SW)), allowing stable operation with standard ceramic output capacitors and no feedback capacitor or resistor network beyond the FB divider.

What protection features are integrated into AP61102QZ6-7?

The device integrates six protection mechanisms: undervoltage lockout (UVLO, 1.84V falling), VIN overvoltage protection (OVP, 6.3V rising), cycle-by-cycle peak current limit (2.5A typ), valley current limit (1.9A typ), thermal shutdown (+160°C), and active output discharge (1kΩ path to GND during fault). All protections trigger automatic recovery upon fault clearance.