Diodes Incorporated AP7354D-12W5-7

Overview

AP7354D-12W5-7 from Diodes Incorporated is a 150mA ultra-low quiescent current LDO regulator with fixed 1.2V output, ±1% accuracy at +25°C, 0.25µA quiescent current, and integrated active output discharge - delivered in SOT25 package for wearable electronics and IoT sensor modules.

For engineers reviewing the AP7354D-12W5-7 datasheet, AP7354D-12W5-7 pinout, AP7354D-12W5-7 application, or AP7354D-12W5-7 equivalent, key selection criteria include dropout voltage at 150mA (0.60V typ), EN pin logic thresholds (0.4V low / 1.0V high), thermal resistance (162°C/W), and discharge resistance (35Ω) - all critical for battery runtime and power sequencing integrity.

Technical Context

The AP7354D-12W5-7 integrates a precision voltage reference, error amplifier, current-limit circuit, and enable control logic to regulate output within ±1% over temperature and load. Its architecture supports stable operation with 0.1µF ceramic input/output capacitors and delivers 150mA while maintaining ultra-low ground current.

Unlike non-discharge variants (e.g., AP7354-12W5-7), the "D" suffix denotes built-in active output discharge via an internal NMOS switch (35Ω typical) that rapidly pulls VOUT to GND when EN is low - eliminating residual voltage hold-up in power-gated subsystems.

Key Specifications

Pinout & Package

SOT25 package: 5-pin surface-mount plastic package with exposed pad not connected; dimensions 2.80 × 2.90 × 1.10 mm; RoHS-compliant matte tin-plated leads.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar LDO regulator applications.

Compared with MCP1700T-1202E/TT and XC6210B122MR-G, AP7354D-12W5-7 uniquely combines 150mA capability, sub-µA quiescence, ±1% accuracy, and integrated discharge - making it optimal for space-constrained, battery-critical systems requiring precise power sequencing.

Availability

AP7354D-12W5-7 is available at Aetrix Electronics and suitable for wearable electronics, IoT sensor modules, and wireless camera subsystems requiring stable component supply with guaranteed long-term manufacturability.

Supply support for AP7354D-12W5-7 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 devices, with design and manufacturing facilities certified to IATF 16949 and ISO 9001 standards.

The AP7354 series belongs to Diodes' ultra-low-I_Q LDO product line, engineered specifically for extended battery life in portable and energy-harvesting applications where standby current and output precision are critical.

FAQ

What is the minimum input voltage required for AP7354D-12W5-7 to maintain regulation at 150mA?

The minimum input voltage is determined by dropout: at 150mA, typical dropout is 0.60V for 1.2V output, so VIN must be ≥1.8V. Absolute minimum VIN per datasheet is 2.0V across operating temperature, ensuring margin for worst-case variation and PCB trace drop.

Can the EN pin be left unconnected if always-on operation is desired?

No - the EN pin must never be left floating. For always-on use, tie EN directly to VIN. Floating EN causes undefined behavior due to internal leakage paths, potentially resulting in erratic startup, increased quiescent current, or failure to enable.

Is the output discharge feature active during normal operation or only in shutdown?

The active output discharge is enabled exclusively when EN is driven low (≤0.4V). During normal operation (EN ≥1.0V), the discharge FET is off and has no effect on regulation or transient response. Discharge occurs only after EN deactivation and completes before the next enable cycle.

Does AP7354D-12W5-7 require an external bypass capacitor on the EN pin?

No external capacitor is required or recommended on the EN pin. The EN input has high impedance and is designed for direct connection to digital GPIO. Adding capacitance would slow enable/disable timing and may cause unreliable power sequencing - especially critical in systems with tight wake-up latency budgets.