Diodes Incorporated AP7354-22SA-7

Overview

AP7354-22SA-7 from Diodes Incorporated is a fixed 2.2V, 150mA ultra-low quiescent current LDO regulator in SOT23 package, featuring ±1% output voltage accuracy, 0.25µA quiescent current, and enable-controlled shutdown. It delivers stable power to low-power sensor nodes and wearable electronics operating from 2.0V–5.5V input sources.

For engineers reviewing the AP7354-22SA-7 datasheet, AP7354-22SA-7 pinout, AP7354-22SA-7 application, or AP7354-22SA-7 equivalent, key selection criteria include dropout voltage at 150mA (0.27V typ), standby current (0.02µA), EN logic thresholds (0.4V low / 1.0V high), and SOT23 thermal resistance (170°C/W).

Technical Context

The AP7354-22SA-7 integrates a precision voltage reference, error amplifier, current-limit circuit, and active-high enable input-enabling precise regulation and zero-load shutdown. Its internal resistor network fixes VOUT at 2.2V without external feedback components.

It operates across –40°C to +85°C ambient, supports 0–150mA load range with <±40mV load regulation (for VOUT ≤ 2.0V) and <0.1%/V line regulation, and features built-in ESD protection (>4kV HBM) and latch-up immunity (>400mA).

Key Specifications

Pinout & Package

SOT23-3 package: 1.40mm × 2.40mm footprint, 0.915mm height, lead-free matte tin plating, moisture sensitivity level 1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCP1700-2202E/TO and XC6206P222MR-G, the AP7354-22SA-7 uniquely combines SOT23-3 size, 150mA capability, 0.25µA IQ, and integrated EN-making it optimal for space- and energy-constrained always-on edge devices.

Availability

AP7354-22SA-7 is available at Aetrix Electronics and suitable for wearable electronics, IoT sensor nodes, and battery-operated camera modules requiring stable component supply with long-lifecycle support.

Supply support for AP7354-22SA-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 solutions for power management, signal integrity, and connectivity applications.

The AP7354 belongs to Diodes' ultra-low-IQ LDO family, engineered specifically for extended-battery-life portable and IoT devices where micropower efficiency and small-footprint integration are critical.

FAQ

What is the minimum input voltage required for AP7354-22SA-7 to maintain regulation at full 150mA load?

The minimum input voltage is calculated as VOUT + Dropout = 2.2V + 0.27V = 2.47V (typical). At worst-case 0.70V dropout (per datasheet Table 2), VIN must be ≥2.90V to sustain 150mA output at 2.2V with margin across temperature and process variation.

Does AP7354-22SA-7 include output discharge functionality?

No. The "SA" suffix denotes SOT23 package without output discharge. Only AP7354D variants (e.g., AP7354D-22W5-7) integrate an active discharge FET. For AP7354-22SA-7, external discharge circuitry is required if rapid VOUT decay after shutdown is needed.

Can the EN pin be left unconnected in AP7354-22SA-7?

No. The EN pin must never float. If enable control is unused, tie EN directly to VIN to ensure permanent regulator activation. Floating EN may cause erratic startup behavior or unintended shutdown due to noise coupling.

What is the recommended PCB layout practice for minimizing noise on the VOUT rail?

Place a 0.1µF X5R/X7R ceramic capacitor between VOUT and GND within 2mm of the pins, use solid ground plane under the device, route VIN and VOUT traces wide and short, and avoid routing noisy signals (e.g., clocks, RF) near the LDO's sensitive analog pins.