Diodes Incorporated AP7353-285CV4-7

Overview

AP7353-285CV4-7 from Diodes Incorporated is a 250mA low-dropout linear regulator (LDO) with fixed 2.85V output, ±1% accuracy, 90dB PSRR at 1kHz, 10µV_rms output noise (10Hz–100kHz), and 18µA typical quiescent current. It features CMOS-based architecture, enable control, thermal shutdown, and short-circuit protection - deployed in battery-powered RF supplies and portable media players requiring stable, low-noise biasing.

For engineers reviewing the AP7353-285CV4-7 datasheet, AP7353-285CV4-7 pinout, AP7353-285CV4-7 application, or AP7353-285CV4-7 equivalent, key selection criteria include dropout voltage at 250mA (73mV typ. @ V_OUT=2.85V), EN logic thresholds (0.4V max low, 1.2V min high), thermal resistance (150°C/W for X1-WLB0707-4), and compatibility with 1µF ceramic output capacitors.

Technical Context

The AP7353-285CV4-7 implements a CMOS-based LDO architecture with integrated voltage reference, error amplifier, and current-limit circuitry. Its enable input directly controls NMOS pass transistor conduction, supporting fast turn-on (180µs) and turn-off response while maintaining non-discharge behavior at shutdown.

Designed for high-PSRR, low-noise operation, it achieves 90dB ripple rejection at 1kHz (I_OUT=10mA) and 70dB at 10kHz (I_OUT=250mA), with line regulation of 0.02%/V and load regulation as tight as 0.001%/mA (X1 package). The device operates across 2.0V–5.5V input range and supports ambient temperatures from –40°C to +85°C.

Key Specifications

Pinout & Package

X1-WLB0707-4 (Type A1) is a 0.64mm × 0.64mm wafer-level chip-scale package (WLCSP) with 4 solder bumps and an exposed thermal pad (EP). Its ultra-compact footprint minimizes PCB area and improves thermal coupling to ground planes.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AP7353-285CV4-7, AP7361-285CG-7 trades lower thermal efficiency for higher current headroom, while MCP1700T-285I/OT sacrifices PSRR, noise, and enable control to achieve microamp-level quiescent current - making AP7353-285CV4-7 the optimal balance for RF-sensitive, medium-current portable applications.

Availability

AP7353-285CV4-7 is available at Aetrix Electronics and suitable for smartphone camera modules, Bluetooth LE sensor nodes, portable media player audio codecs, and Wi-Fi 6E adapter RF front-ends requiring stable component supply, low-noise regulation, and compact WLCSP packaging.

Supply support for AP7353-285CV4-7 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-performance power management, signal integrity, and protection solutions for consumer, industrial, and automotive markets.

The AP7353 series belongs to Diodes' precision LDO portfolio, engineered specifically for noise-sensitive portable electronics where PSRR, output accuracy, and ultra-small footprint are critical design constraints.

FAQ

What is the maximum input voltage for AP7353-285CV4-7?

The absolute maximum input voltage is 6.0V, but recommended operating range is 2.0V to 5.5V. Exceeding 5.5V risks permanent damage per Absolute Maximum Ratings. For 2.85V output, minimum functional input is 2.92V (accounting for 73mV typical dropout), ensuring reliable regulation across battery discharge curves.

Does AP7353-285CV4-7 include reverse-current protection?

No, the AP7353-285CV4-7 does not integrate reverse-current blocking. When disabled (EN = low), the output may discharge through the pass transistor if V_OUT > V_IN. For applications requiring isolation, an external Schottky diode between IN and OUT is recommended - though this adds voltage drop and board area.

Can AP7353-285CV4-7 operate with ceramic capacitors smaller than 1µF?

Yes - the device is stable down to 0.7µF effective capacitance, accounting for DC bias, temperature, and tolerance derating of X7R/X5R ceramics. However, using <1µF reduces load transient immunity and PSRR margin; 1µF is strongly recommended to ensure robustness across all operating conditions.

Is the exposed pad (EP) on AP7353-285CV4-7 electrically connected?

No, the EP is a thermal pad only - it has no electrical function. Per datasheet guidance, it must be connected to a large GND copper pour for thermal dissipation, but must not serve as the sole GND connection point. Bump 3 (GND) remains the primary electrical ground terminal.