Diodes Incorporated AP7215-33YG-13

Overview

AP7215-33YG-13 from Diodes Incorporated is a 3.3V, 600mA CMOS low-dropout linear regulator in SOT89-3L package with active-low open-drain reset output (VDOUT), 60mV typical dropout at 30mA, and 50μA quiescent current. It operates from 3.3V to 5.5V input, features current limit (750mA) and short-circuit (50mA) protection, and is used in mobile handsets and digital still cameras for stable core voltage regulation.

For engineers reviewing the AP7215-33YG-13 datasheet, AP7215-33YG-13 pinout, AP7215-33YG-13 application, or AP7215-33YG-13 equivalent, key selection criteria include guaranteed 600mA load capability, VDOUT reset timing (20ms typ), thermal resistance (173°C/W), EN enable control thresholds (1.6V/0.25V), and stability with 1μF MLCC output capacitors.

Technical Context

The AP7215-33YG-13 integrates a precision bandgap reference, error amplifier, and current-limit comparator in a CMOS process to deliver high-accuracy 3.3V output with ±2% initial tolerance and ±100ppm/°C temperature coefficient. Its VDOUT pin implements an open-drain microprocessor supervisory function with hysteresis (VHYS = VDF × 1.02–1.08) and 10–40ms delay (tRP).

It uses internal trimming for fixed 3.3V output and supports shutdown via EN pin (logic-high enable, logic-low disable). The regulator remains stable with low-ESR ceramic capacitors ≥1μF and includes thermal foldback to protect against junction overheating up to 150°C.

Key Specifications

Pinout & Package

SOT89-3L package: 3-pin surface-mount, thermally enhanced tab connected to VIN; 1.5mm × 2.9mm footprint; RoHS-compliant, green molding compound.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCP1700-3302E/TO and TPS73633DBVT, AP7215-33YG-13 uniquely combines 600mA drive, integrated VDOUT reset, and EN control in SOT89-3L-making it optimal for portable SoC power domains requiring coordinated boot sequencing and robust fault protection.

Availability

AP7215-33YG-13 is available at Aetrix Electronics and suitable for mobile handsets, digital still cameras, and HD/Blu-ray DVD players requiring stable component supply, long-lifecycle availability, and RoHS-compliant packaging.

Supply support for AP7215-33YG-13 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 consumer, industrial, and computing markets.

The AP7215 belongs to Diodes' CMOS LDO regulator product line, engineered specifically for battery-powered portable electronics where low dropout, low IQ, and integrated power-supervision functions reduce bill-of-materials and simplify PCB layout.

FAQ

What is the minimum input voltage required for AP7215-33YG-13 to maintain 3.3V output?

The AP7215-33YG-13 requires VIN ≥ 3.3V to sustain regulation, but its 60mV dropout at 30mA means it can operate down to ~3.36V input under light load. At full 600mA, dropout rises to ~250mV, so VIN must be ≥ 3.55V to guarantee 3.3V output. Input below 3.3V disables regulation and triggers VDOUT reset assertion.

Can AP7215-33YG-13 be used without connecting the EN pin?

Yes-the EN pin may be left unconnected only if tied directly to VIN via a short trace or 0Ω resistor. Floating EN is not recommended due to risk of erratic enable/disable behavior. If shutdown is unused, hard-wiring EN to VIN ensures continuous operation and avoids unintended power cycling during noise events.

Is an external pull-up resistor required for the VDOUT pin?

Yes-a 100kΩ pull-up resistor to VIN is required for VDOUT to function as an active-low reset signal. Without it, VDOUT cannot assert a valid logic-high state during normal operation. The datasheet specifies this value to ensure proper rise time and noise immunity while minimizing current draw during reset assertion.

Does AP7215-33YG-13 require a minimum load current to maintain regulation?

No-it maintains regulation from 0mA to 600mA without minimum load requirement. The CMOS design eliminates the need for a bleed resistor, unlike older bipolar LDOs. This enables true zero-load operation in deep-sleep modes of portable devices, preserving battery energy without compromising output accuracy or stability.