Diodes Incorporated AP7335-12SNG-7

Overview

AP7335-12SNG-7 from Diodes Incorporated is a fixed-output 1.2V, 300mA low-dropout linear regulator in DFN2020-6 package, featuring 35μA quiescent current, 150mV dropout at full load, 65dB PSRR at 1kHz, and fast 220μs startup. It integrates enable control, thermal shutdown, current limit, and short-circuit protection, and is optimized for battery-powered portable electronics requiring stable low-voltage rail generation.

For engineers reviewing the AP7335-12SNG-7 datasheet, AP7335-12SNG-7 pinout, AP7335-12SNG-7 application, or AP7335-12SNG-7 equivalent, key selection criteria include its 1.2V fixed output, DFN2020-6 footprint compatibility, 2V–6V input range, ±2% output accuracy over –40°C to +85°C, and stability with 1μF ceramic output capacitor-critical for space-constrained, low-power embedded designs.

Technical Context

The AP7335-12SNG-7 implements a PMOS pass transistor architecture enabling ultra-low dropout (150mV @ 300mA) and minimal quiescent current (35μA typ). Its internal 0.8V bandgap reference and error amplifier regulate output precisely without external components in fixed-voltage configuration.

Enable logic operates with VIH ≥ 1.4V and VIL ≤ 0.4V, supporting direct connection to 1.8V/3.3V GPIOs. Protection circuitry includes foldback current limiting (400–600mA), short-circuit clamping (~140mA), and thermal shutdown activation at ~145°C with 15°C hysteresis-ensuring robust operation under fault conditions.

Key Specifications

Pinout & Package

AP7335-12SNG-7 uses the DFN2020-6 (2.0mm × 2.0mm, 0.65mm pitch) package with exposed thermal pad. Pin 1 (EN) is top-left when marking dot is oriented top-left; pin numbering follows standard counter-clockwise sequence.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCP1700T-1202E/TT and XC6206P122MR-G, AP7335-12SNG-7 uniquely balances 300mA delivery, 150mV dropout, and 35μA IQ - enabling both high-current bursts and multi-year battery life in compact form factors where input headroom is constrained.

Availability

AP7335-12SNG-7 is available at Aetrix Electronics and suitable for wearable health sensors, Bluetooth LE audio devices, industrial wireless sensor nodes, and portable medical diagnostic tools requiring stable component supply with full traceability and long-term lifecycle support.

Supply support for AP7335-12SNG-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 integrated circuits, specializing in high-performance, energy-efficient solutions for consumer, industrial, and automotive markets.

The AP7335 series belongs to Diodes' low-power LDO portfolio, designed specifically for battery-operated portable electronics demanding ultra-low quiescent current, fast transient response, and small-footprint packaging without sacrificing output accuracy or protection robustness.

FAQ

Is AP7335-12SNG-7 compatible with 1μF ceramic output capacitors?

Yes. The AP7335-12SNG-7 is explicitly characterized and guaranteed stable with a 1μF ceramic output capacitor having ESR >15mΩ. This eliminates the need for larger or more expensive tantalum capacitors, reducing BOM cost and PCB area while maintaining excellent load transient response and phase margin.

What is the maximum allowable input voltage for AP7335-12SNG-7?

The absolute maximum input voltage is 6.5V, but the recommended operating range is 2.0V to 6.0V. Operation above 6.0V risks exceeding internal junction temperature limits under load, especially in the DFN2020-6 package with its 251°C/W θJA; sustained use above 6.0V is not advised.

Does AP7335-12SNG-7 require an external resistor divider for 1.2V output?

No. AP7335-12SNG-7 is the fixed 1.2V version; it contains internal feedback resistors and requires no external components for regulation. The ADJ variant (e.g., AP7335-SNG-7) would require R1/R2, but this part delivers 1.2V directly from OUT pin with only IN, GND, EN, and OUT connections needed.

How does thermal shutdown behave during continuous overload?

When junction temperature reaches ~145°C, thermal shutdown disables the output. After cooling to ~130°C (15°C hysteresis), the regulator automatically resumes operation. Under sustained overload, this causes controlled on/off cycling - limiting average power dissipation and preventing permanent damage without requiring external intervention.