Diodes Incorporated AP7313-15SRG-7

Overview

AP7313-15SRG-7 from Diodes Incorporated is a 150mA, fixed 1.5V output, low dropout linear regulator in SOT23R package, featuring 65µA quiescent current, 150mV typical dropout at full load, and stable operation with 1µF ceramic output capacitor. It serves as a power supply rail for ultra-low-power microcontrollers and RF front-ends in portable battery-powered systems.

For engineers reviewing the AP7313-15SRG-7 datasheet, AP7313-15SRG-7 pinout, AP7313-15SRG-7 application, or AP7313-15SRG-7 equivalent, key selection criteria include dropout voltage under 150mA load, PSRR of 65dB at 100Hz, fast 80µs startup time, thermal shutdown at 140°C, and compatibility with minimal 1µF output capacitance.

Technical Context

The AP7313-15SRG-7 integrates a PMOS pass transistor, bandgap reference, error amplifier, and protection circuitry (current limit, short-circuit, thermal shutdown) in a single die. Its architecture enables low dropout and ultra-low IQ across 2V–6V input range without requiring external compensation.

It delivers regulated 1.5V ±2% output over –40°C to +85°C ambient, maintains stability with 10mΩ–200mΩ ESR ceramic capacitors, and achieves <100mV undershoot/overshoot during 0–150mA load transients due to optimized internal loop response.

Key Specifications

Pinout & Package

SOT23R package: 3-pin, RoHS-compliant, green molding compound, 230°C/W θJA on FR-4 PCB with minimum pad layout per AP02001.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar low-quiescent-current LDO applications.

Compared with MCP1700-1502E/TO and TPS70615DBVR, AP7313-15SRG-7 offers optimal balance of ultra-low dropout (150mV), moderate IQ (65µA), and SOT23R footprint-making it ideal for space-constrained, battery-voltage–sensitive designs where 1µF output capacitance is preferred.

Availability

AP7313-15SRG-7 is available at Aetrix Electronics and suitable for portable medical monitors, GSM baseband subsystems, wireless sensor nodes, and USB-powered peripherals requiring stable component supply with guaranteed long-term availability.

Supply support for AP7313-15SRG-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 centers in Asia, Europe, and the U.S., serving industrial, computing, consumer, and communications markets.

The AP7313 product line targets ultra-low-power, space-constrained battery-operated applications-delivering high PSRR, fast transient response, and minimal external components for reliable point-of-load regulation.

FAQ

What is the minimum input voltage required for AP7313-15SRG-7 to maintain 1.5V regulation at 150mA?

The AP7313-15SRG-7 requires a minimum input voltage of 1.65V to sustain 1.5V output at 150mA load, based on its 150mV typical dropout voltage. Operation below this threshold results in unregulated output, and the device remains functional down to 2V input per absolute maximum ratings-ensuring safe start-up and brown-out immunity.

Can AP7313-15SRG-7 operate without an output capacitor?

No-AP7313-15SRG-7 requires a minimum 1µF X7R or X5R ceramic output capacitor connected directly between OUT and GND for stability and transient performance. Omitting it causes oscillation and uncontrolled output voltage; the device does not support no-capacitor operation, though it imposes no minimum load current requirement.

Is AP7313-15SRG-7 compatible with 0402-size 1µF ceramic capacitors?

Yes-AP7313-15SRG-7 is explicitly characterized for stability with 1µF ceramic capacitors having 10mΩ–200mΩ ESR, including standard 0402 X7R types. Layout best practice requires placing the capacitor within 2mm of the OUT and GND pins using short, wide traces to minimize parasitic inductance and ensure robust transient response.

Does AP7313-15SRG-7 provide reverse current blocking?

No-AP7313-15SRG-7 lacks integrated reverse current blocking; if VOUT exceeds VIN (e.g., during hot-swap or backup power scenarios), current can flow backward from OUT to IN through the internal PMOS body diode. External protection (e.g., series Schottky diode) is required in systems where reverse current poses reliability or safety risks.