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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Special Purpose Regulators

Diodes Incorporated AP7368D-12RS4-7

Name: AP7368D-12RS4-7
Brand: Diodes Incorporated
SKU: AP7368D-12RS4-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AP7368D-12RS4-7

Manufacturer:: Diodes Incorporated

Category:: Special Purpose Regulators

Package:: 8-XFDFN Exposed Pad

Datasheet:: AP7368D-12RS4-7.pdf

Description:: LDO CMOS HICURR X1-DFN1612-8 T&R

Quantity:: RFQ Add To RFQ list

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Product details

Overview

AP7368D-12RS4-7 from Diodes Incorporated is a 500mA/1A low-noise RF LDO regulator in X1-DFN1612-8 (Type B) package, delivering ±1% output voltage accuracy at 1.2V, 80dB PSRR at 1kHz, and 16µV_rms output noise (10Hz–100kHz). It features dual current-limit selection (LCON pin), foldback short-circuit protection (60mA), and ultra-low 110µA quiescent current - optimized for RF supply rails in portable wireless communication devices.

For engineers reviewing the AP7368D-12RS4-7 datasheet, AP7368D-12RS4-7 pinout, AP7368D-12RS4-7 application, or AP7368D-12RS4-7 equivalent, key selection criteria include fixed 1.2V output, LCON-configurable 500mA/1A current limit, thermal shutdown at +150°C, DFN1612-8 footprint constraints, and RF-grade noise/PSRR performance for sensitive analog front-ends.

Technical Context

The AP7368D-12RS4-7 implements a CMOS-based LDO architecture with integrated voltage reference, error amplifier, and current-limit circuitry. Its dual-output-current capability (500mA or 1A) is selected via the LCON pin logic level, while foldback short-circuit protection activates at 60mA when LCON = "L".

It operates across 1.7V–5.5V input range with dropout as low as 0.07V at 1.2V_OUT/500mA, supports fast load transient response via 1µF ceramic C_IN/C_OUT, and includes enable control (EN pin) with 0.4V logic-low threshold and auto-discharge N-channel MOSFET (30Ω on-resistance).

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 1.2V ±1% - ensures stable core voltage for low-power RF ICs without external feedback network.
Max Output Current	500mA (LCON = L) or 1A (LCON = H) - enables flexible power delivery scaling per system load profile.
PSRR	80dB at 1kHz - suppresses switching noise from adjacent DC-DC converters feeding RF signal chains.
Output Noise	16µV_rms (10Hz–100kHz) - preserves SNR in RF receivers and PLL VCO supply domains.
Quiescent Current	110µA typical - extends battery life in always-on wireless sensor nodes and standby modes.
Dropout Voltage	0.07V at 1.2V_OUT/500mA - maintains regulation under tight input headroom (e.g., single-cell Li-ion discharge).
Thermal Shutdown	+150°C with +20°C hysteresis - prevents permanent damage during sustained overload or poor PCB thermal design.

Pinout & Package

Packaged in X1-DFN1612-8 (Type B), a 1.6mm × 1.2mm, 0.4mm-pitch, thermally enhanced leadless package with exposed pad (EP) for PCB-level heat dissipation. Recommended layout uses large copper area connected to GND under EP.

Pin/Terminal	Circuit Role	Design Meaning
1, 2 VOUT	Regulated output node	Dual-pin configuration lowers IR drop and improves current sharing for 500mA/1A loads.
3 LCON	Current-limit select input	Logic-high (≥1V) sets 1A limit; logic-low (≤0.4V) sets 500mA limit and 300mA inrush clamp.
4 VFB	Feedback reference point	Internally connected to 1.2V reference; not accessible - confirms fixed-output configuration.
5 GND	Power ground return	Primary ground path for output current; must be low-impedance connection to minimize noise coupling.
6 EN	Enable control input	Active-high logic (0–0.4V = off, 1–5.5V = on); 0.5µA standby leakage preserves battery integrity.
7, 8 VDD	Input power supply	Dual-pin layout reduces series resistance and improves high-frequency decoupling for RF stability.
EP	Exposed thermal pad	Not electrically functional; requires solder mask opening and thermal via array to inner GND plane.

Key Features

Feature	Design Value
RF-optimized noise performance	16µV_rms output noise enables clean VCO and LNA biasing without additional filtering.
Configurable current limiting	LCON pin selects between 500mA (foldback = 60mA) and 1A (foldback = 110mA) for system-level fault containment.
Ultra-low quiescent current	110µA IQ allows >1-year battery life in BLE/Wi-Fi IoT endpoints with periodic wake-up cycles.
Integrated auto-discharge	30Ω N-channel FET discharges VOUT when EN = low - prevents back-powering of upstream circuits.
High PSRR at RF frequencies	80dB rejection at 1kHz and 75dB at 1.8V_OUT mitigates noise coupling from PMIC switching artifacts.

Applications

Smartphone RF Front-End

Wireless Camera Module

Use Scenario: Powering 5GHz Wi-Fi 6 transceiver RFIC requiring ultra-clean 1.2V supply under dynamic TX/RX load transitions.

IC Role / Device Role / Timing Role: Primary LDO for RF synthesizer VCO and PA bias rails, replacing noisier switching regulators.

Use Value: 16µV_rms noise and 80dB PSRR prevent EVM degradation and maintain -45dBc ACLR in 80MHz channels.

Use Scenario: Supplying image sensor analog core and ISP I/O banks in compact USB-C webcam modules.

IC Role / Device Role / Timing Role: Fixed-output LDO delivering stable 1.2V to CIS analog pixel array and column ADC reference.

Use Value: ±1% accuracy and <0.1V dropout ensure consistent exposure linearity across 3.0–4.2V battery range.

Portable Media Player Audio Codec

Bluetooth LE Beacon

Use Scenario: Providing low-noise 1.2V bias to stereo DAC and headphone amplifier in battery-powered audio players.

IC Role / Device Role / Timing Role: Post-regulator for audio subsystem, isolating DAC from noisy main system rail.

Use Value: 110µA quiescent current extends playback time by >8% versus standard LDOs; 16µV_rms noise avoids audible hiss.

Use Scenario: Powering Bluetooth 5.0 SoC (e.g., nRF52840) in coin-cell–powered asset trackers with 10-second advertising intervals.

IC Role / Device Role / Timing Role: Always-on LDO enabling rapid wake-from-sleep (<10µs EN response) and precise timing reference stability.

Use Value: LCON = "L" configures 500mA limit and 300mA inrush control - prevents coin-cell voltage sag during radio burst transmission.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
Torex XC6210B122MR-G	1.2V fixed, 500mA, 25µV_rms noise, no LCON configurability, SOT-25 package	Lacks current-limit selection and RF-optimized PSRR (65dB @1kHz)	Choose for cost-sensitive, space-tolerant designs where 500mA fixed limit suffices and DFN1612-8 footprint is not required.
Richtek RT9080-12PU5	1.2V fixed, 1A, 20µV_rms noise, 70dB PSRR @1kHz, DFN2020-6 package	No LCON pin; single 1A limit only; larger 2.0mm × 2.0mm footprint	Choose when 1A continuous current is mandatory and board area permits larger DFN2020-6; avoid if LCON-based fault segmentation is needed.

Compared with XC6210B122MR-G and RT9080-12PU5, the AP7368D-12RS4-7 uniquely combines dual-current-limit selection, industry-leading 16µV_rms noise, and minimal 1.6mm × 1.2mm footprint - making it optimal for RF-critical, size-constrained portable designs requiring configurable overcurrent protection.

Availability

AP7368D-12RS4-7 is available at Aetrix Electronics and suitable for smartphone RF front-ends, wireless camera modules, and Bluetooth LE beacons requiring stable component supply, long-term lifecycle support, and RoHS-compliant green packaging.

Supply support for AP7368D-12RS4-7 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 AP7368 belongs to Diodes' low-noise RF LDO product line, engineered specifically for noise-sensitive wireless communication systems where PSRR, output noise, and small-footprint thermal performance are critical design constraints.

FAQ

What is the function of the LCON pin on AP7368D-12RS4-7?

The LCON pin configures the device's output current limit: logic-high (≥1V) sets 1A maximum output with 110mA foldback short-circuit current, while logic-low (≤0.4V) sets 500mA maximum with 60mA foldback and 300mA inrush current limiting. This enables system-level current budgeting and fault containment without external components.

Does AP7368D-12RS4-7 require external feedback resistors for 1.2V output?

No. The AP7368D-12RS4-7 is a fixed-output variant with internal resistor network configured for 1.2V. Pin 4 (VFB) is internally connected to the 1.2V reference and must not be externally biased or loaded - no external resistors are needed or permitted.

Can AP7368D-12RS4-7 be used with ceramic capacitors smaller than 1µF?

The datasheet specifies 1µF ceramic input/output capacitors as minimum for stability and transient response. Using smaller values risks instability, increased output ripple, and degraded PSRR - especially under RF load conditions. Layout must place capacitors within 2mm of VDD/VOUT/GND pins with low-inductance traces.

Is the exposed pad (EP) on AP7368D-12RS4-7 electrically connected?

No. The exposed pad is a thermal pad only, not an electrical terminal. It must be soldered to a PCB copper area connected to GND for thermal dissipation but must not serve as the primary GND connection. Electrical grounding remains through Pin 5 (GND); improper EP handling causes thermal derating and potential junction overheating.

AP7368D-12RS4-7 Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: 8-XFDFN Exposed Pad

Packaging:: Tape & Reel (TR)

Product Status:: Active

Applications:: LDO, Cameras, Wireless Devices

Voltage - Input:: 1.7V ~ 5.5V

Number of Outputs:: 1

Voltage - Output:: 1.2V

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: X1-DFN1612-8 (Type B)

AP7368D-12RS4-7 FAQ

1.How can I place an order for AP7368D-12RS4-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for AP7368D-12RS4-7 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for AP7368D-12RS4-7 reliable?

The price and inventory of AP7368D-12RS4-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7368D-12RS4-7 is usually 5 days.

3.What payment methods are accepted for AP7368D-12RS4-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7368D-12RS4-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AP7368D-12RS4-7?

AP7368D-12RS4-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AP7368D-12RS4-7 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for AP7368D-12RS4-7?

For technical support, including AP7368D-12RS4-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7368D-12RS4-7 requirements.

6.How does Aetrix verify that AP7368D-12RS4-7 is sourced from the original manufacturer or authorized distributors?

All AP7368D-12RS4-7 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that AP7368D-12RS4-7 meets industry standards.

7.What is the process for return or replacement of AP7368D-12RS4-7?

All AP7368D-12RS4-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7368D-12RS4-7, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The AP7368D-12RS4-7 part is unused and in its original packaging.

Return procedure for AP7368D-12RS4-7:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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