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Diodes Incorporated AP7383-18W5-7
- Part No.:
- AP7383-18W5-7
- Manufacturer:
- Diodes Incorporated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AP7383-18W5-7.pdf
- Description:
- IC REG LIN 1.8V SOT25 T&R 3K
- Quantity:
- Payment:
- Shipping:
Inventory:10,020
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Product details
Overview
AP7383-18W5-7 from Diodes Incorporated is a fixed-output 1.8V ultra-low dropout (ULDO) linear regulator IC designed for space-constrained, battery-powered systems. It delivers up to 150mA output current with 500mV dropout at 50mA, ±1% output voltage accuracy, and only 1.8µA ground current at full load - enabling extended runtime in portable instrumentation and USB-powered devices.
For engineers reviewing the AP7383-18W5-7 datasheet, AP7383-18W5-7 pinout, AP7383-18W5-7 application, or AP7383-18W5-7 equivalent, key selection considerations include its 3.5–30V input range, thermal shutdown protection, enable control (in W5 package), compatibility with low-ESR ceramic capacitors, and SOT25-5 (W5) package thermal performance (θJA = 193°C/W).
Technical Context
The AP7383-18W5-7 integrates a precision voltage reference, error amplifier, resistor network for fixed 1.8V output, current-limit circuit (150mA typical), and chip-enable logic - all operating within a single monolithic silicon die. Its architecture supports stable regulation under wide line (±0.05%/V) and load (±0.5%) variations without external compensation.
Thermal shutdown activates at +160°C with +20°C hysteresis, and the EN pin (Pin 3 in SOT25-W5) provides active-high logic control with 1µA input current and 2.0V/0.4V logic thresholds - enabling precise power sequencing in multi-rail embedded systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8V ±1% - ensures stable core supply for low-voltage microcontrollers and sensors. |
| Input Voltage Range | 3.5V to 30V - supports direct connection to automotive batteries, industrial rails, or multi-cell Li-ion packs. |
| Max Output Current | 150mA - sufficient for powering MCU cores, RF transceivers, or small display drivers. |
| Dropout Voltage | 360mV (typ) @ 50mA - enables regulation from 2.16V input, critical for deep battery discharge operation. |
| Ground Current | 1.8µA (typ) @ IOUT = 0–150mA - minimizes quiescent loss in always-on monitoring circuits. |
| Line Regulation | 0.05%/V - maintains output stability across wide input fluctuations without additional filtering. |
| Load Regulation | ±0.5% - guarantees consistent voltage delivery from no-load to full 150mA load. |
Pinout & Package
SOT25-5 (W5) package: 2.8mm × 2.9mm × 1.05mm body, 5-pin surface-mount, moisture sensitivity level 1, matte tin-plated leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VIN | Main input supply connection; accepts 3.5–30V with internal overvoltage clamp. |
| 2 | GND | Power ground reference; must be connected to low-impedance PCB plane for thermal and noise control. |
| 3 | EN | Active-high enable input; pulls regulator into ultra-low standby mode (<0.01µA) when low. |
| 4 | NC | No internal connection; recommended to tie to GND for improved thermal dissipation via PCB copper. |
| 5 | VOUT | Regulated 1.8V output; requires ≥1µF ceramic capacitor (X5R/X7R) placed within 3mm for stability. |
Key Features
| Feature | Design Value |
|---|---|
| Wide Input Range | 3.5–30V operation eliminates need for pre-regulation in 12V/24V industrial or automotive auxiliary rails. |
| Ultra-Low Quiescent Current | 1.8µA ground current across full load range extends battery life in IoT endpoint sleep modes. |
| Enable Control | Dedicated EN pin allows synchronized power-up/down sequencing with host processors or PMICs. |
| Thermal Shutdown | +160°C trip with +20°C hysteresis prevents damage during sustained overload or poor heatsinking. |
| Ceramic Capacitor Compatible | Stable with ≥1µF X5R/X7R MLCCs - reduces BOM cost and board area vs. tantalum or aluminum electrolytics. |
Applications
| Portable Medical Sensors | USB-Powered Test Equipment |
|---|---|
|
Use Scenario: Continuous glucose monitor (CGM) sensor node powered by coin cell or rechargeable LiPo. IC Role / Device Role / Timing Role: Primary 1.8V LDO supplying ADC reference and ultra-low-power MCU core. Use Value: 1.8µA ground current preserves battery capacity for >1-year operation; 30V input tolerance accommodates charger transients. |
Use Scenario: Handheld oscilloscope probe interface module drawing power from USB 2.0 port. IC Role / Device Role / Timing Role: Post-regulator delivering clean 1.8V to high-speed ADC and FPGA I/O banks. Use Value: ±0.5% load regulation ensures measurement accuracy across varying USB source impedance; EN pin enables firmware-controlled power gating. |
| Industrial Data Loggers | Smart Wearable Controllers |
|
Use Scenario: Battery-backed environmental logger deployed in remote locations with wide ambient temperature range. IC Role / Device Role / Timing Role: Main system regulator for microcontroller, EEPROM, and RS-485 transceiver. Use Value: -40°C to +125°C operating junction range supports outdoor deployment; thermal shutdown protects against enclosure overheating. |
Use Scenario: Fitness tracker using dual-cell Li-ion (up to 8.4V) with integrated BLE SoC requiring 1.8V I/O supply. IC Role / Device Role / Timing Role: Secondary LDO generating stable 1.8V rail from main buck converter output. Use Value: 500mV dropout at 50mA enables efficient use of battery energy down to 2.3V; SOT25-5 footprint saves space on compact flex PCBs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultra-low dropout linear regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-1802E/TT (Microchip) | 150mA max, 600mV dropout @ 250mA, no EN pin, SOT23-3 package. | Lacks enable control and has higher dropout - unsuitable for tight input margin or sequenced power systems. | Select only if board space is constrained to SOT23-3 and enable functionality is unnecessary. |
| TPS7A0518PDBVR (TI) | 200mA max, 170mV dropout @ 100mA, 0.5µA IQ, EN pin, X2SON-4 package. | Lower dropout and IQ, but rated only to 5.5V input - cannot replace AP7383-18W5-7 in 12V+ systems. | Prefer for low-input, ultra-low-power apps (e.g., coin-cell IoT); avoid where >5.5V input is present. |
Compared with MCP1700T-1802E/TT, AP7383-18W5-7 adds enable control and wider input range; versus TPS7A0518PDBVR, it trades lower dropout for 30V input capability - making it uniquely suited for industrial and automotive auxiliary power domains.
Availability
AP7383-18W5-7 is available at Aetrix Electronics and suitable for battery-powered medical sensors, USB-powered test equipment, and industrial data loggers requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AP7383-18W5-7 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-reliability power management, signal integrity, and protection solutions for industrial, computing, and consumer markets.
The AP7383 series belongs to Diodes' ULDO regulator product line, engineered specifically for applications demanding wide-input operation, ultra-low quiescent current, and robust thermal protection in compact portable and harsh-environment systems.
FAQ
What is the minimum input voltage required for regulation at 1.8V output?
The AP7383-18W5-7 requires VIN ≥ VOUT + VDROP. With a typical dropout of 360mV at 50mA, the minimum functional input is 2.16V. However, the datasheet specifies a minimum operating VIN of 3.5V to ensure guaranteed performance across temperature, load, and process variation - this is the design-critical lower limit.
Can the AP7383-18W5-7 be used without an input capacitor?
No. The datasheet mandates a minimum 1.0µF ceramic input capacitor (X5R/X7R) placed within 3mm of VIN and GND pins. Omitting it risks instability, input rail collapse during load transients, and potential damage from voltage spikes - especially given the 30V absolute maximum rating.
Is the NC pin (Pin 4) required to be grounded?
Pin 4 is not internally connected but is recommended to be tied to GND. This maximizes PCB copper area beneath the package, improving thermal dissipation - critical for maintaining safe junction temperature at 150mA continuous load in the SOT25-5 (W5) package (θJA = 193°C/W).
Does the AP7383-18W5-7 meet AEC-Q200 for automotive use?
No. While Diodes offers AEC-Q200-qualified variants in the AP7383 family (e.g., AP7383-18W5Q-7), the standard AP7383-18W5-7 is not automotive-qualified. It lacks PPAP documentation, AEC change control, and IATF 16949 manufacturing certification - use only in commercial or industrial applications.
AP7383-18W5-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 30V
- Voltage - Output (Min/Fixed):
- 1.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- -
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- 3 µA
- Current - Supply (Max):
- 3 µA
- PSRR:
- -
- Control Features:
- Enable
- Protection Features:
- Current Limit, Thermal Shutdown
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-25
AP7383-18W5-7 FAQ
1.How can I place an order for AP7383-18W5-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7383-18W5-7 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 AP7383-18W5-7 reliable?
The price and inventory of AP7383-18W5-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7383-18W5-7 is usually 5 days.
3.What payment methods are accepted for AP7383-18W5-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7383-18W5-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7383-18W5-7?
AP7383-18W5-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7383-18W5-7 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 AP7383-18W5-7?
For technical support, including AP7383-18W5-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7383-18W5-7 requirements.
6.How does Aetrix verify that AP7383-18W5-7 is sourced from the original manufacturer or authorized distributors?
All AP7383-18W5-7 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 AP7383-18W5-7 meets industry standards.
7.What is the process for return or replacement of AP7383-18W5-7?
All AP7383-18W5-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7383-18W5-7, 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 AP7383-18W5-7 part is unused and in its original packaging.
Return procedure for AP7383-18W5-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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