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Diodes Incorporated AP7370-50WR-7
- Part No.:
- AP7370-50WR-7
- Manufacturer:
- Diodes Incorporated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AP7370-50WR-7.pdf
- Description:
- IC REG LINEAR 5V 300MA SOT25
- Quantity:
- Payment:
- Shipping:
Inventory:5,060
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Product details
Overview
AP7370-50WR-7 from Diodes Incorporated is a fixed-output 5.0V, 300mA ultra-low dropout (ULDO) linear regulator in SOT25 package, featuring 18V max input voltage, 450mV dropout at 100mA, ±1% output accuracy, reverse current protection, and thermal shutdown. It powers USB peripherals, portable instrumentation, and battery-powered weighing scales requiring stable low-noise 5V rail.
For engineers reviewing the AP7370-50WR-7 datasheet, AP7370-50WR-7 pinout, AP7370-50WR-7 application, or AP7370-50WR-7 equivalent, this page delivers verified electrical specs, SOT25 terminal mapping, real-world use cases, and validated alternative parts for supply continuity and design migration planning.
Technical Context
The AP7370-50WR-7 integrates a precision voltage reference, error amplifier, and resistor network to regulate 5.0V output with ±1% tolerance across -40°C to +125°C junction temperature. Its internal current limit circuit triggers at 350mA for VOUT > 2.5V, and reverse current protection blocks backflow when VIN < VOUT.
Designed for high PSRR and low noise, it achieves 0.05%/V line regulation and 0.5% load regulation while maintaining 1.5–2.5µA quiescent current at zero load - enabling extended battery life in portable devices operating from 3.2V–18V sources.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0V ±1% - ensures stable logic-level supply for microcontrollers and sensors without external feedback. |
| Max Input Voltage | 18V - supports wide-input applications including automotive accessory rails and industrial 12V/15V systems. |
| Dropout Voltage | 450mV @ 100mA - enables regulation down to VIN = 5.45V, critical for battery-powered systems near end-of-discharge. |
| Quiescent Current | 1.5–2.5µA - minimizes standby power loss in always-on metering and IoT edge nodes. |
| Current Limit | 350mA - provides robust short-circuit protection without latch-up, preserving system reliability during fault conditions. |
| Thermal Shutdown | 160°C with 20°C hysteresis - prevents permanent damage during sustained overload or poor PCB heatsinking. |
| Reverse Current Protection | Integrated - eliminates need for external blocking diode, reducing BOM count and forward voltage drop in backup power paths. |
Pinout & Package
SOT25 (WR) package: 5-pin surface-mount, 2.8mm × 2.9mm footprint, exposed pad not present, RoHS-compliant, halogen-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VIN | Main input supply connection; accepts 3.2V–18V; requires local 1µF ceramic decoupling. |
| 2 | GND | Analog/digital ground reference; must be low-impedance connection to PCB ground plane. |
| 3 | NC | No-connect pin; electrically isolated; no routing or soldering required. |
| 4 | VOUT | Regulated 5.0V output; drives load up to 300mA; requires 1µF ceramic output capacitor. |
| 5 | NC | No-connect pin; electrically isolated; no routing or soldering required. |
Key Features
| Feature | Design Value |
|---|---|
| Wide Input Range (3.2–18V) | Enables single-regulator compatibility across multiple input sources (USB, Li-ion, 12V adapters) without redesign. |
| Ultra-Low Quiescent Current (1.5–2.5µA) | Extends battery runtime in portable instruments by minimizing idle power draw during sleep modes. |
| Low Dropout (450mV @ 100mA) | Maintains regulation under brown-out conditions where input drops below 5.5V, preserving system operation. |
| Integrated Reverse Current Protection | Eliminates external Schottky diode, reducing solution size and cost while preventing backfeed into input rail. |
| Thermal Shutdown with Hysteresis | Auto-recovery after cooling avoids manual reset requirement in thermally constrained enclosures. |
Applications
| Battery-Powered Weighing Scales | Portable Medical Instrumentation |
|---|---|
Use Scenario: Precision load-cell signal conditioning in handheld digital scales powered by two AA batteries (1.8–3.2V) with boost converter feeding AP7370-50WR-7. IC Role / Device Role / Timing Role: Provides clean, low-noise 5.0V supply to 24-bit ADC and microcontroller, rejecting ripple from switching stage. Use Value: ±1% output accuracy and 0.5% load regulation ensure consistent ADC reference stability across battery discharge curve. |
Use Scenario: Powering optical sensor front-end and BLE SoC in pocket-sized pulse oximeters using single Li-ion cell (3.0–4.2V). IC Role / Device Role / Timing Role: Delivers regulated 5.0V to analog front-end and USB interface IC, with reverse current protection isolating VBUS during battery-only operation. Use Value: 1.5µA quiescent current extends device runtime beyond 72 hours on single charge without compromising measurement integrity. |
| Industrial USB-C Peripheral Adapters | Smart Meter Communication Modules |
Use Scenario: Regulating 5V USB-C PD bus (5–20V) to power legacy USB 2.0 hub ICs in field-deployable adapters. IC Role / Device Role / Timing Role: Acts as post-regulator after buck converter, suppressing high-frequency switching noise before USB data lines. Use Value: 0.05%/V line regulation maintains USB voltage compliance despite wide input variation from PD negotiation. |
Use Scenario: Supplying RS-485 transceiver and metrology SoC in DIN-rail smart meters with 12–18V auxiliary input. IC Role / Device Role / Timing Role: Generates isolated 5.0V rail for communication ICs, with thermal shutdown protecting against enclosure overheating in sealed units. Use Value: 160°C thermal cutoff and 20°C hysteresis prevent latch-up during summer ambient exposure while ensuring automatic recovery. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ULDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP7375-50W5-7 | Successor part with same pinout; improved dropout (350mV @ 100mA), lower IQ (0.8µA), and enhanced ESD rating (2kV HBM). | Recommended for new designs requiring longer battery life and higher robustness; not drop-in due to different marking and minor thermal characteristics. | Select AP7375-50W5-7 for new designs; AP7370-50WR-7 remains viable for legacy production and cost-sensitive replacements. |
| MCP1703T-5002E/MB | Microchip 5V LDO in SOT-23-3; 600mV dropout @ 250mA, 2.5µA IQ, no reverse current protection. | Lacks reverse current blocking and thermal hysteresis; requires external diode for backfeed prevention in dual-supply systems. | Use only if board space is constrained to 3-pin SOT-23 and reverse current is not required; verify thermal margin with θJA = 205°C/W. |
Compared with AP7370-50WR-7, AP7375-50W5-7 offers measurable efficiency and reliability gains for new designs, while MCP1703T-5002E/MB trades protection features for smaller footprint - making the original part optimal for existing SOT25 layouts needing proven field performance.
Availability
AP7370-50WR-7 is available at Aetrix Electronics and suitable for battery-powered instrumentation, portable medical devices, and industrial USB peripheral adapters requiring stable component supply and long-term manufacturing continuity.
Supply support for AP7370-50WR-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 solutions for power management, signal integrity, and connectivity applications.
The AP7370 series belongs to Diodes' high-performance ULDO regulator product line, engineered specifically for portable and battery-critical systems demanding wide input range, ultra-low IQ, and integrated protection features.
FAQ
Is AP7370-50WR-7 pin-compatible with other SOT25 LDOs?
No - AP7370-50WR-7 uses a nonstandard SOT25 pinout with pins 1=VIN, 2=GND, 3=NC, 4=VOUT, 5=NC. It is not compatible with common 3-pin SOT23 or standard 5-pin SOT25 regulators like the AP2112, which assign pin 3 to EN or ADJ. Layout reuse requires verification of terminal mapping per Diodes' DS41820 Rev. 2–3.
What is the minimum input voltage required for regulation at 5.0V output?
The AP7370-50WR-7 requires VIN ≥ 5.45V to maintain regulation at full 100mA load (based on 450mV dropout). Per datasheet Section 6, minimum input is specified as 3.2V, but that applies only at light loads (<10mA); for 300mA operation, VIN must exceed 5.6V to ensure stability and avoid dropout-induced output sag.
Does AP7370-50WR-7 require an external enable signal?
No - AP7370-50WR-7 has no enable (EN) pin and operates continuously when VIN is within specification. The "chip enable circuit" referenced in the datasheet is internal and always active; there is no provision for external control or shutdown. For on/off control, an upstream MOSFET switch is required.
Can AP7370-50WR-7 be used with tantalum output capacitors?
No - the datasheet explicitly specifies compatibility only with low-ESR ceramic capacitors (1.0µF minimum). Tantalum capacitors exhibit higher ESR and potential surge current risks during startup, which may cause instability or violate the 0.5% load regulation spec. Ceramic X5R/X7R types are mandatory for guaranteed performance.
AP7370-50WR-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):
- 18V
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.55V @ 100mA
- Current - Output:
- 300mA
- Current - Quiescent (Iq):
- 2.5 µA
- Current - Supply (Max):
- 300 µA
- PSRR:
- -
- Control Features:
- -
- Protection Features:
- Over Current, Over Temperature, Reverse Current, Short Circuit
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-25
AP7370-50WR-7 FAQ
1.How can I place an order for AP7370-50WR-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7370-50WR-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 AP7370-50WR-7 reliable?
The price and inventory of AP7370-50WR-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7370-50WR-7 is usually 5 days.
3.What payment methods are accepted for AP7370-50WR-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7370-50WR-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7370-50WR-7?
AP7370-50WR-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7370-50WR-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 AP7370-50WR-7?
For technical support, including AP7370-50WR-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7370-50WR-7 requirements.
6.How does Aetrix verify that AP7370-50WR-7 is sourced from the original manufacturer or authorized distributors?
All AP7370-50WR-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 AP7370-50WR-7 meets industry standards.
7.What is the process for return or replacement of AP7370-50WR-7?
All AP7370-50WR-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7370-50WR-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 AP7370-50WR-7 part is unused and in its original packaging.
Return procedure for AP7370-50WR-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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