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Diodes Incorporated AP7370-50Y-13
- Part No.:
- AP7370-50Y-13
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-243AA
- Datasheet:
-
AP7370-50Y-13.pdf
- Description:
- IC REG LINEAR 5V 300MA SOT89-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,767
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Product details
Overview
AP7370-50Y-13 from Diodes Incorporated is a 5.0V fixed-output, 300mA ultra-low dropout (ULDO) linear regulator in SOT89 package, featuring 18V max input voltage, 450mV dropout at 100mA, ±1% output accuracy, reverse current protection, and thermal shutdown-designed for stable power delivery in portable instrumentation and battery-powered metering systems.
For engineers reviewing the AP7370-50Y-13 datasheet, AP7370-50Y-13 pinout, AP7370-50Y-13 application, or AP7370-50Y-13 equivalent, this page delivers verified electrical specs, validated SOT89 terminal mapping, real-world load regulation performance, and direct-fit alternatives for legacy design continuity and supply chain resilience.
Technical Context
The AP7370-50Y-13 integrates a precision voltage reference, error amplifier, and current-limit circuit to maintain regulated 5.0V output across 3.2–18V input range. Its internal architecture enables operation with low-ESR ceramic capacitors and supports reverse current blocking without external diodes.
Thermal shutdown triggers at +160°C with +20°C hysteresis, and line/load regulation remain within ±0.05%/V and ±0.5%, respectively-ensuring stable output under dynamic load transients and wide input fluctuations typical in USB-powered and handheld test equipment.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.0V ±1% - ensures compatibility with 5V logic and analog subsystems without external trimming |
| Max Input Voltage | 18V - supports unregulated 12V rail or automotive-derived inputs with margin |
| Dropout Voltage | 450mV @ 100mA - enables 5V output from 5.45V minimum input, critical for battery discharge tracking |
| Ground Current | 2.5µA @ no load / 300µA @ 300mA - minimizes standby power loss in always-on metering circuits |
| Current Limit | 350mA - provides robust short-circuit protection while sustaining full rated load under worst-case thermal conditions |
| Line Regulation | ±0.05%/V - maintains tight output stability across wide input variation, reducing need for post-regulation filtering |
| Thermal Shutdown | +160°C with +20°C hysteresis - prevents latch-up during sustained overload and enables safe auto-recovery |
Pinout & Package
SOT89 package: 3-pin thermally enhanced plastic outline with exposed tab (EP) internally connected to GND, enabling efficient heat dissipation in compact PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VOUT | Regulated 5.0V output node; requires ≥1µF ceramic capacitor for stability |
| 2 | NC | No connection - electrically isolated; must not be tied to any net |
| 3 | VIN | Main input supply (3.2–18V); routed with low-inductance path to minimize noise coupling |
| EP (Exposed Pad) | GND | Primary thermal and electrical ground path; must be soldered to ≥100mm² copper pour for θJA ≤126°C/W |
Key Features
| Feature | Design Value |
|---|---|
| Wide Input Range | 3.2V to 18V - eliminates need for pre-regulator in multi-battery or adapter-fed systems |
| Reverse Current Protection | Integrated blocking - prevents backfeed from VOUT to VIN when input is removed, protecting upstream sources |
| Ultra-Low Quiescent Current | 1.5–2.5µA - extends battery life in sleep-mode portable instruments beyond 10 years |
| Ceramic Capacitor Compatible | Stable with ≥1µF X5R/X7R - reduces BOM count and board space vs. tantalum or electrolytic solutions |
| Thermal Shutdown + Hysteresis | +160°C trip / +140°C recovery - avoids oscillation during intermittent overloads in sealed enclosures |
Applications
| Portable Digital Multimeters | Battery-Powered Weighing Scales |
|---|---|
Use Scenario: Precision ADC reference and microcontroller core supply in handheld DMMs operating from 2×AA or 9V batteries. IC Role / Device Role / Timing Role: Primary 5V ULDO regulator delivering clean, low-noise power to 16-bit SAR ADC and low-power MCU. Use Value: 0.5% load regulation and <2.5µA quiescent current enable >500-hour battery life and sub-LSB measurement stability. |
Use Scenario: Powering strain-gauge interface, display driver, and BLE radio in consumer-grade kitchen scales. IC Role / Device Role / Timing Role: Single-point 5V regulator supplying analog front-end and digital subsystems from single Li-ion cell with boost converter. Use Value: 450mV dropout allows usable runtime down to 3.7V battery voltage, extending operational window by 18% vs. standard LDOs. |
| Laptop Peripheral Adapters | Industrial Panel Meters |
Use Scenario: USB-C powered accessories (e.g., HDMI dongles, docking hubs) requiring clean 5V rail from variable-input PD sources. IC Role / Device Role / Timing Role: Post-regulator stabilizing negotiated USB PD voltage to fixed 5V for downstream ICs. Use Value: Reverse current protection prevents backdrive into USB PD controller during hot-plug events, meeting USB-IF compliance requirements. |
Use Scenario: Front-panel display and sensor interface in DIN-rail mounted energy meters with 12–24V DC auxiliary input. IC Role / Device Role / Timing Role: Isolated 5V supply for LCD controller and optical isolation barrier drivers. Use Value: 18V max input and thermal shutdown ensure reliable operation in high-ambient industrial cabinets up to +70°C ambient. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 5V ULDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP7375-50Y-13 | Successor part with improved 300mV dropout @ 100mA and tighter ±0.5% output tolerance | Same SOT89 footprint and pinout; supports higher efficiency in low-VIN battery designs | Select for new designs requiring lower dropout and enhanced accuracy; pin-compatible drop-in replacement |
| MCP1703T-5002E/MB | Microchip 5V LDO with 600mV dropout @ 250mA and 2.5µA IQ, but no reverse current protection | Requires external Schottky diode for backfeed prevention; lacks thermal hysteresis | Use only where reverse current blocking is handled externally and thermal recovery behavior is not critical |
Compared with AP7370-50Y-13, AP7375-50Y-13 delivers measurable efficiency gain below 5.5V input, while MCP1703T-5002E/MB trades integrated protection for broader temperature qualification (–40°C to +125°C), making it suitable only where system-level safeguards compensate for missing features.
Availability
AP7370-50Y-13 is available at Aetrix Electronics and suitable for portable instrumentation, battery-powered weighing systems, and industrial panel meters requiring stable component supply with long-term lifecycle visibility.
Supply support for AP7370-50Y-13 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 across Asia, Europe, and the US, serving industrial, computing, and consumer markets.
The AP7370 series belongs to Diodes' high-voltage ULDO regulator product line, engineered specifically for USB-powered and battery-operated instrumentation where wide VIN range and ultra-low IQ are mandatory.
FAQ
What is the maximum allowable input voltage for AP7370-50Y-13?
The absolute maximum input voltage is 20V, but the recommended operating range is 3.2V to 18V per datasheet Section 5. Exceeding 18V risks exceeding internal transistor breakdown limits and invalidates parametric guarantees-even if thermal limits are observed.
Does AP7370-50Y-13 require an input capacitor?
Yes-a minimum 1.0µF ceramic capacitor is required at VIN to suppress high-frequency noise and prevent oscillation. The datasheet specifies CIN = COUT = 1.0µF X5R/X7R for all electrical characteristics testing, and omitting it degrades line regulation and transient response.
Can AP7370-50Y-13 be used with tantalum output capacitors?
No-the device is optimized for low-ESR ceramic capacitors only. Tantalum capacitors exhibit higher ESR and potential failure modes under surge conditions; using them violates stability criteria and voids guaranteed performance, including dropout and load regulation specs.
Is the exposed pad (EP) on SOT89 electrically connected?
Yes-the EP is internally bonded to GND and must be soldered to a dedicated PCB ground plane. Leaving it floating increases thermal resistance by >40%, causing premature thermal shutdown at ~200mA load; it also degrades EMI performance due to uncontrolled return path inductance.
AP7370-50Y-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-243AA
- 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-89-3
AP7370-50Y-13 FAQ
1.How can I place an order for AP7370-50Y-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7370-50Y-13 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 AP7370-50Y-13 reliable?
The price and inventory of AP7370-50Y-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7370-50Y-13 is usually 5 days.
3.What payment methods are accepted for AP7370-50Y-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7370-50Y-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7370-50Y-13?
AP7370-50Y-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7370-50Y-13 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 AP7370-50Y-13?
For technical support, including AP7370-50Y-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7370-50Y-13 requirements.
6.How does Aetrix verify that AP7370-50Y-13 is sourced from the original manufacturer or authorized distributors?
All AP7370-50Y-13 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 AP7370-50Y-13 meets industry standards.
7.What is the process for return or replacement of AP7370-50Y-13?
All AP7370-50Y-13 units undergo pre-shipment inspection (PSI). If there is an issue with AP7370-50Y-13, 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 AP7370-50Y-13 part is unused and in its original packaging.
Return procedure for AP7370-50Y-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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