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Diodes Incorporated AP7370-28Y-13
- Part No.:
- AP7370-28Y-13
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-243AA
- Datasheet:
-
AP7370-28Y-13.pdf
- Description:
- IC REG LINEAR 2.8V 300MA SOT89-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,777
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Product details
Overview
AP7370-28Y-13 from Diodes Incorporated is a fixed-output 2.8V, 300mA ultra-low dropout (ULDO) linear regulator in SOT89 package, featuring 500mV dropout at 100mA, ±1% output voltage accuracy (for VOUT > 2.5V), and 1.5–2.5µA quiescent current. It delivers stable power to low-power microcontrollers, sensors, and USB-peripheral circuitry in space-constrained portable instrumentation.
For engineers reviewing the AP7370-28Y-13 datasheet, AP7370-28Y-13 pinout, AP7370-28Y-13 application, or AP7370-28Y-13 equivalent, key selection criteria include input voltage range (3.2–18V), thermal shutdown threshold (+160°C), reverse current protection, compatibility with low-ESR ceramic capacitors, and SOT89 thermal resistance (θJA = 126°C/W).
Technical Context
The AP7370-28Y-13 integrates a precision voltage reference, error amplifier, and resistor network for fixed 2.8V output regulation. Its internal current limit circuit activates at 350mA (typ.) under dropout conditions, and reverse current protection prevents backflow when VOUT > VIN.
Thermal shutdown engages at +160°C with +20°C hysteresis, ensuring safe operation during sustained overload or high ambient temperature. Line regulation is 0.05%/V and load regulation is 0.5% across its full operating range, supporting stable rail integrity in battery-powered systems with variable load and input conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.8V ±1% (ensures precise biasing for 2.8V-tolerant logic and analog circuits) |
| Max Input Voltage | 18V (supports wide-range industrial and automotive-supplied inputs) |
| Dropout Voltage | 500mV @ 100mA (enables regulation down to VIN = 3.3V, critical for single-cell Li-ion or 3.3V system backup) |
| Quiescent Current | 1.5–2.5µA (minimizes standby power loss in always-on sensor nodes) |
| Current Limit | 350mA (protects IC and source during short-circuit without external foldback) |
| Thermal Shutdown | +160°C with +20°C hysteresis (prevents permanent damage during sustained overloads) |
| Reverse Current Protection | Integrated (eliminates need for external blocking diode in battery-backup paths) |
Pinout & Package
SOT89 package: 3-pin thermally enhanced plastic surface-mount package with exposed tab (EP) connected to GND for improved heat dissipation (θJA = 126°C/W, θJC = 26°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VIN | Main input supply connection; accepts 3.2–18V DC; requires local 1µF ceramic decoupling |
| 2 | GND | Power ground reference and thermal path; must be connected to large copper pour for thermal performance |
| 3 | VOUT | Regulated 2.8V output; drives load up to 300mA; stable with ≥1µF low-ESR ceramic capacitor |
Key Features
| Feature | Design Value |
|---|---|
| Wide input voltage range | 3.2V to 18V enables direct use with 12V rails, multi-cell batteries, or unregulated wall adapters |
| Ultra-low quiescent current | 1.5–2.5µA supports >10-year battery life in coin-cell-powered IoT endpoints |
| Low dropout voltage | 500mV @ 100mA allows operation with minimal headroom-critical for energy harvesting and low-VIN applications |
| Ceramic capacitor compatible | No ESR requirement eliminates need for tantalum or aluminum electrolytics, reducing BOM cost and footprint |
| Reverse current protection | Prevents VOUT-to-VIN backfeed in dual-supply or battery-swappable systems without external diode |
Applications
| Portable Weighing Scales | USB-Powered Test Instruments |
|---|---|
Use Scenario: Battery-operated handheld scale with 24-bit ADC, LCD, and Bluetooth LE module. IC Role / Device Role / Timing Role: Primary 2.8V supply for ADC reference, microcontroller I/O, and RF transceiver core logic. Use Value: Low dropout preserves regulation during battery discharge (down to ~3.3V), while µA quiescent current extends shelf life between calibrations. |
Use Scenario: Compact multimeter or oscilloscope probe powered via USB 5V bus. IC Role / Device Role / Timing Role: Generates clean 2.8V rail for precision analog front-end and low-noise op-amps. Use Value: Excellent line/load regulation (0.05%/V, 0.5%) maintains measurement accuracy despite USB port voltage sag under load. |
| Laptop Subsystem Power | Industrial Sensor Node |
Use Scenario: Always-on environmental monitoring subsystem in notebook chassis (e.g., lid-open detection, thermal management MCU). IC Role / Device Role / Timing Role: Standby LDO supplying real-time clock, accelerometer, and wake-up controller. Use Value: Reverse current protection isolates 2.8V rail from main 3.3V domain during sleep, preventing leakage-induced battery drain. |
Use Scenario: Wireless pressure/temperature node powered by primary lithium thionyl chloride cell (3.6V nominal). IC Role / Device Role / Timing Role: Regulates 2.8V for ultra-low-power MCU and LoRaWAN transceiver during periodic transmit bursts. Use Value: Thermal shutdown + hysteresis ensures reliable operation in sealed enclosures up to +85°C ambient without derating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ULDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1703T-2802E/MB | 2.8V fixed, 250mA, 600mV dropout @ 100mA, 3µA IQ, SOT23-3 | Lower current rating and higher dropout; smaller package but worse thermal performance (θJA = 205°C/W) | Select when board space is critical and peak load ≤250mA; verify thermal margin in enclosed environments. |
| TPS7A2028PDQNR | 2.8V fixed, 300mA, 170mV dropout @ 100mA, 6.5µA IQ, X2SON-4 | Lower dropout and higher IQ; no reverse current protection; requires external enable control for sequencing | Choose for ultra-low-headroom designs where VIN may dip below 3.0V; add external diode if reverse blocking is required. |
Compared with MCP1703T-2802E/MB, AP7370-28Y-13 delivers 50mA higher current and 100mV lower dropout in a thermally superior SOT89 package; versus TPS7A2028PDQNR, it trades 330mV higher dropout for integrated reverse current protection and simpler enable-free operation-ideal for cost-sensitive, robust portable designs.
Availability
AP7370-28Y-13 is available at Aetrix Electronics and suitable for portable instrumentation, USB-powered test equipment, and industrial sensor nodes requiring stable component supply with long-term manufacturability assurance.
Supply support for AP7370-28Y-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 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 AP7370 series belongs to Diodes' ultra-low dropout linear regulator product line, designed specifically for battery-powered and wide-input-voltage applications where low IQ, reverse current blocking, and robust thermal behavior are essential.
FAQ
Is AP7370-28Y-13 recommended for new designs?
No-Diodes Incorporated explicitly marks AP7370 as "NOT RECOMMENDED FOR NEW DESIGN" in its datasheet. It is intended for legacy design support and replacement only. New projects should consider the AP7375 series, which offers improved specifications and active design support.
What is the function of the NC pins in SOT25 variants, and does AP7370-28Y-13 have them?
AP7370-28Y-13 uses the SOT89-3 package, which has no NC pins. The NC designation applies only to SOT25 (5-pin) versions (pins 3/4 or 4/5), where they are internally unconnected and must be left floating or tied to GND per layout guidelines-no electrical function is assigned.
Can AP7370-28Y-13 operate with input voltage below 3.2V?
No-the Absolute Maximum Ratings table specifies 3.2V as the minimum recommended input voltage. Operation below this risks failure to regulate or undefined behavior, especially since dropout is only valid for VOUT ≥ 2.8V and VIN ≥ VOUT + headroom per datasheet Note 6.
Does AP7370-28Y-13 require an external enable signal to operate?
No-it has no enable (EN) pin and operates continuously when VIN is within specification. The SOT89 variant lacks chip-enable functionality; enable capability is only present in certain SOT25 configurations (e.g., AP7370-WR/WW), not in the Y-suffix SOT89 part.
AP7370-28Y-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):
- 2.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- -
- 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
AP7370-28Y-13 FAQ
1.How can I place an order for AP7370-28Y-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7370-28Y-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 AP7370-28Y-13 reliable?
The price and inventory of AP7370-28Y-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7370-28Y-13 is usually 5 days.
3.What payment methods are accepted for AP7370-28Y-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7370-28Y-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7370-28Y-13?
AP7370-28Y-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7370-28Y-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 AP7370-28Y-13?
For technical support, including AP7370-28Y-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7370-28Y-13 requirements.
6.How does Aetrix verify that AP7370-28Y-13 is sourced from the original manufacturer or authorized distributors?
All AP7370-28Y-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 AP7370-28Y-13 meets industry standards.
7.What is the process for return or replacement of AP7370-28Y-13?
All AP7370-28Y-13 units undergo pre-shipment inspection (PSI). If there is an issue with AP7370-28Y-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 AP7370-28Y-13 part is unused and in its original packaging.
Return procedure for AP7370-28Y-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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