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Diodes Incorporated AP7370-28FDC-7
- Part No.:
- AP7370-28FDC-7
- Manufacturer:
- Diodes Incorporated
- Package:
- 6-UDFN Exposed Pad
- Datasheet:
-
AP7370-28FDC-7.pdf
- Description:
- IC REG LINEAR 2.8V 300MA 6DFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,736
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Product details
Overview
AP7370-28FDC-7 from Diodes Incorporated is a fixed-output 2.8V, 300mA ultra-low dropout (ULDO) linear regulator in U-DFN2020-6 (Type C) package. It features 18V max input voltage, 500mV dropout at 100mA, ±1% output accuracy (for VOUT > 2.5V), reverse current protection, and 1.5–2.5µA quiescent current - enabling reliable power delivery in space-constrained portable instrumentation and battery-powered metering systems.
For engineers reviewing the AP7370-28FDC-7 datasheet, AP7370-28FDC-7 pinout, AP7370-28FDC-7 application, or AP7370-28FDC-7 equivalent, key selection criteria include its 2.8V fixed output, U-DFN2020-6 thermal performance (θJA = 54°C/W), low-noise operation with ceramic capacitors, and compatibility with input voltages up to 18V in compact industrial sensor nodes.
Technical Context
The AP7370-28FDC-7 integrates an error amplifier, precision voltage reference, resistor network for fixed 2.8V output, current-limit circuit (350mA min), and chip-enable logic. Its architecture supports stable regulation under fast load transients while maintaining reverse current blocking - critical for multi-rail systems where backfeeding must be prevented.
Thermal shutdown triggers at +160°C with +20°C hysteresis, and the device operates across –40°C to +125°C junction temperature. Input voltage range (3.2V–18V) and dropout behavior (valid only for VOUT ≥ 2.8V per datasheet Note 6) define its use in wide-input industrial supplies and legacy battery stacks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.8V ±1% (ensures stable MCU core or sensor bias without external feedback) |
| Max Input Voltage | 18V (supports 12V rail derating or 3S Li-ion battery input with margin) |
| Dropout Voltage | 500mV @ 100mA (enables 3.3V input → 2.8V output with 500mV headroom) |
| Quiescent Current | 1.5–2.5µA (extends battery life in always-on metering applications) |
| Current Limit | 350mA min (protects against short-circuit while sustaining 300mA continuous load) |
| Thermal Resistance | θJA = 54°C/W (U-DFN2020-6 package enables higher power density vs. SOT25) |
| ESD Rating | HBM 6000V (robust handling during PCB assembly and field operation) |
Pinout & Package
AP7370-28FDC-7 uses the U-DFN2020-6 (Type C) package - a 2.0mm × 2.0mm, 0.6mm height, thermally enhanced leadless package with exposed pad (EP) tied to GND for improved heat dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VIN | Main input supply connection; accepts 3.2–18V; requires local 1µF ceramic decoupling |
| 2 | GND | Analog ground reference; connects to EP for thermal and electrical integrity |
| 3 | VOUT | Regulated 2.8V output; stable with 1µF ceramic capacitor (low ESR compatible) |
| 4 | NC | No-connect terminal; electrically isolated; no internal connection |
| 5 | NC | No-connect terminal; electrically isolated; no internal connection |
| 6 | NC | No-connect terminal; electrically isolated; no internal connection |
| EP | GND | Exposed thermal pad; must be soldered to PCB GND plane for θJA = 54°C/W performance |
Key Features
| Feature | Design Value |
|---|---|
| Wide input range (up to 18V) | Enables single-regulator support for variable input sources including unregulated wall adapters and multi-cell batteries |
| Reverse current protection | Prevents backflow from VOUT to VIN when input is removed - essential in battery backup and hot-swap circuits |
| Ultra-low IQ (1.5–2.5µA) | Reduces standby power loss by >90% vs. standard LDOs, extending shelf life of portable test equipment |
| Thermal shutdown with hysteresis | +160°C trip with +20°C recovery prevents oscillation during sustained overload in enclosed enclosures |
| Ceramic capacitor compatible | Eliminates need for tantalum or electrolytic output caps - improves reliability and reduces board area |
Applications
| Metering Systems | Portable Weighing Scales |
|---|---|
|
Use Scenario: Precision analog front-end (AFE) and microcontroller power in handheld multimeters and clamp meters. IC Role / Device Role / Timing Role: Primary 2.8V bias regulator for ADC reference, op-amps, and low-power MCU cores. Use Value: ±1% output accuracy and <0.5% load regulation ensure consistent measurement resolution across battery discharge cycles. |
Use Scenario: Battery-powered digital weighing platforms requiring long operational life and stable sensor excitation. IC Role / Device Role / Timing Role: Fixed 2.8V supply for strain-gauge bridge interface ICs and display drivers. Use Value: 500mV dropout allows operation down to 3.3V battery voltage, extending usable runtime by ~18% vs. 600mV-dropout alternatives. |
| Laptop Subsystem Power | Industrial Sensor Nodes |
|
Use Scenario: Always-on auxiliary rail for embedded controller (EC) or secure element in notebook platforms. IC Role / Device Role / Timing Role: Low-quiescent 2.8V regulator for firmware storage and real-time clock (RTC) circuitry. Use Value: 1.5µA IQ minimizes battery drain during suspend-to-RAM, supporting >30-day shelf life on coin cell backup. |
Use Scenario: Remote environmental monitoring node powered by Li-SOCl₂ primary battery with 10+ year target life. IC Role / Device Role / Timing Role: Main 2.8V supply for ultra-low-power MCU, RF transceiver, and analog sensors. Use Value: Reverse current blocking prevents battery self-discharge through other system rails during deep sleep modes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed-output ULDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP7375-28W5-7 | Same architecture but in SOT25; higher θJA (155°C/W); no NC pins; 300mA rated | Less thermal headroom in high-density layouts; suitable for non-thermally constrained designs | Select when board layout lacks thermal pad capability or requires through-hole-compatible footprint |
| MCP1703T-2802E/MB | Microchip part; 250mA rating; 600mV dropout @ 250mA; 2.5µA IQ; SOT23-3 | Lower current capacity and higher dropout limit usable headroom in 3.3V-input systems | Choose for cost-sensitive, lower-current applications where 250mA suffices and SOT23-3 is preferred |
Compared with AP7370-28FDC-7, the AP7375-28W5-7 trades thermal performance for package simplicity, while the MCP1703T-2802E/MB offers broader vendor support but sacrifices 50mA current headroom and 100mV dropout margin - making the AP7370-28FDC-7 optimal for thermally demanding, high-accuracy 300mA metering rails.
Availability
AP7370-28FDC-7 is available at Aetrix Electronics and suitable for portable instrumentation, battery-powered metering, and industrial sensor nodes requiring stable component supply, long-lifecycle assurance, and RoHS-compliant packaging.
Supply support for AP7370-28FDC-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 AP7370 series belongs to Diodes' wide-input ULDO regulator product line, engineered specifically for USB-powered and portable instrumentation applications demanding precision, low IQ, and robust fault protection in minimal footprints.
FAQ
Is AP7370-28FDC-7 pin-compatible with other AP7370 variants?
No - AP7370-28FDC-7 uses the 6-pin U-DFN2020-6 (Type C) package with specific pin mapping (VIN, GND, VOUT, NC, NC, NC + EP). SOT23, SOT25, and SOT89 variants have different pin counts, assignments, and thermal pad requirements; direct replacement requires PCB redesign and layout validation.
What is the minimum input voltage required for regulation at 2.8V output?
The datasheet specifies a minimum input voltage of 3.2V for proper regulation. This ensures sufficient headroom above the 2.8V output to maintain stability and meet dropout specifications - especially critical under full load or elevated temperature conditions where dropout increases.
Does AP7370-28FDC-7 require an external enable signal?
No - AP7370-28FDC-7 has no enable pin and operates continuously when VIN is within specification. The "chip enable circuit" referenced in the datasheet is internal and not user-controllable; the device powers up automatically upon valid input application.
Can AP7370-28FDC-7 be used with aluminum polymer capacitors instead of ceramic?
While the datasheet validates performance with 1.0µF ceramic capacitors, aluminum polymer types may be used if ESR is ≤10mΩ and capacitance remains ≥1.0µF. However, ceramic is strongly recommended due to guaranteed stability, lower noise, and superior transient response - especially in precision metering applications.
AP7370-28FDC-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 6-UDFN Exposed Pad
- 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:
- U-DFN2020-6 (Type C)
AP7370-28FDC-7 FAQ
1.How can I place an order for AP7370-28FDC-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7370-28FDC-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 AP7370-28FDC-7 reliable?
The price and inventory of AP7370-28FDC-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7370-28FDC-7 is usually 5 days.
3.What payment methods are accepted for AP7370-28FDC-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7370-28FDC-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7370-28FDC-7?
AP7370-28FDC-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7370-28FDC-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 AP7370-28FDC-7?
For technical support, including AP7370-28FDC-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7370-28FDC-7 requirements.
6.How does Aetrix verify that AP7370-28FDC-7 is sourced from the original manufacturer or authorized distributors?
All AP7370-28FDC-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 AP7370-28FDC-7 meets industry standards.
7.What is the process for return or replacement of AP7370-28FDC-7?
All AP7370-28FDC-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7370-28FDC-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 AP7370-28FDC-7 part is unused and in its original packaging.
Return procedure for AP7370-28FDC-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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