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Diodes Incorporated AP7370-28W5-7
- Part No.:
- AP7370-28W5-7
- Manufacturer:
- Diodes Incorporated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AP7370-28W5-7.pdf
- Description:
- IC REG LINEAR 2.8V 300MA SOT25
- Quantity:
- Payment:
- Shipping:
Inventory:1,456
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Product details
Overview
AP7370-28W5-7 from Diodes Incorporated is a fixed-output 2.8V, 300mA ultra-low dropout (ULDO) linear regulator in SOT25 package, featuring 18V max input voltage, 500mV dropout at 100mA, ±1% output accuracy, reverse current protection, and 1.5–2.5µA quiescent current - optimized for USB-powered instrumentation and portable battery-operated devices.
For engineers reviewing the AP7370-28W5-7 datasheet, AP7370-28W5-7 pinout, AP7370-28W5-7 application, or AP7370-28W5-7 equivalent, this page delivers verified electrical specs, thermal behavior, load/line regulation performance, SOT25 pin mapping, and real-world use cases in metering and portable computing where low IQ and wide VIN tolerance are critical.
Technical Context
The AP7370-28W5-7 integrates a precision voltage reference, error amplifier, and current-limit circuit to maintain stable 2.8V output across -40°C to +125°C junction temperature with ≤0.5% load regulation (1mA–300mA) and 0.05%/V line regulation. Its internal thermal shutdown triggers at +160°C with +20°C hysteresis.
Designed for ceramic-capacitor compatibility, it achieves stable operation with 1.0µF input/output capacitors and blocks reverse current flow when VOUT > VIN - eliminating external blocking diodes in battery-backup or dual-supply systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.8V ±1% (ensures consistent biasing for 2.8V logic or analog sensors) |
| Max Input Voltage | 18V (supports direct connection to unregulated 12V rails or automotive transients) |
| Dropout Voltage | 500mV @ 100mA (enables regulation down to VIN = 3.3V, extending battery runtime) |
| Quiescent Current | 1.5–2.5µA (minimizes standby power loss in always-on metering circuits) |
| Current Limit | 350mA min (protects IC and source during short-circuit without latch-off) |
| Thermal Shutdown | Triggers at +160°C with +20°C hysteresis (prevents permanent damage during sustained overload) |
| Reverse Current Protection | Active (eliminates need for external Schottky diode in backup-power paths) |
Pinout & Package
SOT25 (W5) package: 5-pin surface-mount, thermally enhanced plastic body (3.0mm × 2.8mm × 1.3mm), RoHS-compliant, halogen-free, with exposed pad not electrically connected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VIN | Main input supply connection; accepts up to 18V DC with transient robustness |
| 2 | GND | Power ground reference; ties to PCB ground plane for thermal and noise control |
| 3 | NC | No-connect pin; must be left floating (not tied to GND or any signal) |
| 4 | VOUT | Regulated 2.8V output; requires ≥1.0µF ceramic capacitor for stability |
| 5 | NC | No-connect pin; must be left floating (no internal connection or function) |
Key Features
| Feature | Design Value |
|---|---|
| Wide input range (3.2–18V) | Enables single-regulator support across multiple input sources: Li-ion, USB, 12V adapters, and industrial rails |
| Ultra-low IQ (1.5–2.5µA) | Extends battery life in portable weighing scales by reducing standby current by >90% vs. standard LDOs |
| Low dropout (500mV @ 100mA) | Maintains regulation through deep battery discharge (e.g., down to 3.3V on 3.7V Li-ion) |
| Reverse current blocking | Prevents backfeed from VOUT to VIN in dual-supply or hot-swap configurations without added components |
| Thermal + short-circuit protection | Self-protects under fault conditions while retaining restart capability after cooldown |
Applications
| Metering Systems | Portable Weighing Scales |
|---|---|
|
Use Scenario: Precision digital multimeters and energy meters powered by 9V alkaline or rechargeable packs. IC Role / Device Role / Timing Role: Primary 2.8V supply for ADC reference, microcontroller core, and display driver. Use Value: ±1% output accuracy ensures measurement repeatability; 1.5µA IQ extends battery life to >12 months in sleep mode. |
Use Scenario: Handheld food or industrial scales using single-cell Li-ion or AA batteries. IC Role / Device Role / Timing Role: Stable 2.8V rail for load-cell signal conditioning and low-power MCU operation. Use Value: 500mV dropout allows full utilization of battery voltage down to 3.3V, increasing usable capacity by ~18%. |
| Laptop Peripheral Modules | USB-Powered Instrumentation |
|
Use Scenario: Docking accessories (e.g., USB-C monitor hubs) requiring clean 2.8V for interface ICs. IC Role / Device Role / Timing Role: Post-regulation supply for USB PD controller logic and level shifters. Use Value: Excellent line regulation (0.05%/V) rejects USB input ripple; reverse current protection isolates VBUS from peripheral rails. |
Use Scenario: Portable oscilloscope probes or sensor data loggers drawing power directly from USB 5V. IC Role / Device Role / Timing Role: Low-noise 2.8V source for analog front-end amplifiers and precision references. Use Value: Low ground current and ceramic-capacitor compatibility minimize board area and EMI in compact enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ULDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP7375-28W5-7 | Successor device with same pinout; improved PSRR (60dB @ 1kHz vs. 45dB), lower dropout (400mV @ 100mA), and extended temp range (−40°C to +150°C). | Recommended for new designs requiring higher noise immunity or automotive-qualified operation. | Select AP7375-28W5-7 if upgrading from AP7370; identical footprint enables drop-in replacement with performance gain. |
| MCP1700T-2802E/TT | 250mA rated, 6V max VIN, 1.6µA IQ, but lacks reverse current protection and thermal shutdown. | Suitable only for low-power, non-safety-critical consumer accessories with tightly regulated input. | Choose only if input never exceeds 6V and reverse feed risk is absent; verify external protection is implemented. |
Compared with AP7370-28W5-7, AP7375-28W5-7 delivers measurable PSRR and thermal margin improvements without layout change, while MCP1700T-2802E/TT trades protection features for lower cost in benign-input environments.
Availability
AP7370-28W5-7 is available at Aetrix Electronics and suitable for metering systems, portable weighing scales, laptop peripheral modules, and USB-powered instrumentation requiring stable component supply with long-term sourcing continuity.
Supply support for AP7370-28W5-7 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 ICs, with design centers across Asia, Europe, and the U.S., serving industrial, computing, and consumer markets.
The AP7370 series belongs to Diodes' high-reliability linear regulator product line, engineered specifically for battery-powered and wide-input industrial applications demanding low IQ, robust protection, and tight DC accuracy.
FAQ
What is the maximum allowable input voltage for AP7370-28W5-7?
The absolute maximum input voltage is 20V, but the recommended operating range is 3.2V to 18V per the datasheet. Operation above 18V risks exceeding safe power dissipation limits and may trigger thermal shutdown prematurely, especially at high ambient temperatures or elevated load currents.
Does AP7370-28W5-7 require an external capacitor on the VOUT pin?
Yes - a minimum 1.0µF ceramic capacitor is required on VOUT for stability and transient response, as confirmed in the Electrical Characteristics table and Typical Applications Circuit. Lower ESR values improve load step recovery, and X5R/X7R dielectrics are recommended for temperature stability.
Is AP7370-28W5-7 pin-compatible with other regulators in the AP737x family?
Yes - all AP7370 variants in SOT25 (W5/WR/WW) share identical pinout and footprint. However, AP7375-28W5-7 is the designated pin-compatible successor with enhanced specs; AP7360 or AP2202K are not compatible due to differing pin assignments and protection features.
Why is AP7370 marked "NOT RECOMMENDED FOR NEW DESIGN"?
This designation reflects Diodes' formal obsolescence notice: AP7375 is the approved replacement with improved PSRR, lower dropout, and extended temperature rating. While AP7370-28W5-7 remains fully functional and supported for existing designs, new projects should adopt AP7375-28W5-7 to ensure long-term supply and performance alignment.
AP7370-28W5-7 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):
- 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-25
AP7370-28W5-7 FAQ
1.How can I place an order for AP7370-28W5-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7370-28W5-7 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 AP7370-28W5-7 reliable?
The price and inventory of AP7370-28W5-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7370-28W5-7 is usually 5 days.
3.What payment methods are accepted for AP7370-28W5-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7370-28W5-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7370-28W5-7?
AP7370-28W5-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7370-28W5-7 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 AP7370-28W5-7?
For technical support, including AP7370-28W5-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7370-28W5-7 requirements.
6.How does Aetrix verify that AP7370-28W5-7 is sourced from the original manufacturer or authorized distributors?
All AP7370-28W5-7 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 AP7370-28W5-7 meets industry standards.
7.What is the process for return or replacement of AP7370-28W5-7?
All AP7370-28W5-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7370-28W5-7, 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 AP7370-28W5-7 part is unused and in its original packaging.
Return procedure for AP7370-28W5-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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