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Diodes Incorporated AP7370-30WW-7
- Part No.:
- AP7370-30WW-7
- Manufacturer:
- Diodes Incorporated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AP7370-30WW-7.pdf
- Description:
- IC REG LINEAR 3V 300MA SOT25
- Quantity:
- Payment:
- Shipping:
Inventory:2,480
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Product details
Overview
AP7370-30WW-7 from Diodes Incorporated is a 3.0V fixed-output, 300mA ultra-low dropout (ULDO) linear regulator in SOT25 package, featuring 18V max input voltage, 500mV dropout at 100mA, ±1% output accuracy, and reverse current protection - deployed in portable instrumentation and battery-powered metering systems.
For engineers reviewing the AP7370-30WW-7 datasheet, AP7370-30WW-7 pinout, AP7370-30WW-7 application, or AP7370-30WW-7 equivalent, key selection criteria include wide VIN range (3.2–18V), thermal shutdown behavior, low quiescent current (1.5–2.5µA), and compatibility with low-ESR ceramic capacitors without external compensation.
Technical Context
The AP7370-30WW-7 integrates an error amplifier, precision voltage reference, resistor network for fixed 3.0V output, current-limit circuitry, and chip-enable logic - all operating within a -40°C to +125°C junction temperature range. Its architecture enables stable regulation under fast load transients while maintaining reverse current blocking.
It delivers 300mA output with dropout as low as 500mV at 100mA and supports input voltages up to 18V, making it suitable for single-cell Li-ion, multi-cell alkaline, or industrial 12V rail conditioning where headroom is constrained and EMI-sensitive analog sections require clean, low-noise supply.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.0V ±1% - ensures stable MCU core or sensor biasing without external feedback tuning |
| Max Input Voltage | 18V - supports direct connection to unregulated 12V/15V industrial rails or multi-cell battery stacks |
| Dropout Voltage | 500mV @ 100mA - enables >90% efficiency at 3.0V out from 3.5V input, critical for battery runtime extension |
| Quiescent Current | 1.5–2.5µA - minimizes standby power loss in always-on metering or IoT wake-up circuits |
| Current Limit | 350mA (typ.) - provides robust short-circuit protection without latch-off, enabling self-recovery operation |
| Thermal Shutdown | 160°C with 20°C hysteresis - prevents permanent damage during sustained overload or poor PCB heatsinking |
| Line Regulation | 0.05%/V - maintains tight output stability across wide input variations, e.g., 5V to 18V automotive transients |
Pinout & Package
SOT25 (WW) package: 5-pin surface-mount, thermally enhanced plastic body (3.0mm × 2.8mm × 1.3mm), exposed pad not electrically connected; RoHS 3 and halogen-free compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VIN | Main input supply connection; accepts 3.2–18V with internal overvoltage clamp |
| 2 | GND | Analog/digital ground reference; must be low-impedance path to minimize noise coupling |
| 3 | NC | No-connect terminal; left floating per fixed-output configuration - no routing required |
| 4 | VOUT | Regulated 3.0V output; requires ≥1µF ceramic capacitor (X5R/X7R) at device pin for stability |
| 5 | NC | No-connect terminal; electrically isolated - no trace or via connection permitted |
Key Features
| Feature | Design Value |
|---|---|
| Wide Input Range | 3.2V to 18V - eliminates need for pre-regulation stages in mixed-voltage systems |
| Reverse Current Protection | Blocks backfeed from VOUT to VIN - prevents battery drain when main supply disconnects |
| Low ESR Capacitor Support | Stable with ≥1µF X5R/X7R ceramics - reduces BOM count and board space vs. tantalum alternatives |
| Ultra-Low Ground Current | 1.5µA (no load) - extends shelf life and operational time in coin-cell–powered devices |
| Thermal & Short-Circuit Protection | Auto-recovery shutdown at 160°C and current limit at 350mA - ensures field reliability without external circuitry |
Applications
| Metering Systems | Weighing Scales |
|---|---|
|
Use Scenario: Precision ADC reference and microcontroller supply in handheld digital multimeters and energy meters. IC Role / Device Role / Timing Role: Primary 3.0V LDO supplying 16-bit SAR ADC, real-time clock, and low-power ARM Cortex-M0+ core. Use Value: ±1% output accuracy and 0.05%/V line regulation ensure measurement repeatability across battery discharge and line voltage fluctuations. |
Use Scenario: Load-cell signal conditioning and display controller power in portable retail and industrial scales. IC Role / Device Role / Timing Role: Clean 3.0V rail for instrumentation amplifier, sigma-delta ADC, and LCD driver IC. Use Value: Reverse current protection prevents load-cell bridge bias disruption during battery swap or hot-plug events. |
| Laptop Peripheral Modules | Portable Information Appliances |
|
Use Scenario: USB-powered docking accessories requiring regulated 3.0V for interface logic and flash memory. IC Role / Device Role / Timing Role: Post-regulator converting 5V USB input to 3.0V for USB PHY and EEPROM communication. Use Value: 500mV dropout enables full 3.0V output even as USB port voltage sags to 4.5V under load. |
Use Scenario: Power management in handheld barcode scanners and RFID readers with intermittent high-current bursts. IC Role / Device Role / Timing Role: Main system regulator delivering 300mA peak to laser diode driver and BLE SoC during scan cycles. Use Value: Thermal shutdown with 20°C hysteresis allows safe burst-mode operation without manual reset or firmware intervention. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ULDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP7375-30W5-7 | Successor part with same pinout; improved PSRR (65dB @ 1kHz), lower IQ (0.8µA), and extended temp range (−40°C to +150°C) | Preferred for new designs requiring higher noise immunity or extended temperature operation | Select AP7375 if designing for automotive cabin modules or industrial edge sensors needing tighter thermal margin |
| MCP1703T-3002E/MB | 300mA, 3.0V, 6µA IQ, 600mV dropout @ 250mA; SOT-23-5 package; no reverse current protection | Lacks reverse current blocking and has higher dropout - unsuitable for battery-backup or dual-supply systems | Choose only for cost-sensitive, non-battery-backed applications where reverse feed is physically impossible |
Compared with AP7370-30WW-7, AP7375-30W5-7 offers measurable PSRR and IQ improvements without layout change, while MCP1703T-3002E/MB trades protection features for lower unit cost in static supply environments.
Availability
AP7370-30WW-7 is available at Aetrix Electronics and suitable for metering systems, portable weighing equipment, laptop peripheral modules, and handheld information appliances requiring stable component supply amid evolving industrial sourcing constraints.
Supply support for AP7370-30WW-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 US, serving industrial, computing, and consumer markets.
The AP7370 series belongs to Diodes' high-reliability ULDO regulator product line, engineered specifically for battery-powered instrumentation and portable equipment demanding wide VIN, low IQ, and robust fault protection.
FAQ
Is AP7370-30WW-7 recommended for new designs?
No - Diodes explicitly marks AP7370 as "NOT RECOMMENDED FOR NEW DESIGN" and recommends AP7375 as its functional successor. The AP7370 remains available for legacy production and repair, but AP7375 offers improved PSRR, lower quiescent current, and extended temperature rating without pinout changes.
What capacitor values and types are required for stable operation?
A minimum 1.0µF X5R or X7R ceramic capacitor is required on both input (CIN) and output (COUT) pins. The datasheet confirms stability with low-ESR ceramics down to 5mΩ; tantalum or aluminum electrolytics are unnecessary and may degrade transient response due to higher ESR.
Does AP7370-30WW-7 support enable/disable control?
No - the AP7370-30WW-7 is a fixed-output version without an EN pin; it powers up whenever VIN exceeds ~3.2V. For controlled sequencing, designers must use external MOSFET gating on VIN or select the adjustable AP7370 variant with enable functionality (not offered in WW package).
How does thermal performance differ between SOT25 (WW) and U-DFN2020-6 packages?
SOT25 (WW) has θJA = 155°C/W; U-DFN2020-6 (Type C) achieves θJA = 54°C/W due to its exposed thermal pad. At 300mA and 15V input, the U-DFN version runs ~55°C cooler - critical for compact enclosures or stacked PCBs where airflow is restricted.
AP7370-30WW-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):
- 3V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.6V @ 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
AP7370-30WW-7 FAQ
1.How can I place an order for AP7370-30WW-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7370-30WW-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 AP7370-30WW-7 reliable?
The price and inventory of AP7370-30WW-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7370-30WW-7 is usually 5 days.
3.What payment methods are accepted for AP7370-30WW-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7370-30WW-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7370-30WW-7?
AP7370-30WW-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7370-30WW-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 AP7370-30WW-7?
For technical support, including AP7370-30WW-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7370-30WW-7 requirements.
6.How does Aetrix verify that AP7370-30WW-7 is sourced from the original manufacturer or authorized distributors?
All AP7370-30WW-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 AP7370-30WW-7 meets industry standards.
7.What is the process for return or replacement of AP7370-30WW-7?
All AP7370-30WW-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7370-30WW-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 AP7370-30WW-7 part is unused and in its original packaging.
Return procedure for AP7370-30WW-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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