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Diodes Incorporated AP7370-30WR-7
- Part No.:
- AP7370-30WR-7
- Manufacturer:
- Diodes Incorporated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AP7370-30WR-7.pdf
- Description:
- IC REG LINEAR 3V 300MA SOT25
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
AP7370-30WR-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 AP7370-30WR-7 datasheet, AP7370-30WR-7 pinout, AP7370-30WR-7 application, or AP7370-30WR-7 equivalent, this page delivers verified electrical specs, thermal behavior, real-world load transient response, and validated alternative selection guidance for USB-powered and low-power embedded designs.
Technical Context
The AP7370-30WR-7 integrates a precision voltage reference, error amplifier, resistor network for fixed 3.0V output, current-limit circuitry, and chip-enable logic - all operating within a 3.2–18V input range while maintaining regulation down to 500mV dropout. Its architecture supports stable operation with 1µF ceramic capacitors on both input and output.
It implements thermal shutdown at +160°C with +20°C hysteresis, reverse current protection to prevent backfeed during shutdown, and delivers <2.5µA quiescent current at zero load - enabling long battery life in always-on portable equipment where supply rail integrity and leakage control are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.0V ±1% (ensures stable MCU core or sensor bias under line/load variation) |
| Max Input Voltage | 18V (supports wide-range industrial or automotive-derived supplies without external pre-regulation) |
| Dropout Voltage | 500mV @ 100mA (enables regulation from 3.5V input, critical for single-cell LiFePO₄ or dual-cell alkaline systems) |
| Quiescent Current | 1.5–2.5µA @ IOUT = 0A (minimizes standby power loss in battery-backed data loggers) |
| Current Limit | 350mA (protects internal pass element during short-circuit or overload without latch-up) |
| Thermal Shutdown | +160°C with +20°C hysteresis (prevents permanent damage during sustained high-temperature operation) |
| ESD Rating | HBM: 6000V, CDM: 1500V (robust handling in automated assembly and field-replaceable modules) |
Pinout & Package
SOT25 (WR) 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 up to 18V DC 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 feedback required) |
| 4 | VOUT | Regulated 3.0V output; requires ≥1µF ceramic capacitor for stability and transient response |
| 5 | NC | No-connect terminal; electrically isolated; no routing or soldering required |
Key Features
| Feature | Design Value |
|---|---|
| Wide Input Range (3.2–18V) | Eliminates need for upstream buck converter in multi-battery or unregulated adapter applications |
| Ultra-Low Quiescent Current (≤2.5µA) | Extends battery runtime in always-on devices such as portable scales and handheld meters |
| Reverse Current Protection | Blocks backflow from VOUT to VIN during shutdown or input removal - prevents system-level rail collapse |
| Low ESR Ceramic Cap Compatible | Enables use of compact, high-reliability 0402/0603 MLCCs instead of bulkier tantalum or aluminum electrolytics |
| Thermal Shutdown + Hysteresis | Self-recovering protection that avoids oscillation during thermal overload events |
Applications
| Portable Weighing Scales | Battery-Powered Data Loggers |
|---|---|
|
Use Scenario: Compact digital kitchen or industrial bench scales powered by two AA batteries with sleep-mode operation. IC Role / Device Role / Timing Role: Primary 3.0V supply for load-cell ADC, microcontroller, and display driver - active only during measurement cycles. Use Value: 2.5µA quiescent current extends shelf life beyond 2 years; 500mV dropout enables full-scale operation until battery drops to ~3.5V. |
Use Scenario: Remote environmental sensor node logging temperature/humidity every 10 minutes using CR2032 coin cell. IC Role / Device Role / Timing Role: Regulated 3.0V rail for ultra-low-power MCU and serial flash memory during brief wake-up bursts. Use Value: Reverse current protection prevents battery drain when VOUT is externally pulled high during communication; ±1% accuracy ensures consistent ADC reference. |
| Laptop Peripheral Adapters | USB-Powered Test Instruments |
|
Use Scenario: USB-C to RS-232/RS-485 adapter drawing power solely from USB bus (5V±5%) with internal 3.0V logic rail. IC Role / Device Role / Timing Role: Post-regulator converting noisy USB 5V to clean 3.0V for UART transceivers and level shifters. Use Value: Excellent line regulation (0.05%/V) suppresses USB voltage ripple; thermal shutdown protects against enclosure overheating during continuous data transfer. |
Use Scenario: Handheld multimeter or oscilloscope probe interface powered via USB or internal Li-ion battery. IC Role / Device Role / Timing Role: Precision 3.0V reference source for analog front-end and calibration circuitry. Use Value: ±100ppm/°C tempco ensures <0.1% output drift across -40°C to +85°C operating range; low noise supports sub-mV measurement resolution. |
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 device with same pinout; improved PSRR (65dB @ 1kHz vs 55dB), lower dropout (400mV @ 100mA), and extended temp range (−40°C to +125°C). | Recommended for new designs requiring higher noise immunity or tighter thermal margin; not drop-in compatible due to different enable logic polarity. | Select AP7375 if designing for production beyond Q3 2025; AP7370 remains viable for legacy BOM continuity and cost-sensitive replacements. |
| MCP1703T-3002E/MB | Microchip 3.0V LDO; 6V max input, 600mV dropout @ 250mA, 2.5µA IQ, but lacks reverse current protection and thermal hysteresis. | Suitable for low-input-voltage consumer accessories where input never exceeds 6V and backfeed risk is absent. | Choose only if input stays ≤6V and board layout isolates VOUT from external pull-ups; avoid in shared-rail or battery-swappable systems. |
Compared with AP7370-30WR-7, AP7375 offers superior PSRR and thermal resilience for next-gen portable instruments, while MCP1703T provides lower-cost support for fixed 5V-input accessories - but neither matches the AP7370's combination of 18V tolerance, reverse-current blocking, and validated metering performance.
Availability
AP7370-30WR-7 is available at Aetrix Electronics and suitable for portable weighing scales, USB-powered test adapters, and battery-operated data loggers requiring stable component supply with long-term lifecycle visibility.
Supply support for AP7370-30WR-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 for power management, signal integrity, and connectivity applications.
The AP7370 belongs to Diodes' wide-input ULDO regulator product line, engineered specifically for battery-powered instrumentation, portable medical devices, and industrial handheld equipment demanding high accuracy and ultra-low quiescent current.
FAQ
What is the maximum allowable input voltage for AP7370-30WR-7?
The absolute maximum input voltage is 20V, but the recommended operating range is 3.2V to 18V. Operation above 18V risks exceeding internal voltage ratings and may trigger thermal shutdown or degrade long-term reliability. Designers should maintain ≥0.5V margin below 18V for safety-critical applications.
Does AP7370-30WR-7 require an external enable signal?
No - the AP7370-30WR-7 has no enable pin and operates continuously when VIN is within specification. It is a permanently enabled fixed-output regulator; the "WR" suffix denotes SOT25 packaging with pins 1–5 assigned as VIN/GND/NC/VOUT/NC. No external control logic is needed.
Can AP7370-30WR-7 drive a 300mA load continuously?
Yes - it is rated for 300mA continuous output current under TJ ≤ +125°C with adequate PCB copper area. At 300mA and 18V input, power dissipation reaches ~4.5W; thermal design must ensure θJA ≤ 54°C/W (U-DFN2020-6) or ≤155°C/W (SOT25) to avoid thermal shutdown.
Is AP7370-30WR-7 compatible with 1µF ceramic output capacitors?
Yes - the datasheet explicitly specifies stability with ≥1.0µF X5R/X7R ceramic capacitors (ESR < 100mΩ). Unlike older LDOs, it does not require series resistance or tantalum capacitors, enabling smaller footprint and higher reliability in space-constrained portable designs.
AP7370-30WR-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
AP7370-30WR-7 FAQ
1.How can I place an order for AP7370-30WR-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7370-30WR-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 AP7370-30WR-7 reliable?
The price and inventory of AP7370-30WR-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7370-30WR-7 is usually 5 days.
3.What payment methods are accepted for AP7370-30WR-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7370-30WR-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7370-30WR-7?
AP7370-30WR-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7370-30WR-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 AP7370-30WR-7?
For technical support, including AP7370-30WR-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7370-30WR-7 requirements.
6.How does Aetrix verify that AP7370-30WR-7 is sourced from the original manufacturer or authorized distributors?
All AP7370-30WR-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 AP7370-30WR-7 meets industry standards.
7.What is the process for return or replacement of AP7370-30WR-7?
All AP7370-30WR-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7370-30WR-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 AP7370-30WR-7 part is unused and in its original packaging.
Return procedure for AP7370-30WR-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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