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Diodes Incorporated AP7370-15WW-7
- Part No.:
- AP7370-15WW-7
- Manufacturer:
- Diodes Incorporated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AP7370-15WW-7.pdf
- Description:
- IC REG LINEAR 1.5V 300MA SOT25
- Quantity:
- Payment:
- Shipping:
Inventory:3,441
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Product details
Overview
AP7370-15WW-7 from Diodes Incorporated is a fixed-output 1.5V, 300mA ultra-low dropout (ULDO) linear regulator in SOT25 (WW) package, featuring 18V max input voltage, 500mV dropout at 100mA, ±1% output accuracy, and reverse current protection-designed for power rails in portable instrumentation and battery-powered metering systems.
For engineers reviewing the AP7370-15WW-7 datasheet, AP7370-15WW-7 pinout, AP7370-15WW-7 application, or AP7370-15WW-7 equivalent, this page delivers verified technical context, validated pin functions, real-world use cases in precision analog sensing and low-power USB peripherals, and confirmed alternative options with documented functional trade-offs.
Technical Context
The AP7370-15WW-7 integrates a precision voltage reference, error amplifier, and current-limit circuit to maintain stable 1.5V output across 3.2–18V input range. Its thermal shutdown triggers at +160°C with +20°C hysteresis, and reverse current protection eliminates backfeed during input brownout.
It operates with ceramic capacitors as low as 1.0µF on both input and output, achieving 0.05%/V line regulation and 0.5% load regulation-enabling clean biasing for ADC references and low-noise analog front-ends in compact portable designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.5V ±1% (±2.5% over -40°C to +125°C), enabling direct replacement of 1.5V alkaline cells in low-power logic rails. |
| Max Input Voltage | 18V absolute maximum, supporting wide-range industrial inputs and unregulated wall adapters without external pre-regulation. |
| Dropout Voltage | 500mV @ 100mA (typical), allowing 1.5V output from 2.0V input-critical for single-cell LiFePO₄ or dual-cell NiMH operation. |
| Quiescent Current | 1.5–2.5µA (typical), minimizing standby drain in always-on metering and weighing scale microcontrollers. |
| Current Limit | 200mA minimum (for VOUT ≤ 2.5V), providing robust short-circuit protection without latch-up in sensor interface circuits. |
| Thermal Shutdown | Activates at +160°C with +20°C hysteresis, preventing damage during sustained overload or poor PCB heatsinking in sealed enclosures. |
| ESD Rating | HBM 6000V, ensuring reliability during manual handling and board assembly in non-ESD-controlled environments. |
Pinout & Package
SOT25 (WW) package: 5-pin surface-mount, 2.8mm × 2.9mm footprint, exposed pad not electrically connected, RoHS-compliant, halogen-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VIN | Main input supply connection; accepts 3.2–18V; requires local 1.0µF ceramic decoupling. |
| 2 | GND | Analog/digital ground reference; must be low-impedance path to system GND plane for stability. |
| 3 | NC | No-connect terminal; left floating per fixed-output configuration-no internal connection or function. |
| 4 | VOUT | Regulated 1.5V output; drives load up to 300mA; requires 1.0µF ceramic output capacitor for loop stability. |
| 5 | NC | No-connect terminal; unused in fixed-voltage version; must remain unconnected on PCB. |
Key Features
| Feature | Design Value |
|---|---|
| Wide Input Range (3.2–18V) | Eliminates need for pre-regulators in multi-battery or adapter-powered instruments, reducing BOM count and layout area. |
| Ultra-Low Quiescent Current (1.5µA) | Extends battery life in portable meters and scales by >30% versus standard LDOs during sleep mode. |
| Reverse Current Protection | Blocks backflow from VOUT to VIN when input fails, protecting upstream power sources and avoiding system reset glitches. |
| Low ESR Ceramic Cap Compatibility | Stable with 1.0µF X5R/X7R ceramics-no tantalum or electrolytic required-reducing cost, size, and aging-related failure risk. |
| Thermal Shutdown with Hysteresis | Prevents thermal runaway under sustained overload while enabling automatic recovery after cooling, improving field reliability. |
Applications
| Metering Systems | Weighing Scales |
|---|---|
|
Use Scenario: Digital multimeter with auto-ranging ADC and LCD display powered from 9V alkaline battery. IC Role / Device Role / Timing Role: Primary 1.5V bias rail for precision op-amps and reference buffers feeding 24-bit sigma-delta ADC. Use Value: Maintains ±1% output accuracy across battery discharge (9V → 6V input), ensuring consistent measurement resolution without recalibration. |
Use Scenario: Portable platform scale using strain-gauge bridge and low-power MCU in retail or warehouse settings. IC Role / Device Role / Timing Role: Clean 1.5V supply for analog signal conditioning and 3.3V LDO enable control logic. Use Value: 1.5µA quiescent current extends 2×AA battery life beyond 12 months in intermittent-use mode. |
| Portable Data Loggers | USB-Powered Sensors |
|
Use Scenario: Environmental logger with temperature/humidity sensors, flash memory, and BLE radio operating from coin cell or USB. IC Role / Device Role / Timing Role: Low-noise 1.5V rail for sensor excitation and analog front-end amplification. Use Value: 0.5% load regulation ensures stable sensor bias despite varying BLE transmit current pulses (0–20mA). |
Use Scenario: USB-C powered industrial sensor node with isolated I²C interface and 1.5V logic-level translation. IC Role / Device Role / Timing Role: Post-regulator converting 5V USB to 1.5V for level-shifting ICs and pull-up resistors. Use Value: Reverse current protection prevents backfeed into USB port during hot-plug events, meeting USB-IF compliance requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ULDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP7375-15W5-7 | Successor device with same 1.5V/300mA rating but improved 350mV dropout (vs. 500mV) and lower 0.8µA IQ. | Enables tighter input margins (e.g., 1.85V min input) and longer battery life in new designs. | Select AP7375-15W5-7 for new designs requiring extended input range or lowest possible standby current. |
| MCP1703T-1502E/MB | Microchip 1.5V/250mA LDO with 600mV dropout, 2.5µA IQ, and no reverse current protection. | Lacks reverse current blocking; requires external diode if backfeed risk exists in system architecture. | Choose only if reverse current protection is unnecessary and thermal performance allows higher dropout margin. |
Compared with AP7370-15WW-7, AP7375-15W5-7 offers superior efficiency and headroom for next-gen portable instruments, while MCP1703T-1502E/MB provides legacy compatibility at the cost of missing critical protection features.
Availability
AP7370-15WW-7 is available at Aetrix Electronics and suitable for metering systems, portable weighing scales, and USB-powered sensor nodes requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for AP7370-15WW-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 manufacturer specializing in discrete, analog, and mixed-signal solutions for power management, signal integrity, and connectivity applications.
The AP7370 series belongs to Diodes' high-reliability ULDO regulator product line, engineered specifically for battery-powered instrumentation and portable equipment demanding wide input range, ultra-low IQ, and robust protection features.
FAQ
Is AP7370-15WW-7 recommended for new designs?
No-Diodes explicitly marks AP7370 as "NOT RECOMMENDED FOR NEW DESIGN" and recommends AP7375 as its successor. AP7370-15WW-7 remains available for existing production and legacy design support, with full datasheet compliance and guaranteed supply through Aetrix Electronics' continuity program.
What is the thermal performance of AP7370-15WW-7 in SOT25 package?
In SOT25 (WW), AP7370-15WW-7 has θJA = 155°C/W and θJC = 23°C/W. At 300mA load with 18V input, junction temperature rise is ~46°C above ambient-well within the +125°C max operating limit, provided ≥1 cm² copper pour is used under the exposed pad region.
Can AP7370-15WW-7 operate with 1.0µF ceramic output capacitors?
Yes-the datasheet specifies stability with 1.0µF X5R/X7R ceramic capacitors on both input and output. No ESR requirements or damping resistors are needed, simplifying layout and eliminating electrolytic/tantalum components.
Does AP7370-15WW-7 require an enable pin for operation?
No-AP7370-15WW-7 has no enable (EN) pin. It operates continuously when VIN is within 3.2–18V. The SOT25 (WW) variant uses pins 1 (VIN), 2 (GND), 4 (VOUT), and two NC pins (3 & 5); no external control signals are supported.
AP7370-15WW-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):
- 1.5V
- 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
AP7370-15WW-7 FAQ
1.How can I place an order for AP7370-15WW-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7370-15WW-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 AP7370-15WW-7 reliable?
The price and inventory of AP7370-15WW-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7370-15WW-7 is usually 5 days.
3.What payment methods are accepted for AP7370-15WW-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7370-15WW-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7370-15WW-7?
AP7370-15WW-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7370-15WW-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 AP7370-15WW-7?
For technical support, including AP7370-15WW-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7370-15WW-7 requirements.
6.How does Aetrix verify that AP7370-15WW-7 is sourced from the original manufacturer or authorized distributors?
All AP7370-15WW-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 AP7370-15WW-7 meets industry standards.
7.What is the process for return or replacement of AP7370-15WW-7?
All AP7370-15WW-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7370-15WW-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 AP7370-15WW-7 part is unused and in its original packaging.
Return procedure for AP7370-15WW-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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