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Diodes Incorporated AP7370-36W5-7
- Part No.:
- AP7370-36W5-7
- Manufacturer:
- Diodes Incorporated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AP7370-36W5-7.pdf
- Description:
- IC REG LINEAR 3.6V 300MA SOT25
- Quantity:
- Payment:
- Shipping:
Inventory:3,634
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Product details
Overview
AP7370-36W5-7 from Diodes Incorporated is a 3.6V 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-designed for stable power delivery in portable instrumentation and battery-powered USB devices.
For engineers reviewing the AP7370-36W5-7 datasheet, AP7370-36W5-7 pinout, AP7370-36W5-7 application, or AP7370-36W5-7 equivalent, key selection criteria include wide VIN range (3.2–18V), ultra-low quiescent current (1.5–2.5µA), thermal shutdown, short-circuit protection, and compatibility with low-ESR ceramic capacitors without external compensation.
Technical Context
The AP7370-36W5-7 integrates a precision voltage reference, error amplifier, resistor network for fixed 3.6V output, current-limit circuitry, and chip-enable logic-all optimized for low-noise, high-PSRR regulation in space-constrained systems. Its architecture supports operation down to 3.2V input while maintaining regulation up to 18V.
It delivers load regulation of ≤0.5% across 1–300mA (for VOUT > 2.5V), line regulation of ≤0.05%/V, and features built-in reverse current blocking, thermal shutdown at +160°C with +20°C hysteresis, and ESD robustness (6kV HBM).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.6V ±1% (ensures stable MCU core or sensor rail without external feedback) |
| Input Voltage Range | 3.2V to 18V (supports wide-input battery stacks, automotive transients, and industrial supplies) |
| Max Output Current | 300mA continuous (sufficient for microcontrollers, RF modules, and analog front-ends) |
| Dropout Voltage | 500mV @ 100mA (enables regulation from 4.1V input-critical for single-cell Li-ion systems) |
| Quiescent Current | 1.5–2.5µA (minimizes standby power loss in always-on metering and IoT edge nodes) |
| Thermal Shutdown | +160°C with +20°C hysteresis (prevents latch-up during sustained overload or poor PCB heatsinking) |
| Reverse Current Protection | Integrated blocking (eliminates need for external series diode in backup-supply or OR-ing configurations) |
Pinout & Package
SOT25 (W5) package: 5-pin surface-mount, thermally enhanced plastic case with exposed pad not electrically connected (GND only via Pin 2). Compatible with standard reflow profiles per JEDEC J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VIN | Main input supply connection; accepts up to 18V with internal overvoltage clamp |
| 2 | GND | Power ground reference and primary thermal path; must be solidly connected to PCB copper pour |
| 3 & 4 | NC | No-connect pins-left floating per fixed-output version; no internal circuitry attached |
| 5 | VOUT | Regulated 3.6V output; requires ≥1µF ceramic capacitor (X5R/X7R) placed within 3mm for stability |
Key Features
| Feature | Design Value |
|---|---|
| Wide input range (3.2–18V) | Enables direct use with 12V industrial rails, multi-cell batteries, or unregulated wall adapters without pre-regulation |
| Ultra-low IQ (1.5–2.5µA) | Extends battery life in portable weighing scales and handheld meters operating in deep-sleep modes |
| Low dropout (500mV @ 100mA) | Maintains regulation through full discharge of single Li-ion (3.0–4.2V) or two Alkaline cells (2.4–3.2V) |
| Reverse current blocking | Prevents backfeed from VOUT to VIN when input is removed-critical in redundant supply or hot-swap designs |
| Ceramic-capacitor compatible | Stable with ≥1µF X5R/X7R MLCCs; eliminates cost and footprint of tantalum or electrolytic bulk capacitors |
Applications
| Battery-Powered Weighing Scales | Portable Medical Instrumentation |
|---|---|
|
Use Scenario: Precision load-cell signal conditioning in handheld digital scales powered by two AA alkaline cells (2.4–3.2V). IC Role / Device Role / Timing Role: Primary 3.6V LDO supplying ADC reference, op-amp bias, and microcontroller I/O rail. Use Value: Maintains regulation down to 3.2V input while delivering <0.5% load regulation-ensuring consistent ADC LSB resolution across battery life. |
Use Scenario: Powering low-noise analog front-end and BLE SoC in portable blood glucose meters. IC Role / Device Role / Timing Role: Clean 3.6V supply for sensor excitation, signal chain, and wireless transceiver. Use Value: Ultra-low IQ extends single-CR2032 battery life beyond 12 months in standby; reverse blocking prevents leakage into depleted coin cell. |
| Industrial Portable Meters | USB-Powered Test Equipment |
|
Use Scenario: Multifunction handheld multimeter using Li-ion battery and isolated RS-485 interface. IC Role / Device Role / Timing Role: Main 3.6V rail for MCU, display driver, and precision reference IC. Use Value: 18V input tolerance accommodates transient surges on field-deployed equipment; thermal shutdown prevents damage during probe short-circuits. |
Use Scenario: USB-powered oscilloscope probe interface requiring clean 3.6V from 5V USB bus. IC Role / Device Role / Timing Role: Post-regulator converting noisy 5V USB to low-noise 3.6V for analog acquisition path. Use Value: 500mV dropout allows >90% efficiency at 100mA; excellent line regulation suppresses USB ripple-induced measurement offset. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP7375-36W5-7 | Successor part with same pinout; improved PSRR (>60dB @ 1kHz), lower dropout (400mV @ 100mA), and extended temp range (−40°C to +125°C vs. +125°C max) | Recommended for new designs requiring higher noise immunity or wider ambient operation | Select AP7375-36W5-7 if designing for production after Q3 2024; AP7370-36W5-7 remains viable for legacy BOM continuity |
| MCP1703T-3602E/MB | Microchip 3.6V LDO; 6V max VIN, 250mA output, 1.8µA IQ, but lacks reverse current protection and thermal hysteresis | Suitable for low-voltage, low-power applications where input never exceeds 6V and reverse feed is not a concern | Choose only if VIN stays ≤6V and board-level reverse-blocking diode is already present |
Compared with AP7375-36W5-7, the AP7370-36W5-7 offers proven reliability in existing designs but trades off PSRR and thermal margin; versus MCP1703T-3602E/MB, it provides superior input voltage flexibility and integrated protection-reducing bill-of-materials count in battery- and USB-fed instruments.
Availability
AP7370-36W5-7 is available at Aetrix Electronics and suitable for battery-powered instrumentation, portable medical devices, and industrial handheld meters requiring stable component supply with long-term lifecycle visibility.
Supply support for AP7370-36W5-7 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 power management, signal integrity, and protection solutions for industrial, computing, and consumer markets.
The AP7370 series belongs to Diodes' high-reliability ULDO regulator product line, engineered specifically for portable and battery-sensitive applications demanding wide input range, ultra-low quiescent current, and robust fault protection.
FAQ
What is the recommended input capacitor for AP7370-36W5-7?
A minimum 1.0µF X5R or X7R ceramic capacitor placed within 3mm of the VIN pin is required for stability and transient response. Larger values (e.g., 4.7µF) improve ripple rejection but are not mandatory. Avoid tantalum or aluminum electrolytics due to ESR sensitivity.
Does AP7370-36W5-7 require an output capacitor, and what type is specified?
Yes-a minimum 1.0µF ceramic capacitor (X5R/X7R) is required on VOUT for loop stability and load transient performance. The device is optimized for low-ESR ceramics; using higher-ESR types may cause oscillation or degraded regulation.
Is AP7370-36W5-7 pin-compatible with other regulators in the AP737x family?
Yes-AP7370-36W5-7 shares identical SOT25 pinout and footprint with all AP7370 variants (e.g., -33W5-7, -50W5-7) and the newer AP7375 series. No PCB redesign is needed when upgrading to AP7375-36W5-7 for enhanced performance.
Why is AP7370 marked "Not Recommended for New Design"?
Diodes has designated AP7370 as NRND because the AP7375 offers improved specifications-including lower dropout, higher PSRR, and extended temperature range-while maintaining full pin and functional compatibility. AP7370 remains fully supported for existing designs and legacy production.
AP7370-36W5-7 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):
- 3.6V
- 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
AP7370-36W5-7 FAQ
1.How can I place an order for AP7370-36W5-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7370-36W5-7 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 AP7370-36W5-7 reliable?
The price and inventory of AP7370-36W5-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7370-36W5-7 is usually 5 days.
3.What payment methods are accepted for AP7370-36W5-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7370-36W5-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7370-36W5-7?
AP7370-36W5-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7370-36W5-7 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 AP7370-36W5-7?
For technical support, including AP7370-36W5-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7370-36W5-7 requirements.
6.How does Aetrix verify that AP7370-36W5-7 is sourced from the original manufacturer or authorized distributors?
All AP7370-36W5-7 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 AP7370-36W5-7 meets industry standards.
7.What is the process for return or replacement of AP7370-36W5-7?
All AP7370-36W5-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7370-36W5-7, 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 AP7370-36W5-7 part is unused and in its original packaging.
Return procedure for AP7370-36W5-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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