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Diodes Incorporated AP7370-15WR-7
- Part No.:
- AP7370-15WR-7
- Manufacturer:
- Diodes Incorporated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AP7370-15WR-7.pdf
- Description:
- IC REG LINEAR 1.5V 300MA SOT25
- Quantity:
- Payment:
- Shipping:
Inventory:4,871
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Product details
Overview
AP7370-15WR-7 from Diodes Incorporated is a 1.5V fixed-output, 300mA ultra-low dropout (ULDO) linear regulator in SOT25 package, featuring 500mV dropout at 100mA, ±1% output voltage accuracy over load/temperature, and reverse current protection - deployed in portable instrumentation and battery-powered metering systems where input supply varies from 3.2V to 18V.
For engineers reviewing the AP7370-15WR-7 datasheet, AP7370-15WR-7 pinout, AP7370-15WR-7 application, or AP7370-15WR-7 equivalent, this page delivers verified technical context, validated pin functions for SOT25, real-world load regulation performance (±0.5%), thermal shutdown behavior (+160°C), and direct alternatives with documented voltage/current/thermal differences.
Technical Context
The AP7370-15WR-7 integrates a precision voltage reference, error amplifier, and resistor network to maintain 1.5V output with ±1% tolerance across -40°C to +125°C junction temperature. Its low-quiescent-current design draws only 1.5–2.5µA at zero load and remains stable with 1.0µF ceramic capacitors on input and output.
Internal current limiting activates at 200mA for 1.5V output (per Note 4), and thermal shutdown engages at +160°C with +20°C hysteresis. Dropout voltage is specified only for VOUT ≥ 2.8V per datasheet Note 6 - thus not rated for dropout at 1.5V, though functional down to VIN = 3.2V minimum.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.5V ±1% (98–102% tolerance for VOUT ≤ 2.5V), enabling precise biasing of low-voltage logic and analog sensors. |
| Input Voltage Range | 3.2V to 18V - supports wide-input industrial and automotive auxiliary rails without external pre-regulation. |
| Max Output Current | 300mA continuous (150mA max for 1.5V version per current limit spec), sufficient for microcontroller cores and small peripherals. |
| Quiescent Current | 1.5–2.5µA at IOUT = 0A - extends battery life in always-on metering and weighing scale standby modes. |
| Line Regulation | 0.05%/V (3.2V–18V input range) - ensures <±0.9mV output shift per volt input change, critical for high-resolution ADC references. |
| Load Regulation | ±0.5% (1mA–150mA load range) - maintains stable 1.5V supply under dynamic sensor or display driver loads. |
| Thermal Shutdown | +160°C activation with +20°C hysteresis - prevents permanent damage during sustained overload or poor PCB heatsinking. |
Pinout & Package
SOT25 (WR) package: 5-pin surface-mount, RoHS-compliant, 2.8mm × 2.9mm footprint with exposed pad not electrically connected (no thermal pad).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VIN | Main input supply connection; accepts up to 18V DC with internal ESD protection (1500V CDM, 6000V HBM). |
| 2 | GND | Power ground reference for regulator feedback and internal circuitry; must be low-impedance for stability. |
| 3 | NC | No-connect terminal - left floating; no internal connection in fixed-output configuration. |
| 4 | VOUT | Regulated 1.5V output; requires 1.0µF ceramic capacitor (X5R/X7R) within 5mm for transient response. |
| 5 | NC | No-connect terminal - left floating; no internal connection in fixed-output configuration. |
Key Features
| Feature | Design Value |
|---|---|
| Reverse Current Protection | Blocks >1µA reverse current when VOUT > VIN, preventing battery drain in backup power path configurations. |
| Low ESR Capacitor Compatibility | Stable with 1.0µF ceramic (X5R/X7R); eliminates need for larger, costlier tantalum or aluminum electrolytics. |
| Ultra-Low Ground Current | 2.5µA max at full 150mA load - reduces total system power by >90% vs. legacy LDOs in always-on applications. |
| High Accuracy Over Temperature | ±100ppm/°C output drift - ensures <±15mV deviation across -40°C to +125°C, critical for precision analog front-ends. |
| Short-Circuit Protection | Current-limited to ~200mA at 1.5V output; self-recovering after fault removal without latch-up. |
Applications
| Metering Systems | Weighing Scales |
|---|---|
|
Use Scenario: Digital multimeters and energy meters requiring stable 1.5V reference for 24-bit sigma-delta ADCs and LCD bias. IC Role / Device Role / Timing Role: Primary low-noise analog supply rail regulator, decoupling noise from switching power stages. Use Value: ±0.5% load regulation and ±100ppm/°C drift ensure <0.01% measurement error across operating temperature range. |
Use Scenario: Portable benchtop and platform scales using strain-gauge bridges and low-power microcontrollers. IC Role / Device Role / Timing Role: Power source for op-amp signal conditioning and MCU core voltage domain. Use Value: 1.5µA quiescent current enables >1-year battery life in sleep mode; reverse current protection prevents cell leakage. |
| Laptop Subsystems | Portable Instrumentation |
|
Use Scenario: USB-C powered accessories (e.g., dongles, adapters) needing regulated 1.5V from variable bus voltage (5–20V). IC Role / Device Role / Timing Role: Secondary LDO for low-voltage I/O buffers and level-shifting interfaces. Use Value: Wide 3.2–18V input range eliminates need for buck pre-regulator; SOT25 footprint saves board space. |
Use Scenario: Handheld gas detectors and environmental sensors with mixed-signal SoCs and electrochemical cells. IC Role / Device Role / Timing Role: Clean power delivery to analog sensor front-end and RF transceiver bias rails. Use Value: 500mV dropout margin allows operation down to 2.0V input - critical during battery discharge below 3.0V. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed-output LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP7375-15W5-7 | Successor device; same 1.5V output but rated for 500mA, lower 300mV dropout at 100mA, and improved PSRR (65dB @ 1kHz). | Supports higher-current loads (e.g., multi-rail PMIC subsystems); requires updated layout for U-DFN2020-6 (Type C) package. | Select when upgrading new designs for higher current headroom or tighter dropout - AP7370-15WR-7 is NOT recommended for new design per Diodes notice. |
| MCP1700T-1502E/TT | Microchip 1.5V LDO; 250mA rating, 600mV dropout at 250mA, 1.6µA IQ, but lacks reverse current protection and thermal hysteresis. | Suitable for cost-sensitive consumer devices where reverse leakage and thermal recovery are non-critical. | Choose only if footprint compatibility (SOT23) and lowest BOM cost outweigh missing protections and tighter accuracy specs. |
Compared with AP7370-15WR-7, AP7375-15W5-7 offers 66% higher current capacity and 40% lower dropout, while MCP1700T-1502E/TT trades protection features for SOT23 size and lower unit cost - making AP7370-15WR-7 optimal only for legacy replacements where its SOT25 pinout and proven field reliability are mandatory.
Availability
AP7370-15WR-7 is available at Aetrix Electronics and suitable for metering systems, portable instrumentation, weighing scales, and laptop subsystems requiring stable component supply with known thermal and electrical behavior across extended temperature ranges.
Supply support for AP7370-15WR-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' ULDO regulator product line, designed specifically for battery-powered and wide-input industrial applications demanding ultra-low IQ, high accuracy, and robust protection features in compact packages.
FAQ
Is AP7370-15WR-7 pin-compatible with other AP7370 variants in SOT25?
Yes - all AP7370 SOT25 variants (W5/WR/WW) share identical 5-pin pinout: Pin 1 = VIN, Pin 2 = GND, Pins 3 & 5 = NC, Pin 4 = VOUT. The WR suffix denotes tape-and-reel packaging (3000 pcs/reel) and does not affect electrical or mechanical compatibility.
What is the minimum input voltage required for AP7370-15WR-7 to regulate at 1.5V?
The datasheet specifies a minimum input voltage of 3.2V for all AP7370 versions, including the 1.5V variant. This ensures internal circuitry biasing and regulation stability; dropout voltage is not characterized below VOUT ≥ 2.8V per Note 6, but functional operation begins at VIN = 3.2V.
Does AP7370-15WR-7 require an external enable signal?
No - AP7370-15WR-7 has no enable (EN) pin and operates continuously when VIN is applied within specification. It lacks active shutdown control; power sequencing is managed solely via VIN rail control.
Can AP7370-15WR-7 be used with tantalum output capacitors?
While the datasheet specifies stability with 1.0µF ceramic capacitors (X5R/X7R), tantalum capacitors may cause instability due to higher ESR and capacitance drift. Ceramic is strongly recommended; if tantalum must be used, verify phase margin with bench testing and add a 10nF ceramic in parallel.
AP7370-15WR-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
AP7370-15WR-7 FAQ
1.How can I place an order for AP7370-15WR-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7370-15WR-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 AP7370-15WR-7 reliable?
The price and inventory of AP7370-15WR-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7370-15WR-7 is usually 5 days.
3.What payment methods are accepted for AP7370-15WR-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7370-15WR-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7370-15WR-7?
AP7370-15WR-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7370-15WR-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 AP7370-15WR-7?
For technical support, including AP7370-15WR-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7370-15WR-7 requirements.
6.How does Aetrix verify that AP7370-15WR-7 is sourced from the original manufacturer or authorized distributors?
All AP7370-15WR-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 AP7370-15WR-7 meets industry standards.
7.What is the process for return or replacement of AP7370-15WR-7?
All AP7370-15WR-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7370-15WR-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 AP7370-15WR-7 part is unused and in its original packaging.
Return procedure for AP7370-15WR-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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