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Diodes Incorporated AP7370-12WW-7
- Part No.:
- AP7370-12WW-7
- Manufacturer:
- Diodes Incorporated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AP7370-12WW-7.pdf
- Description:
- IC REG LINEAR 1.2V 300MA SOT25
- Quantity:
- Payment:
- Shipping:
Inventory:2,884
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Product details
Overview
AP7370-12WW-7 from Diodes Incorporated is a fixed-output 1.2V, 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 precision power regulation in portable instrumentation and battery-powered metering systems.
For engineers reviewing the AP7370-12WW-7 datasheet, AP7370-12WW-7 pinout, AP7370-12WW-7 application, or AP7370-12WW-7 equivalent, this part supports stable low-voltage biasing in space-constrained USB-peripheral designs where input voltage varies widely (3.2–18V) and quiescent current must remain below 2.5µA at zero load.
Technical Context
The AP7370-12WW-7 integrates a precision voltage reference, error amplifier, and resistor network to maintain 1.2V output with ±1% tolerance across –40°C to +125°C junction temperature. Its internal current-limit circuit triggers at 350mA for VOUT > 2.5V (adjusted to 200mA for ≤2.5V outputs), and thermal shutdown activates at +160°C with +20°C hysteresis.
It operates with ceramic capacitors as low as 1.0µF on input and output, delivers <0.5% load regulation up to 300mA, and achieves 0.05%/V line regulation-enabling reliable operation in variable-input industrial sensor nodes and handheld test equipment without external compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.2V ±1% - ensures stable core/bias rail for low-voltage microcontrollers and ADC references |
| Max Input Voltage | 18V - supports direct connection to unregulated 12V/15V supply rails or multi-cell battery stacks |
| Dropout Voltage | 500mV @ 100mA - enables regulation down to VIN = 1.7V, critical for single-cell Li-ion or 2xAA operation |
| Quiescent Current | 1.5–2.5µA @ IOUT = 0 - extends battery life in always-on metering and weighing scale standby modes |
| Current Limit | 350mA - provides robust short-circuit protection while sustaining full 300mA rated output |
| Thermal Shutdown | +160°C activation with +20°C hysteresis - prevents latch-up during sustained overload or high-ambient PCB conditions |
| Reverse Current Protection | Integrated - blocks backfeed from VOUT to VIN when input is removed, protecting upstream sources |
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-compliant, halogen-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VIN | Main input supply connection; accepts 3.2–18V DC with transient tolerance up to 20V absolute max |
| 2 | GND | Analog ground reference; must be low-impedance connection to minimize noise coupling into error amplifier |
| 3 | NC | No-connect terminal; left floating per fixed-output configuration-no external circuitry required |
| 4 | VOUT | Regulated 1.2V output; requires ≥1.0µF ceramic capacitor placed within 3mm of pin for stability |
| 5 | NC | No-connect terminal; electrically isolated-no routing or soldering needed |
Key Features
| Feature | Design Value |
|---|---|
| Wide input range (3.2–18V) | Eliminates need for pre-regulation stages in mixed-rail systems-directly powers 1.2V logic from 9V or 12V wall adapters |
| Ultra-low IQ (1.5–2.5µA) | Reduces standby power loss to <3nW per µA-critical for battery-operated devices with multi-year shelf life |
| Low ESR capacitor compatibility | Stable with 1.0µF X5R/X7R ceramics-avoids costly tantalum or large aluminum electrolytics in compact layouts |
| Reverse current blocking | Prevents VOUT from sourcing current into VIN during hot-swap or input brownout-protects upstream DC-DC converters |
| Thermal shutdown with hysteresis | Auto-recovery after cooldown avoids system lockup during intermittent overloads-no external reset logic needed |
Applications
| Metering Systems | Weighing Scales |
|---|---|
Use Scenario: Portable digital multimeters and clamp meters powered by 2×AA or 9V batteries with wide input voltage swing during discharge. IC Role / Device Role / Timing Role: Primary 1.2V bias rail generator for 24-bit sigma-delta ADC and low-power MCU core. Use Value: Maintains ±1% output accuracy across battery voltage drop from 9V to 4.5V, enabling calibrated measurement without software correction. | Use Scenario: Battery-powered retail or industrial platform scales requiring long-term zero-stability and low-noise analog front-end. IC Role / Device Role / Timing Role: Low-noise 1.2V reference supply for load-cell instrumentation amplifier and ADC reference buffer. Use Value: Ultra-low 2.5µA quiescent current extends 2×AA battery life beyond 2 years in sleep mode, while reverse-current protection prevents sensor offset drift during battery replacement. |
| Laptop Peripheral Devices | Portable Information Appliances |
Use Scenario: USB-powered docking accessories (e.g., HDMI adapters, card readers) drawing burst current while maintaining USB voltage compliance. IC Role / Device Role / Timing Role: Local 1.2V LDO for FPGA configuration memory and interface PHY logic. Use Value: 500mV dropout allows operation down to VIN = 1.7V-supporting USB-C PD negotiation fallback to 3.3V or 5V legacy modes without rail collapse. | Use Scenario: Handheld barcode scanners and RFID readers using single-cell Li-ion (2.8–4.2V) with embedded BLE SoC requiring precise 1.2V supply. IC Role / Device Role / Timing Role: Core voltage regulator for ARM Cortex-M0+ MCU and RF transceiver baseband section. Use Value: 0.05%/V line regulation minimizes supply-induced clock jitter in BLE radio timing circuits, preserving packet error rate under dynamic load. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ULDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP7375-12W5-7 | Successor device with same 1.2V output but improved 300mV dropout at 100mA and lower 0.8µA IQ | Pin-compatible SOT25 drop-in replacement; supports tighter input headroom and longer battery runtime | Select for new designs requiring extended low-VIN operation or reduced standby power |
| MCP1700T-1202E/TT | 1.2V fixed LDO with 6V max input, 175mV dropout @ 250mA, 1.6µA IQ, SOT23-3 package | Limited to ≤6V input-unsuitable for 9V/12V battery or adapter inputs; smaller footprint but lower thermal margin | Choose only when input voltage is strictly ≤6V and board area is constrained more than thermal performance |
Compared with AP7370-12WW-7, AP7375-12W5-7 offers superior dropout and quiescent current for next-gen portable designs, while MCP1700T-1202E/TT trades input voltage range for minimal footprint-making the AP7370 optimal for 3.2–18V applications needing proven reliability and thermal robustness in SOT25.
Availability
AP7370-12WW-7 is available at Aetrix Electronics and suitable for metering systems, weighing scales, laptop peripheral devices, and portable information appliances requiring stable component supply with full traceability and lifecycle continuity.
Supply support for AP7370-12WW-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 industrial, computing, consumer, and communications markets.
The AP7370 series belongs to Diodes' high-reliability ULDO regulator product line, engineered specifically for battery-powered and wide-input industrial instrumentation where precision, low IQ, and robust protection features are mandatory.
FAQ
What is the maximum allowable input voltage for AP7370-12WW-7?
The absolute maximum input voltage is 20V, but the recommended operating range is 3.2V to 18V. Exceeding 18V risks permanent damage even for brief transients. The device includes internal protection against short-term overvoltage, but sustained operation above 18V violates specification limits and may degrade long-term reliability.
Does AP7370-12WW-7 require an external bypass capacitor on the output?
Yes-a minimum 1.0µF ceramic capacitor (X5R or X7R dielectric) must be placed within 3mm of the VOUT pin. This capacitor ensures loop stability, reduces output ripple under dynamic load, and maintains specified load regulation. Larger values (e.g., 2.2µF) improve transient response but are not required for basic functionality.
Is AP7370-12WW-7 pin-compatible with other AP7370 variants?
Yes-all AP7370 SOT25 variants (W5, WR, WW) share identical pinout: Pin 1 = VIN, Pin 2 = GND, Pins 3 & 5 = NC, Pin 4 = VOUT. Output voltage is set internally; no external resistors are used. This allows direct substitution between 1.2V, 1.5V, 1.8V, etc., versions without layout changes.
Why is AP7370 marked "Not Recommended for New Design"?
Diodes has designated AP7370 as NRND because the enhanced AP7375 series offers improved specifications (lower dropout, lower IQ, same pinout) and full long-term supply commitment. AP7370 remains fully supported for existing production and legacy design refreshes, but new projects should evaluate AP7375-12W5-7 for better performance and roadmap assurance.
AP7370-12WW-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):
- 1.2V
- 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
AP7370-12WW-7 FAQ
1.How can I place an order for AP7370-12WW-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7370-12WW-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 AP7370-12WW-7 reliable?
The price and inventory of AP7370-12WW-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7370-12WW-7 is usually 5 days.
3.What payment methods are accepted for AP7370-12WW-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7370-12WW-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7370-12WW-7?
AP7370-12WW-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7370-12WW-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 AP7370-12WW-7?
For technical support, including AP7370-12WW-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7370-12WW-7 requirements.
6.How does Aetrix verify that AP7370-12WW-7 is sourced from the original manufacturer or authorized distributors?
All AP7370-12WW-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 AP7370-12WW-7 meets industry standards.
7.What is the process for return or replacement of AP7370-12WW-7?
All AP7370-12WW-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7370-12WW-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 AP7370-12WW-7 part is unused and in its original packaging.
Return procedure for AP7370-12WW-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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