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Diodes Incorporated AP7370-12W5-7
- Part No.:
- AP7370-12W5-7
- Manufacturer:
- Diodes Incorporated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AP7370-12W5-7.pdf
- Description:
- IC REG LINEAR 1.2V 300MA SOT25
- Quantity:
- Payment:
- Shipping:
Inventory:3,658
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Product details
Overview
AP7370-12W5-7 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 power management in battery-powered instrumentation and portable computing.
For engineers reviewing the AP7370-12W5-7 datasheet, AP7370-12W5-7 pinout, AP7370-12W5-7 application, or AP7370-12W5-7 equivalent, this page delivers verified technical context, validated pin functions, real-world use cases in metering and portable devices, and confirmed alternative options with documented functional trade-offs.
Technical Context
The AP7370-12W5-7 integrates an error amplifier, precision voltage reference, and current-limit circuit to regulate output at 1.2V with ±1% tolerance across –40°C to +125°C junction temperature. Its wide 3.2–18V input range supports direct connection to unregulated battery or adapter rails.
It employs internal thermal shutdown (trip at +160°C, 20°C hysteresis) and short-circuit protection, while its 1.5–2.5µA quiescent current enables multi-year operation in low-power metering systems. Reverse current protection prevents backfeed when VOUT > VIN.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.2V ±1% (ensures stable core voltage for low-voltage microcontrollers) |
| Max Input Voltage | 18V (supports 12V battery systems and industrial adapters without pre-regulation) |
| Dropout Voltage | 500mV @ 100mA (enables regulation down to 1.7V input for 1.2V output) |
| Quiescent Current | 1.5–2.5µA (minimizes standby power loss in always-on sensor nodes) |
| Current Limit | 350mA min (protects against sustained overloads without latch-up) |
| Thermal Shutdown | +160°C trip with +20°C hysteresis (prevents permanent damage during transient overload) |
| Reverse Current Protection | Enabled (blocks >1µA reverse current when VOUT > VIN, critical for multi-rail sequencing) |
Pinout & Package
SOT25 (W5) package: 5-pin surface-mount, thermally enhanced plastic case with exposed pad (EP = GND), footprint compatible with JEDEC MO-203AA.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VIN | Main input supply connection; accepts up to 18V DC with transient immunity |
| 2 | GND | Analog/digital ground reference; tied to EP for thermal conduction |
| 3 | NC | No-connect terminal; electrically isolated and must remain unconnected |
| 4 | VOUT | Regulated 1.2V output; requires ≥1µF ceramic capacitor for stability |
| 5 | NC | No-connect terminal; electrically isolated and must remain unconnected |
Key Features
| Feature | Design Value |
|---|---|
| Wide Input Range | 3.2V to 18V enables single-supply operation across 3.7V Li-ion to 12V lead-acid systems |
| Low Dropout | 500mV @ 100mA allows >90% efficiency at light loads in space-constrained designs |
| Ultra-Low IQ | 1.5µA typical ground current extends battery life in sleep-mode applications |
| Ceramic Cap Compatible | Stable with ≥1µF X5R/X7R MLCCs - eliminates need for costly tantalum or electrolytic capacitors |
| Reverse Current Block | Prevents backflow from VOUT to VIN during power-down or hot-swap events |
Applications
| Metering Systems | Portable Medical Devices |
|---|---|
Use Scenario: Precision energy meter with isolated MCU, ADC, and RF transceiver operating from 3.6V primary battery. IC Role / Device Role / Timing Role: Primary 1.2V LDO supplying MCU core voltage and ADC reference buffer. Use Value: ±1% output accuracy maintains ADC full-scale linearity; 1.5µA IQ extends 10-year battery life. |
Use Scenario: Handheld blood glucose monitor powered by two AAA alkaline cells (up to 3.2V). IC Role / Device Role / Timing Role: Secondary 1.2V regulator for low-power sensor interface ASIC after buck converter. Use Value: 500mV dropout ensures regulation until battery depletes to 1.7V; reverse current protection isolates analog front-end during battery swap. |
| Weighing Scales | Laptop Subsystems |
Use Scenario: Industrial bench scale with strain-gauge bridge, 24-bit sigma-delta ADC, and Bluetooth LE module. IC Role / Device Role / Timing Role: Dedicated 1.2V rail for ADC digital core and reference driver. Use Value: Excellent load regulation (<0.5%) prevents code shifts during display backlight pulses; thermal shutdown prevents drift during extended calibration. |
Use Scenario: Embedded controller subsystem in ultrabook requiring independent 1.2V rail for secure boot logic. IC Role / Device Role / Timing Role: Standalone LDO for tamper-resistant MCU core, decoupled from main PMIC. Use Value: Wide 3.2–18V input accommodates both battery and adapter inputs; NC pins simplify layout in dense BGA routing zones. |
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 with improved PSRR (>60dB @ 1kHz) and lower dropout (350mV @ 100mA); same pinout | Preferred for noise-sensitive analog circuits like precision ADC references | Select when upgrading legacy designs where PSRR and dropout margin are critical |
| MCP1703T-1202E/MB | Microchip 1.2V LDO; 6V max input, 1.8µA IQ, no reverse current protection | Suitable only for low-input-voltage systems (<6V) without backfeed risk | Choose only if input never exceeds 6V and reverse current blocking is unnecessary |
Compared with AP7375-12W5-7, the AP7370-12W5-7 offers broader input capability (18V vs 6V) but higher dropout and lower PSRR; versus MCP1703T-1202E/MB, it adds reverse current blocking and 3× wider input range at cost of slightly higher IQ.
Availability
AP7370-12W5-7 is available at Aetrix Electronics and suitable for battery-powered equipment, portable medical instruments, and industrial metering requiring stable component supply with long-term traceability and RoHS 3 compliance.
Supply support for AP7370-12W5-7 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 ICs, specializing in high-reliability power management, signal integrity, and protection solutions for industrial and consumer markets.
The AP7370 series belongs to Diodes' ULDO regulator product line, engineered specifically for portable and battery-operated instrumentation where wide input range, ultra-low IQ, and reverse current blocking are mandatory.
FAQ
What is the maximum allowable input voltage for AP7370-12W5-7?
The absolute maximum input voltage is 20V, but the recommended operating range is 3.2V to 18V per the datasheet. Exceeding 18V risks violating safe operating area limits even if below 20V absolute max, especially under thermal stress or high load conditions.
Does AP7370-12W5-7 require an external enable signal?
No - the AP7370-12W5-7 has no enable pin and operates continuously when VIN is within specification. It lacks active shutdown control; power gating must be implemented externally via VIN switching or series FET.
Can AP7370-12W5-7 be used with ceramic output capacitors smaller than 1µF?
No - the datasheet specifies ≥1.0µF ceramic (X5R/X7R) for stability. Using smaller values risks oscillation due to insufficient phase margin; 2.2µF is recommended for robustness across temperature and aging.
Is the exposed pad (EP) on the SOT25 package electrically connected?
Yes - the exposed pad is internally connected to GND and must be soldered to a PCB thermal pad tied to system ground. This connection is essential for achieving the specified θJA of 155°C/W and preventing thermal shutdown under 300mA load.
AP7370-12W5-7 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
AP7370-12W5-7 FAQ
1.How can I place an order for AP7370-12W5-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7370-12W5-7 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 AP7370-12W5-7 reliable?
The price and inventory of AP7370-12W5-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7370-12W5-7 is usually 5 days.
3.What payment methods are accepted for AP7370-12W5-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7370-12W5-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7370-12W5-7?
AP7370-12W5-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7370-12W5-7 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 AP7370-12W5-7?
For technical support, including AP7370-12W5-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7370-12W5-7 requirements.
6.How does Aetrix verify that AP7370-12W5-7 is sourced from the original manufacturer or authorized distributors?
All AP7370-12W5-7 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 AP7370-12W5-7 meets industry standards.
7.What is the process for return or replacement of AP7370-12W5-7?
All AP7370-12W5-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7370-12W5-7, 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 AP7370-12W5-7 part is unused and in its original packaging.
Return procedure for AP7370-12W5-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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