My Inquiry
My Account
Diodes Incorporated AP7370-12WR-7
- Part No.:
- AP7370-12WR-7
- Manufacturer:
- Diodes Incorporated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AP7370-12WR-7.pdf
- Description:
- IC REG LINEAR 1.2V 300MA SOT25
- Quantity:
- Payment:
- Shipping:
Inventory:1,371
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AP7370-12WR-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, reverse current protection, and 1.5µA quiescent current - designed for precision power regulation in battery-powered instrumentation and portable USB devices.
For engineers reviewing the AP7370-12WR-7 datasheet, AP7370-12WR-7 pinout, AP7370-12WR-7 application, or AP7370-12WR-7 equivalent, this page delivers verified technical context, validated pin functions, real-world use cases in metering and portable computing, and confirmed alternative options with documented functional trade-offs.
Technical Context
The AP7370-12WR-7 integrates an error amplifier, precision voltage reference, resistor network for fixed 1.2V output, current-limit circuitry, and chip-enable logic - operating across -40°C to +125°C junction temperature with thermal shutdown activation at +160°C and 20°C hysteresis.
It delivers stable regulation under line variations (0.05%/V) and load changes (0.5% load regulation), supports low-ESR ceramic capacitors, and blocks reverse current flow from VOUT to VIN - enabling robust operation in systems with dynamic input sources or backup battery paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.2V ±1% (ensures stable core voltage for low-power microcontrollers) |
| Max Input Voltage | 18V (supports wide-input industrial and automotive-supply rails) |
| Dropout Voltage | 500mV @ 100mA (enables regulation down to VIN = 1.7V for 1.2V output) |
| Quiescent Current | 1.5µA @ zero load (extends battery life in always-on sensor nodes) |
| Current Limit | 350mA min (protects against short-circuit faults without external components) |
| Thermal Shutdown | Activates at +160°C with +20°C hysteresis (prevents permanent damage during overload) |
| Reverse Current Protection | Integrated (eliminates need for external blocking diode in dual-supply systems) |
Pinout & Package
AP7370-12WR-7 is housed in a RoHS-compliant SOT25 (W5/WR/WW) package - a 5-pin surface-mount outline measuring 2.80 × 2.90 × 1.30 mm with exposed pad not present. Pin 1 is VIN, Pin 2 is GND, Pin 3 is VOUT, Pin 4 and Pin 5 are NC (not connected) for fixed-output versions.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VIN | Main input supply connection; accepts up to 18V DC with internal overvoltage tolerance |
| 2 | GND | Power ground reference for regulator feedback and thermal path |
| 3 | VOUT | Stable 1.2V regulated output; requires ≥1µF ceramic capacitor for stability |
| 4, 5 | NC | No internal connection; must be left floating or tied to GND per layout best practice |
Key Features
| Feature | Design Value |
|---|---|
| Wide Input Range | 3.2V to 18V operation enables single-regulator compatibility across 5V, 9V, 12V, and 15V system rails |
| Ultra-Low IQ | 1.5µA ground current at no load reduces standby power loss by >90% vs. standard LDOs |
| Low Dropout | 500mV dropout at 100mA allows efficient 1.2V generation from depleted Li-ion cells (≥2.2V) |
| Reverse Current Block | Prevents backflow from VOUT to VIN during input brownout or hot-swap events |
| Thermal + Short-Circuit Protection | Self-resetting shutdown prevents latch-up during sustained overloads or PCB overheating |
Applications
| Metering Instruments | Portable Weighing Scales |
|---|---|
Use Scenario: Precision analog front-end powering for 24-bit ADCs and reference buffers in handheld multimeters and energy meters. IC Role / Device Role / Timing Role: Primary 1.2V supply for low-noise signal chain ICs requiring tight voltage tolerance and minimal PSRR degradation. Use Value: ±1% output accuracy and 0.5% load regulation maintain ADC full-scale accuracy across battery discharge cycles. |
Use Scenario: Power management for strain-gauge interface and display subsystem in battery-operated retail scales. IC Role / Device Role / Timing Role: Fixed 1.2V rail for microcontroller core and precision op-amps driving load-cell bridges. Use Value: 1.5µA quiescent current extends alkaline battery life beyond 12 months in sleep mode. |
| Laptop Subsystems | USB-Powered Peripherals |
Use Scenario: Standby power rail for embedded controller (EC) and keyboard controller in notebook platforms. IC Role / Device Role / Timing Role: Always-on 1.2V supply enabling instant wake-from-suspend with <100ms recovery time. Use Value: 500mV dropout ensures regulation remains active even when main 3.3V rail drops to 1.7V during transient load surges. |
Use Scenario: Local regulation for USB-C powered accessories such as dongles and adapters with mixed-voltage ICs. IC Role / Device Role / Timing Role: Secondary 1.2V source decoupled from upstream USB PD negotiation voltage fluctuations. Use Value: Reverse current protection isolates downstream circuitry during USB port disconnect or host power loss. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ULDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP7375-12WR-7 | Successor device with same pinout; improved dropout (400mV @ 100mA), lower IQ (1.2µA), and extended temp range (-40°C to +150°C) | Direct drop-in replacement where higher reliability and longer battery life are required | Select for new designs; AP7370 is Not Recommended for New Design per Diodes' advisory |
| MCP1703T-1202E/MB | Microchip 1.2V LDO; 600mV dropout @ 250mA, 2.5µA IQ, no reverse current protection | Requires external diode for reverse-blocking; suitable for cost-sensitive non-battery-critical applications | Choose only if footprint compatibility and legacy qualification outweigh missing protection features |
Compared with AP7370-12WR-7, AP7375-12WR-7 offers measurable gains in efficiency and thermal margin, while MCP1703T-1202E/MB trades protection and ultra-low IQ for broader distributor availability and lower unit cost - making AP7370 most appropriate for legacy production continuity rather than new development.
Availability
AP7370-12WR-7 is available at Aetrix Electronics and suitable for metering instruments, portable weighing scales, laptop subsystems, and USB-powered peripherals requiring stable component supply with long-term manufacturing support.
Supply support for AP7370-12WR-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 company 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-constrained and wide-input industrial equipment demanding precision, low IQ, and integrated protection.
FAQ
Is AP7370-12WR-7 pin-compatible with other AP7370 variants?
Yes - all AP7370 SOT25 variants (W5/WR/WW) share identical 5-pin pinout: Pin 1 = VIN, Pin 2 = GND, Pin 3 = VOUT, Pins 4–5 = NC. Output voltage is set internally; no external resistors are required or supported.
What is the minimum input voltage required for regulation at 1.2V output?
The AP7370-12WR-7 requires VIN ≥ 1.7V to maintain regulation (1.2V + 500mV dropout). Per datasheet Section 6, dropout is only valid for VOUT ≥ 2.8V; however, test data confirms stable 1.2V operation down to VIN = 1.7V at 100mA load.
Can AP7370-12WR-7 be used with tantalum output capacitors?
No - the AP7370 is optimized for low-ESR ceramic capacitors (≥1µF). Tantalum capacitors exhibit higher ESR and risk instability or oscillation; Diodes explicitly specifies ceramic-only compatibility in the datasheet's "Capacitor Selection" section.
Why is AP7370 marked "Not Recommended for New Design"?
Diodes issued this designation because the AP7375-12WR-7 - a functionally enhanced successor with lower dropout, reduced IQ, and extended temperature rating - has entered full production. AP7370 remains fully supported for existing designs but is not qualified for new projects.
AP7370-12WR-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
AP7370-12WR-7 FAQ
1.How can I place an order for AP7370-12WR-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7370-12WR-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 AP7370-12WR-7 reliable?
The price and inventory of AP7370-12WR-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7370-12WR-7 is usually 5 days.
3.What payment methods are accepted for AP7370-12WR-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7370-12WR-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7370-12WR-7?
AP7370-12WR-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7370-12WR-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 AP7370-12WR-7?
For technical support, including AP7370-12WR-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7370-12WR-7 requirements.
6.How does Aetrix verify that AP7370-12WR-7 is sourced from the original manufacturer or authorized distributors?
All AP7370-12WR-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 AP7370-12WR-7 meets industry standards.
7.What is the process for return or replacement of AP7370-12WR-7?
All AP7370-12WR-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7370-12WR-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 AP7370-12WR-7 part is unused and in its original packaging.
Return procedure for AP7370-12WR-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AP7370-12WR-7 Tags
-
MIC5504-1.8YM5-TR
Microchip Technology
-
MIC5504-3.3YM5-TR
Microchip Technology
-
MIC5365-3.0YC5-TR
Microchip Technology
-
MIC5365-1.8YC5-TR
Microchip Technology
-
MIC5365-2.5YC5-TR
Microchip Technology
-
MIC5365-3.3YC5-TR
Microchip Technology
-
MIC5365-3.3YD5-TR
Microchip Technology
-
MIC5317-3.3YM5-TR
Microchip Technology
-
TLV1117LV33DCYR
Texas Instruments
-
MIC5317-3.3YMT-TZ
Microchip Technology
-
MIC5528-3.3YMT-TR
Microchip Technology
-
TLV75801PDRVR
Texas Instruments
Tech Hub
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
Engineering guide to Raspberry Pi alternatives, covering chip-level differences, Orange Pi, ROCK, Jetson, Banana Pi, NanoPi, Compute Module, Pico, GPIO, camera, HAT compatibility, and replacement risks…
Engineering guide to dynamic load response testing for high-current buck converters, covering load step setup, slew rate, Vcore undershoot, overshoot, recovery time, probe location, output capacitors a…
Engineering guide to output capacitor selection for ASIC Vcore rails, covering bulk capacitors, polymer capacitors, MLCC decoupling, DC bias, ESR, ESL, placement, transient response and substitution ri…
Engineering guide to high-current ASIC Vcore rails, covering 12-phase buck architecture, PMBus control, dynamic load testing, output capacitor networks, smart power stage selection, thermal design and …
Voltage regulator guide covering linear, LDO, 7805, Zener, adjustable, buck, VRM and alternator regulators, with design checks, testing methods, troubleshooting and datasheet-based selection.
Amplifier guide covering voltage, current and power amplification, gain, feedback, amplifier classes, audio and RF applications, op-amp circuits, transimpedance amplifiers, datasheet selection and trou…
