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Diodes Incorporated AP7351D-12W5-7
- Part No.:
- AP7351D-12W5-7
- Manufacturer:
- Diodes Incorporated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AP7351D-12W5-7.pdf
- Description:
- LDO CMOS LOWCURR SOT25 T&R 3K
- Quantity:
- Payment:
- Shipping:
Inventory:4,836
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Product details
Overview
AP7351D-12W5-7 from Diodes Incorporated is a 150mA ultra-low quiescent current LDO regulator with fixed 1.2V output, ±1% accuracy at +25°C, 0.5µA quiescent current, and 1.4V to 5.5V input voltage range. It features enable control, active output discharge, and is optimized for battery-powered wearable electronics and IoT sensor modules.
For engineers reviewing the AP7351D-12W5-7 datasheet, AP7351D-12W5-7 pinout, AP7351D-12W5-7 application, or AP7351D-12W5-7 equivalent, key selection criteria include dropout voltage at 150mA (0.8V typ), standby current (0.02µA), PSRR (60dB @ 1kHz), thermal shutdown threshold (+160°C), and SOT25 package compatibility with standard PCB assembly processes.
Technical Context
The AP7351D-12W5-7 integrates a precision voltage reference, error amplifier, current-limit circuit, and enable logic in a single monolithic IC. Its internal resistor network fixes VOUT at 1.2V, eliminating external feedback components.
It delivers active output discharge via an internal 35Ω switch when EN is low, ensuring rapid VOUT decay during shutdown. Thermal protection triggers at +160°C with +20°C hysteresis, and the device operates across −40°C to +85°C ambient temperature with guaranteed 150mA output current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.2V ±1% at +25°C; supports stable biasing of low-voltage MCUs and sensors |
| Quiescent Current | 0.5µA typ; enables multi-year battery life in always-on wearables |
| Dropout Voltage | 0.8V typ at 150mA; allows operation down to 2.0V input for single-cell Li-ion or alkaline systems |
| PSRR | 60dB @ 1kHz; suppresses switching noise from upstream DC/DC converters |
| Enable Threshold | VEN(HI) ≥ 1.0V; compatible with 1.8V/3.3V GPIO without level-shifting |
| Thermal Shutdown | +160°C with +20°C hysteresis; prevents permanent damage during sustained overload |
| Output Discharge | 35Ω internal FET; discharges VOUT within microseconds after EN deactivation |
Pinout & Package
The AP7351D-12W5-7 uses the SOT25 (SC-74A) 5-pin package with exposed pad (EP) for thermal enhancement. Pin 4 is NC for fixed-output versions; EP must be connected to GND or large copper area for optimal thermal dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PIN1 (VOUT) | Regulated output node | Delivers stable 1.2V to load; requires 0.1µF ceramic capacitor placed adjacent to pin |
| PIN2 (GND) | Power ground reference | Primary return path for input/output current; must connect to low-impedance ground plane |
| PIN3 (EN) | Active-high enable control | Drives regulator ON/OFF; must not float; 0.4V max logic-low threshold ensures noise immunity |
| PIN4 (VIN) | Input power supply | Accepts 1.4–5.5V; requires local 0.1µF decoupling capacitor between VIN and GND |
| PIN5 (NC) | No connection | Not bonded internally; left unconnected per design; no electrical function |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 0.5µA typ enables >10-year battery life in coin-cell-powered devices |
| Active output discharge | 35Ω internal switch ensures VOUT decays rapidly (<1ms) upon shutdown, preventing back-powering |
| High PSRR at 1kHz | 60dB attenuation of ripple from noisy DC/DC sources improves signal integrity in analog/sensor circuits |
| Wide input voltage range | 1.4V–5.5V supports direct connection to single Li-ion, two alkaline, or USB-supplied systems |
| ±1% output accuracy | Tight regulation ensures reliable operation of 1.2V I/O domains and low-voltage microcontrollers |
Applications
| Wearable Fitness Tracker | IoT Environmental Sensor Node |
|---|---|
Use Scenario: Continuous heart-rate monitoring using optical sensor and BLE SoC powered by CR2032 coin cell. IC Role / Device Role / Timing Role: Primary 1.2V LDO supplying core logic and analog front-end of sensor subsystem. Use Value: 0.5µA quiescent current extends battery life beyond 2 years; active discharge prevents leakage into BLE radio during sleep mode. | Use Scenario: Battery-operated temperature/humidity sensor transmitting data hourly via LoRaWAN. IC Role / Device Role / Timing Role: Power management IC delivering regulated 1.2V to ultra-low-power MCU and sensor interface. Use Value: 150mA capability supports brief high-current RF transmission bursts; ±1% accuracy maintains ADC reference stability across temperature. |
| Wireless Camera Module | Medical Patch Monitor |
Use Scenario: Miniature HD camera module in smart home doorbell, powered by rechargeable Li-Po cell. IC Role / Device Role / Timing Role: Secondary LDO generating clean 1.2V for image signal processor and memory interface. Use Value: 60dB PSRR isolates sensitive imaging circuitry from switching noise generated by main PMIC; dropout <0.8V enables operation until battery reaches 2.0V. | Use Scenario: Disposable ECG patch worn for 72-hour continuous cardiac monitoring. IC Role / Device Role / Timing Role: Single-point power regulator for analog front-end, ADC, and Bluetooth LE transceiver. Use Value: 0.02µA standby current minimizes drain during deep-sleep intervals between measurements; thermal shutdown protects against skin-contact overheating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP7361D-12W5-7 | Higher 300mA output current; identical 1.2V output, ±1% accuracy, and 0.5µA IQ | Supports higher-current loads such as multi-core MCUs or RF transceivers requiring >150mA | Select when future design scaling requires headroom beyond 150mA without changing layout or enable logic |
| MCP1700T-1202E/TT | Same 1.2V output and 250mA rating but higher 1.9µA IQ; no active output discharge | Lacks fast VOUT decay on shutdown, risking back-powering in multi-rail systems | Choose only if active discharge is unnecessary and 1.9µA IQ remains acceptable for battery lifetime targets |
Compared with AP7351D-12W5-7, AP7361D-12W5-7 offers scalable current capacity while retaining identical quiescent performance and footprint, whereas MCP1700T-1202E/TT trades off discharge functionality and higher IQ for broader vendor availability and legacy design reuse.
Availability
AP7351D-12W5-7 is available at Aetrix Electronics and suitable for wearable electronics, IoT sensor nodes, wireless camera modules, and medical patch monitors requiring stable component supply with long-term lifecycle assurance.
Supply support for AP7351D-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 analog ICs, serving automotive, industrial, computing, and consumer markets with high-reliability, RoHS-compliant components.
The AP7351D belongs to Diodes' ultra-low-IQ LDO family, engineered specifically for extended battery life in space-constrained, always-on portable electronics where sub-1µA quiescent current and fast enable response are critical.
FAQ
What is the minimum input voltage required for AP7351D-12W5-7 to maintain regulation at full 150mA load?
The minimum input voltage is determined by dropout: at 150mA, typical dropout is 0.8V for 1.2V output, so VIN must be ≥ 2.0V. The datasheet specifies absolute minimum VIN as 1.4V, but regulation fails below 2.0V under full load. Operation at 1.4V is only valid for very light loads (<1mA).
Does AP7351D-12W5-7 require an external pull-up resistor on the EN pin?
No external pull-up is required. The EN pin has no internal pull-up; however, it must never be left floating. If enable control is unused, tie EN directly to VIN to ensure permanent activation. Driving EN with a microcontroller GPIO is preferred for dynamic control, provided the driver meets VIH ≥ 1.0V and VIL ≤ 0.4V.
Can AP7351D-12W5-7 be used with ceramic output capacitors smaller than 0.1µF?
No. The datasheet mandates a minimum 0.1µF ceramic capacitor (X5R/X7R) at the output for stability and transient response. Using smaller values risks oscillation or poor load-step recovery. The device is optimized for 0.1µF–10µF ceramic capacitors with ESR < 100mΩ.
Is the exposed pad (EP) on the SOT25 package electrically connected to GND?
No. The exposed pad is thermally conductive but electrically isolated. It may be connected to GND for improved heat dissipation or left floating, but must never be used as the sole GND connection. PIN2 (GND) remains the mandatory electrical ground terminal; EP serves only thermal enhancement.
AP7351D-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):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1.2V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.9V @ 150mA
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- 1 µA
- Current - Supply (Max):
- -
- PSRR:
- 60dB (1kHz)
- Control Features:
- Current Limit, Enable
- Protection Features:
- Over Current
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-25
AP7351D-12W5-7 FAQ
1.How can I place an order for AP7351D-12W5-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7351D-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 AP7351D-12W5-7 reliable?
The price and inventory of AP7351D-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 AP7351D-12W5-7 is usually 5 days.
3.What payment methods are accepted for AP7351D-12W5-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7351D-12W5-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7351D-12W5-7?
AP7351D-12W5-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7351D-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 AP7351D-12W5-7?
For technical support, including AP7351D-12W5-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7351D-12W5-7 requirements.
6.How does Aetrix verify that AP7351D-12W5-7 is sourced from the original manufacturer or authorized distributors?
All AP7351D-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 AP7351D-12W5-7 meets industry standards.
7.What is the process for return or replacement of AP7351D-12W5-7?
All AP7351D-12W5-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7351D-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 AP7351D-12W5-7 part is unused and in its original packaging.
Return procedure for AP7351D-12W5-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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