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Diodes Incorporated AP7333-25SAG-7
- Part No.:
- AP7333-25SAG-7
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
AP7333-25SAG-7.pdf
- Description:
- IC REG LINEAR 2.5V 300MA SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:37,549
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Product details
Overview
AP7333-25SAG-7 from Diodes Incorporated is a 300mA fixed-output (2.5V) low-dropout linear regulator in SOT23 package, featuring 65µA quiescent current, 300mV dropout at full load, and 65dB PSRR at 100Hz. It delivers stable voltage for battery-powered wireless LAN cards and XDSL routers requiring fast transient response and minimal power loss.
For engineers reviewing the AP7333-25SAG-7 datasheet, AP7333-25SAG-7 pinout, AP7333-25SAG-7 application, or AP7333-25SAG-7 equivalent, key selection criteria include dropout voltage under 300mA load, compatibility with 1µF ceramic output capacitors, thermal shutdown threshold at 140°C, and SOT23 pin assignment with IN–OUT–GND configuration.
Technical Context
The AP7333-25SAG-7 integrates a PMOS pass element, bandgap reference, error amplifier, and protection circuitry (current limit, short-circuit, thermal shutdown). Its architecture enables ultra-fast 80µs start-up and excellent load transient response without minimum load requirement.
Designed for low-power systems, it operates across 2V–6V input while maintaining ±2% output accuracy over –40°C to +85°C ambient. The device achieves 65dB PSRR at 100Hz and sustains regulation with 1µF ceramic output capacitor due to internal compensation optimized for low-ESR capacitors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.5V ±2% over temperature and load ensures stable supply for 2.5V logic and analog circuits. |
| Max Output Current | 300mA continuous - sufficient to power baseband ICs, USB peripherals, or sensor signal chains. |
| Dropout Voltage | 300mV typical at 300mA - enables operation down to 2.8V input for 2.5V rail in single-cell Li-ion or dual-cell alkaline systems. |
| Quiescent Current | 65µA typical at full load - minimizes standby power loss in always-on IoT nodes and remote sensors. |
| PSRR | 65dB at 100Hz - suppresses ripple from noisy DC-DC converters feeding the LDO input. |
| Start-up Time | 80µs - supports rapid wake-up from deep sleep in portable devices without brownout risk. |
| Thermal Shutdown | Triggers at 140°C with 15°C hysteresis - prevents permanent damage during sustained overload or poor PCB thermal design. |
Pinout & Package
AP7333-25SAG-7 uses the SOT23-3 package (2.92mm × 1.3mm × 1.0mm), RoHS-compliant and green molding compound. Pinout follows standard SOT23 top-view orientation: Pin 1 = IN, Pin 2 = OUT, Pin 3 = GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN (Pin 1) | Input voltage supply | Accepts 2V–6V; requires ≥1µF ceramic bypass capacitor placed adjacent to pin to suppress high-frequency noise and ensure stability. |
| OUT (Pin 2) | Regulated output | Delivers fixed 2.5V; stable with 1µF–4.7µF X7R/X5R ceramic capacitors; no minimum load required. |
| GND (Pin 3) | Power ground reference | Common return path for input/output capacitors and load; must connect to low-impedance ground plane to maintain PSRR and transient performance. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 65µA across full 0–300mA load range preserves battery runtime in always-on sensor nodes. |
| Fast transient response | Stabilizes within microseconds during 0→300mA load steps - critical for GSM/TDMA baseband power domains. |
| Low-ESR capacitor compatibility | Stable with 1µF ceramic output capacitor (10–200mΩ ESR) - reduces BOM cost and board area vs. tantalum alternatives. |
| Integrated protection | Current limit (~600mA), short-circuit clamp (~100mA), and thermal shutdown (140°C) eliminate need for external fault management circuitry. |
| No minimum load requirement | Maintains regulation at zero load - simplifies design for intermittent-use peripherals like Bluetooth modules. |
Applications
| Wireless LAN Cards | XDSL Routers |
|---|---|
Use Scenario: Powering 2.5V RF transceivers and MAC controllers in compact PCIe Mini Card form factor. IC Role / Device Role / Timing Role: Primary 2.5V LDO supplying noise-sensitive WLAN PHY and digital baseband blocks. Use Value: 65dB PSRR at 100Hz rejects switching noise from upstream DC-DC converters; 80µs start-up enables rapid link re-establishment after sleep. | Use Scenario: Regulating 2.5V supply for ADSL line drivers and DSP cores in residential gateways. IC Role / Device Role / Timing Role: Local point-of-load regulator delivering clean 2.5V to analog front-end and packet processing units. Use Value: 300mV dropout allows operation from 2.8V intermediate rail; fast load transient response prevents data corruption during burst traffic. |
| Battery-Powered Sensors | USB Peripheral Controllers |
Use Scenario: Supplying 2.5V to ultra-low-power environmental sensors and BLE SoCs in coin-cell–powered nodes. IC Role / Device Role / Timing Role: Standby-mode LDO providing regulated voltage during extended sleep intervals between measurements. Use Value: 65µA IQ extends 200mAh CR2032 battery life beyond 3 years in 1-minute sampling interval applications. | Use Scenario: Powering 2.5V USB 2.0 transceivers and hub controllers in embedded host designs. IC Role / Device Role / Timing Role: Dedicated LDO isolating USB PHY from noisy system rails and enabling hot-plug compliance. Use Value: Small overshoot/undershoot during plug-in events prevents enumeration failures; 1µF output cap meets USB EMI requirements without added filtering. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed-output LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700-2502E/TO | 250mA max output, 1.6µA IQ, 600mV dropout at 250mA | Limited to lower-current loads; superior IQ but higher dropout compromises efficiency in low-VIN scenarios | Select when ultra-low standby current outweighs output current capability and VIN margin is ample |
| TCS2102-2500 | 300mA, 75µA IQ, 400mV dropout at 300mA, 70dB PSRR at 100Hz | Slightly higher dropout and IQ; improved PSRR benefits noise-critical audio subsystems | Prefer where PSRR >65dB is mandatory and thermal derating margin permits 400mV dropout |
Compared with MCP1700-2502E/TO and TCS2102-2500, AP7333-25SAG-7 offers optimal balance of 300mA drive, 300mV dropout, and 65µA IQ - making it ideal for space-constrained, battery-operated 2.5V systems where both load capability and efficiency matter.
Availability
AP7333-25SAG-7 is available at Aetrix Electronics and suitable for wireless LAN cards, XDSL routers, and battery-powered sensors requiring stable component supply, consistent parametric performance, and long-term production continuity.
Supply support for AP7333-25SAG-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, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.
The AP7333 belongs to Diodes' precision LDO portfolio targeting portable and energy-efficient applications, engineered specifically for fast transient response, ultra-low quiescent current, and robust protection in space-constrained designs.
FAQ
What is the maximum input voltage rating for AP7333-25SAG-7?
The absolute maximum input voltage is 7V, but recommended operating range is 2V to 6V. Exceeding 6V risks violating safe operating area limits and may trigger thermal shutdown prematurely, especially at high ambient temperatures or heavy load conditions. Operation above 6V voids guaranteed specifications per datasheet Section 4.
Can AP7333-25SAG-7 operate without an output capacitor?
No - an output capacitor is mandatory for stability. The device is designed to be stable with 1µF to 4.7µF ceramic capacitors (X7R/X5R, 10–200mΩ ESR). Omitting the output capacitor causes oscillation and unregulated output, potentially damaging downstream circuitry. Zero-load operation is supported, but capacitor presence is non-negotiable.
Does AP7333-25SAG-7 require a minimum load current to maintain regulation?
No - the AP7333-25SAG-7 remains stable and fully regulated at zero load current. This is confirmed in the datasheet's "No Load Stability" section (Page 9) and electrical characteristics table (Page 5), where load regulation is specified from 1mA to 300mA, and startup time is tested at no load. No pull-down resistor or dummy load is needed.
How does the thermal shutdown behavior manifest under sustained overload?
When junction temperature reaches ~140°C, the output disables; it re-enables once temperature falls to ~125°C due to 15°C hysteresis. Under continuous overload, this causes on/off cycling - observable as output voltage pulsing at low frequency. This protects the die but indicates inadequate heatsinking or excessive power dissipation; PCB layout must follow AP02001 pad recommendations to avoid premature shutdown.
AP7333-25SAG-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.55V @ 300mA
- Current - Output:
- 300mA
- Current - Quiescent (Iq):
- 75 µA
- Current - Supply (Max):
- 85 µA
- PSRR:
- 65dB (100Hz)
- Control Features:
- -
- Protection Features:
- Over Current, Over Temperature, Short Circuit
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
AP7333-25SAG-7 FAQ
1.How can I place an order for AP7333-25SAG-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7333-25SAG-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 AP7333-25SAG-7 reliable?
The price and inventory of AP7333-25SAG-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7333-25SAG-7 is usually 5 days.
3.What payment methods are accepted for AP7333-25SAG-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7333-25SAG-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7333-25SAG-7?
AP7333-25SAG-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7333-25SAG-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 AP7333-25SAG-7?
For technical support, including AP7333-25SAG-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7333-25SAG-7 requirements.
6.How does Aetrix verify that AP7333-25SAG-7 is sourced from the original manufacturer or authorized distributors?
All AP7333-25SAG-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 AP7333-25SAG-7 meets industry standards.
7.What is the process for return or replacement of AP7333-25SAG-7?
All AP7333-25SAG-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7333-25SAG-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 AP7333-25SAG-7 part is unused and in its original packaging.
Return procedure for AP7333-25SAG-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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