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Diodes Incorporated AP7333-12SRG-7
- Part No.:
- AP7333-12SRG-7
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
AP7333-12SRG-7.pdf
- Description:
- IC REG LINEAR 1.2V 300MA SOT23R
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
AP7333-12SRG-7 from Diodes Incorporated is a 300mA fixed-output (1.2V) low-dropout linear regulator in SOT23R package, featuring 65µA quiescent current, 300mV dropout at full load, 65dB PSRR at 100Hz, and stable operation with 1µF ceramic output capacitor. It serves as a primary power supply for low-power digital ICs in battery-powered systems.
For engineers reviewing the AP7333-12SRG-7 datasheet, AP7333-12SRG-7 pinout, AP7333-12SRG-7 application, or AP7333-12SRG-7 equivalent, key selection criteria include dropout voltage under 300mA load, ultra-low IQ across 2–6V input range, fast 80µs start-up, thermal shutdown threshold at 140°C, and compatibility with 1µF low-ESR ceramic output capacitors.
Technical Context
The AP7333-12SRG-7 integrates a PMOS pass element, bandgap reference, error amplifier, and protection circuitry (current limit, short-circuit, thermal shutdown) in a single die. Its architecture enables stable regulation without minimum load and supports rapid transient response from 0 to 300mA.
Designed for input voltages from 2V to 6V, it delivers precise 1.2V ±2% output across –40°C to +85°C ambient, with line regulation of 0.01–0.20%/V and load regulation of ±0.6% over full current range. Thermal resistance is 230°C/W in SOT23R package.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.2V ±2% - ensures stable core voltage for 1.2V logic rails and low-voltage microcontrollers |
| Max Output Current | 300mA continuous - sufficient to power baseband processors, RF transceivers, or sensor interfaces |
| Quiescent Current | 65µA typical at full load - minimizes standby power loss in always-on battery applications |
| Dropout Voltage | 300mV typical at 300mA - enables operation down to 1.5V input while maintaining 1.2V output |
| PSRR | 65dB at 100Hz - suppresses low-frequency ripple from switching DC/DC stages upstream |
| Start-up Time | 80µs - supports rapid wake-up from deep-sleep modes in portable devices |
| Thermal Shutdown | 140°C trigger with 15°C hysteresis - provides self-recovery protection during sustained overload |
Pinout & Package
SOT23R package: 3-pin surface-mount, RoHS-compliant, green molding compound, 230°C/W junction-to-ambient thermal resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (GND) | Ground reference | Return path for internal bias and output current; must be connected to low-impedance PCB ground plane |
| 2 (OUT) | Regulated output | Delivers stable 1.2V to load; requires 1µF ceramic capacitor placed adjacent to pin |
| 3 (IN) | Input supply | Accepts 2–6V input; bypassed with ≥1µF ceramic capacitor to suppress high-frequency noise |
Key Features
| Feature | Design Value |
|---|---|
| No minimum load requirement | Maintains regulation and stability even at 0mA output - eliminates need for dummy loads in sleep-mode circuits |
| Fast transient response | Stabilizes within microseconds during 0–300mA load steps - prevents brown-out in DSP/GSM baseband ICs |
| Low-ESR capacitor support | Stable with 1µF X7R/X5R ceramic capacitors (10–200mΩ ESR) - reduces BOM cost and board area vs. tantalum |
| Integrated protection | Current limit (~600mA), short-circuit clamp (~100mA), and thermal shutdown - eliminates need for external fault management |
Applications
| Wireless LAN Modules | XDSL Router Power Rails |
|---|---|
Use Scenario: Powering 2.4GHz/5GHz RF transceivers and MAC controllers in compact Wi-Fi modules. IC Role / Device Role / Timing Role: Primary 1.2V LDO supplying core logic and PLL circuitry of WLAN SoCs. Use Value: 80µs start-up enables synchronized wake-up with host processor; 65µA IQ extends battery runtime in portable access points. | Use Scenario: Generating clean 1.2V supply for DSL PHY and ATM layer processors in residential gateways. IC Role / Device Role / Timing Role: Post-regulator after buck converter, rejecting switching noise via 65dB PSRR at 100Hz. Use Value: Low dropout allows operation from 1.5V intermediate rail; thermal shutdown prevents failure during sustained ADSL2+ line faults. |
| Notebook Keyboard/Touchpad | USB Peripheral Controllers |
Use Scenario: Supplying 1.2V to low-power microcontrollers and capacitive sensing ICs in laptop input subsystems. IC Role / Device Role / Timing Role: Always-on LDO powering wake-on-keypress logic independent of main system rail. Use Value: 65µA IQ meets USB suspend current limits; no-load stability avoids leakage-induced reset on idle. | Use Scenario: Providing regulated 1.2V to USB 2.0 transceiver PHY and hub controller logic. IC Role / Device Role / Timing Role: Local point-of-load regulator decoupling high-speed data lines from noisy system supplies. Use Value: Fast transient response prevents data corruption during USB packet bursts; 1µF ceramic compatibility simplifies layout near connector. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed-output LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-1202E/TT | 250mA max output, 1.8µA IQ, SOT23-3 package (IN-GND-OUT pinout) | Limited to lighter loads; ultra-low IQ suits multi-year coin-cell applications | Select when <250mA load and sub-5µA standby current dominate design priorities |
| Torex XC6206P122MR-G | 300mA, 1.0µA IQ, but 1.2V output accuracy ±3% and 400mV dropout at 300mA | Higher dropout and looser tolerance reduce margin in 1.5V-input systems | Choose only if ultra-low IQ outweighs tighter regulation and lower dropout requirements |
Compared with MCP1700T-1202E/TT and XC6206P122MR-G, the AP7333-12SRG-7 uniquely balances 300mA capability, 65µA IQ, 300mV dropout, and ±2% accuracy - making it optimal for 1.2V FPGA I/O banks, GSM baseband cores, and other mid-current, precision low-power rails.
Availability
AP7333-12SRG-7 is available at Aetrix Electronics and suitable for wireless LAN modules, XDSL router power rails, and notebook keyboard subsystems requiring stable component supply with guaranteed long-term sourcing.
Supply support for AP7333-12SRG-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, specializing in high-reliability power management, signal integrity, and protection solutions.
The AP7333 belongs to Diodes' low-quiescent-current LDO family, engineered specifically for battery-powered portable electronics where extended runtime, fast dynamic response, and small-footprint power delivery are critical.
FAQ
What is the maximum input voltage rating for AP7333-12SRG-7?
The absolute maximum input voltage is 7V, but the recommended operating range is 2V to 6V. Exceeding 6V risks violating safe operating area limits, especially under high ambient temperature or heavy load conditions. Operation above 6V may trigger thermal shutdown or degrade long-term reliability, even if within instantaneous absolute ratings.
Can AP7333-12SRG-7 operate without an output capacitor?
No - an output capacitor is mandatory for stability. The device requires ≥1µF ceramic capacitor (X7R/X5R, 10–200mΩ ESR) between OUT and GND. Omitting it causes oscillation and unregulated output. Unlike some LDOs, AP7333-12SRG-7 does not support capacitor-free operation, even at no load.
How does the current limit protection behave during short-circuit events?
Under short-circuit (VOUT < 200mV), the device clamps output current to ~100mA and enters thermal cycling if power dissipation exceeds safe limits. This differs from normal current limit (~600mA at VOUT/ROUT = 1A), providing dedicated low-current fault containment to prevent PCB trace damage and excessive junction heating.
Is AP7333-12SRG-7 compatible with lead-free reflow profiles?
Yes - it is RoHS-compliant with lead-free finish and qualified for standard JEDEC J-STD-020D reflow profiles, including peak temperatures up to 260°C. The SOT23R package uses green molding compound (no Br/Sb) and withstands three reflow cycles without degradation of electrical performance or wire bond integrity.
AP7333-12SRG-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):
- 1.2V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- -
- 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:
- SOT23R
AP7333-12SRG-7 FAQ
1.How can I place an order for AP7333-12SRG-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7333-12SRG-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 AP7333-12SRG-7 reliable?
The price and inventory of AP7333-12SRG-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7333-12SRG-7 is usually 5 days.
3.What payment methods are accepted for AP7333-12SRG-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7333-12SRG-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7333-12SRG-7?
AP7333-12SRG-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7333-12SRG-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 AP7333-12SRG-7?
For technical support, including AP7333-12SRG-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7333-12SRG-7 requirements.
6.How does Aetrix verify that AP7333-12SRG-7 is sourced from the original manufacturer or authorized distributors?
All AP7333-12SRG-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 AP7333-12SRG-7 meets industry standards.
7.What is the process for return or replacement of AP7333-12SRG-7?
All AP7333-12SRG-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7333-12SRG-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 AP7333-12SRG-7 part is unused and in its original packaging.
Return procedure for AP7333-12SRG-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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