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Diodes Incorporated AP7333-12SAG-7
- Part No.:
- AP7333-12SAG-7
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
AP7333-12SAG-7.pdf
- Description:
- IC REG LINEAR 1.2V 300MA SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:2,657
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Product details
Overview
AP7333-12SAG-7 from Diodes Incorporated is a 300mA fixed-output (1.2V) low-dropout linear regulator in SOT23 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 microcontrollers and RF front-ends in portable electronics.
For engineers reviewing the AP7333-12SAG-7 datasheet, AP7333-12SAG-7 pinout, AP7333-12SAG-7 application, or AP7333-12SAG-7 equivalent, key selection criteria include ultra-low IQ for battery runtime, fast 80µs startup for duty-cycled systems, thermal shutdown threshold at 140°C, and compatibility with minimal 1µF output capacitance in space-constrained designs.
Technical Context
The AP7333-12SAG-7 integrates a PMOS pass element, bandgap reference, error amplifier, and protection circuitry (current limit, short-circuit, thermal shutdown) in a single monolithic IC. 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%. The device's 207°C/W θJA (SOT23) enables operation up to 300mA under typical PCB thermal conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.2V ±2% - ensures stable core voltage for 1.2V I/O or logic rails |
| Max Output Current | 300mA continuous - sufficient for MCU cores, sensors, or small RF ICs |
| Quiescent Current | 65µA typical at full load - extends battery life in always-on sensor nodes |
| Dropout Voltage | 300mV typical at 300mA - allows operation down to 1.5V input for single-cell Li-ion or NiMH |
| PSRR | 65dB at 100Hz - suppresses low-frequency noise from switching DC/DC stages |
| Start-up Time | 80µs - enables rapid wake-up from deep sleep in energy-harvesting systems |
| Thermal Shutdown | 140°C threshold with 15°C hysteresis - prevents permanent damage during sustained overload |
| Capacitor Stability | Stable with 1µF X7R/X5R ceramic - eliminates need for bulky tantalum or electrolytic caps |
Pinout & Package
SOT23-3 package: compact 2.9mm × 1.6mm surface-mount outline with gull-wing leads, RoHS-compliant lead-free finish, and green molding compound (no Br/Sb).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Input voltage supply | Accepts 2V–6V; requires ≥1µF ceramic bypass to GND for stability and noise rejection |
| 2 (OUT) | Regulated output | Delivers fixed 1.2V; connects directly to load with minimal trace length to reduce EMI |
| 3 (GND) | Power ground reference | Common return path for IN and OUT; must be tied to low-impedance PCB ground plane |
Key Features
| Feature | Design Value |
|---|---|
| No minimum load requirement | Maintains regulation at 0mA output - simplifies design for intermittent-sensing applications |
| Fast transient response | Stabilizes within microseconds after 0→300mA load step - prevents brownout in DSP/GSM baseband circuits |
| Short-circuit current limit | Clamps to ~100mA when VOUT < 200mV - protects against accidental board shorts without latch-off |
| Low ESR capacitor support | Operates stably with 10–200mΩ ESR output caps - enables use of cost-effective, high-reliability ceramics |
| Ultra-low IQ over full range | 65µA at 300mA and 55–75µA at zero load - minimizes standby power in IoT endpoints |
Applications
| Wireless LAN Modules | GSM Baseband Power |
|---|---|
Use Scenario: Powering 2.4GHz WLAN transceivers (e.g., ESP32-WROOM) in battery-operated access points. IC Role / Device Role / Timing Role: Primary 1.2V LDO for RF IC digital core and analog PHY blocks. Use Value: 80µs startup synchronizes with MAC-layer wake events; 65dB PSRR isolates WLAN from noisy DC/DC converters. | Use Scenario: Supplying GSM chipset baseband processor during TDMA transmit bursts. IC Role / Device Role / Timing Role: Fast-transient LDO delivering 1.2V to ARM9 core during 577µs transmit slots. Use Value: Sub-100µs load recovery prevents clock jitter and bit errors during 12.5% duty-cycle bursts. |
| USB-C Powered Peripherals | Industrial Sensor Nodes |
Use Scenario: Regulating 5V USB-C source down to 1.2V for embedded microcontroller logic. IC Role / Device Role / Timing Role: Input-stage LDO following USB-C PD controller, feeding MCU VDDIO rail. Use Value: 300mV dropout enables >90% efficiency at 3.3V input; thermal shutdown prevents overheating during hot-plug events. | Use Scenario: Powering ultra-low-power environmental sensors (e.g., BME280) in solar-charged field nodes. IC Role / Device Role / Timing Role: Standby-mode LDO supplying 1.2V to sensor interface and BLE radio during periodic wake cycles. Use Value: 65µA IQ extends multi-year battery life; no-load stability avoids external bleed resistors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed-output LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP2204-1.2TRG1 | Higher IQ (120µA), same 300mA rating, SOT23-3 pinout | Lacks fast transient response spec; slower start-up (~200µs) | Choose if lower cost is critical and transient performance is non-critical |
| MCP1700T-1202E/TT | 250mA max, 1.8µA IQ, SOT23-3 compatible pinout | Optimized for micropower (not fast transient); lower PSRR (55dB @ 100Hz) | Prefer for sub-100µA standby systems where burst loads are absent |
Compared with AP2204-1.2TRG1 and MCP1700T-1202E/TT, the AP7333-12SAG-7 uniquely balances ultra-low IQ (65µA), fast 80µs startup, and robust 300mA transient capability-making it optimal for battery-powered wireless devices requiring both longevity and responsiveness.
Availability
AP7333-12SAG-7 is available at Aetrix Electronics and suitable for wireless LAN modules, GSM baseband power supplies, and USB-C powered peripherals requiring stable component supply, consistent parametric performance, and long-term production continuity.
Supply support for AP7333-12SAG-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 for industrial, computing, and consumer markets.
The AP7333 belongs to Diodes' low-quiescent-current LDO family, engineered specifically for portable and battery-powered applications demanding extended runtime, fast dynamic response, and minimal external components.
FAQ
What is the maximum input voltage for AP7333-12SAG-7?
The absolute maximum input voltage is 7V, but the recommended operating range is 2V to 6V. Operation above 6V risks exceeding absolute maximum ratings and may trigger thermal shutdown or degrade long-term reliability. For 5V USB-derived inputs, the 300mV dropout ensures safe 1.2V output even with line droop.
Can AP7333-12SAG-7 operate without an output capacitor?
No-while the device remains stable with only 1µF ceramic output capacitance, operation without any output capacitor violates the stability requirements defined in the datasheet. Omitting COUT causes oscillation, excessive overshoot/undershoot, and potential damage to downstream circuitry during load transients.
Does AP7333-12SAG-7 require a minimum load current?
No. The AP7333-12SAG-7 is explicitly specified for no-load stability across its full temperature and input voltage range. This eliminates the need for external bleed resistors and reduces standby power consumption in always-on sensor or real-time clock applications.
How does the thermal shutdown behave 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 results in controlled on/off cycling-limiting average power dissipation and preventing permanent damage while maintaining system-level fault tolerance.
AP7333-12SAG-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:
- SOT-23-3
AP7333-12SAG-7 FAQ
1.How can I place an order for AP7333-12SAG-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7333-12SAG-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 AP7333-12SAG-7 reliable?
The price and inventory of AP7333-12SAG-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7333-12SAG-7 is usually 5 days.
3.What payment methods are accepted for AP7333-12SAG-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7333-12SAG-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7333-12SAG-7?
AP7333-12SAG-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7333-12SAG-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 AP7333-12SAG-7?
For technical support, including AP7333-12SAG-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7333-12SAG-7 requirements.
6.How does Aetrix verify that AP7333-12SAG-7 is sourced from the original manufacturer or authorized distributors?
All AP7333-12SAG-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 AP7333-12SAG-7 meets industry standards.
7.What is the process for return or replacement of AP7333-12SAG-7?
All AP7333-12SAG-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7333-12SAG-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 AP7333-12SAG-7 part is unused and in its original packaging.
Return procedure for AP7333-12SAG-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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