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Diodes Incorporated AP7313-33SRG-7
- Part No.:
- AP7313-33SRG-7
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
AP7313-33SRG-7.pdf
- Description:
- IC REG LIN 3.3V 150MA SOT23R-3
- Quantity:
- Payment:
- Shipping:
Inventory:48,021
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Product details
Overview
AP7313-33SRG-7 from Diodes Incorporated is a 150mA fixed-output (3.3V) low-dropout linear regulator in SOT23R package, featuring 65µA quiescent current, 150mV dropout at full load, and 65dB PSRR at 100Hz. It delivers stable voltage to battery-powered portable devices with fast 80µs startup and excellent transient response.
For engineers reviewing the AP7313-33SRG-7 datasheet, AP7313-33SRG-7 pinout, AP7313-33SRG-7 application, or AP7313-33SRG-7 equivalent, key selection criteria include low-IQ operation across 2–6V input, compatibility with 1µF ceramic output capacitors, thermal shutdown at 140°C, and SOT23R pin configuration for PCB layout optimization.
Technical Context
The AP7313-33SRG-7 integrates a PMOS pass element, precision bandgap reference, error amplifier, and protection circuitry (current limit, short-circuit, thermal shutdown). Its architecture enables stable regulation without minimum load and supports ultra-fast load transients from 1mA to 150mA.
Designed for single-supply systems, it operates over –40°C to +85°C ambient, maintains ±2% output accuracy across temperature and load, and achieves 0.01–0.20%/V line regulation. The SOT23R package provides 230°C/W junction-to-ambient thermal resistance under standard FR-4 mounting conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3V ±2% - ensures precise rail generation for 3.3V logic and interface ICs without external feedback. |
| Max Output Current | 150mA - sufficient for microcontrollers, sensors, and RF front-ends in space-constrained portable designs. |
| Quiescent Current | 65µA typical at 150mA - enables multi-year battery life in always-on IoT endpoints and standby circuits. |
| Dropout Voltage | 150mV typical at 150mA - allows operation down to 3.45V input while sustaining 3.3V output, critical for single-cell Li-ion or alkaline systems. |
| PSRR | 65dB at 100Hz - suppresses low-frequency power supply noise from DC-DC converters or noisy digital rails. |
| Start-up Time | 80µs - supports rapid wake-from-sleep sequences in GSM/TDMA baseband and DSP subsystems. |
| Stability | With 1µF X7R/X5R ceramic capacitor - eliminates need for bulky tantalum or electrolytic output caps, reducing BOM count and board area. |
Pinout & Package
SOT23R package: 3-pin, RoHS-compliant, green molding compound; footprint per Diodes Inc. AP02001 pad layout; thermal resistance θJA = 230°C/W on 2oz FR-4.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - GND | Ground reference | Low-impedance return path for internal bias and output current; must connect to solid ground plane for thermal and noise performance. |
| 2 - OUT | Regulated output | Delivers 3.3V to load; requires local 1µF ceramic capacitor placed adjacent to pin for transient stability. |
| 3 - IN | Input supply | Accepts 2–6V input; bypassed with ≥1µF ceramic cap close to pin to suppress high-frequency noise and ripple. |
Key Features
| Feature | Design Value |
|---|---|
| No minimum load requirement | Maintains regulation and stability at 0mA output - simplifies design for intermittent-load applications like sensor wake cycles. |
| Fast transient response | Controls overshoot/undershoot during 0→150mA load steps - protects sensitive 3.3V logic (e.g., GSM baseband, audio codecs) from voltage glitches. |
| Integrated protection | Current limit (~300mA), short-circuit clamp (~50mA), and thermal shutdown (140°C with 15°C hysteresis) - eliminates need for external fault management circuitry. |
| Ultra-low ESR capacitor support | Stable with 10–200mΩ output capacitor ESR - enables use of compact, low-cost X7R ceramics instead of higher-ESR alternatives. |
Applications
| Portable Medical Sensors | GSM Baseband Power |
|---|---|
|
Use Scenario: Wearable pulse oximeter operating from coin cell with intermittent LED and ADC sampling. IC Role / Device Role / Timing Role: Primary 3.3V LDO supplying MCU, analog front-end, and optical driver. Use Value: 65µA quiescent current extends battery life beyond 12 months; 80µs startup enables immediate measurement on wake. |
Use Scenario: TDMA-based GSM handset requiring rapid power cycling between transmit/receive bursts. IC Role / Device Role / Timing Role: Local 3.3V rail for baseband processor and RF synthesizer. Use Value: Fast load transient response prevents voltage droop during 12.5% duty-cycle transmit pulses, ensuring signal integrity. |
| Industrial Handheld Terminals | USB Peripheral Controllers |
|
Use Scenario: Ruggedized barcode scanner powered by rechargeable Li-ion, operating across –20°C to 70°C. IC Role / Device Role / Timing Role: Main system regulator for ARM Cortex-M core and display driver. Use Value: ±2% output accuracy and –40°C to +85°C rating ensure reliable operation in variable environmental conditions. |
Use Scenario: USB-to-UART bridge IC requiring clean 3.3V supply from 5V USB VBUS. IC Role / Device Role / Timing Role: Post-regulator filtering noise from switched-mode USB power delivery. Use Value: 65dB PSRR at 100Hz attenuates switching artifacts from upstream DC-DC, preventing UART bit errors. |
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-3302E/TT | 250mA output, 1.8µA IQ, SOT23-3 package (IN-GND-OUT pinout) | Lacks short-circuit protection; lower IQ but higher dropout (600mV @ 250mA) | Prefer for ultra-low-power, low-current (<50mA) applications where protection is handled externally. |
| TPS70633DBVR | 150mA output, 9.5µA IQ, SOT23-5 (with enable pin); 220mV dropout @ 150mA | Requires external enable control; higher PSRR (70dB @ 100Hz) but larger footprint | Choose when system-level power sequencing or deeper sleep modes require active enable control. |
Compared with MCP1700T-3302E/TT and TPS70633DBVR, the AP7313-33SRG-7 uniquely balances ultra-low IQ (65µA), robust integrated protection, and SOT23R's optimized thermal layout-making it ideal for cost-sensitive, space-constrained portable designs needing self-contained reliability.
Availability
AP7313-33SRG-7 is available at Aetrix Electronics and suitable for portable medical sensors, GSM baseband power, industrial handheld terminals, and USB peripheral controllers requiring stable component supply with consistent lead times and full traceability.
Supply support for AP7313-33SRG-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 AP7313 belongs to Diodes' low-quiescent-current LDO family, engineered specifically for battery-powered portable electronics demanding long runtime, fast dynamic response, and robust fault tolerance in minimal footprint.
FAQ
What is the recommended input and output capacitor configuration for AP7313-33SRG-7?
Use a minimum 1µF X7R or X5R ceramic capacitor between IN and GND, placed as close as possible to the device. For the output, a 1µF to 4.7µF ceramic capacitor with 10–200mΩ ESR is recommended and must be located adjacent to the OUT and GND pins. No minimum load capacitance is required for stability.
Does AP7313-33SRG-7 require an external enable signal or power-good indicator?
No. The AP7313-33SRG-7 is a three-terminal LDO with no enable pin or power-good output. It starts regulating automatically when input voltage exceeds ~2.0V and remains active as long as VIN stays within 2–6V and thermal limits are not exceeded.
How does thermal shutdown behave under sustained overload conditions?
When junction temperature reaches ~140°C, the device disables the output. It re-enables once the junction cools to ~125°C, creating controlled on/off cycling. This hysteresis prevents latch-up and protects against permanent damage during continuous overloads or poor PCB heat sinking.
Can AP7313-33SRG-7 be used with input voltages below 2.0V?
No. The absolute minimum input voltage is 2.0V per recommended operating conditions. Operation below this risks loss of regulation, increased dropout, or failure to start up. For sub-2V inputs, consider alternative LDOs rated for lower VIN or buck-boost regulators.
AP7313-33SRG-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):
- 3.3V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.3V @ 150mA
- Current - Output:
- 150mA
- 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
AP7313-33SRG-7 FAQ
1.How can I place an order for AP7313-33SRG-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7313-33SRG-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 AP7313-33SRG-7 reliable?
The price and inventory of AP7313-33SRG-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7313-33SRG-7 is usually 5 days.
3.What payment methods are accepted for AP7313-33SRG-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7313-33SRG-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7313-33SRG-7?
AP7313-33SRG-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7313-33SRG-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 AP7313-33SRG-7?
For technical support, including AP7313-33SRG-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7313-33SRG-7 requirements.
6.How does Aetrix verify that AP7313-33SRG-7 is sourced from the original manufacturer or authorized distributors?
All AP7313-33SRG-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 AP7313-33SRG-7 meets industry standards.
7.What is the process for return or replacement of AP7313-33SRG-7?
All AP7313-33SRG-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7313-33SRG-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 AP7313-33SRG-7 part is unused and in its original packaging.
Return procedure for AP7313-33SRG-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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