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Diodes Incorporated AP7313-18SAG-7
- Part No.:
- AP7313-18SAG-7
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
AP7313-18SAG-7.pdf
- Description:
- IC REG LINEAR 1.8V 150MA SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:26,559
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Product details
Overview
AP7313-18SAG-7 from Diodes Incorporated is a 150mA, fixed 1.8V output, low dropout linear regulator in SOT23 package with 65µA quiescent current, 150mV typical dropout at full load, and 65dB PSRR at 100Hz - designed for battery-powered portable devices requiring stable low-power voltage regulation.
For engineers reviewing the AP7313-18SAG-7 datasheet, AP7313-18SAG-7 pinout, AP7313-18SAG-7 application, or AP7313-18SAG-7 equivalent, key selection criteria include ultra-low IQ across input range (2–6V), fast 80µs startup, stability with 1µF ceramic output capacitor, and integrated thermal shutdown, current limit, and short-circuit protection.
Technical Context
The AP7313-18SAG-7 integrates a PMOS pass element, precision band-gap reference, error amplifier, and protection circuitry (current limit, thermal shutdown, short-circuit clamp) in a single monolithic IC. Its architecture enables low dropout operation without external compensation.
It delivers regulated 1.8V ±2% over –40°C to +85°C ambient, supports 0–150mA load with no minimum load requirement, and maintains stability with 1µF X7R/X5R ceramic output capacitors (ESR 10–200mΩ), eliminating need for tantalum or electrolytic types.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8V ±2% - ensures precise core voltage for 1.8V logic rails in portable SoCs and microcontrollers. |
| Quiescent Current | 65µA typical at 150mA load - minimizes standby power loss in always-on battery systems like IoT sensors. |
| Dropout Voltage | 150mV typical at 150mA - enables regulation from 1.95V input, extending usable battery life down to near-dead cell voltage. |
| PSRR | 65dB at 100Hz - suppresses low-frequency ripple from switching DC/DC stages upstream of LDO. |
| Start-up Time | 80µs - allows rapid wake-up from deep sleep in GSM/TDMA baseband circuits with burst-mode loads. |
| Load Transient Response | Controlled overshoot/undershoot during 0→150mA step - sustains stable supply to fast-switching DSPs without external bulk capacitance. |
| Protection Features | Thermal shutdown (140°C), current limit (200–300mA), short-circuit clamp (50mA) - enable robust operation in unattended embedded deployments. |
Pinout & Package
SOT23-3 package (2.92 × 1.3 × 1.0 mm, JEDEC MO-178AA), lead-free/RoHS-compliant, "Green" molding compound (no Br/Sb).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN (Pin 1) | Input voltage supply | Accepts 2–6V DC; requires ≥1µF ceramic bypass to GND close to pin for noise immunity and stability. |
| OUT (Pin 2) | Regulated output | Delivers fixed 1.8V; stable with 1–4.7µF ceramic capacitor (X7R/X5R, ESR 10–200mΩ) placed adjacent to pin. |
| GND (Pin 3) | Ground reference | Common return path for IN and OUT; must connect to low-impedance ground plane to maintain PSRR and transient response. |
Key Features
| Feature | Design Value |
|---|---|
| No minimum load requirement | Stable regulation at 0mA output - eliminates need for wasteful bleed resistors in low-duty-cycle sensor nodes. |
| Ultra-fast transient response | Sub-100µs recovery from 0→150mA load steps - meets GSM/TDMA baseband dynamic supply demands without voltage droop. |
| Low-ESR capacitor compatibility | Stable with 1µF ceramic (X7R/X5R) - reduces BOM cost and PCB area vs. larger tantalum or polymer caps. |
| Integrated fault protection | Auto-recovering thermal shutdown (140°C trip, 125°C release) plus current limit and short-circuit clamp - prevents field failures in sealed enclosures. |
| Wide input range | Operates from 2V to 6V - supports single-cell Li-ion (3.0–4.2V), two-cell alkaline (2.0–3.2V), and USB-powered (5V) systems. |
Applications
| Portable Medical Sensors | GSM Baseband Power |
|---|---|
|
Use Scenario: Wearable pulse oximeter operating on coin-cell battery with intermittent 150ms measurement bursts. IC Role / Device Role / Timing Role: Primary 1.8V supply for ADC and microcontroller core, enabling >1-year battery life via ultra-low IQ. Use Value: 65µA quiescent current and 80µs startup allow immediate sampling upon wake-up, minimizing active time and maximizing standby duration. |
Use Scenario: TDMA-based GSM handset baseband IC requiring rapid 0→150mA load transitions every 4.615ms during transmit slots. IC Role / Device Role / Timing Role: Local 1.8V LDO delivering clean, glitch-free power synchronized to RF transmit timing. Use Value: Fast transient response and small voltage deviation (<±30mV) prevent digital logic errors and RF modulation distortion during burst loading. |
| Industrial Wireless Node | USB-Powered Peripheral |
|
Use Scenario: LoRaWAN end-node in factory environment powered by 2xAA batteries, transmitting sensor data every 5 minutes. IC Role / Device Role / Timing Role: Main 1.8V rail for MCU, transceiver, and analog front-end during brief 100ms active window. Use Value: 150mV dropout extends operational voltage range down to 1.95V, extracting maximum energy from aging alkaline cells. |
Use Scenario: USB 2.0-connected barcode scanner with internal 1.8V logic requiring stable supply despite USB port voltage variation (4.75–5.25V). IC Role / Device Role / Timing Role: Post-regulator converting noisy 5V USB input to clean 1.8V for image sensor interface and controller I/O. Use Value: 65dB PSRR at 100Hz attenuates USB switcher ripple and host noise, preventing image artifacts and communication errors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-IQ, fixed-output LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-1802E/TT (Microchip) | 150mA, 1.8V, 1.6µA IQ (lower), but 600mV dropout at 150mA (higher); SOT23-3 pinout identical. | Better for ultra-long-life coin-cell apps; less suitable for low-input-voltage (e.g., 2.0V) operation due to higher dropout. | Select when IQ < 2µA is critical and input ≥2.4V; avoid if VIN may dip below 2.4V. |
| TPS70618DRVR (TI) | 150mA, 1.8V, 1.8µA IQ, 220mV dropout at 150mA; includes enable pin; SOT23-5 package (different pin count). | Enables sequencing control and system-level power management; requires PCB redesign for 5-pin layout. | Select when system-level enable control or lower IQ is required; not drop-in compatible due to pin count and footprint. |
Compared with MCP1700T-1802E/TT and TPS70618DRVR, the AP7313-18SAG-7 offers optimal balance of ultra-low dropout (150mV), moderate IQ (65µA), and 3-pin SOT23 simplicity - ideal for space-constrained, battery-voltage-sensitive designs where enable functionality is unnecessary.
Availability
AP7313-18SAG-7 is available at Aetrix Electronics and suitable for portable medical sensors, GSM baseband power, industrial wireless nodes, and USB-powered peripherals requiring stable component supply with guaranteed long-term sourcing.
Supply support for AP7313-18SAG-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 extended runtime, fast transient response, and minimal board space.
FAQ
Is AP7313-18SAG-7 stable with a 1µF ceramic output capacitor?
Yes - the AP7313-18SAG-7 is explicitly characterized and guaranteed stable with 1µF X7R or X5R ceramic capacitors (ESR 10–200mΩ). This eliminates need for larger or higher-ESR types, reducing cost and PCB area while maintaining fast transient response and low output noise.
What is the maximum input voltage for continuous operation?
The absolute maximum input voltage is 7V, but the recommended operating range is 2V to 6V per datasheet specifications. Operation above 6V risks exceeding absolute maximum ratings and may trigger thermal shutdown under load due to increased power dissipation in the pass element.
Does AP7313-18SAG-7 require an input capacitor?
Yes - a minimum 1µF ceramic capacitor is required between IN and GND, placed as close as possible to the device. This decouples high-frequency noise from the input source and ensures stability during line transients; omitting it may cause oscillation or poor PSRR performance.
How does thermal shutdown behave under sustained overload?
When junction temperature reaches ~140°C, the AP7313-18SAG-7 disables output and enters thermal shutdown. It automatically recovers when temperature falls to ~125°C. Under continuous overload, this results in controlled on/off cycling - limiting average power dissipation and preventing permanent damage without external intervention.
AP7313-18SAG-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):
- 1.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- -
- 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:
- SOT-23-3
AP7313-18SAG-7 FAQ
1.How can I place an order for AP7313-18SAG-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7313-18SAG-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 AP7313-18SAG-7 reliable?
The price and inventory of AP7313-18SAG-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7313-18SAG-7 is usually 5 days.
3.What payment methods are accepted for AP7313-18SAG-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7313-18SAG-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7313-18SAG-7?
AP7313-18SAG-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7313-18SAG-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 AP7313-18SAG-7?
For technical support, including AP7313-18SAG-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7313-18SAG-7 requirements.
6.How does Aetrix verify that AP7313-18SAG-7 is sourced from the original manufacturer or authorized distributors?
All AP7313-18SAG-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 AP7313-18SAG-7 meets industry standards.
7.What is the process for return or replacement of AP7313-18SAG-7?
All AP7313-18SAG-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7313-18SAG-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 AP7313-18SAG-7 part is unused and in its original packaging.
Return procedure for AP7313-18SAG-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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