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Diodes Incorporated AP7313-18SRG-7
- Part No.:
- AP7313-18SRG-7
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
AP7313-18SRG-7.pdf
- Description:
- IC REG LIN 1.8V 150MA SOT23R-3
- Quantity:
- Payment:
- Shipping:
Inventory:11,689
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Product details
Overview
AP7313-18SRG-7 from Diodes Incorporated is a 150mA fixed-output (1.8V) low-dropout linear regulator in SOT23R package, featuring 65µA quiescent current, 150mV dropout at full load, and 65dB PSRR at 100Hz - designed for battery-powered portable devices requiring stable, ultra-low-power voltage regulation.
For engineers reviewing the AP7313-18SRG-7 datasheet, AP7313-18SRG-7 pinout, AP7313-18SRG-7 application, or AP7313-18SRG-7 equivalent, key selection criteria include input voltage range (2V–6V), fast 80µs startup, stability with 1µF ceramic output capacitor, and integrated thermal shutdown, current limit, and short-circuit protection.
Technical Context
The AP7313-18SRG-7 integrates a PMOS pass element, bandgap reference, error amplifier, and protection circuitry to deliver precise 1.8V regulation across -40°C to +85°C ambient. Its low IQ architecture maintains 65µA typical quiescent current from no-load to 150mA output.
Designed for transient-sensitive loads, it achieves fast line/load response via optimized internal compensation and supports operation with 1µF low-ESR ceramic capacitors on both input and output. Dropout voltage remains ≤300mV across full temperature and load range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8V ±2% over -40°C to +85°C - ensures stable core supply for 1.8V logic and RF ICs without external feedback. |
| Max Output Current | 150mA continuous - sufficient for microcontrollers, sensors, and low-power transceivers in compact portable designs. |
| Quiescent Current | 65µA typical at 150mA load - minimizes standby power loss in always-on battery applications like IoT endpoints. |
| 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 converters or noisy DC/DC stages feeding the LDO input. |
| Start-up Time | 80µs - allows rapid wake-up from deep sleep modes in GSM/TDMA baseband systems with burst load demands. |
| Stability | Guaranteed with ≥1µF X5R/X7R ceramic output capacitor - eliminates need for bulky tantalum or high-ESR caps, reducing board area and cost. |
Pinout & Package
AP7313-18SRG-7 is housed in a RoHS-compliant, lead-free SOT23R package (2.9mm × 1.6mm × 1.1mm), optimized for thermal performance (θJA = 230°C/W) and automated assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Top View) | GND | Ground reference for internal bandgap, error amp, and protection circuits; must be connected to low-impedance PCB ground plane. |
| 2 (Top View) | OUT | Regulated 1.8V output; requires local 1µF ceramic decoupling to GND within 3mm trace length for stability and transient response. |
| 3 (Top View) | IN | Input supply (2V–6V); bypassed with ≥1µF ceramic cap to GND adjacent to pin to suppress high-frequency noise and input transients. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 65µA at full 150mA load - extends shelf life and runtime in coin-cell–powered devices such as wearables and remote sensors. |
| Fast transient response | Controlled undershoot/overshoot during 0→150mA load steps - maintains clean supply for DSPs and GSM baseband ICs with pulsed current profiles. |
| Integrated protection | Thermal shutdown (140°C trip), current limit (~300mA), and short-circuit clamp (~50mA) - eliminates need for external fault management circuitry. |
| No minimum load requirement | Stable regulation from 0mA to 150mA - simplifies design for variable-load systems like Bluetooth LE peripherals entering sleep states. |
Applications
| Portable Medical Sensors | GSM Baseband Power |
|---|---|
|
Use Scenario: Continuous glucose monitor (CGM) using coin-cell battery and ultra-low-power MCU with intermittent RF transmission. IC Role / Device Role / Timing Role: Primary 1.8V supply for MCU core and BLE radio subsystem, enabling sub-10µA sleep current. Use Value: 65µA IQ and no-minimum-load stability extend battery life beyond 12 months; 80µs startup synchronizes with RF wake-up timing. |
Use Scenario: TDMA-based GSM handset baseband IC requiring rapid, glitch-free voltage during transmit bursts. IC Role / Device Role / Timing Role: Dedicated LDO for 1.8V digital core rail, responding to 100µA ↔ 150mA load transitions within 50µs. Use Value: Fast transient response and <100mV overshoot/undershoot prevent bit errors and reset events during high-duty-cycle RF operation. |
| Industrial IoT Edge Node | USB-Powered Peripherals |
|
Use Scenario: LoRaWAN sensor node powered by USB-charged LiPo, operating in wide ambient (-40°C to +85°C). IC Role / Device Role / Timing Role: Main 1.8V regulator for microcontroller and environmental sensor interface, surviving cold-start conditions. Use Value: 150mV dropout enables regulation down to 1.95V input - critical for maintaining operation as battery discharges below 2.0V. |
Use Scenario: USB 2.0 audio adapter drawing variable current from 5V bus while powering 1.8V DAC and codec. IC Role / Device Role / Timing Role: Post-regulator isolating sensitive analog circuitry from USB VBUS noise and load-induced dips. Use Value: 65dB PSRR at 100Hz attenuates switching noise from upstream DC/DC converter, reducing audible artifacts in audio output. |
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-1802E/TT | 150mA, 1.8V, 1.6µA IQ (lower), but 600mV dropout at 150mA - higher input headroom required. | Limited to ultra-low-IQ applications where dropout >300mV is acceptable; unsuitable for single-cell Li-ion discharge tail. | Select only if system prioritizes nanoampere standby over battery runtime extension. |
| TPS70618DRVR | 150mA, 1.8V, 900nA IQ, but 250mV dropout at 150mA and requires 2.2µF output cap - larger footprint and higher BOM cost. | Better for energy-harvesting systems with intermittent operation; less optimal for space-constrained portable designs. | Prefer when multi-year shelf life outweighs PCB area and cost constraints. |
Compared with MCP1700T-1802E/TT and TPS70618DRVR, AP7313-18SRG-7 uniquely balances ultra-low IQ (65µA), low dropout (150mV), and minimal 1µF output capacitance - making it optimal for cost-sensitive, space-limited, battery-operated devices needing full-load efficiency and rapid wake-up.
Availability
AP7313-18SRG-7 is available at Aetrix Electronics and suitable for portable medical sensors, industrial IoT edge nodes, GSM baseband power, and USB-powered peripherals requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AP7313-18SRG-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 series belongs to Diodes' low-quiescent-current LDO portfolio, engineered specifically for battery-powered portable electronics where extended runtime, fast transient response, and small solution size are critical design requirements.
FAQ
What is the minimum input voltage required for AP7313-18SRG-7 to maintain regulation?
The AP7313-18SRG-7 requires a minimum input voltage of 1.95V to sustain 1.8V output at 150mA load, based on its typical 150mV dropout voltage. At lighter loads, regulation is maintained down to VIN = VOUT + dropout (e.g., ~1.85V at 10mA), but full 150mA capability begins at 1.95V.
Can AP7313-18SRG-7 operate without an output capacitor?
No - an output capacitor is mandatory for stability. The device is specified and tested with ≥1µF X5R/X7R ceramic capacitors. Omitting the output capacitor causes oscillation and unregulated output; no-load stability is guaranteed only when the recommended capacitor is present.
Does AP7313-18SRG-7 require a specific PCB layout for thermal performance?
Yes - the SOT23R package relies on copper pad area for heat dissipation. Diodes recommends following AP02001 pad layout: 1.5mm² exposed thermal pad connected to ≥2cm² internal ground plane via ≥4 thermal vias. Without this, junction temperature may exceed 125°C at 150mA in still air.
How does the short-circuit protection behave under sustained fault conditions?
Under sustained short-circuit (VOUT < 200mV), AP7313-18SRG-7 limits output current to ~50mA and cycles into thermal shutdown if junction temperature reaches 140°C. It resumes regulation only after cooling to ~125°C - providing safe, self-limiting behavior without latch-up or damage.
AP7313-18SRG-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:
- SOT23R
AP7313-18SRG-7 FAQ
1.How can I place an order for AP7313-18SRG-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7313-18SRG-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 AP7313-18SRG-7 reliable?
The price and inventory of AP7313-18SRG-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7313-18SRG-7 is usually 5 days.
3.What payment methods are accepted for AP7313-18SRG-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7313-18SRG-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7313-18SRG-7?
AP7313-18SRG-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7313-18SRG-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 AP7313-18SRG-7?
For technical support, including AP7313-18SRG-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7313-18SRG-7 requirements.
6.How does Aetrix verify that AP7313-18SRG-7 is sourced from the original manufacturer or authorized distributors?
All AP7313-18SRG-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 AP7313-18SRG-7 meets industry standards.
7.What is the process for return or replacement of AP7313-18SRG-7?
All AP7313-18SRG-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7313-18SRG-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 AP7313-18SRG-7 part is unused and in its original packaging.
Return procedure for AP7313-18SRG-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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