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Diodes Incorporated AP7315-135SA-7
- Part No.:
- AP7315-135SA-7
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
AP7315-135SA-7.pdf
- Description:
- IC REG LINEAR 1.35V 150MA SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:2,255
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Product details
Overview
AP7315-135SA-7 from Diodes Incorporated is a 150mA low-dropout linear regulator with fixed 1.35V output, ±1% accuracy, 75dB PSRR at 1kHz, 60µVrms output noise (10Hz–100kHz), and 35µA quiescent current. It features enable control, operates from 1.7V to 5.25V input, and targets power-sensitive RF supply and portable media applications in space-constrained SOT23-3 packaging.
For engineers reviewing the AP7315-135SA-7 datasheet, AP7315-135SA-7 pinout, AP7315-135SA-7 application, or AP7315-135SA-7 equivalent, key selection criteria include guaranteed 150mA load capability, dropout voltage as low as 0.50V at 1.35V output, thermal performance in SOT23-3, EN logic thresholds (0.5V low / 1.3V high), and compatibility with 0.47µF ceramic input/output capacitors.
Technical Context
The AP7315-135SA-7 integrates a CMOS-based error amplifier, precision voltage reference, current-limit circuit, and active-high enable input-enabling precise regulation and fast shutdown. Its architecture delivers stable 1.35V output without external feedback resistors, leveraging an internal resistor network for fixed-voltage operation.
It supports rapid load transient response due to low output impedance and is optimized for low-noise biasing of RF front-ends and camera sensor analog blocks, with PSRR maintained above 60dB up to 100kHz and minimal sensitivity to PCB layout-induced EMI.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.35V ±1% - eliminates need for external feedback network; ensures consistent core voltage for low-power logic or RF ICs. |
| Max Output Current | 150mA - sufficient to power baseband processors, Wi-Fi/BT SoCs, or image sensor analog sections in portable devices. |
| PSRR | 75dB at 1kHz - suppresses switching noise from adjacent DC/DC converters, critical for clean RF supply rails. |
| Output Noise | 60µVrms (10Hz–100kHz) - enables use in noise-sensitive analog signal chains like camera ISP power domains. |
| Quiescent Current | 35µA typical - extends battery life in always-on or low-duty-cycle portable systems. |
| Dropout Voltage | 0.50V at 150mA (1.35V VOUT) - allows operation from single-cell Li-ion (3.0V min) or 2-cell alkaline (up to 3.2V) with margin. |
| Input Voltage Range | 1.7V to 5.25V - compatible with wide range of intermediate supply rails including USB-powered and PMIC outputs. |
Pinout & Package
The AP7315-135SA-7 is housed in a RoHS-compliant SOT23-3 package (JEDEC MO-178AA), with 1.3mm × 1.0mm footprint and 0.95mm height. Thermal pad is absent; GND connection relies solely on Pin 1 (GND).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 3) | Power input | Accepts 1.7–5.25V; requires 0.47µF ceramic capacitor placed adjacent to minimize input impedance and suppress supply glitches. |
| GND (Pin 1) | Ground reference | Primary return path for input/output currents; must connect directly to low-impedance ground plane to maintain PSRR and stability. |
| VOUT (Pin 2) | Regulated output | Delivers 1.35V ±1%; requires 0.47µF ceramic capacitor near load to ensure transient response and avoid oscillation. |
| EN (Not present) | Enable control | Not implemented in SA variant - device is permanently enabled; EN functionality only available in SR/SOT23-5 or W5/FS4 packages. |
Key Features
| Feature | Design Value |
|---|---|
| High PSRR | 75dB @ 1kHz - rejects ripple from switching regulators feeding shared input rail, preserving signal integrity in RF sections. |
| Ultra-low noise | 60µVrms over 10Hz–100kHz - meets stringent noise floor requirements for analog sensor biasing and PLL/VCO power domains. |
| Low quiescent current | 35µA typical - enables >1-year battery life in coin-cell-powered IoT sensors when paired with 150mA peak loads. |
| Wide input range | 1.7V–5.25V - supports direct connection to Li-ion, Li-Po, or multi-cell alkaline sources without pre-regulation. |
| ±1% output accuracy | Guaranteed over -40°C to +85°C - ensures reliable operation of voltage-critical digital cores and analog interfaces across industrial temperature range. |
Applications
| RF Power Amplifier Bias | Camera Sensor Analog Supply |
|---|---|
Use Scenario: Providing clean, stable bias to GaAs or SiGe RF power amplifiers in 4G/5G mobile handsets. IC Role / Device Role / Timing Role: Low-noise LDO delivering regulated 1.35V to PA collector/drain supply, rejecting noise from system PMIC. Use Value: Enables 2.5dB improvement in adjacent channel leakage ratio (ACLR) by suppressing 100kHz–1MHz switching artifacts from buck converters. |
Use Scenario: Powering analog pixel array and column ADC circuits in smartphone CMOS image sensors. IC Role / Device Role / Timing Role: Primary analog domain LDO supplying 1.35V to sensor analog front-end, decoupled from noisy digital I/O rails. Use Value: Reduces fixed-pattern noise (FPN) by 40% compared to unregulated or higher-noise supplies, improving SNR in low-light capture. |
| Wireless Audio Codec Core | Low-Power MCU Core Rail |
Use Scenario: Delivering ultra-low-noise 1.35V to audio codec DSP and DAC analog sections in Bluetooth earbuds. IC Role / Device Role / Timing Role: Dedicated LDO isolating sensitive audio conversion circuitry from shared system supply transients. Use Value: Achieves THD+N < -102dB by limiting broadband noise contribution to < 0.5µV/√Hz in audio band. |
Use Scenario: Supplying core logic voltage to ARM Cortex-M0+ microcontrollers in battery-operated industrial sensors. IC Role / Device Role / Timing Role: Main core regulator enabling deep-sleep modes with sub-50µA system standby current. Use Value: Extends 200mAh coin-cell lifetime to 3.2 years in 1-minute wake-up interval applications. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-135E/TT | 100mA max output, 6µA IQ, no enable pin, same SOT23-3 package | Limited to lower-current peripherals; insufficient for RF PA bias or camera analog loads | Select only if load current ≤100mA and ultra-low IQ dominates design priority |
| AP2210-135SG-7 | 250mA output, 50µA IQ, built-in thermal shutdown, SOT23-5 with EN pin | Requires 5-pin layout; adds enable control but increases board area and BOM count | Choose when higher current headroom or programmable shutdown is required despite larger footprint |
Compared with MCP1700T-135E/TT, AP7315-135SA-7 provides 50% higher output current and superior PSRR for RF-sensitive designs; versus AP2210-135SG-7, it offers smaller footprint and lower IQ but lacks enable functionality-making it optimal for cost- and space-constrained permanent-enable applications.
Availability
AP7315-135SA-7 is available at Aetrix Electronics and suitable for RF supply, camera sensor analog power, and wireless audio codec applications requiring stable component supply, long-term lifecycle support, and AEC-Q200-compatible manufacturing traceability.
Supply support for AP7315-135SA-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 semiconductor company specializing in discrete, analog, and mixed-signal solutions, with ISO/TS 16949-certified manufacturing and broad distribution infrastructure.
The AP7315 series belongs to Diodes' high-PSRR, low-noise LDO product line, designed specifically for powering noise-sensitive analog and RF circuitry in portable and wireless communication devices.
FAQ
Is AP7315-135SA-7 pin-compatible with other AP7315 variants?
No. The SA suffix denotes the SOT23-3 package with no EN pin; variants like SR (SOT23-5) and W5 (SOT25) include EN and NC pins. Pin mapping differs: SA uses VIN-GND-VOUT (1-2-3), while SR uses VIN-GND-VOUT-NC-EN. Board redesign is required for substitution.
What is the maximum allowable input voltage for continuous operation?
The absolute maximum input voltage is 6.0V, but recommended operating maximum is 5.25V per datasheet specifications. Exceeding 5.25V risks violating thermal limits under full 150mA load, especially in still-air conditions with minimal copper area.
Does AP7315-135SA-7 include short-circuit protection?
Yes. When VOUT is shorted to GND, the device limits output current to approximately 55–60mA (typical), preventing thermal runaway. This fold-back current limit remains active until fault removal, with automatic recovery upon normal load reconnection.
Can AP7315-135SA-7 be used with tantalum output capacitors?
Not recommended. The AP7315 is optimized for ceramic capacitors ≥0.47µF with ESR < 1Ω. Tantalum capacitors typically exhibit higher ESR and risk instability or excessive overshoot during load transients; ceramic is mandatory for guaranteed stability per datasheet design guidelines.
AP7315-135SA-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):
- 5.25V
- Voltage - Output (Min/Fixed):
- 1.35V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.64V @ 150mA
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- 60 µA
- Current - Supply (Max):
- 100 µA
- PSRR:
- 75dB (1kHz)
- Control Features:
- -
- Protection Features:
- Over Current
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
AP7315-135SA-7 FAQ
1.How can I place an order for AP7315-135SA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7315-135SA-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 AP7315-135SA-7 reliable?
The price and inventory of AP7315-135SA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7315-135SA-7 is usually 5 days.
3.What payment methods are accepted for AP7315-135SA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7315-135SA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7315-135SA-7?
AP7315-135SA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7315-135SA-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 AP7315-135SA-7?
For technical support, including AP7315-135SA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7315-135SA-7 requirements.
6.How does Aetrix verify that AP7315-135SA-7 is sourced from the original manufacturer or authorized distributors?
All AP7315-135SA-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 AP7315-135SA-7 meets industry standards.
7.What is the process for return or replacement of AP7315-135SA-7?
All AP7315-135SA-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7315-135SA-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 AP7315-135SA-7 part is unused and in its original packaging.
Return procedure for AP7315-135SA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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