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Diodes Incorporated AP7315-135W5-7
- Part No.:
- AP7315-135W5-7
- Manufacturer:
- Diodes Incorporated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AP7315-135W5-7.pdf
- Description:
- IC REG LINEAR 1.35V 150MA SOT25
- Quantity:
- Payment:
- Shipping:
Inventory:4,891
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Product details
Overview
AP7315-135W5-7 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 RF supply rails in compact portable devices.
For engineers reviewing the AP7315-135W5-7 datasheet, AP7315-135W5-7 pinout, AP7315-135W5-7 application, or AP7315-135W5-7 equivalent, this page delivers verified electrical specs, SOT25 package layout, real-world load transient behavior, thermal design guidance, and validated alternative LDOs for low-noise power delivery in space-constrained designs.
Technical Context
The AP7315-135W5-7 uses a CMOS-based architecture with integrated voltage reference, error amplifier, and current-limit circuitry. Its EN pin provides precise on/off control with 0.5V max logic-low threshold and 1.3V min logic-high threshold, enabling low-power shutdown states.
It achieves stable regulation under dynamic loads up to 150mA with dropout as low as 0.50V at 1.35V output and supports ceramic output capacitors ≥0.47µF. The device exhibits ±30ppm/°C output voltage temperature coefficient and maintains 75dB ripple rejection across 1kHz while delivering ultra-low 60µVrms noise.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.35V ±1% - ensures stable biasing for low-voltage RF ICs without external feedback network. |
| Max Output Current | 150mA - sufficient for powering baseband processors, RF transceivers, or sensor signal chains in handheld devices. |
| PSRR | 75dB at 1kHz - suppresses switching noise from adjacent DC-DC converters feeding noisy system rails. |
| Output Noise | 60µVrms (10Hz–100kHz) - minimizes phase noise degradation in VCOs and LNAs requiring clean analog supply. |
| Quiescent Current | 35µA typical - extends battery life in always-on subsystems like Bluetooth LE receivers or wake-on-event circuits. |
| Input Voltage Range | 1.7V to 5.25V - compatible with single-cell Li-ion (2.7–4.2V), Li-polymer, or regulated 3.3V/5V system rails. |
| Dropout Voltage | 0.50V at 150mA (1.35V VOUT) - enables operation down to ~1.85V input, preserving headroom in brownout conditions. |
Pinout & Package
SOT25 (5-pin, 2.9mm × 1.6mm × 1.1mm) package with exposed thermal pad. Requires PCB copper pour connected to GND for optimal thermal performance (θJA ≈ 200°C/W on JEDEC High-K board).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 – VIN | Power input | Accepts 1.7–5.25V; requires 0.47µF ceramic decoupling capacitor placed adjacent to pin to suppress supply glitches. |
| 2 – GND | Ground reference | Primary return path for load current and internal bias; must connect directly to low-impedance ground plane. |
| 3 – EN | Enable control | Active-high logic input; drives regulator ON when ≥1.3V, OFF when ≤0.5V; must not float-tie to VIN if unused. |
| 4 – NC | No-connect | Internally unconnected; recommended to tie to GND to maximize PCB copper area for thermal dissipation. |
| 5 – VOUT | Regulated output | Delivers 1.35V ±1% to load; requires 0.47µF ceramic capacitor placed within 2mm of pin for stability and transient response. |
Key Features
| Feature | Design Value |
|---|---|
| High PSRR | 75dB at 1kHz - rejects ripple from switching regulators, critical for RF front-end power integrity. |
| Ultra-low noise | 60µVrms (10Hz–100kHz) - avoids modulation of sensitive analog blocks like ADC references or PLL charge pumps. |
| Low quiescent current | 35µA typical - enables >1-year battery life in coin-cell-powered IoT sensors with periodic wake-up cycles. |
| Wide input range | 1.7V to 5.25V - supports direct connection to Li-ion cells or post-regulated system rails without intermediate buck stage. |
| Thermal-enhanced SOT25 | Exposed thermal pad - reduces junction-to-ambient thermal resistance by ~30% vs. standard SOT23, enabling 150mA continuous operation. |
Applications
| RF Power Amplifier Bias | Low-Power Microcontroller Core Supply |
|---|---|
|
Use Scenario: Providing clean, stable 1.35V bias to GaAs or SiGe RF power amplifiers in 4G/5G mobile modules. IC Role / Device Role / Timing Role: LDO delivers regulated VPA rail with minimal noise coupling into transmit chain. Use Value: 60µVrms noise prevents AM-to-PM distortion; 75dB PSRR isolates PA from noisy PMIC switchers. |
Use Scenario: Powering ARM Cortex-M0+ core logic in wearable health monitors operating from single-cell Li-polymer. IC Role / Device Role / Timing Role: Primary low-noise core supply enabling sub-1µA sleep current and fast wake-up from deep-sleep mode. Use Value: 35µA quiescent current extends battery runtime; ±1% accuracy maintains timing margin for 32kHz RTC oscillator. |
| CMOS Image Sensor Analog Rail | Wireless Audio Codec Reference |
|
Use Scenario: Supplying analog pixel array and column ADC in compact camera modules for smartphones and drones. IC Role / Device Role / Timing Role: Dedicated low-noise LDO for image sensor analog domain, isolated from digital switching noise. Use Value: 60µVrms noise prevents fixed-pattern noise (FPN); 0.50V dropout preserves headroom during battery discharge. |
Use Scenario: Delivering 1.35V reference voltage to stereo audio DACs and Class-D headphone amplifiers in true wireless earbuds. IC Role / Device Role / Timing Role: Precision analog supply for DAC reference and amplifier bias, minimizing THD+N in audio path. Use Value: ±1% output accuracy ensures consistent gain calibration; low PSRR prevents audible switching artifacts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-noise, enable-capable LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1801T-135I/OT | 150mA, 1.35V, ±2% accuracy, 65dB PSRR @ 1kHz, 45µA IQ, SOT23-5 | Lower PSRR and accuracy; no thermal pad; smaller footprint but higher thermal resistance | Prefer when board space is constrained and PSRR >70dB is not required; verify thermal derating at 150mA. |
| Torex XC6210B135MR-G | 150mA, 1.35V, ±1% accuracy, 70dB PSRR @ 1kHz, 55µA IQ, SOT25 | Slightly lower PSRR and higher IQ; same package and pinout; no NC pin | Drop-in replacement if 5dB PSRR margin is acceptable; confirm noise spec meets <70µVrms requirement. |
Compared with MCP1801T-135I/OT and XC6210B135MR-G, the AP7315-135W5-7 delivers superior PSRR (75dB vs. ≤70dB) and lowest noise (60µVrms), making it optimal for RF and high-fidelity analog systems where supply-induced distortion must be minimized.
Availability
AP7315-135W5-7 is available at Aetrix Electronics and suitable for RF power amplifier bias, low-power microcontroller core supply, CMOS image sensor analog rail, and wireless audio codec reference requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for AP7315-135W5-7 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-performance power management, signal integrity, and protection solutions for consumer, industrial, and automotive markets.
The AP7315 series belongs to Diodes' precision low-noise LDO product line, engineered specifically for noise-sensitive analog and RF subsystems in battery-powered portable electronics where size, efficiency, and signal purity are critical.
FAQ
What is the minimum input voltage required for stable 1.35V output at 150mA?
The AP7315-135W5-7 requires a minimum input voltage of 1.85V to maintain regulation at 150mA load, based on its maximum dropout voltage of 0.50V at that condition. Below 1.85V, output voltage will drop proportionally with input; operation below 1.7V is outside absolute maximum ratings and not guaranteed.
Can the NC pin (Pin 4) be left floating in the SOT25 package?
No-Pin 4 is internally unconnected but must be tied to GND on the PCB. This maximizes copper area for thermal dissipation and improves ground plane integrity near the regulator. Leaving it floating may degrade thermal performance and increase susceptibility to EMI coupling.
Does AP7315-135W5-7 include output discharge functionality?
No-the "-7" suffix and absence of "D" in the part number indicate the non-discharge version. When disabled via EN, the output remains high-impedance and does not actively pull VOUT to GND. For automatic discharge, select AP7315D-135W5-7, which integrates an internal 30Ω NMOS discharge path.
What is the recommended output capacitor value and type for optimal transient response?
A 0.47µF X5R/X7R ceramic capacitor placed within 2mm of the VOUT and GND pins is recommended. Larger values (e.g., 2.2µF) improve load-step response but require verification against ESR stability limits; avoid high-ESR tantalum or aluminum electrolytics unless paired with low-ESR ceramics.
AP7315-135W5-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- 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:
- Enable
- Protection Features:
- Over Current
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-25
AP7315-135W5-7 FAQ
1.How can I place an order for AP7315-135W5-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7315-135W5-7 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 AP7315-135W5-7 reliable?
The price and inventory of AP7315-135W5-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7315-135W5-7 is usually 5 days.
3.What payment methods are accepted for AP7315-135W5-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7315-135W5-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7315-135W5-7?
AP7315-135W5-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7315-135W5-7 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 AP7315-135W5-7?
For technical support, including AP7315-135W5-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7315-135W5-7 requirements.
6.How does Aetrix verify that AP7315-135W5-7 is sourced from the original manufacturer or authorized distributors?
All AP7315-135W5-7 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 AP7315-135W5-7 meets industry standards.
7.What is the process for return or replacement of AP7315-135W5-7?
All AP7315-135W5-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7315-135W5-7, 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 AP7315-135W5-7 part is unused and in its original packaging.
Return procedure for AP7315-135W5-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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