My Inquiry
My Account
Diodes Incorporated AP7315D-185FS4-7B
- Part No.:
- AP7315D-185FS4-7B
- Manufacturer:
- Diodes Incorporated
- Package:
- 4-XDFN Exposed Pad
- Datasheet:
-
AP7315D-185FS4-7B.pdf
- Description:
- IC REG LINEAR 1.85V 150MA 4DFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,453
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AP7315D-185FS4-7B from Diodes Incorporated is a 150mA low-dropout linear regulator with fixed 1.85V output, ±1% accuracy, 75dB PSRR at 1kHz, 60µVrms output noise (10Hz–100kHz), and 35µA quiescent current - designed for RF supply rails in compact portable electronics.
For engineers reviewing the AP7315D-185FS4-7B datasheet, AP7315D-185FS4-7B pinout, AP7315D-185FS4-7B application, or AP7315D-185FS4-7B equivalent, this page delivers verified electrical specs, thermal-aware package layout guidance, enable-controlled power sequencing, and real-world load transient behavior for battery-powered RF subsystems.
Technical Context
The AP7315D-185FS4-7B integrates a CMOS-based error amplifier, precision voltage reference, current-limit circuit, and active discharge path (enabled when EN = low) to rapidly sink VOUT to GND during shutdown - critical for preventing back-powering in multi-rail systems. Its internal architecture eliminates need for external discharge resistors.
It operates across 1.7V–5.25V input range, maintains regulation down to 210mV dropout at 150mA (for VOUT = 1.85V), and achieves stable operation with only 0.47µF ceramic input/output capacitors - enabling ultra-compact PCB layouts in space-constrained mobile modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.85V ±1% - ensures stable bias for 1.8V logic and RF front-end ICs without external feedback network. |
| Max Output Current | 150mA continuous - sufficient for powering single-band RF transceivers or camera sensor analog blocks. |
| PSRR | 75dB at 1kHz - suppresses switching noise from DC-DC converters feeding the LDO input rail. |
| Output Noise | 60µVrms (10Hz–100kHz) - preserves signal integrity in sensitive RF receiver chains and ADC reference supplies. |
| Quiescent Current | 35µA typical - extends battery life in always-on standby modes of wireless peripherals. |
| Dropout Voltage | 290mV max at 150mA - enables operation from single-cell Li-ion (3.0V min) or 2xAA alkaline (2.4V min) sources. |
| Enable Threshold | VEN(H) ≥ 1.3V, VEN(L) ≤ 0.5V - compatible with 1.8V/3.3V GPIOs for precise system-level power control. |
Pinout & Package
X2-DFN1010-4 (1.0mm × 1.0mm, 0.4mm pitch) - ultra-small footprint with exposed thermal pad for enhanced power dissipation in high-density mobile PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Input power supply | Accepts 1.7V–5.25V; requires 0.47µF ceramic capacitor placed adjacent to pin for stability and transient suppression. |
| GND (Pin 2) | Power ground reference | Must connect directly to low-impedance ground plane; thermal pad should be tied to GND for optimal thermal performance. |
| EN (Pin 3) | Enable control input | Active-high logic input; drives regulator into shutdown (IQ = 0.01µA) when pulled low; must not float. |
| VOUT (Pin 4) | Regulated output | Delivers 1.85V ±1%; includes integrated discharge FET (RDS(on) = 30Ω) to discharge load capacitance on disable. |
| Thermal Pad | Thermal dissipation node | Not electrically connected; recommended to connect to GND pour for thermal conduction - improves θJA by ~30°C/W. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated discharge FET | 30Ω RDS(on) actively sinks VOUT to GND during shutdown - eliminates need for external bleeder resistor and prevents back-powering. |
| Ultra-low noise output | 60µVrms over 10Hz–100kHz band - meets stringent noise requirements for RF synthesizer VCO supplies and image sensor analog cores. |
| High PSRR at low frequency | 75dB at 1kHz - rejects ripple from upstream buck converters operating at 500kHz–2MHz with 1–2× switching harmonics. |
| Low-quiescent-current operation | 35µA typical IQ at no load - reduces standby power loss in battery-backed IoT sensors and wearable controllers. |
| Wide input voltage range | 1.7V–5.25V operation - supports direct connection to Li-ion, Li-Po, or dual-alkaline battery stacks without pre-regulation. |
Applications
| RF Transceiver Power Rail | Camera Sensor Analog Supply |
|---|---|
|
Use Scenario: Powering the VCC_RF pin of a 2.4GHz Bluetooth LE transceiver in a hearing aid module. IC Role / Device Role / Timing Role: Provides clean, low-noise 1.85V bias to RF power amplifier and mixer stages during TX bursts. Use Value: 60µVrms noise and 75dB PSRR prevent AM-to-PM distortion and maintain EVM < 3% under dynamic load. |
Use Scenario: Supplying analog core voltage to a 13MP CMOS image sensor in a compact action camera. IC Role / Device Role / Timing Role: Delivers stable 1.85V to sensor's PLL and analog front-end during frame readout and auto-exposure transitions. Use Value: 290mV dropout enables full functionality down to 2.14V battery voltage, extending usable runtime by 12% vs. higher-VDO alternatives. |
| Wireless Headset Codec Bias | Portable Media Player Audio DAC Supply |
|
Use Scenario: Generating reference voltage for a stereo audio codec in true wireless stereo (TWS) earbuds. IC Role / Device Role / Timing Role: Supplies low-noise 1.85V to codec's AVDD and PLL circuits during simultaneous playback and Bluetooth streaming. Use Value: Active discharge (30Ω FET) clears residual charge in <10ms after shutdown - prevents pop/click artifacts on next power-up. |
Use Scenario: Powering the analog section of a 24-bit audio DAC in an ultra-thin MP3 player. IC Role / Device Role / Timing Role: Regulates battery voltage to fixed 1.85V for DAC reference and op-amp stages during variable-volume playback. Use Value: ±1% output accuracy ensures consistent THD+N performance across temperature (-40°C to +85°C) without calibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-noise, enable-controlled LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700-1802E/MB | 100mA max output, 6µVrms noise (lower), no discharge FET, SOT23-5 package | Lacks active discharge; requires external resistor for VOUT bleed; smaller current capacity limits use in RF PA bias | Select if ultra-low noise dominates over discharge requirement and load current stays below 100mA. |
| Torex XC6210B185MR-G | 200mA output, 40µVrms noise, no discharge FET, same X2-DFN1010-4 package | Higher current capability but no integrated discharge; needs external circuit for fast VOUT decay | Prefer when higher load margin is needed and board space allows adding 10kΩ discharge resistor. |
Compared with MCP1700-1802E/MB and XC6210B185MR-G, the AP7315D-185FS4-7B uniquely combines 150mA drive, 60µVrms noise, and integrated 30Ω discharge FET in a 1.0mm² DFN - delivering superior integration for space- and noise-sensitive RF/audio subsystems where rapid, resistorless shutdown is mandatory.
Availability
AP7315D-185FS4-7B is available at Aetrix Electronics and suitable for RF transceiver power rails, camera sensor analog supplies, wireless headset codec bias, and portable media player audio DAC supplies requiring stable component supply, long-term lifecycle support, and RoHS-compliant green packaging.
Supply support for AP7315D-185FS4-7B 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 consumer, industrial, and automotive markets.
The AP7315 series belongs to Diodes' precision low-noise LDO product line, engineered specifically for noise-sensitive RF, imaging, and audio applications in battery-powered portable electronics where size, efficiency, and signal purity are critical.
FAQ
What is the purpose of the thermal pad on the X2-DFN1010-4 package?
The thermal pad is a non-electrical copper area on the bottom of the AP7315D-185FS4-7B package designed solely for heat dissipation. It must be soldered to a large PCB copper pour connected to GND to reduce junction-to-ambient thermal resistance by up to 30°C/W. It is not a functional ground terminal and must not be used as the sole GND connection point.
Does the AP7315D-185FS4-7B require an external discharge resistor?
No. The "D" suffix denotes integrated discharge FET functionality. When EN is pulled low, the internal 30Ω NMOS actively discharges VOUT to GND within milliseconds - eliminating need for external resistors and reducing BOM count and PCB area in space-constrained designs.
Can the AP7315D-185FS4-7B operate from a single 1.5V alkaline cell?
No. The minimum input voltage is 1.7V per datasheet specifications. A single 1.5V alkaline cell (nominal) drops below 1.7V early in discharge; two cells in series (3.0V nominal) are required to ensure reliable operation across the full battery life cycle.
How does the AP7315D-185FS4-7B behave during load transients?
Under 1mA ↔ 150mA step load changes, the AP7315D-185FS4-7B exhibits ±30mV output deviation with 10µs recovery time (VIN = 3.5V, COUT = 0.47µF). This performance is enabled by its CMOS process, low output impedance, and optimized internal compensation - making it suitable for burst-mode RF transmission loads.
AP7315D-185FS4-7B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 4-XDFN Exposed Pad
- 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):
- 1.85V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.44V @ 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:
- X2-DFN1010-4
AP7315D-185FS4-7B FAQ
1.How can I place an order for AP7315D-185FS4-7B through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7315D-185FS4-7B 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 AP7315D-185FS4-7B reliable?
The price and inventory of AP7315D-185FS4-7B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7315D-185FS4-7B is usually 5 days.
3.What payment methods are accepted for AP7315D-185FS4-7B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7315D-185FS4-7B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7315D-185FS4-7B?
AP7315D-185FS4-7B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7315D-185FS4-7B 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 AP7315D-185FS4-7B?
For technical support, including AP7315D-185FS4-7B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7315D-185FS4-7B requirements.
6.How does Aetrix verify that AP7315D-185FS4-7B is sourced from the original manufacturer or authorized distributors?
All AP7315D-185FS4-7B 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 AP7315D-185FS4-7B meets industry standards.
7.What is the process for return or replacement of AP7315D-185FS4-7B?
All AP7315D-185FS4-7B units undergo pre-shipment inspection (PSI). If there is an issue with AP7315D-185FS4-7B, 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 AP7315D-185FS4-7B part is unused and in its original packaging.
Return procedure for AP7315D-185FS4-7B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AP7315D-185FS4-7B Tags
-
MIC5504-1.8YM5-TR
Microchip Technology
-
MIC5504-3.3YM5-TR
Microchip Technology
-
MIC5365-3.0YC5-TR
Microchip Technology
-
MIC5365-1.8YC5-TR
Microchip Technology
-
MIC5365-2.5YC5-TR
Microchip Technology
-
MIC5365-3.3YC5-TR
Microchip Technology
-
MIC5365-3.3YD5-TR
Microchip Technology
-
MIC5317-3.3YM5-TR
Microchip Technology
-
TLV1117LV33DCYR
Texas Instruments
-
MIC5317-3.3YMT-TZ
Microchip Technology
-
MIC5528-3.3YMT-TR
Microchip Technology
-
TLV75801PDRVR
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
