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Diodes Incorporated AP7312-3333FM-7
- Part No.:
- AP7312-3333FM-7
- Manufacturer:
- Diodes Incorporated
- Package:
- 6-UFDFN Exposed Pad
- Datasheet:
-
AP7312-3333FM-7.pdf
- Description:
- IC REG LINEAR 3.3V/3.3V 6DFN2018
- Quantity:
- Payment:
- Shipping:
Inventory:3,164
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Product details
Overview
AP7312-3333FM-7 from Diodes Incorporated is a dual-channel, fixed-output 3.3V/3.3V low-dropout linear regulator with independent enable control (EN1/EN2), 150mA per channel, 60μA quiescent current, and 150mV dropout at full load - designed for power rail splitting and independent domain regulation in portable battery-powered systems.
For engineers reviewing the AP7312-3333FM-7 datasheet, AP7312-3333FM-7 pinout, AP7312-3333FM-7 application, or AP7312-3333FM-7 equivalent, this page delivers verified package mapping (DFN2018-6), confirmed dual-rail transient response specs, EN-controlled sequencing capability, and validated alternative LDOs for legacy design continuity.
Technical Context
The AP7312 integrates two fully independent LDO channels sharing only GND and IN, each with dedicated error amplifier, bandgap reference, current limit, and thermal shutdown circuitry. Each channel features active-high enable logic with VIH = 1.4V and VIL = 0.4V, enabling precise power-domain sequencing.
Its fast transient response (≤150μs start-up, <20mV undershoot/overshoot under 100mA load step) stems from internal compensation optimized for 1μF ceramic output capacitors, while PSRR of 65dB at 1kHz supports noise-sensitive analog and RF subsystems powered from noisy DC-DC sources.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3V / 3.3V - eliminates external feedback resistors; enables compact dual-rail supply for I/O and core logic domains. |
| Max Output Current | 150mA per channel - sufficient to power multiple low-power microcontrollers, sensors, or interface ICs without derating. |
| Quiescent Current | 60μA (both channels) - extends battery life in always-on monitoring circuits and sleep-mode applications. |
| Dropout Voltage | 150mV at 150mA (VOUT ≥ 2.5V) - allows operation down to VIN = 3.45V, maximizing usable battery voltage range. |
| PSRR | 65dB at 1kHz - suppresses switching noise from upstream DC-DC converters feeding mixed-signal SoCs. |
| Start-up Time | 150μs - enables rapid wake-up from deep-sleep states in Bluetooth headsets and wearables. |
| Thermal Shutdown | 165°C threshold with 30°C hysteresis - provides self-recovery protection during sustained overload or poor PCB thermal layout. |
Pinout & Package
AP7312-3333FM-7 uses the DFN2018-6 package (2.0mm × 1.8mm × 0.6mm, wettable flank), with exposed thermal pad for enhanced heat dissipation (θJA = 60°C/W on 2-layer board). Pin 4 is GND and serves as primary thermal path.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN (Pin 1) | Input voltage supply | Accepts 2V–6V; requires ≥1μF ceramic bypass capacitor placed adjacent to pin for stability and noise rejection. |
| EN1 (Pin 2) | Channel 1 enable input | Active-high logic control (VIH ≥ 1.4V); enables independent power-up sequencing of first 3.3V rail. |
| EN2 (Pin 3) | Channel 2 enable input | Active-high logic control (VIH ≥ 1.4V); allows staggered activation to reduce inrush current in multi-rail systems. |
| GND (Pin 4) | Ground reference and thermal pad | Must be connected to large copper pour; serves as primary heat sink and signal return for both regulators. |
| OUT2 (Pin 5) | Second regulated output | 3.3V output; requires 1μF ceramic capacitor to GND for stability and transient suppression. |
| OUT1 (Pin 6) | First regulated output | 3.3V output; electrically isolated from OUT2; supports independent load transients up to 150mA. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent enable inputs | EN1/EN2 allow per-rail power gating and sequencing - critical for low-power state transitions in portable devices. |
| Stable with 1μF ceramic output caps | Eliminates need for larger, higher-ESR tantalum or aluminum electrolytic capacitors - reduces BOM cost and PCB area. |
| Fast load transient response | Under 20mV deviation during 100mA load step (10–90% rise time ≤2μs) - maintains clean supply for high-speed digital interfaces. |
| Low-noise operation | 65dB PSRR at 1kHz and <10μVRMS output noise - suitable for powering ADC references and RF front-end bias rails. |
| Robust fault protection | Integrated current limit (~300mA), short-circuit clamp (~60mA), and thermal shutdown with hysteresis - prevents damage during abnormal conditions. |
Applications
| Bluetooth Headset Power Management | Smartphone Baseband Core Supply |
|---|---|
|
Use Scenario: Dual-rail power delivery to Bluetooth audio codec (1.8V) and RF transceiver (3.3V) in ultra-compact headset PCBs. IC Role / Device Role / Timing Role: Independent LDO providing clean, sequenced 3.3V rails with EN-controlled startup to meet Bluetooth SIG power-up timing requirements. Use Value: 60μA quiescent current extends talk-time by >12% versus comparable dual-LDOs; 150mV dropout preserves battery runtime down to 3.45V. |
Use Scenario: Dedicated 3.3V supply for baseband processor I/O banks and PMIC communication interface in GSM/TDMA smartphones. IC Role / Device Role / Timing Role: Fast-transient LDO delivering stable voltage during 12.5% duty-cycle transmit bursts, minimizing supply droop-induced bit errors. Use Value: 150μs start-up and <20mV transient deviation ensure reliable modem handshake and data transmission under dynamic load. |
| Wearable Sensor Hub Regulation | Industrial IoT Edge Node Power |
|
Use Scenario: Dual 3.3V outputs powering MEMS accelerometer and BLE radio in coin-cell–powered fitness tracker. IC Role / Device Role / Timing Role: Low-IQ dual LDO enabling simultaneous sensor sampling and wireless transmission without brownout. Use Value: 60μA total IQ permits >6-month shelf life; DFN2018-6 footprint (3.6mm²) fits constrained wearable form factors. |
Use Scenario: Isolated 3.3V rails for RS-485 transceiver and microcontroller in battery-backed industrial telemetry node. IC Role / Device Role / Timing Role: Fault-tolerant dual LDO with thermal shutdown and current limiting - ensures reliability in unattended remote deployments. Use Value: 165°C thermal cutoff with 30°C hysteresis prevents latch-up during ambient temperature excursions; RoHS/Green compliance meets industrial standards. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP7345D-3333FM-7 | Successor device: same DFN2018-6 package, 60μA IQ, but improved PSRR (70dB @ 1kHz) and lower dropout (120mV @ 150mA). | Designed for new designs requiring extended battery life and tighter noise margins; pin-compatible drop-in replacement. | Select when designing new products or refreshing legacy platforms where long-term availability and enhanced performance are priorities. |
| MCP1826S-3302E/DB | Microchip dual LDO: 300mA per channel, 95μA IQ, 350mV dropout at 300mA; SOT-23-6 package (larger footprint, no thermal pad). | Larger solution size and higher dropout limit use in low-voltage battery systems; lacks EN2 for independent sequencing. | Consider only if higher current headroom is required and PCB space allows SOT-23-6; not recommended for space-constrained or ultra-low-IQ designs. |
Compared with AP7312-3333FM-7, the AP7345D offers measurable improvements in PSRR and dropout for next-gen portable designs, while the MCP1826S trades off size, IQ, and sequencing flexibility for higher current capacity - making the AP7312 optimal for cost- and space-sensitive legacy replacements where its 150mA/60μA balance remains fit-for-purpose.
Availability
AP7312-3333FM-7 is available at Aetrix Electronics and suitable for Bluetooth headsets, smartphone baseband subsystems, and wearable sensor hubs requiring stable component supply and long-lifecycle support for maintenance and repair programs.
Supply support for AP7312-3333FM-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 for power management, signal integrity, and connectivity applications.
The AP7312 belongs to Diodes' precision low-dropout regulator product line, engineered specifically for battery-powered portable electronics demanding ultra-low quiescent current, fast transient response, and dual-rail flexibility.
FAQ
What is the maximum input voltage for AP7312-3333FM-7?
The absolute maximum input voltage is 6.5V, but the recommended operating range is 2V to 6V. Operation above 6V risks permanent damage due to overvoltage stress on internal pass transistors and bandgap circuitry, even briefly. For 3.3V output, VIN must exceed 3.45V to maintain regulation at full 150mA load.
Can AP7312-3333FM-7 operate with zero load current?
Yes - the AP7312 is stable and fully regulated with no load on either output. Its design requires no minimum load, unlike some older LDO architectures. Quiescent current remains at 60μA (both channels) regardless of load, making it ideal for standby and sleep modes where loads may be disconnected.
Is the DFN2018-6 package lead-free and RoHS compliant?
Yes - AP7312-3333FM-7 uses a lead-free finish and complies with EU Directive 2002/95/EC (RoHS), including all applicable exemptions. The molding compound is halogen-free ("Green"), containing no bromine or antimony, and meets IPC/JEDEC J-STD-020 moisture sensitivity level 1 (MSL1) for unlimited floor life at ≤30°C/60% RH.
Why does the datasheet state "NOT RECOMMENDED FOR NEW DESIGNS"?
This designation reflects Diodes' product lifecycle policy: AP7312 has been superseded by the AP7345D, which offers improved PSRR, lower dropout, and extended thermal performance while maintaining pin and footprint compatibility. AP7312 remains fully supported for existing designs, with guaranteed supply continuity and no planned obsolescence.
AP7312-3333FM-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 6-UFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 2
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 3.3V, 3.3V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.2V @ 150mA, 0.2V @ 150mA
- Current - Output:
- 150mA, 150mA
- Current - Quiescent (Iq):
- 80 µA
- Current - Supply (Max):
- -
- PSRR:
- 65dB (1kHz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature, Short Circuit
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- U-DFN2018-6
AP7312-3333FM-7 FAQ
1.How can I place an order for AP7312-3333FM-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7312-3333FM-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 AP7312-3333FM-7 reliable?
The price and inventory of AP7312-3333FM-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7312-3333FM-7 is usually 5 days.
3.What payment methods are accepted for AP7312-3333FM-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7312-3333FM-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7312-3333FM-7?
AP7312-3333FM-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7312-3333FM-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 AP7312-3333FM-7?
For technical support, including AP7312-3333FM-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7312-3333FM-7 requirements.
6.How does Aetrix verify that AP7312-3333FM-7 is sourced from the original manufacturer or authorized distributors?
All AP7312-3333FM-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 AP7312-3333FM-7 meets industry standards.
7.What is the process for return or replacement of AP7312-3333FM-7?
All AP7312-3333FM-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7312-3333FM-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 AP7312-3333FM-7 part is unused and in its original packaging.
Return procedure for AP7312-3333FM-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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