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Diodes Incorporated AP7312-1218FM-7
- Part No.:
- AP7312-1218FM-7
- Manufacturer:
- Diodes Incorporated
- Package:
- 6-UFDFN Exposed Pad
- Datasheet:
-
AP7312-1218FM-7.pdf
- Description:
- IC REG LINEAR 1.2V/1.8V 6DFN2018
- Quantity:
- Payment:
- Shipping:
Inventory:1,086
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Product details
Overview
AP7312-1218FM-7 from Diodes Incorporated is a dual-channel, fixed-output low-dropout linear regulator delivering 150mA per channel with independent enable control (EN1/EN2), 1.2V and 1.8V outputs, 60μA quiescent current, and 150mV dropout at full load - designed for power rail separation in portable baseband and RF subsystems.
For engineers reviewing the AP7312-1218FM-7 datasheet, AP7312-1218FM-7 pinout, AP7312-1218FM-7 application, or AP7312-1218FM-7 equivalent, key selection criteria include dual independent enable timing, fast 150μs startup, ±2% output accuracy across –40°C to +85°C, stability with 1μF ceramic capacitors, and thermal shutdown at 165°C.
Technical Context
The AP7312 integrates two independent LDO channels sharing input and ground but featuring separate EN pins and output paths, each with dedicated pass transistors, error amplifiers, bandgap references, and protection circuitry (current limit, short-circuit, thermal shutdown). No internal feedback resistors are used - output voltages are factory-trimmed for fixed 1.2V/1.8V operation.
Each channel operates over 2V–6V input range, maintains regulation down to 150mV dropout (at 150mA, VOUT ≥ 2.5V), achieves 65dB PSRR at 1kHz, and delivers fast transient response to step-load changes up to 150mA with <20mV undershoot/overshoot when using 1μF output capacitors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.2V (Channel 1), 1.8V (Channel 2) - factory-trimmed, no external resistors required |
| Max Output Current | 150mA per channel - supports dual-core microcontrollers or RF + baseband power domains |
| Quiescent Current | 60μA (both channels active) - enables >1-year battery life in always-on sensor nodes |
| Dropout Voltage | 150mV at 150mA (VOUT ≥ 2.5V) - allows operation from single-cell Li-ion (3.0V min) with margin |
| PSRR | 65dB at 1kHz - suppresses switching noise from adjacent DC-DC converters |
| Startup Time | 150μs - meets GSM/TDMA burst-mode timing for rapid wake-up from standby |
| Thermal Shutdown | 165°C threshold with 30°C hysteresis - prevents permanent damage during sustained overload |
Pinout & Package
AP7312-1218FM-7 uses the DFN2018-6 package (2.0mm × 1.8mm × 0.6mm, wettable flank), thermally enhanced with exposed pad connected to GND. Pin mapping is validated per Diodes DS35133 Rev. 4.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN (Pin 1) | Main power input | Accepts 2V–6V; requires ≥1μF ceramic capacitor placed adjacent to pin for noise suppression |
| EN1 (Pin 2) | Channel 1 enable input | Active-high logic; drives Channel 1 (1.2V) ON/OFF independently; VIH = 1.4V min |
| EN2 (Pin 3) | Channel 2 enable input | Active-high logic; drives Channel 2 (1.8V) ON/OFF independently; VIH = 1.4V min |
| GND (Pin 4) | Power and signal reference | Common return path for both regulators and thermal pad; must be low-impedance plane |
| OUT1 (Pin 6) | 1.2V regulated output | Delivers up to 150mA; bypassed with 1μF ceramic capacitor directly to GND |
| OUT2 (Pin 5) | 1.8V regulated output | Delivers up to 150mA; bypassed with 1μF ceramic capacitor directly to GND |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent enable control | EN1/EN2 allow staggered power-up sequencing for FPGA I/O banks or multi-rail SoCs |
| Stable with 1μF ceramic output caps | Eliminates need for large tantalum or aluminum electrolytics - reduces board area and cost |
| Fast load transient response | Sub-100μs recovery from 10mA ↔ 150mA steps - sustains voltage integrity for DSP bursts |
| Low EMI operation | No switching noise; 65dB PSRR at 1kHz minimizes coupling into sensitive RF receivers |
| Robust fault protection | Current limit (~300mA), short-circuit clamp (~60mA), and thermal shutdown prevent field failures |
Applications
| Cellular Baseband Power | GSM RF Transceiver Supply |
|---|---|
Use Scenario: Dual-rail power for 2G/3G baseband processors requiring isolated 1.2V core and 1.8V I/O rails. IC Role / Device Role / Timing Role: Dual LDO providing independent, low-noise, sequenced voltage domains with fast enable timing aligned to modem sleep/wake cycles. Use Value: Enables 12.5% TDMA duty-cycle power savings via synchronized channel shutdown without cross-rail interference. | Use Scenario: Clean, low-noise 1.8V supply for GSM PA driver stages and RF synthesizer VCOs. IC Role / Device Role / Timing Role: Low-PSRR, low-dropout regulator decoupling RF section from noisy digital supply rails. Use Value: 65dB PSRR at 1kHz suppresses DC-DC ripple, reducing phase noise and improving EVM by >3dB. |
| Portable Audio Codec Bias | Wearable Sensor Hub Core |
Use Scenario: Dedicated 1.2V analog bias and 1.8V digital interface supply for stereo audio codecs in Bluetooth headsets. IC Role / Device Role / Timing Role: Dual LDO delivering quiet analog rail and glitch-free digital rail with independent enable for codec power gating. Use Value: 60μA quiescent current extends battery runtime beyond 20 hours; fast 150μs startup eliminates audio pop on resume. | Use Scenario: Powering ultra-low-power MCU core (1.2V) and integrated BLE radio (1.8V) in fitness trackers. IC Role / Device Role / Timing Role: Dual-output regulator enabling independent sleep-state control of processing and wireless subsystems. Use Value: Independent EN pins reduce system standby current to <1μA by disabling unused channels - critical for multi-week battery life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP7345D-1218FM-7 | Successor device: same pinout, 50μA IQ, 120μs startup, improved PSRR (70dB @ 1kHz) | Drop-in replacement with enhanced efficiency and transient performance; recommended for new designs | Select for new designs requiring longer battery life and tighter noise margins |
| MCP1826S-1201802 | Microchip dual LDO: 250mA/ch, 85μA IQ, 200mV dropout, SOT-23-6 package | Higher current capability but larger dropout and slower transient response; no thermal hysteresis spec | Choose only if 250mA/channel is required and board space permits SOT-23-6 footprint |
Compared with AP7312-1218FM-7, the AP7345D offers lower quiescent current and faster startup while maintaining pin compatibility, whereas the MCP1826S trades off noise performance and thermal robustness for higher current - making AP7312 optimal for legacy space-constrained, low-noise portable designs where lifecycle continuity is prioritized.
Availability
AP7312-1218FM-7 is available at Aetrix Electronics and suitable for cellular baseband power, GSM RF transceiver supply, portable audio codec bias, and wearable sensor hub core applications requiring stable component supply across extended production lifecycles.
Supply support for AP7312-1218FM-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 consumer, industrial, and automotive markets.
The AP7312 belongs to Diodes' low-quiescent-current LDO portfolio, engineered specifically for battery-powered portable electronics requiring dual-rail sequencing, fast transient response, and long operational life under variable load conditions.
FAQ
What is the thermal shutdown behavior of AP7312-1218FM-7?
The device disables output when junction temperature reaches 165°C and re-enables at ~135°C due to 30°C hysteresis. This cycling protects against permanent damage during sustained overload or poor PCB thermal design. Thermal resistance θJA is 60°C/W for DFN2018-6 on a 2-layer FR-4 board with recommended copper layout.
Can AP7312-1218FM-7 operate with input voltage below 2.0V?
No - the absolute minimum input voltage is 2.0V per datasheet Recommended Operating Conditions. Below this, regulation is not guaranteed; dropout voltage increases nonlinearly, and internal bandgap reference may become unstable. For sub-2V operation, consider alternative architectures like buck-boost regulators.
Is the 1.2V/1.8V output combination available in SOT26 package?
Yes - AP7312-1218W6-7 is the SOT26 variant with identical 1.2V/1.8V outputs. It shares all electrical specifications but has different pinout (IN/EN1/EN2/OUT1/GND/OUT2) and higher θJA (140°C/W), requiring more careful thermal design than the DFN2018-6 version.
Does AP7312-1218FM-7 require minimum load current for stability?
No - the device remains stable and regulated at zero load. Diodes explicitly states "no minimum load is required" in the Application Note. Stability is ensured with ≥1μF ceramic output capacitors and ESR ≥10mΩ; adding load does not affect loop stability.
AP7312-1218FM-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):
- 1.2V, 1.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.3V @ 150mA, 0.3V @ 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
AP7312-1218FM-7 FAQ
1.How can I place an order for AP7312-1218FM-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7312-1218FM-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 AP7312-1218FM-7 reliable?
The price and inventory of AP7312-1218FM-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7312-1218FM-7 is usually 5 days.
3.What payment methods are accepted for AP7312-1218FM-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7312-1218FM-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7312-1218FM-7?
AP7312-1218FM-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7312-1218FM-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 AP7312-1218FM-7?
For technical support, including AP7312-1218FM-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7312-1218FM-7 requirements.
6.How does Aetrix verify that AP7312-1218FM-7 is sourced from the original manufacturer or authorized distributors?
All AP7312-1218FM-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 AP7312-1218FM-7 meets industry standards.
7.What is the process for return or replacement of AP7312-1218FM-7?
All AP7312-1218FM-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7312-1218FM-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 AP7312-1218FM-7 part is unused and in its original packaging.
Return procedure for AP7312-1218FM-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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