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Diodes Incorporated AP7312-1828FM-7
- Part No.:
- AP7312-1828FM-7
- Manufacturer:
- Diodes Incorporated
- Package:
- 6-UFDFN Exposed Pad
- Datasheet:
-
AP7312-1828FM-7.pdf
- Description:
- IC REG LINEAR 1.8V/2.8V 6DFN2018
- Quantity:
- Payment:
- Shipping:
Inventory:3,686
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Product details
Overview
AP7312-1828FM-7 from Diodes Incorporated is a dual-channel, 150mA low-dropout linear regulator with fixed 1.8V and 2.8V outputs, ultra-low 60μA quiescent current, 150mV dropout at full load, and independent EN1/EN2 enable control. It operates from 2V–6V input and delivers stable power to baseband processors and RF sections in portable GSM devices.
For engineers reviewing the AP7312-1828FM-7 datasheet, AP7312-1828FM-7 pinout, AP7312-1828FM-7 application, or AP7312-1828FM-7 equivalent, key selection criteria include dual-rail sequencing capability, fast 150μs startup, 65dB PSRR at 1kHz, stability with 1μF ceramic output capacitors, and thermal shutdown at 165°C.
Technical Context
The AP7312-1828FM-7 integrates two independent LDO channels sharing a common ground but featuring separate IN, EN1/EN2, and OUT1/OUT2 terminals. Each channel uses a PMOS pass element with bandgap reference and error amplifier for precision regulation.
Its functional block includes per-channel current limiting (200–300mA), short-circuit protection (60mA clamp), and thermal shutdown with 30°C hysteresis. The DFN2018-6 package provides 60°C/W θJA, enabling higher power dissipation than the SOT26 variant.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output voltages | 1.8V (OUT1) and 2.8V (OUT2), fixed, ±2% accuracy over –40°C to +85°C |
| Quiescent current | 60μA typical (both channels active), enables >1-year battery life in always-on sensor nodes |
| Dropout voltage | 150mV at 150mA (for VOUT ≥ 2.5V), supports 3.0V input to 2.8V rail with 100mV headroom |
| PSRR | 65dB at 1kHz, suppresses switching noise from adjacent DC/DC converters |
| Start-up time | 150μs typical, meets GSM TDMA burst timing requirements for rapid wake-up |
| Thermal shutdown | Triggers at 165°C junction temperature with 30°C hysteresis, prevents permanent damage during overload |
| Input voltage range | 2V to 6V, compatible with single-cell Li-ion (2.7–4.2V) and 3.3V/5V system rails |
Pinout & Package
AP7312-1828FM-7 is housed in a 2.0mm × 1.8mm × 0.6mm DFN2018-6 package with exposed thermal pad. Pin 4 is GND; pins 1 (IN), 2 (EN1), and 3 (EN2) are inputs; pins 5 (OUT2) and 6 (OUT1) are regulated outputs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN (Pin 1) | Main power input | Accepts 2–6V; requires ≥1μF ceramic bypass capacitor placed adjacent to pin |
| EN1 (Pin 2) | Channel 1 enable | Active-high logic; drives OUT1; VIH = 1.4V min ensures compatibility with 1.8V GPIO |
| EN2 (Pin 3) | Channel 2 enable | Active-high logic; drives OUT2; independent sequencing allows staggered power-up of core/peripheral rails |
| GND (Pin 4) | Power and signal reference | Common return for both regulators; must connect to low-impedance ground plane under thermal pad |
| OUT2 (Pin 5) | 2.8V regulated output | Supplies RF transceiver or analog front-end; stable with 1μF ceramic capacitor (ESR ≥10mΩ) |
| OUT1 (Pin 6) | 1.8V regulated output | Supplies digital baseband or MCU core; exhibits <10mV undershoot during 100mA load step |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent enable control | EN1 and EN2 allow precise power sequencing-e.g., enable 1.8V core before 2.8V RF section to prevent latch-up |
| Fast transient response | Maintains <20mV output deviation during 10mA→100mA load steps at both outputs, critical for GSM burst-mode operation |
| Low-ESR capacitor support | Stable with 1μF ceramic output caps (≥10mΩ ESR), eliminating need for costly tantalum or polymer alternatives |
| Integrated protection suite | Combines current limit (300mA), short-circuit clamp (60mA), and thermal shutdown (165°C) without external components |
| Ultra-low IQ operation | 60μA total quiescent current extends shelf life in battery-backed IoT sensors and wearables |
Applications
| Cellular Baseband Power | GSM RF Transceiver Supply |
|---|---|
Use Scenario: Powering ARM9-based baseband processor in 2G/2.5G handsets with TDMA burst timing. IC Role / Device Role / Timing Role: Dual-rail LDO delivering 1.8V core and 2.8V I/O rails with independent enable for controlled boot sequence. Use Value: 150μs startup and fast load transient response ensure clean voltage during 577μs GSM transmit bursts without brownout. | Use Scenario: Supplying PA driver and RF synthesizer in Bluetooth headset with single-cell Li-ion battery. IC Role / Device Role / Timing Role: Regulating 2.8V RF rail while 1.8V rail powers digital controller; EN2 enables RF only during active link. Use Value: 60μA quiescent current minimizes standby drain; 65dB PSRR isolates RF section from noisy digital supply. |
| Portable Media Player Core | Low-Power Sensor Hub |
Use Scenario: Providing clean 1.8V for NAND flash interface and 2.8V for audio DAC in MP3 player. IC Role / Device Role / Timing Role: Dual-output LDO replacing discrete regulators to reduce BOM count and PCB area. Use Value: 150mV dropout enables full 1.8V/2.8V output even at end-of-life battery voltage (≈3.0V). | Use Scenario: Powering MEMS accelerometer, BLE SoC, and EEPROM in industrial wireless node. IC Role / Device Role / Timing Role: Always-on 1.8V rail for sensor logic; 2.8V rail enabled only during BLE transmission via EN2. Use Value: Independent enable pins cut system-wide quiescent current by 50% during sleep mode. |
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-1828FM-7 | Successor device with same pinout; 45μA IQ, improved PSRR (70dB @1kHz), lower dropout (120mV @150mA) | Direct drop-in replacement; recommended for new designs per Diodes' notice | Select when designing new products requiring extended battery life and tighter noise immunity |
| MCP1826S-1828KE/DB | Microchip dual LDO; 85μA IQ, 200mV dropout, no independent EN pins (single EN controls both channels) | Lacks per-rail enable control; unsuitable for sequenced power-up or dynamic rail gating | Choose only if board space permits larger SOT-23-6 package and independent enable is not required |
Compared with AP7312-1828FM-7, the AP7345D offers measurable gains in efficiency and noise rejection while maintaining pin compatibility, whereas the MCP1826S sacrifices sequencing flexibility for marginally higher output current (250mA/channel) and wider input range (2.3–16V).
Availability
AP7312-1828FM-7 is available at Aetrix Electronics and suitable for cellular handset design, portable media player development, and low-power sensor hub integration requiring stable component supply across production lifecycles.
Supply support for AP7312-1828FM-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 consumer, computing, communications, industrial, and automotive markets.
The AP7312 belongs to Diodes' high-efficiency LDO portfolio designed specifically for battery-powered portable electronics where ultra-low IQ, fast transient response, and dual-rail flexibility are essential.
FAQ
What is the maximum allowable input voltage for AP7312-1828FM-7?
The absolute maximum input voltage is 6.5V, but the recommended operating range is 2V to 6V. Exceeding 6V risks permanent damage due to internal ESD structure limits. For long-term reliability at elevated temperatures, keep VIN ≤ 5.5V to maintain safe junction temperature margins within the DFN2018-6 package's 60°C/W thermal resistance.
Can AP7312-1828FM-7 operate with zero load current on either output?
Yes-the AP7312-1828FM-7 remains stable and regulated with no load on either channel. Its architecture requires no minimum load, unlike older LDOs that demand 1–5mA dummy loads. This feature reduces system-level standby power and eliminates need for external bleed resistors on unused rails.
How does the thermal shutdown behave during sustained overload?
When junction temperature reaches 165°C, the device disables both outputs and enters thermal shutdown. Output resumes automatically once junction cools to ≈135°C due to 30°C hysteresis. Under continuous overload, this causes on/off cycling-visible as periodic voltage collapse-which protects against irreversible die damage but indicates inadequate heatsinking or excessive power dissipation.
Is the DFN2018-6 package RoHS-compliant and lead-free?
Yes-AP7312-1828FM-7 uses a lead-free finish and complies with EU Directive 2002/95/EC (RoHS). The molding compound is "Green" (halogen-free, no Br or Sb), and the device meets all applicable RoHS exemptions per Diodes' documentation. Full compliance data is available in the manufacturer's lead-free product summary.
AP7312-1828FM-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):
- 1.8V, 2.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.3V @ 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
AP7312-1828FM-7 FAQ
1.How can I place an order for AP7312-1828FM-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7312-1828FM-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 AP7312-1828FM-7 reliable?
The price and inventory of AP7312-1828FM-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7312-1828FM-7 is usually 5 days.
3.What payment methods are accepted for AP7312-1828FM-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7312-1828FM-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7312-1828FM-7?
AP7312-1828FM-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7312-1828FM-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 AP7312-1828FM-7?
For technical support, including AP7312-1828FM-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7312-1828FM-7 requirements.
6.How does Aetrix verify that AP7312-1828FM-7 is sourced from the original manufacturer or authorized distributors?
All AP7312-1828FM-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 AP7312-1828FM-7 meets industry standards.
7.What is the process for return or replacement of AP7312-1828FM-7?
All AP7312-1828FM-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7312-1828FM-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 AP7312-1828FM-7 part is unused and in its original packaging.
Return procedure for AP7312-1828FM-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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