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Diodes Incorporated AP7312-1233FM-7
- Part No.:
- AP7312-1233FM-7
- Manufacturer:
- Diodes Incorporated
- Package:
- 6-UFDFN Exposed Pad
- Datasheet:
-
AP7312-1233FM-7.pdf
- Description:
- IC REG LINEAR 1.2V/3.3V 6DFN2018
- Quantity:
- Payment:
- Shipping:
Inventory:7,965
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Product details
Overview
AP7312-1233FM-7 from Diodes Incorporated is a dual-channel, 150mA low-dropout linear regulator with fixed 1.2V and 3.3V outputs, independent enable pins (EN1/EN2), 60μA quiescent current, and 150mV dropout at full load - designed for power rail separation in portable baseband subsystems.
For engineers reviewing the AP7312-1233FM-7 datasheet, AP7312-1233FM-7 pinout, AP7312-1233FM-7 application, or AP7312-1233FM-7 equivalent, this device supports fast transient response in GSM/TDMA burst-mode loads, stable operation with 1μF ceramic output capacitors, and independent channel control for dynamic power sequencing in space-constrained mobile designs.
Technical Context
The AP7312 integrates two independent LDO channels sharing input and ground but featuring separate EN and OUT pins, each with dedicated pass transistors, error amplifiers, and bandgap references. Its architecture enables simultaneous or staggered activation without cross-regulation coupling.
Each channel delivers regulated output with ±2% accuracy across –40°C to +85°C ambient, maintains stability under fast 0–150mA load steps (≤100μs recovery), and achieves 65dB PSRR at 1kHz - critical for noise-sensitive RF and DSP supply domains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.2V (Channel 1) and 3.3V (Channel 2) - fixed, non-adjustable, enabling direct replacement of discrete single-LDO solutions. |
| Max Output Current | 150mA per channel - sufficient to power low-power microcontrollers, sensors, or RF front-end bias rails. |
| Quiescent Current | 60μA (both channels active) - minimizes standby power loss in battery-operated devices with extended sleep cycles. |
| Dropout Voltage | 150mV at 150mA (for VOUT ≥ 2.5V) - allows regulation from 3.45V input to 3.3V rail, maximizing battery utilization. |
| PSRR | 65dB at 1kHz - suppresses switching noise from adjacent DC-DC converters feeding shared input rails. |
| Start-up Time | 150μs - enables rapid wake-up from deep-sleep states without violating processor reset timing requirements. |
| Thermal Shutdown | Triggers at 165°C junction temperature with 30°C hysteresis - prevents permanent damage during sustained overload or poor PCB thermal design. |
Pinout & Package
AP7312-1233FM-7 is packaged in a 6-pin DFN2018-6 (2.0mm × 1.8mm, 0.5mm pitch) with exposed thermal pad. Pin 4 is GND; pin 1 is IN; pins 2 and 3 are EN1 and EN2; pins 5 and 6 are OUT1 (1.2V) and OUT2 (3.3V).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN (Pin 1) | Main power input | Accepts 2V–6V; requires ≥1μF ceramic decoupling close to pin to prevent instability from supply ripple. |
| EN1 (Pin 2) | Enable control for Channel 1 | Active-high logic input; must exceed 1.4V to activate 1.2V output; ties to IN if always-on operation required. |
| EN2 (Pin 3) | Enable control for Channel 2 | Independent activation of 3.3V rail; enables power sequencing where core logic powers before I/O peripherals. |
| GND (Pin 4) | Common reference | Shared ground return for both regulators and internal protection circuitry; connects to thermal pad for heat dissipation. |
| OUT1 (Pin 5) | 1.2V regulated output | Supplies low-voltage cores (e.g., ARM Cortex-M0+ VDDCORE); bypassed with 1μF ceramic capacitor to GND. |
| OUT2 (Pin 6) | 3.3V regulated output | Powers interface peripherals (UART, SPI, GPIO); stable with ESR ≥10mΩ and COUT ≥1μF. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent enable inputs | EN1/EN2 allow precise sequencing of 1.2V and 3.3V rails - essential for SoC power-up order compliance (e.g., core before I/O). |
| Stable with 1μF ceramic output caps | Eliminates need for larger, higher-ESR tantalum capacitors - reduces board area and cost while improving reliability. |
| Fast load transient response | Recovers within 100μs from 0–150mA step - maintains voltage integrity during GSM TDMA transmit bursts without external compensation. |
| Integrated protection suite | Current limit (300mA), short-circuit clamp (60mA), and thermal shutdown (165°C) operate autonomously without external components. |
| Low-noise operation | 65dB PSRR at 1kHz and <10mVpp output ripple under dynamic load - suitable for analog sensor and RF bias supplies. |
Applications
| Cellular Baseband Power | Wearable Sensor Hub |
|---|---|
Use Scenario: Supplying core voltage (1.2V) and I/O voltage (3.3V) to a GSM modem SoC during TDMA transmit/receive cycles. IC Role / Device Role / Timing Role: Dual LDO providing isolated, low-noise, fast-response rails synchronized to burst-mode timing. Use Value: Prevents voltage droop-induced bit errors during 577μs transmit slots by maintaining ≤10mV deviation under 150mA load transients. | Use Scenario: Powering an ultra-low-power MCU (1.2V core) and environmental sensor interface (3.3V I²C bus) in a hearable device. IC Role / Device Role / Timing Role: Enabling independent sleep/wake control of subsystems via EN1/EN2 to minimize system-wide quiescent draw. Use Value: Achieves 60μA total system standby current by disabling 3.3V rail while retaining 1.2V core retention memory. |
| Bluetooth Audio Subsystem | Industrial Handheld Terminal |
Use Scenario: Delivering clean 1.2V bias to a Bluetooth LE radio IC and 3.3V to its audio codec during streaming. IC Role / Device Role / Timing Role: Dual LDO acting as noise-isolated post-regulator after a switching converter, rejecting switcher ripple. Use Value: 65dB PSRR at 1kHz ensures <50μVrms ripple on 3.3V rail - preventing audible artifacts in Class-D headphone amplifiers. | Use Scenario: Providing regulated 1.2V for an ARM Cortex-A53 application processor and 3.3V for its display interface in a ruggedized PDA. IC Role / Device Role / Timing Role: Dual LDO supporting cold-temperature operation (–40°C) with guaranteed ±2% output accuracy. Use Value: Maintains functional voltage margins across industrial temperature range without derating output current. |
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-1233FM-7 | Successor part with identical pinout, same 1.2V/3.3V outputs, but improved 45μA IQ and 120mV dropout at 150mA. | Direct drop-in replacement; supports longer battery life and lower minimum input voltage in new designs. | Select AP7345D for new designs requiring extended lifecycle support and tighter thermal performance. |
| MCP1826S-1203302E/DB | Microchip dual LDO with 1.2V/3.3V outputs, 90μA IQ, and 200mV dropout - lacks independent EN pins (single enable only). | Suitable for simpler systems where simultaneous channel control suffices; no sequencing capability. | Choose only if EN independence is unnecessary and Diodes' long-term availability is not required. |
Compared with AP7312-1233FM-7, the AP7345D offers lower quiescent current and dropout for enhanced efficiency in battery-critical applications, while the MCP1826S trades sequencing flexibility for broader vendor support - making AP7312 optimal for legacy-compatible designs needing independent rail control.
Availability
AP7312-1233FM-7 is available at Aetrix Electronics and suitable for cellular baseband power, wearable sensor hubs, Bluetooth audio subsystems, and industrial handheld terminals requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AP7312-1233FM-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 ICs for power management, signal integrity, and connectivity applications.
The AP7312 belongs to Diodes' precision LDO portfolio targeting portable and battery-powered systems - engineered for ultra-low IQ, fast transient response, and robust protection in space-constrained environments.
FAQ
What is the recommended input capacitor for AP7312-1233FM-7?
A minimum 1μF X5R/X7R ceramic capacitor placed between IN and GND is required for stability and noise suppression. The capacitor must be located within 2mm of the IN and GND pins using wide copper traces. Larger values (e.g., 2.2μF–10μF) further improve line transient response without affecting stability.
Can AP7312-1233FM-7 operate with a 1.8V input voltage?
No - the absolute minimum input voltage is 2.0V per the datasheet's Recommended Operating Conditions. At 1.8V input, the 3.3V channel cannot regulate (dropout exceeds available headroom), and the 1.2V channel may fail to start or exhibit poor line regulation. Valid input range is strictly 2.0V to 6.0V.
Does AP7312-1233FM-7 require a minimum load current for stability?
No - the AP7312 is stable down to zero load current on both channels. The datasheet explicitly states "no minimum load is required to keep the device stable," and the internal circuitry remains regulated even when output currents drop to 0mA, enabling true zero-power standby modes.
How does thermal shutdown behave during continuous overload?
When junction temperature reaches ~165°C, the device disables both outputs and enters thermal shutdown. It remains off until junction temperature falls to ~135°C (30°C hysteresis), then automatically resumes regulation. Under sustained overload, this causes cycling - visible as periodic output voltage collapse and recovery - protecting against permanent damage.
AP7312-1233FM-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, 3.3V
- 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
AP7312-1233FM-7 FAQ
1.How can I place an order for AP7312-1233FM-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7312-1233FM-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 AP7312-1233FM-7 reliable?
The price and inventory of AP7312-1233FM-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7312-1233FM-7 is usually 5 days.
3.What payment methods are accepted for AP7312-1233FM-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7312-1233FM-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7312-1233FM-7?
AP7312-1233FM-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7312-1233FM-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 AP7312-1233FM-7?
For technical support, including AP7312-1233FM-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7312-1233FM-7 requirements.
6.How does Aetrix verify that AP7312-1233FM-7 is sourced from the original manufacturer or authorized distributors?
All AP7312-1233FM-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 AP7312-1233FM-7 meets industry standards.
7.What is the process for return or replacement of AP7312-1233FM-7?
All AP7312-1233FM-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7312-1233FM-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 AP7312-1233FM-7 part is unused and in its original packaging.
Return procedure for AP7312-1233FM-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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