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Diodes Incorporated AP7312-1533W6-7
- Part No.:
- AP7312-1533W6-7
- Manufacturer:
- Diodes Incorporated
- Package:
- SOT-23-6
- Datasheet:
-
AP7312-1533W6-7.pdf
- Description:
- IC REG LINEAR 1.5V/3.3V SOT26
- Quantity:
- Payment:
- Shipping:
Inventory:2,648
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Product details
Overview
AP7312-1533W6-7 from Diodes Incorporated is a dual-channel, 150mA low-dropout linear regulator with independent enable inputs (EN1/EN2), fixed 1.5V and 3.3V outputs, 60μA quiescent current, and 150mV dropout at full load - designed for power rail separation in portable baseband subsystems.
For engineers reviewing the AP7312-1533W6-7 datasheet, AP7312-1533W6-7 pinout, AP7312-1533W6-7 application, or AP7312-1533W6-7 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 terminals but featuring separate EN1/EN2 control and OUT1/OUT2 outputs. Each channel uses a PMOS pass element with bandgap reference, error amplifier, and thermal shutdown circuitry - enabling simultaneous regulation of asymmetric voltage rails without cross-talk.
Its fast transient response (≤150μs start-up, <20mV undershoot/overshoot under 100mA load steps) stems from internal compensation optimized for 1μF ceramic output capacitors and low-ESR stability. The 65dB PSRR at 1kHz and ±2% output accuracy across –40°C to +85°C support noise-sensitive analog and RF supply domains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.5V (OUT1) and 3.3V (OUT2) - fixed, non-adjustable, enabling direct replacement of discrete single-LDO solutions in dual-rail systems. |
| Max Output Current | 150mA per channel - sufficient to power low-power microcontrollers, sensors, or RF front-end bias circuits without external boost stages. |
| 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 operation from 3.45V input to sustain 3.3V rail, critical for Li-ion battery discharge profiles. |
| 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 in Bluetooth headsets and wearables without voltage droop-induced resets. |
| Operating Temp | –40°C to +85°C ambient - validated for consumer handheld environments including thermal cycling during charging/discharging. |
Pinout & Package
SOT26 package: 6-pin surface-mount with exposed thermal pad (not electrically connected), 1.75mm × 2.9mm footprint, 1.3mm height - optimized for high-density PCB layouts in smartphones and wearables.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT2 (Pin 1) | Regulated 3.3V output | Must be bypassed with ≥1μF ceramic capacitor to GND; connects to 3.3V logic or I/O peripherals requiring clean supply. |
| GND (Pin 2) | Power and signal reference | Shared ground return for both LDO channels; requires low-impedance plane connection to minimize noise coupling. |
| EN2 (Pin 3) | Active-high enable for OUT2 | Pull high ≥1.4V to activate 3.3V rail; pull ≤0.4V to shut down - used for power-gating peripheral subsystems. |
| EN1 (Pin 4) | Active-high enable for OUT1 | Independent control of 1.5V rail; enables staggered power-up sequences to avoid inrush current peaks. |
| IN (Pin 5) | Input supply (2V–6V) | Requires ≥1μF ceramic decoupling to GND; accepts partially regulated DC-DC output or battery input directly. |
| OUT1 (Pin 6) | Regulated 1.5V output | Bypassed with ≥1μF ceramic capacitor; powers core logic or low-voltage memory interfaces needing tight tolerance. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent enable inputs | EN1/EN2 allow per-rail power sequencing - e.g., bring up 1.5V core before enabling 3.3V I/O to meet processor boot requirements. |
| Stable with 1μF ceramic output caps | Eliminates need for larger tantalum or aluminum electrolytic capacitors - reduces board area and cost in compact modules. |
| Fast load transient response | Maintains <±20mV regulation during 0→150mA load steps - prevents brown-out in DSPs or GSM transceivers during transmit bursts. |
| Thermal shutdown with hysteresis | Shuts down at 165°C junction temperature and re-enables at 135°C - prevents latch-up during sustained high-power operation in sealed enclosures. |
| Low EMI operation | No switching noise; PSRR >60dB up to 10kHz - avoids interference with sensitive RF receivers co-located on same PCB. |
Applications
| Cellular Baseband Power | Bluetooth Audio Subsystem |
|---|---|
Use Scenario: Powering GSM baseband ICs requiring separate 1.5V core and 3.3V I/O supplies during TDMA transmit/receive duty cycles. IC Role / Device Role / Timing Role: Dual LDO providing independently controlled, low-noise, fast-transient rails synchronized to burst-mode timing signals. Use Value: Prevents voltage droop-induced bit errors during 577μs transmit slots by maintaining regulation within ±15mV under 100mA load transients. | Use Scenario: Supplying Bluetooth headset SoC with 1.5V digital core and 3.3V audio codec/RF sections. IC Role / Device Role / Timing Role: Enables selective shutdown of 3.3V audio path during voice standby while keeping 1.5V core active for low-power listening. Use Value: Reduces average system current by 42μA (vs. single-rail LDO), extending battery life from 8 to 12 hours in Class 2 devices. |
| MP3 Player System-on-Chip | Smartphone Sensor Hub |
Use Scenario: Delivering clean 1.5V and 3.3V rails to MP3 decoder ASIC and display interface in portable media players. IC Role / Device Role / Timing Role: Provides fast start-up (<150μs) to meet instant-play user expectations after button press. Use Value: Eliminates audible pop/click artifacts by stabilizing both rails before DAC initialization sequence begins. | Use Scenario: Powering accelerometer, gyroscope, and ambient light sensor cluster with independent voltage requirements in smartphone sensor hubs. IC Role / Device Role / Timing Role: Supplies 1.5V to ultra-low-power motion sensor logic and 3.3V to analog front-end amplifiers simultaneously. Use Value: Achieves ±0.5% output accuracy over temperature - critical for calibrated sensor data integrity without software compensation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP7345D-1533FM-7 | Successor part with 30μA IQ, 120mV dropout, and improved PSRR (70dB @1kHz); same SOT26/DFN2018-6 footprints. | Designed for next-gen portable designs requiring longer battery life and tighter noise margins in RF sections. | Select for new designs where 50% lower quiescent current and enhanced transient immunity justify redesign effort. |
| MCP1826S-1503I/DB | Microchip dual LDO with 1.5V/3.3V outputs, 85μA IQ, 200mV dropout, and wider input range (1.8V–6.0V). | Lacks independent EN pins; uses single enable for both channels - unsuitable for staggered power sequencing. | Consider only if board layout constraints prevent use of AP7345D and independent enable is not required. |
Compared with AP7312-1533W6-7, the AP7345D offers halved quiescent current and superior PSRR for noise-critical RF rails, while the MCP1826S trades independent control for broader input compatibility - making the AP7312 optimal only for legacy designs retaining its specific sequencing capability.
Availability
AP7312-1533W6-7 is available at Aetrix Electronics and suitable for cellular phone baseband power, Bluetooth headset subsystems, and MP3 player SoC applications requiring stable component supply with consistent parametric performance across production batches.
Supply support for AP7312-1533W6-7 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 components for power management, signal integrity, and connectivity applications.
The AP7312 belongs to Diodes' low-quiescent-current LDO portfolio, engineered specifically for battery-powered portable electronics where dual-rail efficiency, fast transient response, and small-footprint packaging are mandatory design criteria.
FAQ
What is the recommended input capacitor for AP7312-1533W6-7?
A minimum 1μF X5R/X7R ceramic capacitor placed between IN and GND is required for stability and input noise suppression. Larger values (e.g., 4.7μF) improve line transient response but are not necessary for basic operation. The capacitor must be located within 2mm of the IN and GND pins using wide copper traces to minimize inductance and ensure reliable startup under fast input voltage ramps.
Can AP7312-1533W6-7 operate with a 1.8V input supply?
No - the absolute minimum input voltage is 2.0V per the datasheet's Recommended Operating Conditions. At 1.8V input, the 3.3V output channel cannot maintain regulation due to insufficient headroom (minimum dropout is 150mV, requiring ≥3.45V input for 3.3V output). For 1.8V input applications, consider the AP7345D series which supports down to 1.7V input.
How does thermal shutdown behave during continuous overload?
When junction temperature reaches 165°C, the AP7312 disables both outputs and enters thermal shutdown. It remains off until temperature drops to ~135°C (30°C hysteresis), then automatically resumes regulation. Under sustained overload (e.g., 150mA at VIN=6V), this cycle repeats at ~1–2Hz depending on PCB thermal mass - protecting the device but indicating inadequate heatsinking or excessive power dissipation.
Is AP7312-1533W6-7 RoHS compliant and lead-free?
Yes - AP7312-1533W6-7 uses lead-free finish and complies with EU Directive 2002/95/EC (RoHS), including all applicable exemptions. The molding compound is "Green" (halogen-free, no Br/Sb), and the SOT26 package meets JEDEC J-STD-020 moisture sensitivity level 1 (MSL1) for unlimited floor life at ≤30°C/85% RH.
AP7312-1533W6-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOT-23-6
- 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):
- 1.5V, 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:
- SOT-26
AP7312-1533W6-7 FAQ
1.How can I place an order for AP7312-1533W6-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7312-1533W6-7 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 AP7312-1533W6-7 reliable?
The price and inventory of AP7312-1533W6-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7312-1533W6-7 is usually 5 days.
3.What payment methods are accepted for AP7312-1533W6-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7312-1533W6-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7312-1533W6-7?
AP7312-1533W6-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7312-1533W6-7 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 AP7312-1533W6-7?
For technical support, including AP7312-1533W6-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7312-1533W6-7 requirements.
6.How does Aetrix verify that AP7312-1533W6-7 is sourced from the original manufacturer or authorized distributors?
All AP7312-1533W6-7 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 AP7312-1533W6-7 meets industry standards.
7.What is the process for return or replacement of AP7312-1533W6-7?
All AP7312-1533W6-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7312-1533W6-7, 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 AP7312-1533W6-7 part is unused and in its original packaging.
Return procedure for AP7312-1533W6-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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