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Diodes Incorporated AP7332-2833FM-7
- Part No.:
- AP7332-2833FM-7
- Manufacturer:
- Diodes Incorporated
- Package:
- 6-UFDFN Exposed Pad
- Datasheet:
-
AP7332-2833FM-7.pdf
- Description:
- IC REG LINEAR 2.8V/3.3V 6DFN2018
- Quantity:
- Payment:
- Shipping:
Inventory:3,762
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Product details
Overview
AP7332-2833FM-7 from Diodes Incorporated is a dual-channel, 300mA low-dropout linear regulator with independent enable control (EN1/EN2), fixed 2.8V and 3.3V outputs, 60μA quiescent current, and fast 150μs startup time. It operates from 2V to 6V input and delivers stable power to baseband processors and RF sections in portable wireless devices.
For engineers reviewing the AP7332-2833FM-7 datasheet, AP7332-2833FM-7 pinout, AP7332-2833FM-7 application, or AP7332-2833FM-7 equivalent, this device supports independent channel sequencing, ultra-low IQ for battery longevity, high PSRR (65dB @ 1kHz), and stability with 1μF ceramic output capacitors - critical for GSM/TDMA load transients and compact PCB layouts.
Technical Context
The AP7332 integrates two independent LDO channels sharing a common input but featuring separate EN pins, error amplifiers, bandgap references, and thermal shutdown circuitry. Each channel uses a PMOS pass element enabling low dropout (250mV @ 300mA for VOUT ≥ 2.5V) and rail-to-rail operation down to 2V input.
Its fast transient response is achieved via optimized internal compensation and low-output-impedance design, delivering <20mV undershoot/overshoot during 10mA–300mA load steps. The DFN2018-6 package provides θJA = 60°C/W, supporting higher continuous current than SOT26 under identical ambient conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.8V (Channel 1) and 3.3V (Channel 2) - fixed, factory-trimmed for ±2% accuracy across –40°C to +85°C. |
| Max Output Current | 300mA per channel - sustained delivery without thermal shutdown under typical PCB layout (DFN2018-6, 2-layer board). |
| Quiescent Current | 60μA (both channels active) - enables >1-year battery life in always-on sensor nodes powered by coin cells. |
| Dropout Voltage | 250mV @ 300mA (for 3.3V channel) - allows operation from 3.55V input, maximizing usable voltage range of single-cell Li-ion (3.0–4.2V). |
| PSRR | 65dB @ 1kHz - suppresses switching noise from DC-DC converters feeding the LDO input, protecting sensitive RF/analog circuits. |
| Start-up Time | 150μs - enables rapid wake-up from deep sleep in Bluetooth headsets and wearables without system timing violations. |
| Thermal Shutdown | 165°C activation with 30°C hysteresis - prevents permanent damage during sustained overload or poor heatsinking. |
Pinout & Package
AP7332-2833FM-7 is housed in a 6-pin DFN2018-6 package (2.0mm × 1.8mm × 0.6mm), featuring an exposed thermal pad for enhanced heat dissipation (θJA = 60°C/W). Pin 4 is GND and serves as the primary thermal path.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN (Pin 1) | Main power input | Accepts 2V–6V; requires ≥1μF ceramic bypass capacitor placed adjacent to pin for EMI suppression and stability. |
| EN1 (Pin 2) | Channel 1 enable control | Active-high logic input (VIH ≥ 1.4V); controls 2.8V output independently - enables power sequencing in multi-rail systems. |
| EN2 (Pin 3) | Channel 2 enable control | Active-high logic input (VIH ≥ 1.4V); controls 3.3V output separately - supports dynamic power gating of peripherals. |
| GND (Pin 4) | Ground reference & thermal sink | Must be connected to large copper pour; thermal pad soldered to PCB ground plane for reliable 300mA operation. |
| OUT2 (Pin 5) | 2.8V regulated output | Delivers up to 300mA; requires 1μF ceramic capacitor (ESR ≥10mΩ) directly at pin for transient stability. |
| OUT1 (Pin 6) | 3.3V regulated output | Delivers up to 300mA; decoupled independently to avoid cross-talk between 2.8V and 3.3V domains. |
Key Features
| Feature | Design Value |
|---|---|
| Independent dual-channel enable | EN1 and EN2 allow staggered power-up/down of 2.8V and 3.3V rails - essential for avoiding back-powering and bus contention in SoC interfaces. |
| Ultra-low quiescent current | 60μA total (both channels) - reduces standby power loss by >90% vs. legacy LDOs, extending shelf life of IoT edge sensors. |
| Fast load transient response | <20mV deviation during 10mA→300mA step - maintains clean supply to GSM baseband ICs during TDMA burst transmission without external compensation. |
| Stable with minimal capacitance | Guaranteed stability with 1μF ceramic output caps - eliminates need for bulky tantalum or high-ESR capacitors, saving board space and cost. |
| Integrated protection suite | Current limit (600mA), short-circuit clamp (120mA), and thermal shutdown (165°C) - removes requirement for external fault management circuitry. |
Applications
| Bluetooth Headset Power Management | GSM Baseband Core Supply |
|---|---|
|
Use Scenario: Dual-rail power delivery to Bluetooth audio codec (2.8V) and RF transceiver (3.3V) in compact earbud designs. IC Role / Device Role / Timing Role: Primary LDO supplying regulated, low-noise bias to analog front-end and digital core; EN2 enables fast mute/unmute sequencing. Use Value: 65dB PSRR rejects noise from shared DC-DC converter; 150μs startup aligns with Bluetooth link establishment timing. |
Use Scenario: Powering GSM baseband processor requiring tightly regulated 2.8V I/O and 3.3V core rails during 12.5% duty-cycle transmit bursts. IC Role / Device Role / Timing Role: Fast-transient LDO maintaining voltage within ±2% during 0→300mA load steps at 217Hz burst rate. Use Value: <20mV undershoot prevents DSP reset; independent EN pins allow core rail retention while I/O rail powers down between frames. |
| Smartphone Application Processor I/O | Portable Medical Sensor Hub |
|
Use Scenario: Supplying 2.8V display interface and 3.3V camera module interface in smartphone auxiliary subsystems. IC Role / Device Role / Timing Role: Secondary LDO providing isolated, low-noise rails with independent enable for peripheral power gating. Use Value: 60μA IQ minimizes background drain during screen-off state; DFN2018-6 footprint fits tight camera flex PCB areas. |
Use Scenario: Powering ultra-low-power ECG front-end (2.8V) and BLE radio (3.3V) in disposable wearable patches. IC Role / Device Role / Timing Role: Primary regulator for battery-powered medical node; EN1/EN2 synchronize with sensor acquisition and telemetry cycles. Use Value: 2.0V minimum input extends usable battery range down to 2.2V; RoHS-compliant "Green" compound meets ISO 10993 biocompatibility prep requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP7344-2833FM-7 | Successor with lower IQ (35μA), improved PSRR (70dB @ 1kHz), and tighter output tolerance (±1.5%). Same pinout and footprint. | Preferred for new designs targeting >5-year battery life or stricter noise budgets in hearing aids and implantables. | Select AP7344 if upgrading from AP7332; no layout change required and qualification data available. |
| Torex XC6216D283MR-G | Single-channel only; 2.8V fixed output, 200mA rating, 1.0μA IQ. No EN2 or 3.3V rail. DFN1616-6 package. | Only suitable when 3.3V rail is supplied separately - adds BOM complexity and board area vs. integrated dual-LDO solution. | Use only if 3.3V is already available elsewhere; not a functional replacement due to missing second output and lower current capability. |
Compared with AP7332-2833FM-7, AP7344 offers measurable gains in efficiency and noise rejection without redesign, while XC6216D283MR-G forces split-rail implementation and sacrifices 100mA per channel - making it inferior for space-constrained dual-voltage systems.
Availability
AP7332-2833FM-7 is available at Aetrix Electronics and suitable for cellular handsets, Bluetooth audio accessories, and portable medical sensors requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for AP7332-2833FM-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 AP7332 belongs to Diodes' high-performance LDO portfolio designed specifically for battery-powered portable electronics demanding ultra-low IQ, fast transient response, and dual-rail flexibility in minimal footprint.
FAQ
What is the minimum input voltage required for stable 2.8V/3.3V output at full 300mA load?
The AP7332-2833FM-7 requires VIN ≥ 3.05V for the 2.8V channel (300mV dropout) and VIN ≥ 3.55V for the 3.3V channel (250mV dropout, per datasheet Section 5). At 300mA, both outputs remain regulated as long as input stays above these thresholds - verified across –40°C to +85°C ambient.
Can EN1 and EN2 be tied together and driven by a single microcontroller GPIO?
Yes - EN1 and EN2 may be paralleled and driven by one logic signal, enabling simultaneous on/off control of both 2.8V and 3.3V outputs. Input leakage is ≤1μA per pin, so combined loading remains negligible for standard MCU outputs. However, independent control is lost, eliminating sequencing capability.
Is a minimum load required for output stability?
No minimum load is required. The AP7332 remains stable and fully regulated from zero load to 300mA per channel, as confirmed in the Application Note (Section 12) and Electrical Characteristics table. This enables use in intermittent-sensing applications where one or both rails may be idle for extended periods.
How does thermal performance differ between DFN2018-6 and SOT26 packages?
DFN2018-6 achieves θJA = 60°C/W (2-layer board, 2oz Cu), enabling ~3× higher continuous power dissipation than SOT26 (θJA = 140°C/W). At 300mA and VIN = 5V, DFN2018-6 junction rise is ~18°C vs. ~42°C for SOT26 - allowing reliable operation in enclosed handheld enclosures without derating.
AP7332-2833FM-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):
- 2.8V, 3.3V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.4V @ 300mA, 0.4V @ 300mA
- Current - Output:
- 300mA, 300mA
- 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
AP7332-2833FM-7 FAQ
1.How can I place an order for AP7332-2833FM-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7332-2833FM-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 AP7332-2833FM-7 reliable?
The price and inventory of AP7332-2833FM-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7332-2833FM-7 is usually 5 days.
3.What payment methods are accepted for AP7332-2833FM-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7332-2833FM-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7332-2833FM-7?
AP7332-2833FM-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7332-2833FM-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 AP7332-2833FM-7?
For technical support, including AP7332-2833FM-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7332-2833FM-7 requirements.
6.How does Aetrix verify that AP7332-2833FM-7 is sourced from the original manufacturer or authorized distributors?
All AP7332-2833FM-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 AP7332-2833FM-7 meets industry standards.
7.What is the process for return or replacement of AP7332-2833FM-7?
All AP7332-2833FM-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7332-2833FM-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 AP7332-2833FM-7 part is unused and in its original packaging.
Return procedure for AP7332-2833FM-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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