My Inquiry
My Account
Diodes Incorporated AP7344D-1812RH4-7
- Part No.:
- AP7344D-1812RH4-7
- Manufacturer:
- Diodes Incorporated
- Package:
- 8-XFDFN Exposed Pad
- Datasheet:
-
AP7344D-1812RH4-7.pdf
- Description:
- IC REG LIN 1.2V/1.8V X2DFN1612-8
- Quantity:
- Payment:
- Shipping:
Inventory:4,362
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AP7344D-1812RH4-7 from Diodes Incorporated is a dual-channel CMOS low-dropout regulator delivering fixed 1.8V and 1.2V outputs, each rated for 300mA continuous current, ±1% output voltage accuracy, 75dB PSRR at 1kHz, and 60µVrms output noise (10Hz–100kHz). It operates from 1.7V to 5.25V input and supports independent enable control per channel for power sequencing in compact portable electronics.
For engineers reviewing the AP7344D-1812RH4-7 datasheet, AP7344D-1812RH4-7 pinout, AP7344D-1812RH4-7 application, or AP7344D-1812RH4-7 equivalent, key selection criteria include dual-rail low-noise biasing, thermal performance in X2-DFN1612-8, independent EN control timing, and discharge capability for fast VOUT ramp-down in RF and imaging subsystems.
Technical Context
The AP7344D-1812RH4-7 integrates two independent LDO regulators on a single CMOS die, each with dedicated error amplifier, voltage reference, current-limit circuit, and enable input. Its architecture supports simultaneous or staggered activation of both channels without cross-regulation interference.
Each channel features built-in auto-discharge (enabled by D-suffix), providing active pull-down of VOUT during shutdown to prevent floating rail conditions-critical for RF front-end biasing and camera sensor power domains where residual charge causes startup glitches or leakage paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Channel 1: 1.8V ±1%; Channel 2: 1.2V ±1% - enables precise dual-rail biasing for mixed-signal SoCs and image signal processors. |
| Max Output Current | 300mA per channel - sufficient to power RF transceivers, camera modules, or baseband processors without external boost stages. |
| PSRR | 75dB at 1kHz - suppresses switching noise from DC/DC converters feeding the LDO input, preserving signal integrity in sensitive analog blocks. |
| Output Noise | 60µVrms (10Hz–100kHz) - meets low-noise requirements for ADC references, PLL VCO supplies, and audio codec bias rails. |
| Dropout Voltage | 0.22V (at 300mA, VOUT = 1.8V); 0.48V (at 300mA, VOUT = 1.2V) - enables operation from single-cell Li-ion (3.0V min) or boosted 1.8V/1.2V system rails. |
| Quiescent Current | 50µA (one channel active, no load); 100µA (both channels active, no load) - extends battery life in always-on sensor nodes and standby modes. |
| Enable Threshold | EN high ≥1.3V; EN low ≤0.5V - compatible with 1.8V/3.3V GPIO logic without level-shifting, simplifying host MCU interface. |
Pinout & Package
X2-DFN1612-8 package: 1.6mm × 1.2mm × 0.39mm body, 0.4mm pitch, thermal pad (exposed copper) for enhanced heat dissipation. Requires PCB ground plane connection to thermal pad for optimal thermal performance (θJA ≈ 180°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pins 1, 4) | Common ground reference | Dual GND pins reduce ground loop impedance and improve PSRR; must be connected to low-impedance PCB ground plane. |
| VOUT1 (Pin 2) | Channel 1 regulated output | Delivers fixed 1.8V; requires local 1.0µF ceramic capacitor placed adjacent to pin for stability and transient response. |
| VOUT2 (Pin 3) | Channel 2 regulated output | Delivers fixed 1.2V; includes internal discharge FET (D-suffix) to actively sink current during shutdown. |
| EN2 (Pin 5) | Channel 2 enable input | Active-high logic control; must not float - tie to VIN2 or MCU GPIO to sequence camera sensor core voltage after I/O rail. |
| VIN2 (Pin 6) | Channel 2 input supply | Accepts 1.7V–5.25V; decoupled by 1.0µF ceramic capacitor close to pin to suppress input ripple and load transients. |
| VIN1 (Pin 7) | Channel 1 input supply | Independent input path allows separate power domain sourcing (e.g., buck converter vs. battery direct) for improved fault isolation. |
| EN1 (Pin 8) | Channel 1 enable input | Enables independent power-up timing for RF PA bias (VOUT1) before baseband logic (VOUT2), reducing inrush current peaks. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent LDOs with auto-discharge | Each channel includes active discharge FET (50Ω typical ON-resistance) to clear residual charge within microseconds - prevents latch-up in downstream logic during power cycling. |
| Ultra-low noise & high PSRR | 60µVrms noise + 75dB PSRR at 1kHz ensures clean supply for RF synthesizers and high-resolution ADCs without additional filtering. |
| Wide input voltage range | 1.7V–5.25V operation supports direct battery input (single Li-ion), intermediate bus rails (3.3V/2.5V), and post-regulated DC/DC outputs. |
| ±1% output accuracy over temp | Guaranteed -40°C to +85°C - maintains tight voltage margins for 1.2V core logic and 1.8V I/O in mobile SoCs without calibration. |
| Low quiescent current | 50µA (one channel active) enables >1-year battery life in always-on wearable sensors powered by coin cells or energy harvesters. |
Applications
| Smartphone Camera Module | RF Transceiver Bias Rail |
|---|---|
|
Use Scenario: Dual-rail power for CMOS image sensor (1.2V digital core + 1.8V analog I/O). IC Role / Device Role / Timing Role: AP7344D-1812RH4-7 provides sequenced, low-noise bias: EN1 activates VOUT1 (1.8V) first for I/O initialization, then EN2 enables VOUT2 (1.2V) for core logic. Use Value: Auto-discharge on VOUT2 prevents sensor latch-up during mode transitions; 60µVrms noise avoids image banding in low-light capture. |
Use Scenario: Clean supply for RF power amplifier and VCO in Bluetooth/Wi-Fi combo chip. IC Role / Device Role / Timing Role: VOUT1 (1.8V) powers PA bias circuitry; VOUT2 (1.2V) supplies VCO tuning and PLL reference divider. Use Value: 75dB PSRR rejects switching noise from shared PMIC input; independent EN control enables transmit/receive power gating. |
| Portable Media Player Audio Codec | Wireless Adapter Baseband Processor |
|
Use Scenario: Low-noise bias for stereo DAC, headphone amplifier, and microphone preamp. IC Role / Device Role / Timing Role: VOUT1 (1.8V) powers analog front-end; VOUT2 (1.2V) supplies digital audio interface and clock recovery logic. Use Value: 60µVrms noise floor preserves SNR >100dB; ±1% accuracy ensures consistent THD across battery discharge cycle. |
Use Scenario: Dual-voltage supply for Wi-Fi/BLE SoC requiring 1.2V core and 1.8V PHY interface. IC Role / Device Role / Timing Role: VOUT2 (1.2V) powers CPU and memory; VOUT1 (1.8V) drives RF transceiver interface and SDIO lines. Use Value: Independent enable allows deep-sleep mode (VOUT2 off, VOUT1 retained for wake-on-RF); low IQ extends standby time. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP7345D-1812RH4-7 | Successor device with improved PSRR (80dB @1kHz), lower dropout (0.18V @300mA, 1.8V), and extended temp range (−40°C to +125°C). | Required for automotive AEC-Q100 Grade 2 designs; preferred for new designs needing higher reliability margin. | Select when upgrading legacy AP7344-based designs or targeting extended temperature operation. |
| TPL7407LDR | Single-channel 300mA LDO (1.8V only), no discharge function, 65dB PSRR, 30µVrms noise, SOT-23-6 package. | Lacks dual-rail capability and auto-discharge; suitable only for single-rail applications with space-constrained layouts. | Use only if second rail is supplied elsewhere and board area prohibits DFN footprint. |
Compared with AP7344D-1812RH4-7, AP7345D-1812RH4-7 offers superior thermal robustness and noise rejection for next-gen portable designs, while TPL7407LDR trades integration for smaller size in non-dual applications - neither matches the exact 1.8V/1.2V discharge-enabled dual functionality.
Availability
AP7344D-1812RH4-7 is available at Aetrix Electronics and suitable for smartphone camera modules, RF transceiver biasing, portable media player audio codecs, and wireless adapter baseband processors requiring stable component supply across industrial temperature ranges.
Supply support for AP7344D-1812RH4-7 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 power management, signal integrity, and protection solutions for consumer, industrial, and communications markets.
The AP7344 series belongs to Diodes' high-PSRR, low-noise LDO portfolio designed specifically for battery-powered portable electronics requiring dual-rail precision regulation with minimal board area and thermal overhead.
FAQ
Is AP7344D-1812RH4-7 recommended for new designs?
No - Diodes Incorporated explicitly states "AP7344 IS NOT RECOMMENDED FOR NEW DESIGNS. PLEASE USE THE AP7345D." The AP7345D offers improved PSRR, lower dropout, extended temperature rating, and full AEC-Q100 qualification support. AP7344D-1812RH4-7 remains available for legacy design support and existing production ramps.
What is the purpose of the thermal pad in the X2-DFN1612-8 package?
The exposed thermal pad (Pin "-") must be connected to a large PCB copper area tied to GND for effective heat dissipation. It reduces junction-to-ambient thermal resistance (θJA) by ~30%, enabling sustained 300mA operation at +85°C ambient. Do not use it as sole GND electrode - maintain separate GND connections for Pins 1 and 4.
How does the auto-discharge feature operate on Channel 2?
When EN2 is pulled low, the internal N-channel FET (50Ω typical RON) connects VOUT2 to GND, actively discharging external capacitors. This clears residual voltage within ~10µs (dependent on COUT), preventing unintended logic states in downstream circuits during power-down sequences - critical for camera sensor reset and RF PA turn-off.
Can AP7344D-1812RH4-7 be used with ceramic output capacitors smaller than 1.0µF?
Yes - the device is stable with ≥0.47µF ceramic capacitors, but Diodes specifies 1.0µF as optimal for worst-case transient response and PSRR performance. Using <1.0µF may degrade load step recovery (e.g., >50mV undershoot at 300mA step) and reduce high-frequency PSRR margin, especially above 100kHz.
AP7344D-1812RH4-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 8-XFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 2
- Voltage - Input (Max):
- 5.25V
- Voltage - Output (Min/Fixed):
- 1.2V, 1.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.5V @ 300mA, 0.39V @ 300mA
- Current - Output:
- 300mA, 300mA
- Current - Quiescent (Iq):
- 140 µA
- Current - Supply (Max):
- -
- PSRR:
- 75dB (1kHz)
- Control Features:
- Enable
- Protection Features:
- Over Current
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- X2-DFN1612-8
AP7344D-1812RH4-7 FAQ
1.How can I place an order for AP7344D-1812RH4-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7344D-1812RH4-7 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 AP7344D-1812RH4-7 reliable?
The price and inventory of AP7344D-1812RH4-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7344D-1812RH4-7 is usually 5 days.
3.What payment methods are accepted for AP7344D-1812RH4-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7344D-1812RH4-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7344D-1812RH4-7?
AP7344D-1812RH4-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7344D-1812RH4-7 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 AP7344D-1812RH4-7?
For technical support, including AP7344D-1812RH4-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7344D-1812RH4-7 requirements.
6.How does Aetrix verify that AP7344D-1812RH4-7 is sourced from the original manufacturer or authorized distributors?
All AP7344D-1812RH4-7 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 AP7344D-1812RH4-7 meets industry standards.
7.What is the process for return or replacement of AP7344D-1812RH4-7?
All AP7344D-1812RH4-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7344D-1812RH4-7, 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 AP7344D-1812RH4-7 part is unused and in its original packaging.
Return procedure for AP7344D-1812RH4-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AP7344D-1812RH4-7 Tags
-
MIC5504-1.8YM5-TR
Microchip Technology
-
MIC5504-3.3YM5-TR
Microchip Technology
-
MIC5365-3.0YC5-TR
Microchip Technology
-
MIC5365-1.8YC5-TR
Microchip Technology
-
MIC5365-2.5YC5-TR
Microchip Technology
-
MIC5365-3.3YC5-TR
Microchip Technology
-
MIC5365-3.3YD5-TR
Microchip Technology
-
MIC5317-3.3YM5-TR
Microchip Technology
-
TLV1117LV33DCYR
Texas Instruments
-
MIC5317-3.3YMT-TZ
Microchip Technology
-
MIC5528-3.3YMT-TR
Microchip Technology
-
TLV75801PDRVR
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
