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Diodes Incorporated AP2303MPTR-G1
- Part No.:
- AP2303MPTR-G1
- Manufacturer:
- Diodes Incorporated
- Category:
- Special Purpose Regulators
- Package:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Datasheet:
-
AP2303MPTR-G1.pdf
- Description:
- IC REG CONV DDR 1OUT 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:3,996
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Product details
Overview
AP2303MPTR-G1 from Diodes Incorporated is a DDR bus termination regulator designed to generate tightly tracked VTT voltage (0.6V–0.9V) for DDR-II/III/IIIL/IV memory systems. It sources or sinks up to ±1.75A, maintains output accuracy within ±10mV of ½VDDQ reference, and integrates OTSD and current-limit protection. Used on desktop/notebook motherboards and graphics cards for dynamic termination.
For engineers reviewing the AP2303MPTR-G1 datasheet, AP2303MPTR-G1 pinout, AP2303MPTR-G1 application, or AP2303MPTR-G1 equivalent, key selection criteria include bidirectional current capability, ±10mV tracking accuracy across temperature, soft-start/shutdown control via VREFEN, and PSOP-8 thermal performance (θJA = 80°C/W).
Technical Context
The AP2303MPTR-G1 implements a precision error amplifier with internal reference tracking to maintain VOUT = ½VREFEN over full load (±1.75A) and temperature (−40°C to +125°C). Its dual-mode operation supports both sourcing and sinking without external polarity switching.
Shutdown is controlled by three independent thresholds: VREFEN < 0.15V (active-low enable), VCNTL < 2.2V, and VIN < 0.4V - each triggering fast turn-off with thermal shutdown at +160°C and +30°C hysteresis. The PSOP-8 package uses an exposed pad tied to GND for enhanced thermal dissipation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage Range | 0.6V (DDR-IV) to 0.9V (DDR-II), set by external VREFEN reference |
| Source/Sink Current | ±1.75A continuous - enables full DDR termination compliance without external FETs |
| Output Tracking Accuracy | ±10mV vs. ½VREFEN - ensures signal integrity in high-speed DDR buses |
| Dropout Voltage | 520mV at 1.75A sink/source - supports low-VIN operation down to 1.2V |
| Thermal Shutdown | +160°C with +30°C hysteresis - prevents latch-up during sustained overload |
| Input Capacitor Requirement | 10µF ceramic on VIN - stabilizes transient response during 1.75A load steps |
| Operating Ambient Range | −40°C to +85°C - qualified for commercial motherboard and GPU applications |
Pinout & Package
AP2303MPTR-G1 is housed in a thermally enhanced PSOP-8 package with exposed pad (GND-connected) for improved heat dissipation (θJA = 80°C/W, θJC = 38°C/W). Pin layout matches SOIC-8 footprint but adds thermal pad for higher power density.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 VIN | Unregulated input supply | Accepts 1.2V–5.5V; requires 10µF MLCC to GND for transient stability |
| 2 GND | Power and signal ground | Primary return path; connects to exposed pad for thermal conduction |
| 3 VREFEN | Reference input / active-low enable | Tracks ½VDDQ; <0.15V disables regulator with soft-start on release (~0.1ms) |
| 4 VOUT | Regulated bidirectional output | Delivers ±1.75A; requires ≥10µF ceramic capacitor to GND for loop stability |
| 5, 7, 8 NC | No connection | Not internally bonded; must remain unconnected per design |
| 6 VCNTL | Control circuit supply | 3.0–5.5V bias for internal logic; must be ≥VIN during power sequencing |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional termination regulation | ±1.75A sourcing/sinking eliminates need for discrete FET pairs in DDR VTT rails |
| Tight ½VDDQ tracking | ±10mV offset ensures JEDEC-compliant signal eye margin across DDR-II to DDR-IV |
| Triple-input shutdown control | VIN, VCNTL, and VREFEN each have independent under-voltage lockout thresholds |
| Integrated thermal protection | +160°C shutdown with +30°C hysteresis prevents thermal runaway during sustained overload |
| PSOP-8 thermal optimization | Exposed pad reduces junction-to-ambient resistance to 80°C/W - critical for 1.25W max PD at TA=25°C |
Applications
| Desktop Motherboard DDR Termination | Graphics Card Memory Interface |
|---|---|
Use Scenario: Regulating VTT for dual-channel DDR4 memory subsystem on ATX motherboard. IC Role / Device Role / Timing Role: Bidirectional termination regulator tracking ½VDDQ at 0.6V with ±1.75A peak current. Use Value: Maintains ±10mV output accuracy across −40°C to +85°C ambient, ensuring stable signal integrity at 3200MT/s data rates. | Use Scenario: Providing dynamic VTT termination for GDDR6 memory on PCIe-based GPU board. IC Role / Device Role / Timing Role: Sourcing/sinking termination current synchronized to memory controller's VREFEN reference. Use Value: Soft-start on VREFEN release prevents voltage overshoot during GPU boot, reducing bit-error risk. |
| STB DDR3 Memory Subsystem | LCD-TV DDR2 Memory Rail |
Use Scenario: Powering DDR3 termination on set-top box SoC platform with tight space constraints. IC Role / Device Role / Timing Role: Low-dropout linear regulator delivering 0.75V VTT with integrated OTSD and current limit. Use Value: PSOP-8 package with exposed pad enables 1.25W power handling in compact 6.9mm × 3.9mm footprint. | Use Scenario: Generating DDR2 VTT (0.9V) on cost-sensitive LCD-TV mainboard with legacy DDR interface. IC Role / Device Role / Timing Role: Precision-tracking LDO supporting 1.8V VIN and 3.3V VCNTL supply domains. Use Value: ±2% full-load output accuracy meets JEDEC JESD79-2F spec for DDR2 termination voltage tolerance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar DDR termination regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP2301MPTR-G1 | SOIC-8 only; θJA = 110°C/W; max ±1.5A output | Limited to lower-power DDR-II/III designs with <1.5A peak current demand | Select when board space allows SOIC-8 and thermal budget permits higher junction rise |
| TPS51200DRCT | TI part with 3A sink/source; requires external compensation; no integrated VREFEN tracking | Supports higher-current DDR3L/DDR4 but needs additional feedback resistors and compensation network | Choose for >1.75A systems where design flexibility outweighs integration trade-offs |
Compared with AP2301MPTR-G1, the AP2303MPTR-G1 delivers +0.25A higher bidirectional current and 30°C/W lower thermal resistance in PSOP-8; versus TPS51200DRCT, it offers tighter ±10mV tracking without external resistor networks but lacks programmable features.
Availability
AP2303MPTR-G1 is available at Aetrix Electronics and suitable for desktop motherboards, graphics cards, and STB/LCD-TV memory subsystems requiring stable component supply with RoHS/Green compliance and automotive-grade change control support.
Supply support for AP2303MPTR-G1 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 high-volume electronics markets.
The AP2303 product line targets DDR memory termination in computing and consumer electronics, delivering integrated source/sink regulation with JEDEC-compliant tracking accuracy and robust thermal protection.
FAQ
What is the minimum output capacitor required for stable operation?
The AP2303MPTR-G1 requires a minimum 10µF ceramic capacitor on VOUT to ensure loop stability across all operating conditions, including ±1.75A load transients and −40°C to +125°C junction temperature. Aluminum electrolytic capacitors may supplement but must also meet the 10µF minimum and low-ESR specification.
How does the VREFEN pin function during power-up and shutdown?
VREFEN serves as both reference input and active-low enable: when pulled above 0.4V, the device enters soft-start mode (~0.1ms ramp); when dropped below 0.15V, it initiates fast shutdown. This dual role synchronizes termination voltage activation with memory controller readiness, preventing bus contention.
Can AP2303MPTR-G1 operate with VIN lower than VCNTL?
No - the datasheet explicitly requires VCNTL ≥ VIN during both power-on and power-off sequences to prevent internal logic malfunction. Violating this condition risks undefined behavior, including failure to regulate or improper shutdown activation.
Is AP2303MPTR-G1 qualified for automotive applications?
The AP2303MPTR-G1 is not AEC-Q100 qualified by default, but Diodes Incorporated offers automotive-grade variants with PPAP capability and IATF 16949 manufacturing. Customers requiring automotive qualification must contact Diodes directly for change-controlled versions and documentation.
AP2303MPTR-G1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Applications:
- Converter, DDR
- Voltage - Input:
- 1.2V ~ 5.5V
- Number of Outputs:
- 1
- Voltage - Output:
- 0.6V ~ 2.75V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO-EP
AP2303MPTR-G1 FAQ
1.How can I place an order for AP2303MPTR-G1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP2303MPTR-G1 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 AP2303MPTR-G1 reliable?
The price and inventory of AP2303MPTR-G1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP2303MPTR-G1 is usually 5 days.
3.What payment methods are accepted for AP2303MPTR-G1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP2303MPTR-G1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP2303MPTR-G1?
AP2303MPTR-G1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP2303MPTR-G1 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 AP2303MPTR-G1?
For technical support, including AP2303MPTR-G1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP2303MPTR-G1 requirements.
6.How does Aetrix verify that AP2303MPTR-G1 is sourced from the original manufacturer or authorized distributors?
All AP2303MPTR-G1 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 AP2303MPTR-G1 meets industry standards.
7.What is the process for return or replacement of AP2303MPTR-G1?
All AP2303MPTR-G1 units undergo pre-shipment inspection (PSI). If there is an issue with AP2303MPTR-G1, 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 AP2303MPTR-G1 part is unused and in its original packaging.
Return procedure for AP2303MPTR-G1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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