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Diodes Incorporated PAM3116BLBADJR
- Part No.:
- PAM3116BLBADJR
- Manufacturer:
- Diodes Incorporated
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
PAM3116BLBADJR.pdf
- Description:
- IC REG LINEAR POS ADJ 1.5A 8SOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,819
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Product details
Overview
PAM3116BLBADJR from Diodes Incorporated is a 1.5A adjustable-output CMOS low-dropout (LDO) voltage regulator in SOP-8 package, featuring 300mV dropout at 1.5A (VO ≥ 2.5V), 0.8V internal reference, ±1.5% output voltage accuracy, and over-temperature shutdown. It delivers stable regulation for FPGA core supplies and post-regulation in switch-mode power supplies with ceramic output capacitors ≥4.7µF.
For engineers reviewing the PAM3116BLBADJR datasheet, PAM3116BLBADJR pinout, PAM3116BLBADJR application, or PAM3116BLBADJR equivalent, key selection criteria include dropout performance at full load, thermal shutdown threshold (150°C), EN logic compatibility (1.5V high/0.3V low), and stability with low-ESR ceramic capacitors - all critical for compact, thermally constrained DC/DC subsystems.
Technical Context
The PAM3116BLBADJR uses a CMOS pass transistor architecture enabling low quiescent current (90–150µA) and low dropout without requiring external PNP transistors. Its feedback loop is internally compensated for stability with ≥4.7µF ceramic output capacitance, eliminating need for ESR tuning.
It integrates three protection mechanisms: foldback current limiting (2.5A max), thermal shutdown at 150°C with 40°C hysteresis, and short-circuit current limiting (~700mA). The ADJ pin senses 0.8V reference, allowing programmable output from 0.8V to 5.0V via external resistor divider.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 1.5A continuous - supports FPGA I/O banks and microprocessor core rails without derating at 85°C ambient. |
| Dropout Voltage | 300mV @ 1.5A, VO ≥ 2.5V - enables efficient 3.3V→2.5V or 5.0V→3.3V conversion with minimal headroom loss. |
| Reference Voltage | 0.8V ±1.2% (0.788–0.812V) - sets precision of adjustable output; determines resistor ratio tolerance impact on final VO accuracy. |
| Quiescent Current | 90–150µA - maintains efficiency in always-on subsystems (e.g., standby power domains) without sacrificing transient response. |
| PSRR | 70dB @ 100Hz - suppresses low-frequency ripple from upstream switching converters, critical for noise-sensitive analog/RF sections. |
| Output Noise | 50µVRMS (10Hz–100kHz) - meets low-noise requirements for PLLs, ADC references, and RF power amplifiers. |
| Thermal Shutdown | 150°C junction trip with 40°C hysteresis - prevents permanent damage during sustained overload or poor PCB thermal design. |
Pinout & Package
Package: SOP-8 (Surface-Mount Small Outline Package, 150mil body width, 1.27mm pitch).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 2) | Input supply connection | Accepts 2.5–6.0V input; requires ≥4.7µF ceramic bypass capacitor placed adjacent to pin for stability. |
| EN (Pin 3) | Enable control input | Active-high logic: ≥1.5V enables regulation; ≤0.3V disables output and reduces shutdown current to 1µA. |
| GND (Pin 4) | Power ground reference | Primary return path for load current and feedback network; must be low-impedance connection to minimize noise coupling. |
| ADJ (Pin 6) | Feedback reference node | Senses 0.8V internal reference; connects to resistor divider (R1/R2) to set output voltage per VO = 0.8 × (1 + R1/R2). |
| VOUT (Pin 7) | Regulated output terminal | Delivers up to 1.5A; requires ≥4.7µF ceramic output capacitor to ground for phase margin and transient stability. |
| NC (Pins 1, 5, 8) | No internal connection | Not bonded; must remain unconnected and unpopulated on PCB to avoid parasitic coupling or mechanical stress. |
Key Features
| Feature | Design Value |
|---|---|
| Ceramic-capacitor stability | Guaranteed stable with ≥4.7µF X5R/X7R ceramic output capacitor - eliminates need for tantalum or aluminum electrolytic parts. |
| Low-noise regulation | 50µVRMS output noise (10Hz–100kHz) - suitable for powering PLLs, clock buffers, and high-resolution ADC/DAC references. |
| Fast thermal recovery | 40°C hysteresis after over-temperature shutdown - enables automatic resumption of operation once junction cools to ~110°C. |
| Programmable output range | 0.8V to 5.0V via external resistor divider - supports diverse core/logic rail requirements without discrete part variants. |
| Integrated protection | Current limit (2.5A), short-circuit limit (700mA), and thermal shutdown (150°C) - reduces need for external fault management circuitry. |
Applications
| Set-Top Box Power Rails | FPGA Core Supply |
|---|---|
Use Scenario: Regulating 1.2V or 1.8V core voltages for SoC and video processing ICs in consumer STB platforms. IC Role / Device Role / Timing Role: Post-regulator following buck converter; provides low-noise, tightly regulated voltage for digital logic domains. Use Value: 50µVRMS noise and ±1.5% accuracy ensure timing margin integrity for DDR interfaces and video pipeline clocks. |
Use Scenario: Delivering 1.0V or 1.2V to FPGA core banks where load transients exceed 1A/µs. IC Role / Device Role / Timing Role: Primary LDO for configurable logic fabric; handles dynamic current steps while maintaining <±2% output deviation. Use Value: 300mV dropout at 1.5A minimizes power loss and heat generation in space-constrained BGA packages. |
| iPhone Charger Secondary Regulation | Telecom Line Card Bias |
Use Scenario: Generating 3.3V auxiliary rail from 5V USB input in compact wall adapters with no heatsink. IC Role / Device Role / Timing Role: Standalone LDO for USB-PD controller and communication ICs; enabled only during active charging. Use Value: 1µA shutdown current and 150°C thermal cutoff prevent overheating in sealed plastic enclosures. |
Use Scenario: Providing clean 2.5V bias for op-amps and line drivers in carrier-grade DSLAM line cards. IC Role / Device Role / Timing Role: Low-noise analog supply; decouples switching noise from upstream DC/DC converters. Use Value: 70dB PSRR at 100Hz suppresses 100kHz–500kHz switching artifacts that would otherwise degrade SNR in analog front-ends. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar adjustable-output LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP2132AKTR-G1 | 1.5A, 200mV dropout @ 1.5A (VO=3.3V), fixed 3.3V output only, no ADJ pin | Limited to single-rail systems; lacks programmability but offers lower dropout and tighter initial accuracy (±1%) | Select when fixed 3.3V output suffices and minimum dropout is prioritized over flexibility. |
| AP7173-W5-7 | 2A, 250mV dropout @ 2A (VO=3.3V), adjustable via ADJ pin, 40µVRMS noise, -40°C to +125°C rating | Higher current, wider temp range, and lower noise - suited for industrial/automotive environments | Choose for new designs needing extended temperature support, higher reliability, or future-proofing beyond PAM3116's end-of-life status. |
Compared with AP2132AKTR-G1 and AP7173-W5-7, the PAM3116BLBADJR offers proven ceramic-stability and wide adjustability but lacks extended temperature rating and has higher dropout than both alternatives - making it suitable for cost-sensitive consumer applications where its legacy footprint and known behavior are advantageous.
Availability
PAM3116BLBADJR is available at Aetrix Electronics and suitable for LCD TV power subsystems, set-top box auxiliary rails, and iPhone charger secondary regulation requiring stable component supply across production lifecycles.
Supply support for PAM3116BLBADJR 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, headquartered in Plano, Texas, with design and manufacturing operations across Asia and the Americas.
The PAM3116 belongs to Diodes' CMOS LDO regulator product line, engineered for high-current, low-noise, ceramic-capacitor-compatible power management in space-constrained consumer and communications equipment.
FAQ
What is the minimum output capacitor value required for stability?
The PAM3116BLBADJR requires a minimum 4.7µF X5R or X7R ceramic capacitor from VOUT to GND, placed within 5mm of the device. This value ensures ≥45° phase margin under all load conditions. Using smaller or non-ceramic capacitors may cause oscillation or excessive overshoot during load transients.
Can the PAM3116BLBADJR be used with an input voltage below 2.5V?
No - the absolute minimum input voltage is 2.5V per the Recommended Operating Conditions table. Below this, output regulation cannot be guaranteed due to insufficient headroom for the internal reference and error amplifier operation, even if dropout voltage appears adequate.
How does the EN pin behave during power-up sequencing?
The EN pin has 0.5µA bias current and thresholds of 1.5V (high) and 0.3V (low). It supports controlled power-up: asserting EN after VIN reaches ≥2.5V prevents inrush current spikes and ensures monotonic output ramp. No external pull-up is required, but one may be added for deterministic startup.
Is the PAM3116BLBADJR RoHS-compliant and halogen-free?
Yes - the "R" suffix in PAM3116BLBADJR denotes RoHS-compliant, lead-free, and halogen-free packaging per Diodes Incorporated's standard qualification. The SOP-8 package uses matte tin lead finish and complies with JEDEC J-STD-020 moisture sensitivity level 3 (MSL3).
PAM3116BLBADJR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Not For New Designs
- Output Configuration:
- Positive
- Output Type:
- Adjustable
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 5V
- Voltage Dropout (Max):
- 0.4V @ 1.5A
- Current - Output:
- 1.5A
- Current - Quiescent (Iq):
- 150 µA
- Current - Supply (Max):
- -
- PSRR:
- 70dB ~ 50dB (100Hz ~ 10kHz)
- Control Features:
- Enable
- Protection Features:
- Over Temperature, Short Circuit
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOP
PAM3116BLBADJR FAQ
1.How can I place an order for PAM3116BLBADJR through Aetrix?
Please submit a Request for Quotation (RFQ) for PAM3116BLBADJR 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 PAM3116BLBADJR reliable?
The price and inventory of PAM3116BLBADJR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PAM3116BLBADJR is usually 5 days.
3.What payment methods are accepted for PAM3116BLBADJR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PAM3116BLBADJR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PAM3116BLBADJR?
PAM3116BLBADJR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PAM3116BLBADJR 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 PAM3116BLBADJR?
For technical support, including PAM3116BLBADJR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PAM3116BLBADJR requirements.
6.How does Aetrix verify that PAM3116BLBADJR is sourced from the original manufacturer or authorized distributors?
All PAM3116BLBADJR 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 PAM3116BLBADJR meets industry standards.
7.What is the process for return or replacement of PAM3116BLBADJR?
All PAM3116BLBADJR units undergo pre-shipment inspection (PSI). If there is an issue with PAM3116BLBADJR, 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 PAM3116BLBADJR part is unused and in its original packaging.
Return procedure for PAM3116BLBADJR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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