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Diodes Incorporated PAM2423AECADJR
- Part No.:
- PAM2423AECADJR
- Manufacturer:
- Diodes Incorporated
- Package:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Datasheet:
-
PAM2423AECADJR.pdf
- Description:
- IC REG BOOST ADJ 5.5A 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:36,156
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Product details
Overview
PAM2423AECADJR from Diodes Incorporated is a 5.5A peak-current, 520kHz fixed-frequency current-mode PWM step-up DC-DC converter with integrated 24V power MOSFET, internal OVP, thermal shutdown, and programmable soft-start - used in TFT LCD bias supplies and DSL modem power rails.
For engineers reviewing the PAM2423AECADJR datasheet, PAM2423AECADJR pinout, PAM2423AECADJR application, or PAM2423AECADJR equivalent, key selection criteria include output voltage adjustability up to 24V, SOP-8(EP) thermal performance (θJA = 180°C/W), cycle-by-cycle current limiting, and FB regulation at 1.262V with ±0.025V tolerance.
Technical Context
The PAM2423AECADJR implements a nonsynchronous boost topology with constant-frequency PWM control and pulse-skipping mode at light loads to maintain high efficiency across operating conditions. Its current-mode architecture provides inherent line/load regulation and cycle-by-cycle overcurrent protection.
Feedback is regulated via a resistive divider referenced to a precise 1.262V FB threshold, while soft-start timing is set by an external capacitor charged at 4.5µA. The device disables automatically if FB drops below 0.2V (open-load protection) or exceeds 115% of target (OVP).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Switch Current | 5.5A - supports high-output-power boost stages without external MOSFETs |
| Switching Frequency | 520kHz - enables compact magnetics and low-output-ripple designs |
| FB Reference Voltage | 1.262V ±25mV - sets output voltage accuracy via external resistor divider |
| Input Voltage Range | 2.7V to 5.5V - compatible with single-cell Li-ion and 3.3V/5V system rails |
| OVP Threshold | 115% of regulated output - prevents overvoltage damage during feedback fault |
| Thermal Shutdown | 160°C with 40°C hysteresis - ensures safe recovery after overload or poor heatsinking |
| Soft-Start Bias Current | 4.5µA - defines linear ramp time when paired with external SS capacitor |
Pinout & Package
Package: SOP-8(EP) with exposed thermal pad connected to ground - provides θJC = 75°C/W and θJA = 180°C/W for thermally constrained PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 PGND | Power Ground | High-current return path for switch node; must be low-inductance connection to exposed pad |
| 2 IN | Supply Input | Primary input rail (2.7–5.5V); requires local 10µF ceramic bypass capacitor |
| 3 EN | Enable Control | Active-high logic input; internal 1MΩ pull-down; connect to IN if unused |
| 4 COMP | Error Amplifier Compensation | External RC network sets loop stability and transient response |
| 5 AGND | Analog Ground | Low-noise reference for FB and COMP; separate from PGND but tied at single point |
| 6 FB | Feedback Input | Senses output via resistor divider; regulated to 1.262V; max 80nA input bias |
| 7 SS | Soft-Start Control | Capacitor-connected node; 4.5µA charge current limits inrush; discharges fully in shutdown |
| 8 SW | Switch Output | Drives external inductor and Schottky diode; high dv/dt node requiring short PCB trace |
| Exposed PAD | Thermal & Electrical Ground | Must be soldered to large copper pour for thermal dissipation and EMI reduction |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 24V Power MOSFET | Eliminates need for external high-voltage switch; reduces BOM count and layout area |
| Programmable Soft-Start | Prevents input inrush and output overshoot using single external capacitor (e.g., 10nF = ~2.2ms) |
| Open-Loop Protection | Shuts down if FB < 0.2V - avoids unregulated high-voltage output during feedback disconnect |
| Under-Voltage Lockout | 2.5V turn-on threshold with 200mV hysteresis - prevents erratic operation during brownout |
| 90%+ Efficiency | Achieved at mid-to-high load with optimized external components; critical for battery runtime |
Applications
| TFT LCD Panel Bias Supply | DSL/Cable Modem Power Rail |
|---|---|
Use Scenario: Generating 12–24V bias voltages for LCD source/gate drivers in portable monitors. IC Role / Device Role / Timing Role: Primary step-up regulator delivering stable, low-noise high-voltage rail from 3.3V or 5V input. Use Value: Integrated 5.5A switch handles peak panel startup currents; OVP protects sensitive display ICs. | Use Scenario: Providing regulated 12V auxiliary supply for PHY and analog front-end circuits in broadband modems. IC Role / Device Role / Timing Role: Nonsynchronous boost converter powering isolated analog sections with minimal component count. Use Value: 520kHz switching allows small 4.7µH inductors; thermal shutdown prevents field failures under sustained load. |
| Battery-Powered Test Equipment | Set-Top Box AV Power Management |
Use Scenario: Boosting single-cell Li-ion (3.0–4.2V) to 5V/9V rails for portable oscilloscope front-ends and signal generators. IC Role / Device Role / Timing Role: High-efficiency DC-DC stage enabling >10-hour runtime on 2000mAh battery. Use Value: Pulse-skipping mode maintains >85% efficiency at 10mA load; soft-start avoids battery sag during power-on. | Use Scenario: Delivering 12V for HDMI buffer ICs and tuner modules in low-cost STB designs. IC Role / Device Role / Timing Role: Cost-optimized boost solution replacing discrete FET+controller combinations. Use Value: SOP-8(EP) package fits tight board space; internal OVP eliminates need for external crowbar circuit. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-up DC-DC converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| RT8535GJ6F | 4A peak current, 600kHz, no integrated MOSFET (external FET required) | Requires external 24V MOSFET and gate driver; higher BOM cost and layout complexity | Select when adjustable frequency or external FET optimization is needed |
| TPS61088RHLR | 12A peak current, 500kHz, integrated 24V MOSFET, but larger QFN-20 package | Higher current capability suits 5V→15V@3A applications; needs more PCB area and thermal design | Select when >5.5A output current or lower RDS(on) is required |
Compared with RT8535GJ6F and TPS61088RHLR, the PAM2423AECADJR offers optimal balance of 5.5A capability, SOP-8(EP) footprint, and full integration - making it ideal for space-constrained, medium-power boost applications where thermal management is prioritized over ultra-high current.
Availability
PAM2423AECADJR is available at Aetrix Electronics and suitable for TFT LCD bias supplies, DSL modem power rails, and battery-powered test equipment requiring stable component supply and long-term production continuity.
Supply support for PAM2423AECADJR 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, serving industrial, computing, consumer, and communications markets with high-reliability, cost-optimized components.
The PAM242x product line targets compact, high-efficiency boost conversion in space- and thermal-constrained applications - emphasizing integration, protection features, and ease of compensation.
FAQ
What is the maximum output voltage achievable with PAM2423AECADJR?
The PAM2423AECADJR supports externally adjustable output voltages up to 24V, set by a resistor divider on the FB pin. The internal 24V-rated MOSFET and OVP threshold (115% of VOUT) ensure safe operation at this maximum, provided external components (inductor, diode, capacitors) are rated accordingly.
How does the soft-start function operate, and what capacitor value is recommended?
The soft-start pin (SS) is charged at 4.5µA; a 10nF capacitor yields ~2.2ms ramp time. During startup, this limits peak inductor current until SS reaches ~1.26V, preventing input inrush and output overshoot. Leaving SS unconnected disables soft-start, allowing immediate full-current operation.
Can PAM2423AECADJR be used in synchronous rectification configurations?
No - the PAM2423AECADJR is a nonsynchronous boost converter requiring an external Schottky diode. It lacks a second MOSFET driver or synchronous control logic. For synchronous operation, consider Diodes' AP3418 or alternative controllers with dual-gate drive outputs.
What is the minimum input voltage before UVLO activates?
The under-voltage lockout (UVLO) turns off the device when VIN falls below 2.5V (rising threshold) with 200mV hysteresis, meaning the part re-enables only when VIN rises above 2.7V. This prevents unstable switching during battery discharge or supply brownouts.
PAM2423AECADJR 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
- Function:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Boost
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.7V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 2.7V
- Voltage - Output (Max):
- 24V
- Current - Output:
- 5.5A (Switch)
- Frequency - Switching:
- 520kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO-EP
PAM2423AECADJR FAQ
1.How can I place an order for PAM2423AECADJR through Aetrix?
Please submit a Request for Quotation (RFQ) for PAM2423AECADJR 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 PAM2423AECADJR reliable?
The price and inventory of PAM2423AECADJR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PAM2423AECADJR is usually 5 days.
3.What payment methods are accepted for PAM2423AECADJR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PAM2423AECADJR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PAM2423AECADJR?
PAM2423AECADJR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PAM2423AECADJR 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 PAM2423AECADJR?
For technical support, including PAM2423AECADJR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PAM2423AECADJR requirements.
6.How does Aetrix verify that PAM2423AECADJR is sourced from the original manufacturer or authorized distributors?
All PAM2423AECADJR 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 PAM2423AECADJR meets industry standards.
7.What is the process for return or replacement of PAM2423AECADJR?
All PAM2423AECADJR units undergo pre-shipment inspection (PSI). If there is an issue with PAM2423AECADJR, 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 PAM2423AECADJR part is unused and in its original packaging.
Return procedure for PAM2423AECADJR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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