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Diodes Incorporated AP2553AFDC-7
- Part No.:
- AP2553AFDC-7
- Manufacturer:
- Diodes Incorporated
- Package:
- 6-UDFN Exposed Pad
- Datasheet:
-
AP2553AFDC-7.pdf
- Description:
- IC PWR SWITCH P-CHANNEL 1:1 6DFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,640
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Product details
Overview
AP2553AFDC-7 from Diodes Incorporated is a single-channel, active-high enable, precision adjustable current-limited high-side power switch in U-DFN2020-6 (Type C) package. It delivers up to 2.1A continuous load current, supports programmable current-limit threshold from 75mA to 2.36A (typ.) via external resistor (RLIM = 10kΩ–210kΩ), achieves ±6% accuracy at 1.632A (RLIM = 15kΩ), and features fast 2µs short-circuit response - optimized for USB-compliant hot-swap power delivery in LCD TVs and residential gateways.
For engineers reviewing the AP2553AFDC-7 datasheet, AP2553AFDC-7 pinout, AP2553AFDC-7 application, or AP2553AFDC-7 equivalent, key selection considerations include its latch-off fault behavior under over-current/reverse-voltage, reverse-current blocking during shutdown, 7ms FAULT deglitching, controlled 1.1ms rise time, and thermal shutdown at +160°C - all critical for robust USB port protection and capacitive-load management.
Technical Context
The AP2553AFDC-7 integrates a precision current-sense FET and slew-rate-controlled gate driver to enforce constant-current limiting during overload while avoiding external sense resistors. Its internal UVLO (~2.5V) ensures safe hot-plug operation, and reverse-voltage comparator (trip at 95–190mV) triggers immediate MOSFET turn-off within 3–7ms for reverse-current protection.
Unlike the constant-current AP2553, the "A" variant implements latch-off behavior: upon over-current detection, it clamps current then disables output after 7ms deglitch timeout and remains latched until EN toggle or power cycle. Fault reporting uses an open-drain FAULT pin with 5–10ms blanking time to suppress false triggers during transient surges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Current Limit Range | 75mA–2365mA (typ.), set by external RLIM (10kΩ–210kΩ); enables precise USB port current budgeting. |
| Current Limit Accuracy | ±6% at 1.632A (RLIM = 15kΩ); ensures predictable trip margin without calibration. |
| Short-Circuit Response | 2µs (typ.); limits energy dissipation during hard shorts to protect downstream circuitry. |
| Enable Logic | Active High (EN); simplifies interface with 3.3V/5V microcontroller GPIO without level-shifting. |
| Thermal Shutdown | +160°C (normal mode), +140°C (under current limit); prevents permanent damage during sustained overload. |
| RDS(ON) | 80–105mΩ (typ., U-DFN2020-6, TJ = +25°C); minimizes conduction loss and self-heating at 2.1A. |
| Input Voltage Range | 2.7V–5.5V; compatible with USB 2.0/3.0 VBUS and industrial 3.3V/5V rails. |
Pinout & Package
AP2553AFDC-7 is housed in a 2.0mm × 2.0mm, 0.65mm pitch U-DFN2020-6 (Type C) package with exposed thermal pad (recommended to connect to GND for improved power dissipation).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN (Pin 6) | Power Input | Connects to 2.7–5.5V supply; requires ≥0.1µF ceramic decoupling capacitor placed adjacent to pin. |
| GND (Pin 5) | Ground Reference | Primary ground return; must be connected to PCB ground plane and exposed thermal pad. |
| EN (Pin 4) | Enable Control | Active-High logic input; drives internal driver when pulled ≥2.0V (VIH), disables switch when ≤0.8V (VIL). |
| FAULT (Pin 3) | Fault Reporting | Open-drain, active-low output asserted during over-current, over-temperature, or reverse-voltage events; includes 5–10ms blanking. |
| ILIM (Pin 2) | Current-Limit Programming | Connects external resistor (10kΩ–210kΩ) to set precise current-limit threshold; sensitive to layout parasitics. |
| OUT (Pin 1) | Switched Output | High-side switched output delivering up to 2.1A; provides reverse-current blocking when disabled. |
Key Features
| Feature | Design Value |
|---|---|
| Latch-Off Fault Response | Disables output permanently after 7ms deglitched over-current event; requires EN toggle or power cycle to reset - prevents uncontrolled restart during persistent faults. |
| Reverse Current Blocking & Limiting | Blocks reverse current flow when disabled; actively limits reverse current to 0.72A (at 200mV reverse bias) when enabled - protects upstream supplies from backfeed. |
| Controlled Soft-Start | Typical 1.1ms output rise time (VIN = 5.5V, CL = 1µF); eliminates inrush current spikes into large capacitive loads like USB ports. |
| Integrated Thermal Protection | Shuts down at +160°C junction temperature with +20°C hysteresis; recovers automatically after cooling - no external thermal sensor needed. |
| Robust ESD Immunity | 15kV IEC 61000-4-2 system-level ESD (with external capacitance); 2kV HBM, 500V CDM - suitable for consumer-facing USB interfaces. |
Applications
| USB 3.0 Port Protection | LCD TV Power Management |
|---|---|
|
Use Scenario: Protecting individual USB 3.0 downstream ports against short circuits, hot-plug inrush, and reverse-current backfeed from peripherals. IC Role / Device Role / Timing Role: High-side power switch with latch-off fault handling and 7ms deglitched FAULT reporting - acts as primary over-current barrier before USB controller. Use Value: Prevents host controller damage and bus voltage droop during cable shorts; meets USB-IF compliance requirements for current limiting and recovery behavior. |
Use Scenario: Supplying regulated 5V power to HDMI receiver ICs, backlight drivers, and tuner modules in LCD TVs with strict inrush and fault containment needs. IC Role / Device Role / Timing Role: Precision current-limited power rail switch enabling independent domain power control and thermal-safe fault isolation. Use Value: Enables per-module power sequencing and prevents single-point failure from propagating across multiple subsystems during capacitor charging or ESD events. |
| Residential Gateway Power Distribution | Desktop Docking Station Load Switching |
|
Use Scenario: Managing power to Ethernet PHYs, Wi-Fi radios, and USB hubs in home gateways where space-constrained layout demands minimal BOM count. IC Role / Device Role / Timing Role: Single-chip solution combining current limiting, reverse-current blocking, UVLO, and thermal shutdown - replaces discrete protection circuits. Use Value: Reduces PCB area by >40% vs. discrete MOSFET + sense resistor + comparator design; improves reliability with integrated deglitching and latch-off. |
Use Scenario: Enabling/disabling 5V/12V rails to external monitors, storage devices, and peripherals in multi-port docking stations with mixed load profiles. IC Role / Device Role / Timing Role: Programmable high-side switch allowing dynamic current-limit configuration per port (e.g., 900mA for USB-A, 1.5A for USB-C). Use Value: Supports flexible power allocation without redesign; ±6% current-limit accuracy ensures consistent compliance across production units. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-side current-limited power switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP22653FDC-7 | Same U-DFN2020-6 package, active-high EN, but fixed 1.5A current limit (non-adjustable); lower RDS(ON) (65mΩ typ.) and faster 1.5µs short-circuit response. | Lacks programmability; suited for cost-sensitive designs where fixed current limit suffices and tighter tolerance isn't required. | Select when design prioritizes lower conduction loss and simpler BOM over adjustable current thresholds. |
| TPS22965DSGT | Texas Instruments part in 2.0mm × 2.0mm WSON-6; adjustable current limit (100mA–2.5A), but uses different FAULT timing (no deglitch), higher quiescent current (25µA vs. 80–140µA), and no reverse-current limiting. | Requires external RC network for FAULT debouncing; lacks reverse-voltage protection - needs supplemental circuitry for full USB compliance. | Choose only if TI ecosystem alignment or specific timing specs override need for integrated reverse-current blocking and deglitched FAULT. |
Compared with AP22653FDC-7, AP2553AFDC-7 trades fixed current simplicity for field-programmable protection thresholds and integrated reverse-current limiting; versus TPS22965DSGT, it delivers superior fault robustness with built-in deglitching and reverse-voltage response - critical for unattended consumer electronics.
Availability
AP2553AFDC-7 is available at Aetrix Electronics and suitable for USB 3.0 port protection, LCD TV power management, residential gateway distribution, and desktop docking station load switching requiring stable component supply, long-term lifecycle support, and RoHS-compliant green packaging.
Supply support for AP2553AFDC-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 high-reliability power management, signal integrity, and protection solutions for consumer, industrial, and computing markets.
The AP255x family targets USB-compliant hot-swap power distribution, delivering integrated current limiting, reverse-current blocking, thermal protection, and fault reporting in ultra-compact packages - designed specifically for space-constrained, high-density power rail management.
FAQ
What is the function of the ILIM pin on AP2553AFDC-7?
The ILIM pin sources a precision reference current used to program the output current-limit threshold via an external resistor (RLIM). With RLIM values from 10kΩ to 210kΩ, it sets the trip point between 75mA and 2.36A (typ.). Layout must minimize trace length and parasitic capacitance to maintain ±6% accuracy at high settings like 1.632A (RLIM = 15kΩ).
How does the latch-off behavior differ from constant-current limiting in AP2553AFDC-7?
AP2553AFDC-7 implements latch-off: upon over-current detection, it clamps current briefly then disables the output after 7ms deglitch timeout and remains off until EN is toggled or VIN is cycled. In contrast, non-"A" variants (e.g., AP2553) maintain constant-current limiting indefinitely unless thermal shutdown occurs - making AP2553AFDC-7 safer for persistent fault conditions.
Can AP2553AFDC-7 be used in automotive applications?
AP2553AFDC-7 is not AEC-Q100 qualified and is specified for -40°C to +85°C ambient operation. While it meets industrial reliability standards (UL Recognized, IEC 60950-1 CB certified), Diodes Incorporated explicitly states that automotive-grade versions require separate qualification - contact their automotive team for PPAP-capable, IATF 16949-manufactured alternatives.
What is the purpose of the exposed thermal pad on the U-DFN2020-6 package?
The exposed thermal pad on AP2553AFDC-7's U-DFN2020-6 package must be soldered to a PCB copper pour connected to GND to enhance thermal dissipation. It reduces θJA from 120°C/W to ~34°C/W (θJC), enabling reliable 2.1A operation at +85°C ambient. It is not an electrical ground path - avoid routing signal traces beneath it and ensure solder coverage ≥90% for optimal performance.
AP2553AFDC-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- 6-UDFN Exposed Pad
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Switch Type:
- General Purpose
- Number of Outputs:
- 1
- Ratio - Input:Output:
- 1:1
- Output Configuration:
- High Side
- Output Type:
- P-Channel
- Interface:
- On/Off
- Voltage - Load:
- 2.7V ~ 5.5V
- Voltage - Supply (Vcc/Vdd):
- Not Required
- Current - Output (Max):
- 2.1A
- Rds On (Typ):
- 80mOhm
- Input Type:
- Non-Inverting
- Features:
- Load Discharge, Status Flag
- Fault Protection:
- Current Limiting (Adjustable), Over Temperature, Reverse Current, UVLO
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- U-DFN2020-6 (Type C)
AP2553AFDC-7 FAQ
1.How can I place an order for AP2553AFDC-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP2553AFDC-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 AP2553AFDC-7 reliable?
The price and inventory of AP2553AFDC-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP2553AFDC-7 is usually 5 days.
3.What payment methods are accepted for AP2553AFDC-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP2553AFDC-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP2553AFDC-7?
AP2553AFDC-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP2553AFDC-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 AP2553AFDC-7?
For technical support, including AP2553AFDC-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP2553AFDC-7 requirements.
6.How does Aetrix verify that AP2553AFDC-7 is sourced from the original manufacturer or authorized distributors?
All AP2553AFDC-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 AP2553AFDC-7 meets industry standards.
7.What is the process for return or replacement of AP2553AFDC-7?
All AP2553AFDC-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP2553AFDC-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 AP2553AFDC-7 part is unused and in its original packaging.
Return procedure for AP2553AFDC-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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