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Diodes Incorporated AP1121BSL-13
- Part No.:
- AP1121BSL-13
- Manufacturer:
- Diodes Incorporated
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AP1121BSL-13.pdf
- Description:
- IC REG LIN 1.8V/3.3V 1A/1A 8SOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,190
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Product details
Overview
AP1121BSL-13 from Diodes Incorporated is a dual-channel, low-dropout positive voltage regulator delivering 1A per channel with fixed outputs of 3.3V (CH1) and 1.8V (CH2). It features ≤1.3V dropout at full load, fast transient response, independent thermal shutdown and current limiting per channel, and operates with input voltages up to 18V. It is designed for dual-rail logic supply in high-speed bus termination and low-voltage IC applications.
For engineers reviewing the AP1121BSL-13 datasheet, AP1121BSL-13 pinout, AP1121BSL-13 application, or AP1121BSL-13 equivalent, key selection factors include dual-output voltage pairing, dropout performance under 1A load, thermal behavior in SOP-8L, ripple rejection at 120Hz, and load regulation stability across temperature.
Technical Context
The AP1121BSL-13 integrates two independent LDO regulators sharing a common ground plane but with separate input and output paths. Each channel employs internal current limiting and thermal shutdown circuitry, with no shared control logic between CH1 and CH2.
Its architecture supports stable operation with 10µF output capacitors (ESR 0.15–20Ω) and accepts input supplies from 4V to 18V. The device achieves 60–70dB ripple rejection at 120Hz and maintains ±0.5% output voltage stability over temperature (0°C to +125°C junction).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage (CH1) | 3.300 V ±1.0% - Fixed, tightly regulated rail for 3.3V logic interface or I/O supply. |
| Output Voltage (CH2) | 1.800 V ±1.2% - Fixed, matched rail for 1.8V core logic or memory interface. |
| Max Dropout Voltage | 1.3 V at 1A load - Enables regulation from 3.1V input on CH2 (1.8V+1.3V), supporting wide-input industrial supplies. |
| Ripple Rejection | 60–70 dB at 120Hz - Suppresses switching noise from upstream DC/DC converters feeding the LDO inputs. |
| Thermal Resistance θJA | 158 °C/W (dual-channel active) - Requires PCB copper area ≥5.5mm×5.5mm per output for safe 1A operation at +125°C ambient. |
| Load Regulation (CH2) | 20–25 mV (0–1A) - Ensures <±0.7% output deviation during dynamic current steps in processor or FPGA core loads. |
| Quiescent Current | 5–10 mA minimum load - Guarantees regulation stability even under light-load conditions typical in standby modes. |
Pinout & Package
SOP-8L (Small Outline Package, 8-lead, 1.27mm pitch) with exposed thermal pad (not electrically connected); body dimensions 4.90 × 6.00 × 1.75 mm; RoHS-compliant lead-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VOUT1 | Channel 1 regulated output | 3.3V rail; requires ≥10µF capacitor (0.15–20Ω ESR) to ground for loop stability. |
| 2 - VOUT2 | Channel 2 regulated output | 1.8V rail; decoupling capacitor must be placed adjacent to pin to minimize trace inductance. |
| 3 - VIN1 | Channel 1 input supply | Accepts 4–18V; connect bulk capacitor (≥100µF) close to this pin to suppress input transients. |
| 4 - VIN2 | Channel 2 input supply | Independent input path enables separate filtering or sequencing vs. CH1; supports split-rail designs. |
| 5–8 - GND | Common ground terminals | Four dedicated GND pins reduce ground impedance; all must be tied to low-inductance ground plane. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent LDO channels | Enables simultaneous 3.3V/1.8V supply without cross-regulation coupling or shared failure modes. |
| Fast transient response | Sub-100µs recovery from 100mA→1A load steps - critical for burst-mode processors and DDR memory interfaces. |
| Per-channel thermal shutdown | Activates at TJ ≥150°C; latches off until cooldown - prevents thermal runaway during overload or poor heatsinking. |
| Per-channel current limit | 1.1A foldback threshold - protects external circuitry and PCB traces during short-circuit or startup surge events. |
| High PSRR at low frequency | 60–70dB at 120Hz - effectively filters ripple from AC/DC adapters or buck converter switching artifacts. |
Applications
| PCIe Add-in Card Power | FPGA I/O Bank Supply |
|---|---|
Use Scenario: Providing clean, sequenced 3.3V and 1.8V rails to PCIe endpoint devices with strict voltage tolerance and fast load-step response. IC Role / Device Role / Timing Role: Dual-rail LDO regulator supplying interface I/O banks and configuration logic independently. Use Value: Eliminates need for two discrete regulators and associated layout complexity while maintaining channel isolation and fault containment. |
Use Scenario: Powering mixed-voltage I/O banks on Xilinx or Intel FPGAs where bank-specific VCCIO must be 3.3V or 1.8V with tight regulation. IC Role / Device Role / Timing Role: Dedicated dual-output voltage source ensuring simultaneous rail availability and minimal cross-talk during I/O switching. Use Value: Reduces BOM count and PCB area versus discrete solutions while meeting FPGA VCCIO accuracy (±3%) and load-transient specs. |
| Industrial PLC Digital I/O Module | Embedded Camera Interface Board |
Use Scenario: Delivering isolated 3.3V logic and 1.8V sensor interface power in DIN-rail mounted controllers with wide ambient temperature range. IC Role / Device Role / Timing Role: Primary local regulator converting 12V/24V system rail to dual low-noise digital supplies. Use Value: Maintains regulation down to 3.1V input on 1.8V rail, enabling operation during brownout conditions common in factory environments. |
Use Scenario: Supplying MIPI CSI-2 camera sensor and serializer ICs requiring tightly coupled 3.3V and 1.8V rails with low noise and fast transient immunity. IC Role / Device Role / Timing Role: Low-noise dual LDO providing power to image sensor analog front-end and digital interface logic. Use Value: 70dB ripple rejection suppresses switching noise that would otherwise manifest as image banding or timing jitter in pixel data streams. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS7A8300RGRT | Single-channel, 3A, adjustable output; higher IQ (2.5mA), lower dropout (0.25V @ 3A); no dual-fixed option. | Requires external resistors and second regulator for 1.8V rail; better suited for high-current single-rail systems. | Select when >1A per rail is needed or adjustable output is required; not drop-in for AP1121BSL-13's dual-fixed function. |
| RT9013-33GJ5 | Single-channel, 300mA, fixed 3.3V; no 1.8V channel; smaller SOT-25 package; lower cost but lower current capability. | Only provides one rail; insufficient for dual-rail applications unless paired with another regulator. | Use only for space-constrained 3.3V-only applications; cannot replace AP1121BSL-13's dual-output functionality. |
Compared with TPS7A8300RGRT and RT9013-33GJ5, AP1121BSL-13 uniquely delivers matched 3.3V/1.8V outputs at 1A each in a single SOP-8L package with integrated protection-making it optimal for compact dual-rail embedded systems where board space and BOM simplification are critical.
Availability
AP1121BSL-13 is available at Aetrix Electronics and suitable for PCIe add-in cards, FPGA I/O modules, and industrial PLC digital I/O requiring stable component supply with dual fixed-voltage regulation and thermal robustness.
Supply support for AP1121BSL-13 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 industrial, computing, and communications markets.
The AP1121 series belongs to Diodes' precision dual-LDO product line, engineered specifically for high-speed digital systems needing tightly regulated, low-noise, dual-rail supplies with built-in fault protection and minimal external components.
FAQ
What are the exact output voltages and tolerances for AP1121BSL-13?
The AP1121BSL-13 delivers 3.300 V ±1.0% on Channel 1 and 1.800 V ±1.2% on Channel 2, measured at 10mA load and 25°C ambient. Output voltage remains within these limits across 0–1A load and 0°C to +125°C junction temperature, as verified in DS31011 Rev. 6–4 Table 1.
Can AP1121BSL-13 operate with a 12V input supplying both channels simultaneously?
Yes - the device supports input voltages from 4V to 18V on each VIN pin. At 12V input, the 1.8V channel sustains 1A load with 10.2V headroom, well above its 1.3V dropout requirement; thermal design must accommodate ~10.2W total dissipation using the specified 5.5mm×5.5mm copper area per channel.
Is the SOP-8L package thermally enhanced, and how should it be mounted?
The SOP-8L package has no internal thermal pad; thermal performance relies entirely on PCB copper area. Diodes specifies a minimum 5.5mm×5.5mm copper pour per output (VOUT1/VOUT2) connected via multiple vias to inner-layer ground planes. Larger copper (e.g., 10mm×10mm) reduces θJA to improve power handling.
Does AP1121BSL-13 support power sequencing between channels?
No - the AP1121BSL-13 has no enable pins, sequencing control, or power-good indicators. Both channels power up simultaneously with input voltage. For controlled sequencing, external MOSFETs or dedicated supervisors (e.g., TPS3808) must be added to VIN1/VIN2 paths.
AP1121BSL-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 2
- Voltage - Input (Max):
- 18V
- Voltage - Output (Min/Fixed):
- 1.8V, 3.3V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 1.4V @ 1A, 1.4V @ 1A
- Current - Output:
- 1A, 1A
- Current - Quiescent (Iq):
- 10 mA
- Current - Supply (Max):
- -
- PSRR:
- 60dB (120Hz)
- Control Features:
- -
- Protection Features:
- Over Current, Over Temperature
- Operating Temperature:
- 0°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOP
AP1121BSL-13 FAQ
1.How can I place an order for AP1121BSL-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP1121BSL-13 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 AP1121BSL-13 reliable?
The price and inventory of AP1121BSL-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP1121BSL-13 is usually 5 days.
3.What payment methods are accepted for AP1121BSL-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP1121BSL-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP1121BSL-13?
AP1121BSL-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP1121BSL-13 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 AP1121BSL-13?
For technical support, including AP1121BSL-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP1121BSL-13 requirements.
6.How does Aetrix verify that AP1121BSL-13 is sourced from the original manufacturer or authorized distributors?
All AP1121BSL-13 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 AP1121BSL-13 meets industry standards.
7.What is the process for return or replacement of AP1121BSL-13?
All AP1121BSL-13 units undergo pre-shipment inspection (PSI). If there is an issue with AP1121BSL-13, 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 AP1121BSL-13 part is unused and in its original packaging.
Return procedure for AP1121BSL-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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