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Vishay Siliconix SIP21107DT-28-E3
- Part No.:
- SIP21107DT-28-E3
- Manufacturer:
- Vishay Siliconix
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
SIP21107DT-28-E3.pdf
- Description:
- IC REG LIN 2.8V 150MA TSOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,391
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Product details
Overview
SIP21107DT-28-E3 from Vishay Siliconix is a 2.8 V fixed-output, 150 mA low-noise, low-dropout linear regulator with Power-OK (POK) error flag output and no external bypass capacitor requirement. It features 135 mV dropout at 150 mA, 1.0 % output voltage accuracy at 25 °C, and operates across –40 °C to +85 °C ambient temperature. It serves as a stable, quiet power source for RF sections in portable wireless handsets.
For engineers reviewing the SIP21107DT-28-E3 datasheet, SIP21107DT-28-E3 pinout, SIP21107DT-28-E3 application, or SIP21107DT-28-E3 equivalent, key selection criteria include POK functionality, ultra-low ground current (35 µA typ. at 1 mA), shutdown current ≤1 µA, auto-discharge resistance (100 Ω), and compatibility with 1 µF ceramic output capacitors.
Technical Context
The SIP21107DT-28-E3 uses an internal P-channel MOSFET pass transistor (0.9 Ω typical RDS(on)) and a 1.2 V bandgap reference to regulate output voltage. Its error amplifier compares feedback against the reference and drives the pass gate to maintain regulation under load transients up to 330 mA peak.
POK functionality is implemented via an open-drain NMOS comparator monitoring VOUT; it asserts low when output falls below 90–96 % of nominal (e.g., <2.52 V for 2.8 V output), with 1.5 % hysteresis and 40 µs delay. The EN pin enables/disables regulation with 1.2 V high threshold and 0.4 V low threshold.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.8 V ±2.5 % over –40 °C to +85 °C - ensures stable core logic or RF bias supply without external resistors. |
| Dropout Voltage | 135 mV at 150 mA load - enables operation from 2.93 V input, extending battery runtime in single-cell Li-ion or alkaline systems. |
| Ground Current | 35 µA typical at 1 mA load - minimizes quiescent drain during light-load standby in always-on subsystems. |
| Shutdown Current | ≤1 µA at 85 °C - preserves battery charge during deep sleep modes in portable devices. |
| Output Noise | 350 µVrms (10 Hz–100 kHz) - meets noise-sensitive analog/RF supply requirements without BP capacitor. |
| POK Threshold | 90–96 % of VOUT with 1.5 % hysteresis - provides reliable power-good signaling for system sequencing and fault detection. |
| Auto-Discharge | 100 Ω NMOS pull-down (EN = 0 V) - discharges 1 µF output cap in <1 ms, preventing residual voltage hold-up. |
Pinout & Package
TSOT23-5L package (3.05 mm × 2.85 mm × 1.0 mm), RoHS-compliant, rated for –40 °C to +85 °C ambient operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - EN | Enable control input | Active-high digital enable; <0.4 V disables regulator and activates auto-discharge; connect to VIN if unused. |
| 2 - GND | Power ground reference | Primary thermal path; must connect directly to large PCB ground plane for thermal management and noise reduction. |
| 3 - VIN | Input supply | Accepts 2.2–6.0 V; requires ≥1 µF low-ESR ceramic bypass capacitor to suppress input ripple and improve PSRR. |
| 4 - POK | Open-drain error flag | Asserts low on under-voltage, over-current, or thermal fault; requires external pull-up to VIN or VOUT for logic-level interface. |
| 5 - VOUT | Regulated output | Delivers 2.8 V at up to 150 mA; stable with ≥1 µF ceramic output capacitor; supports fast load transient response. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated POK output | Eliminates need for external supervisor IC in power sequencing circuits; reduces BOM count and board area. |
| No BP capacitor required | Reduces component count and layout complexity versus SiP21106; simplifies design for space-constrained portable applications. |
| 100 Ω auto-discharge | Ensures rapid output collapse during shutdown, preventing unintended wake-up or latch-up in downstream circuitry. |
| Thermal and short-circuit protection | Shuts down at ~160 °C junction temperature and limits output current to 330 mA typical, enabling robust operation in unregulated environments. |
| Ultra-thin TSOT23-5L package | Enables high-density placement in slim handheld form factors while maintaining adequate thermal dissipation (θJA = 180 °C/W). |
Applications
| Cellular Radio Front-End | Portable Audio Codec Supply |
|---|---|
Use Scenario: Powering RF transceiver LNA and mixer stages in GSM/UMTS handsets. IC Role / Device Role / Timing Role: Low-noise 2.8 V bias rail with POK confirmation before RF activation. Use Value: 350 µVrms noise avoids degradation of receiver sensitivity; POK prevents transmission until stable voltage is confirmed. | Use Scenario: Supplying analog section of stereo audio codec in MP3 players. IC Role / Device Role / Timing Role: Clean, regulated 2.8 V source decoupled from noisy digital rails. Use Value: Eliminates need for external noise filter components; auto-discharge prevents pop/click during playback stop. |
| Digital Camera Image Sensor Bias | Wireless Modem Baseband Core |
Use Scenario: Providing stable bias to CMOS image sensor analog front-end during capture bursts. IC Role / Device Role / Timing Role: Fast-starting LDO delivering 2.8 V with <70 µs turn-on time and 330 mA peak capability. Use Value: Supports rapid sensor wake-up and exposure control; POK signals readiness to baseband processor. | Use Scenario: Powering 2.8 V I/O and core logic in embedded LTE/Wi-Fi modems. IC Role / Device Role / Timing Role: Primary regulated supply with fault reporting for system health monitoring. Use Value: POK integration replaces discrete voltage monitor; 1 µA shutdown current extends modem sleep duration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-2802E/TT | 250 mA output, 1.6 µA quiescent current, no POK pin, SC70-5 package | Lacks power-good signaling; suited for non-critical bias rails where sequencing is handled externally | Select when lowest IQ is critical and POK is unnecessary; verify thermal derating for 150 mA continuous load in SC70. |
| Torex XC6206P282MR-G | 150 mA output, 3 µA IQ, no POK, SOT-23-5 package, 2 % initial accuracy | Higher output tolerance and no fault indication; lower cost but reduced system-level reliability assurance | Choose for cost-sensitive consumer applications where POK is omitted from system architecture. |
Compared with MCP1700T-2802E/TT and XC6206P282MR-G, the SIP21107DT-28-E3 uniquely delivers integrated POK functionality with 1.0 % accuracy and 350 µVrms noise-enabling simpler, more robust power sequencing in RF and imaging subsystems without adding external supervision circuitry.
Availability
SIP21107DT-28-E3 is available at Aetrix Electronics and suitable for cellular handsets, digital cameras, and wireless modems requiring stable component supply despite its End-of-Life status per Vishay's last purchase date of 31-Dec-2014.
Supply support for SIP21107DT-28-E3 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
Vishay Siliconix designs and manufactures high-performance discrete semiconductors and integrated power solutions, emphasizing reliability, miniaturization, and efficiency for demanding electronic systems.
The SiP21107 series belongs to Vishay's low-noise, low-IQ LDO family engineered specifically for battery-powered portable electronics where power integrity, compact packaging, and integrated fault signaling are essential.
FAQ
What is the maximum input voltage rating for the SIP21107DT-28-E3?
The SIP21107DT-28-E3 has an absolute maximum input voltage of 6.5 V relative to GND. Operation is recommended within 2.2 V to 6.0 V per specifications. Exceeding 6.5 V risks permanent damage, and sustained operation above 6.0 V may degrade long-term reliability even if within absolute ratings.
Does the SIP21107DT-28-E3 require an external bypass capacitor on the BP pin?
No-the SIP21107DT-28-E3 does not require a bypass capacitor on the BP/POK pin. Unlike the SiP21106 variant, the SiP21107 integrates internal noise filtering and eliminates the need for an external 10 nF capacitor, simplifying layout and reducing component count.
How does the POK pin function on the SIP21107DT-28-E3?
The POK pin on the SIP21107DT-28-E3 is an open-drain NMOS output that goes low when VOUT drops below 90–96 % of nominal (e.g., <2.52 V for 2.8 V). It requires an external pull-up resistor to VIN or VOUT and asserts within 40 µs of fault onset, providing real-time power-good monitoring for system sequencing.
What is the thermal shutdown behavior of the SIP21107DT-28-E3?
The SIP21107DT-28-E3 activates thermal shutdown at approximately 160 °C junction temperature and exhibits ~20 °C hysteresis. When triggered, the P-channel pass transistor turns off, allowing cooling; it resumes regulation once junction temperature falls below ~140 °C, resulting in pulsed output under sustained overload.
Can the SIP21107DT-28-E3 be used with ceramic output capacitors smaller than 1 µF?
No-stable operation of the SIP21107DT-28-E3 requires a minimum 1 µF ceramic output capacitor (6 nF/mA rule yields ~1 µF at 150 mA). Using smaller values risks instability, excessive ringing, or poor load-transient response; X7R or Y7R dielectrics are recommended for temperature stability.
SIP21107DT-28-E3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay Siliconix
- Series:
- -
- Package/Case:
- SOT-23-5 Thin, TSOT-23-5
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 2.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.22V @ 150mA
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- 85 µA
- Current - Supply (Max):
- -
- PSRR:
- 72dB ~ 38dB (1kHz ~ 100kHz)
- Control Features:
- Enable, Power Good
- Protection Features:
- Over Temperature, Short Circuit
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-5
SIP21107DT-28-E3 FAQ
1.How can I place an order for SIP21107DT-28-E3 through Aetrix?
Please submit a Request for Quotation (RFQ) for SIP21107DT-28-E3 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 SIP21107DT-28-E3 reliable?
The price and inventory of SIP21107DT-28-E3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SIP21107DT-28-E3 is usually 5 days.
3.What payment methods are accepted for SIP21107DT-28-E3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SIP21107DT-28-E3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SIP21107DT-28-E3?
SIP21107DT-28-E3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SIP21107DT-28-E3 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 SIP21107DT-28-E3?
For technical support, including SIP21107DT-28-E3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SIP21107DT-28-E3 requirements.
6.How does Aetrix verify that SIP21107DT-28-E3 is sourced from the original manufacturer or authorized distributors?
All SIP21107DT-28-E3 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 SIP21107DT-28-E3 meets industry standards.
7.What is the process for return or replacement of SIP21107DT-28-E3?
All SIP21107DT-28-E3 units undergo pre-shipment inspection (PSI). If there is an issue with SIP21107DT-28-E3, 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 SIP21107DT-28-E3 part is unused and in its original packaging.
Return procedure for SIP21107DT-28-E3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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