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Vishay Siliconix SIP21107DT-25-E3
- Part No.:
- SIP21107DT-25-E3
- Manufacturer:
- Vishay Siliconix
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
SIP21107DT-25-E3.pdf
- Description:
- IC REG LIN 2.5V 150MA TSOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,340
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Product details
Overview
SIP21107DT-25-E3 from Vishay Siliconix is a 2.5 V fixed-output, 150 mA low-noise, low-dropout linear regulator with Power OK (POK) error flag 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. It serves as a quiet, stable power source for RF sections in portable wireless handsets.
For engineers reviewing the SIP21107DT-25-E3 datasheet, SIP21107DT-25-E3 pinout, SIP21107DT-25-E3 application, or SIP21107DT-25-E3 equivalent, key selection criteria include POK functionality, ultra-low ground current (35 µA typ. at 1 mA), shutdown current ≤1 µA, ceramic capacitor compatibility (1 µF min.), and TSOT23-5L package thermal performance.
Technical Context
The SIP21107DT-25-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. Its error amplifier compares feedback against the reference and drives the PMOS gate to maintain regulation under load transients up to 330 mA peak.
It integrates open-drain POK monitoring that asserts low when VOUT falls below 90–96 % of nominal (2.5 V), requiring an external pull-up resistor. Shutdown is controlled via EN pin (VENH ≥1.2 V, VENL ≤0.4 V), enabling auto-discharge through a 100 Ω internal NMOS during turn-off.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.5 V ±2.5 % over –40 °C to +85 °C - ensures stable core logic supply in battery-powered handhelds. |
| Dropout Voltage | 135 mV at 150 mA load - enables operation down to VIN = 2.635 V, extending usable battery range in single-cell Li-ion systems. |
| Ground Current | 35 µA typical at 1 mA load - minimizes quiescent drain during standby, critical for long sleep-mode battery life. |
| Shutdown Current | ≤1 µA maximum at 85 °C - guarantees near-zero leakage during system suspend, preserving battery charge over weeks. |
| POK Threshold | 90–96 % of VOUT (2.25–2.4 V) - provides precise under-voltage detection for host microcontroller reset or fault logging. |
| Output Noise | 350 µV(rms) (10 Hz–100 kHz) - meets noise-sensitive analog/RF supply requirements without external BP capacitor. |
| Thermal Protection | 160 °C junction shutdown with 20 °C hysteresis - prevents permanent damage during sustained overload or poor PCB heatsinking. |
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 logic: ≥1.2 V enables regulation; ≤0.4 V disables output and activates 100 Ω auto-discharge path. |
| 2 - GND | Power ground reference | Primary thermal and electrical return; must connect to large copper plane for thermal derating and noise immunity. |
| 3 - VIN | Input supply rail | Accepts 2.2–6.0 V; requires 1 µF low-ESR ceramic bypass capacitor close to pin for stability and line rejection. |
| 4 - VOUT | Regulated output | Delivers 2.5 V ±2.5 %; supports 150 mA continuous, 330 mA peak; stable with ≥1 µF ceramic output capacitor. |
| 5 - POK | Open-drain error flag | Drives low when VOUT < 90–96 % of nominal; requires external pull-up to VIN or VOUT for logic-level signaling. |
Key Features
| Feature | Design Value |
|---|---|
| No external noise bypass capacitor required | Eliminates 10 nF BP cap and associated board area/cost; simplifies layout while maintaining 350 µV(rms) noise performance. |
| Integrated Power OK (POK) flag | Provides real-time output health monitoring without external comparator circuitry; reduces BOM count and design complexity. |
| Auto-discharge on shutdown | 100 Ω internal NMOS discharges 1 µF output cap in <1 ms - prevents residual voltage from interfering with downstream sequencing or safety checks. |
| Low ground current at light load | 35 µA typical at 1 mA enables >1-year battery life in always-on sensor nodes or low-duty-cycle IoT endpoints. |
| Short-circuit and thermal protection | 330 mA current limit and 160 °C thermal shutdown prevent failure during fault conditions - eliminates need for external fusing or thermal sensors. |
Applications
| Cellular Handset RF Supply | Portable Medical Sensor |
|---|---|
Use Scenario: Powering RF front-end ICs (e.g., PA drivers, LNA, mixer) in dual-mode GSM/UMTS handsets. IC Role / Device Role / Timing Role: Low-noise, tightly regulated 2.5 V bias supply ensuring minimal phase noise and EVM degradation. Use Value: 350 µV(rms) noise and 1.0 % accuracy maintain RF signal integrity; POK enables fast fault response before transmission errors occur. | Use Scenario: Supplying analog front-end (AFE) and ADC in wearable ECG or pulse oximetry sensors. IC Role / Device Role / Timing Role: Stable, low-quiescent-power voltage source for precision analog signal conditioning. Use Value: 35 µA ground current extends coin-cell battery life; auto-discharge ensures safe power-down between measurements. |
| Wireless Modem Baseband Core | Digital Camera Image Processor |
Use Scenario: Providing clean 2.5 V supply to baseband processor cores in LTE Cat-M1 modules. IC Role / Device Role / Timing Role: Primary LDO for digital logic domain requiring tight transient response and low dropout. Use Value: 135 mV dropout sustains operation during battery sag; 70 µs turn-on time supports fast wake-from-sleep sequences. | Use Scenario: Powering image signal processor (ISP) and memory interface in compact digital still cameras. IC Role / Device Role / Timing Role: Secondary regulated rail decoupled from noisy main DC-DC converter. Use Value: Ceramic capacitor compatibility (1 µF) reduces footprint vs. tantalum; POK confirms valid supply before image capture. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-2502E/MB | 250 mA rating, 1.6 µA shutdown current, no POK pin, SC70-5 package | Lacks fault monitoring; suited for cost-sensitive, non-critical rails where POK is not required | Select when POK is unnecessary and higher output current margin is preferred |
| Torex XC6206P252MR-G | 150 mA, 1.0 µA shutdown, no POK, SOT-23-5 package, 2 % output accuracy | Lower accuracy and no status flag; suitable for general-purpose logic supply with relaxed tolerance | Select when system-level monitoring replaces POK and tighter voltage accuracy is not required |
Compared with MCP1700T-2502E/MB and XC6206P252MR-G, the SIP21107DT-25-E3 uniquely delivers integrated POK monitoring and superior 1.0 % accuracy at 25 °C-critical for RF and precision analog subsystems where undetected brownout could cause data corruption or emission violations.
Availability
SIP21107DT-25-E3 is available at Aetrix Electronics and suitable for cellular handsets, wireless modems, and portable medical sensors requiring stable component supply despite end-of-life status.
Supply support for SIP21107DT-25-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 high-performance discrete semiconductors and integrated power solutions, emphasizing reliability, efficiency, and miniaturization for demanding electronic systems.
The SiP21107 series targets portable, battery-operated devices needing ultra-low-noise, low-quiescent LDOs with integrated power-good monitoring-optimized for RF, sensor, and communication subsystems.
FAQ
What is the POK threshold voltage range for SIP21107DT-25-E3?
The SIP21107DT-25-E3 POK pin asserts low when VOUT drops below 90–96 % of its nominal 2.5 V output, corresponding to 2.25–2.4 V. This threshold is guaranteed across –40 °C to +85 °C ambient temperature and applies only when IOUT = 1 mA per datasheet specification. The POK function remains active during normal regulation and shutdown.
Does SIP21107DT-25-E3 require an external bypass capacitor?
No, the SIP21107DT-25-E3 does not require an external bypass capacitor. Unlike the SiP21106 variant, it omits the BP pin and instead integrates internal compensation to achieve 350 µV(rms) output noise (10 Hz–100 kHz) without external capacitance-reducing BOM count and PCB area.
What is the maximum continuous output current for SIP21107DT-25-E3?
The SIP21107DT-25-E3 delivers 150 mA continuously under recommended operating conditions (TA ≤ 85 °C, proper PCB thermal design). Its current limit is 330 mA typical, but continuous operation above 150 mA requires derating based on package thermal resistance (θJA = 180 °C/W for TSOT23-5L) and ambient temperature.
How does the auto-discharge feature work in SIP21107DT-25-E3?
When the EN pin is pulled low, the SIP21107DT-25-E3 enters shutdown mode and activates an internal 100 Ω NMOS discharge path from VOUT to GND. This discharges a 1 µF output capacitor in less than 1 ms, ensuring rapid and safe power-down-critical for sequencing, safety compliance, and preventing back-powering of upstream circuits.
Is SIP21107DT-25-E3 still in production?
No, SIP21107DT-25-E3 is End of Life per Vishay documentation (Last Available Purchase Date: 31-Dec-2014). However, Aetrix Electronics maintains legacy inventory and offers lifecycle support-including traceable sourcing, obsolescence mitigation planning, and cross-reference guidance-for ongoing production and repair programs.
SIP21107DT-25-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):
- 2.5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.3V @ 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-25-E3 FAQ
1.How can I place an order for SIP21107DT-25-E3 through Aetrix?
Please submit a Request for Quotation (RFQ) for SIP21107DT-25-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-25-E3 reliable?
The price and inventory of SIP21107DT-25-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-25-E3 is usually 5 days.
3.What payment methods are accepted for SIP21107DT-25-E3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SIP21107DT-25-E3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SIP21107DT-25-E3?
SIP21107DT-25-E3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SIP21107DT-25-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-25-E3?
For technical support, including SIP21107DT-25-E3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SIP21107DT-25-E3 requirements.
6.How does Aetrix verify that SIP21107DT-25-E3 is sourced from the original manufacturer or authorized distributors?
All SIP21107DT-25-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-25-E3 meets industry standards.
7.What is the process for return or replacement of SIP21107DT-25-E3?
All SIP21107DT-25-E3 units undergo pre-shipment inspection (PSI). If there is an issue with SIP21107DT-25-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-25-E3 part is unused and in its original packaging.
Return procedure for SIP21107DT-25-E3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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