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Vishay Siliconix SIP21107DT-12-E3
- Part No.:
- SIP21107DT-12-E3
- Manufacturer:
- Vishay Siliconix
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
SIP21107DT-12-E3.pdf
- Description:
- IC REG LIN 1.2V 150MA TSOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,677
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Product details
Overview
SIP21107DT-12-E3 from Vishay Siliconix is a 150-mA, low-noise, low-dropout linear regulator with fixed 1.2 V output, integrated Power-OK (POK) error flag, and 135 mV dropout at full load. It uses a P-channel MOSFET pass element, operates from 2.2 V to 6 V input, and delivers ±2.5 % output accuracy over –40 °C to +85 °C ambient for portable RF power rails.
For engineers reviewing the SIP21107DT-12-E3 datasheet, SIP21107DT-12-E3 pinout, SIP21107DT-12-E3 application, or SIP21107DT-12-E3 equivalent, key selection criteria include POK threshold behavior (90–96 % of VOUT), auto-discharge resistance (100 Ω), shutdown current (<1 µA), compatibility with 1 µF ceramic output capacitors, and TSOT23-5L package thermal limits (5.5 mW/°C derating above 70 °C).
Technical Context
The SIP21107DT-12-E3 implements a BiCMOS architecture with a 1.2 V bandgap reference and error amplifier driving a 0.9 Ω typical P-channel MOSFET pass transistor. Its POK comparator monitors VOUT relative to VIN and asserts an open-drain low signal when output falls below 90–96 % of nominal voltage, requiring an external pull-up resistor.
Startup includes active pull-down for improved transient response; shutdown mode enables automatic output discharge via a 100 Ω NMOS path while limiting supply current to ≤1 µA at 85 °C. The device maintains regulation up to 330 mA peak current and integrates thermal shutdown (160 °C) and short-circuit protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.2 V ±2.5 % over –40 °C to +85 °C - ensures stable core logic or sensor biasing without external resistors. |
| Dropout Voltage | 135 mV at 150 mA load - enables operation down to VIN = 1.335 V, extending battery runtime in single-cell Li-ion or NiMH systems. |
| POK Threshold | 90–96 % of VOUT (rising edge) - provides precise under-voltage detection for system reset or fault logging in noise-sensitive applications. |
| Ground Current | 35 µA typical at 1 mA load - minimizes quiescent drain during light-load standby in always-on subsystems. |
| Shutdown Current | ≤1 µA maximum at 85 °C - supports ultra-low-power sleep modes in portable electronics with long shelf life requirements. |
| Auto-Discharge Resistance | 100 Ω typical - discharges 1 µF output capacitor in <1 ms upon EN deactivation, preventing residual voltage hold-up. |
| Thermal Shutdown | 160 °C junction temperature with 20 °C hysteresis - protects against sustained overload or poor PCB heatsinking without latch-up. |
Pinout & Package
TSOT23-5L package (3.05 mm × 2.85 mm × 1.0 mm); RoHS-compliant, Pb-free; 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 auto-discharge. |
| 2 - GND | Power ground reference | Primary thermal and electrical return path; must connect to large copper plane for thermal derating compliance. |
| 3 - VIN | Input supply connection | Accepts 2.2–6 V; requires 1 µF ceramic bypass capacitor close to pin to ensure stability and line-transient immunity. |
| 4 - VOUT | Regulated output node | Delivers 1.2 V ±2.5 %; supports 1 µF ceramic output capacitor; drives loads up to 150 mA continuous. |
| 5 - POK | Open-drain error flag | Asserts low when VOUT drops below POK threshold; requires external pull-up to VIN or VOUT for proper logic-level signaling. |
Key Features
| Feature | Design Value |
|---|---|
| Noise-bypass capacitor not required | Eliminates need for external BP capacitor - simplifies BOM and layout versus SiP21106, reducing component count by one. |
| Integrated POK error flag | Provides system-level power-good monitoring without external comparators or voltage dividers - enables deterministic reset sequencing. |
| Auto-discharge on shutdown | 100 Ω internal NMOS discharges output capacitance rapidly - prevents unintended wake-up or latch-up in multi-rail systems. |
| Stable with 1 µF ceramic output cap | Enables use of small, low-cost, high-reliability MLCCs instead of larger tantalum or electrolytic types - saves board space and improves MTBF. |
| P-channel MOSFET pass element | Zero gate-drive current eliminates base-current losses of PNP designs - sustains low ground current across full load range. |
Applications
| Cellular Baseband Power | Wireless Modem Core Supply |
|---|---|
Use Scenario: Powers baseband processor I/O and memory interfaces in GSM/UMTS handsets where supply ripple must remain below 50 µV to avoid bit errors. IC Role / Device Role / Timing Role: Low-noise LDO providing clean 1.2 V rail with POK confirmation before processor boot sequence initiates. Use Value: POK assertion guarantees VOUT is within ±2.5 % tolerance before enabling clock distribution, eliminating invalid startup states. | Use Scenario: Supplies 1.2 V core voltage to LTE modem SoC during burst transmission, where rapid load transients occur every 10 ms. IC Role / Device Role / Timing Role: Regulator with 135 mV dropout and 330 mA peak current capability maintains regulation during RF PA turn-on surges. Use Value: Active pull-down circuit improves transient response time to <50 µs, preventing brownout-induced packet loss. |
| Digital Camera Sensor Bias | Portable Medical Diagnostic Module |
Use Scenario: Provides precision 1.2 V bias to CMOS image sensor analog front-end, where PSRR >70 dB at 1 kHz suppresses switching noise from adjacent DC/DC converters. IC Role / Device Role / Timing Role: Low-noise LDO with 72 dB PSRR at 1 kHz and no external BP cap - simplifies layout near noise-sensitive analog blocks. Use Value: Eliminates 10 nF BP capacitor and associated parasitic resonance risk, improving yield in high-density camera modules. | Use Scenario: Powers ADC reference buffer and low-power microcontroller in handheld ECG monitor operating from coin-cell battery for >1 year. IC Role / Device Role / Timing Role: Ultra-low-quiescent LDO with ≤1 µA shutdown current and auto-discharge - extends battery life and ensures safe power-down state. Use Value: 35 µA ground current at 1 mA load and 100 Ω discharge path reduce total system standby power by >40 % vs. legacy solutions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-1202E/TT | 150 mA max, 600 mV dropout at 150 mA, no POK pin, 4 µA quiescent current | Lacks power-good monitoring; requires external supervisor IC for reset generation | Choose when POK functionality is unnecessary and lowest quiescent current is critical. |
| TCS21107DVP-12-E3 | Same family, TSC75-6L package (1.6 mm × 1.6 mm), 7.6 mW/°C thermal derating, NC pin present | Smaller footprint but higher thermal resistance (131 °C/W vs. 180 °C/W); NC pin adds routing constraint | Choose when board area is constrained and thermal margin allows tighter derating. |
Compared with MCP1700T-1202E/TT and TCS21107DVP-12-E3, SIP21107DT-12-E3 uniquely integrates POK with tight 90–96 % threshold and matches TSOT23-5L thermal performance at lower cost than TSC75-6L, making it optimal for space-constrained, POK-dependent portable designs.
Availability
SIP21107DT-12-E3 is available at Aetrix Electronics and suitable for cellular handsets, wireless modems, digital cameras, and portable medical diagnostics requiring stable component supply despite end-of-life status.
Supply support for SIP21107DT-12-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 SiP2110x series targets battery-powered portable electronics needing ultra-low-noise, low-dropout regulation with integrated supervision - specifically engineered for RF, imaging, and medical subsystems where power integrity is mission-critical.
FAQ
What is the POK threshold behavior of SIP21107DT-12-E3?
The SIP21107DT-12-E3 POK pin asserts high when VOUT reaches 90–96 % of its nominal 1.2 V output and goes low if VOUT falls below that window. It is an open-drain output requiring an external pull-up resistor to VIN or VOUT, and its delay from VOUT rise to POK assertion is ≤40 µs per datasheet Figure 5.
Does SIP21107DT-12-E3 require an external noise bypass capacitor?
No, SIP21107DT-12-E3 does not require an external noise bypass capacitor. Unlike the SiP21106 variant, the SiP21107 family omits the BP pin and integrates internal compensation, enabling stable operation with only 1 µF input and output ceramic capacitors - confirmed in the "FEATURES" section and Typical Application Circuit on page 2.
What is the thermal derating specification for SIP21107DT-12-E3 in TSOT23-5L package?
SIP21107DT-12-E3 in TSOT23-5L has a thermal derating of 5.5 mW/°C above TA = 70 °C, with θJA = 180 °C/W. Maximum power dissipation at 85 °C ambient is 305 mW, and junction temperature must be kept ≤125 °C for continuous operation - values specified in Absolute Maximum Ratings and Notes on page 2.
How does the auto-discharge function operate in SIP21107DT-12-E3?
When EN is pulled low, SIP21107DT-12-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 under 1 ms, ensuring rapid removal of residual voltage - critical for preventing back-powering or false wake-up in multi-rail systems.
Is SIP21107DT-12-E3 still manufacturable or supported by Vishay?
No, SIP21107DT-12-E3 is End of Life per Vishay document 74442 Rev. G (08-Jun-09), with Last Available Purchase Date of 31-Dec-2014. Aetrix Electronics maintains legacy inventory and offers lifecycle coordination support, but new production designs should consider modern alternatives with active manufacturing status.
SIP21107DT-12-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):
- 1.2V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- -
- 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-12-E3 FAQ
1.How can I place an order for SIP21107DT-12-E3 through Aetrix?
Please submit a Request for Quotation (RFQ) for SIP21107DT-12-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-12-E3 reliable?
The price and inventory of SIP21107DT-12-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-12-E3 is usually 5 days.
3.What payment methods are accepted for SIP21107DT-12-E3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SIP21107DT-12-E3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SIP21107DT-12-E3?
SIP21107DT-12-E3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SIP21107DT-12-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-12-E3?
For technical support, including SIP21107DT-12-E3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SIP21107DT-12-E3 requirements.
6.How does Aetrix verify that SIP21107DT-12-E3 is sourced from the original manufacturer or authorized distributors?
All SIP21107DT-12-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-12-E3 meets industry standards.
7.What is the process for return or replacement of SIP21107DT-12-E3?
All SIP21107DT-12-E3 units undergo pre-shipment inspection (PSI). If there is an issue with SIP21107DT-12-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-12-E3 part is unused and in its original packaging.
Return procedure for SIP21107DT-12-E3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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