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Vishay Siliconix SIP21107DT-18-E3
- Part No.:
- SIP21107DT-18-E3
- Manufacturer:
- Vishay Siliconix
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
SIP21107DT-18-E3.pdf
- Description:
- IC REG LIN 1.8V 150MA TSOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,074
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Product details
Overview
SIP21107DT-18-E3 from Vishay Siliconix is a 150-mA, low-noise, low-dropout linear regulator with fixed 1.8 V output, Power-OK (POK) error flag, and ultra-low ground current (35 µA typ. at 1 mA). It features 135 mV dropout at full load, 1.0 % output voltage accuracy at 25 °C, and operates across -40 °C to +85 °C ambient. Designed for RF-sensitive portable electronics, it enables stable regulation using only 1 µF ceramic output capacitance.
For engineers reviewing the SIP21107DT-18-E3 datasheet, SIP21107DT-18-E3 pinout, SIP21107DT-18-E3 application, or SIP21107DT-18-E3 equivalent, key selection criteria include POK functionality for supply monitoring, dropout performance under 150 mA load, thermal shutdown behavior at 160 °C, auto-discharge resistance (100 Ω), and compatibility with TSOT23-5L footprint in space-constrained designs.
Technical Context
The SIP21107DT-18-E3 integrates a P-channel MOSFET pass transistor (0.9 Ω typical RDS(on)) and a 1.2 V bandgap reference, enabling precise feedback control without external resistors. Its error amplifier drives the pass gate to maintain regulation during line and load transients, with active pull-down during startup improving transient response.
POK functionality uses an open-drain NMOS output requiring an external pull-up resistor; it asserts low when VOUT falls below 90–96 % of nominal (1.62–1.73 V at 1.8 V output), with 1.5 % hysteresis. Shutdown mode reduces supply current to ≤1 µA while activating internal 100 Ω discharge path to ground.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8 V ±2.5 % over full temperature range (-40 °C to +85 °C); ensures stable core logic supply for low-voltage microcontrollers. |
| Dropout Voltage | 135 mV at 150 mA load; allows operation from 2.2 V input down to 1.8 V output, extending battery runtime in single-cell Li-ion or alkaline systems. |
| Ground Current | 35 µA typical at 1 mA load; minimizes quiescent drain in always-on subsystems like real-time clocks or sensor wake-up circuits. |
| POK Threshold | 90–96 % of VOUT (1.62–1.73 V); provides reliable power-good indication for system sequencers or brown-out detection without external comparators. |
| Auto-Discharge Resistance | 100 Ω typical; discharges 1 µF output capacitor to <10 % VOUT in <1 ms upon shutdown, preventing back-powering of upstream circuitry. |
| Thermal Shutdown | 160 °C junction temperature with 20 °C hysteresis; protects against sustained overload or poor PCB thermal design without latch-up. |
| Input Voltage Range | 2.2 V to 6.0 V; supports wide-input applications including USB-powered peripherals and multi-cell battery packs with simple front-end filtering. |
Pinout & Package
TSOT23-5L package (3.05 mm × 2.85 mm × 1.0 mm), RoHS-compliant, rated for industrial temperature range (-40 °C to +85 °C).
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 (EN) | Enable input | Active-high logic control: ≥1.2 V enables regulation; ≤0.4 V disables output and activates auto-discharge; must not float. |
| 2 (GND) | Power ground | Primary return path for load current and thermal conduction; requires direct connection to large copper plane for thermal management. |
| 3 (VIN) | Input supply | Accepts 2.2–6.0 V; bypassed with 1 µF ceramic capacitor to suppress input ripple and improve PSRR. |
| 4 (VOUT) | Regulated output | Delivers 1.8 V ±2.5 %; stable with ≥1 µF ceramic output capacitor; supports peak 330 mA short-circuit current. |
| 5 (POK) | Open-drain error flag | Asserts low when VOUT drops below threshold; requires external pull-up to VIN or VOUT; sinks up to 0.5 mA. |
Key Features
| Feature | Design Value |
|---|---|
| No external noise bypass capacitor required | Eliminates need for BP pin capacitor (unlike SiP21106), simplifying BOM and layout for cost-sensitive consumer designs. |
| Integrated POK (Power OK) output | Provides system-level power monitoring without external supervisor IC, reducing component count in battery-powered handhelds. |
| Output auto-discharge on shutdown | 100 Ω internal NMOS discharges output capacitance rapidly, preventing unintended hold-up or back-feeding in multi-rail systems. |
| Stable with low-ESR ceramic capacitors | Guaranteed stability with 1 µF X7R/Y7R ceramics, avoiding costly tantalum or polymer alternatives and reducing board area. |
| Short-circuit and thermal protection | 330 mA typical current limit and 160 °C thermal shutdown prevent damage during fault conditions, supporting robust field reliability. |
Applications
| Cellular Handsets | Wireless Modems |
|---|---|
Use Scenario: Powering baseband processor I/O rails and RF front-end bias supplies in compact GSM/UMTS handsets. IC Role / Device Role / Timing Role: Low-noise LDO delivering clean 1.8 V to sensitive analog sections while providing POK status to application processor. Use Value: POK signal enables precise power sequencing during boot and sleep transitions; 135 mV dropout extends talk time from aging Li-ion cells. | Use Scenario: Supplying 1.8 V to LTE/Wi-Fi transceiver ICs in embedded wireless modules with strict EMI requirements. IC Role / Device Role / Timing Role: Regulator with integrated fault reporting, used alongside switching converters to isolate noise-sensitive RF circuitry. Use Value: Eliminates need for discrete POK comparator; 35 µA ground current preserves standby battery life during deep-sleep modes. |
| Digital Cameras | Noise-Sensitive Sensor Interfaces |
Use Scenario: Providing regulated 1.8 V to image sensor interface logic and ADC reference buffers in portable cameras. IC Role / Device Role / Timing Role: Fixed-output LDO ensuring stable digital core voltage during burst capture sequences with rapid load changes. Use Value: Fast 70 µs turn-on time synchronizes with sensor initialization; auto-discharge prevents ghost power during lens retraction. | Use Scenario: Biasing precision analog front-ends in medical wearables or industrial sensors where supply noise directly impacts measurement accuracy. IC Role / Device Role / Timing Role: Ultra-low-noise voltage source with guaranteed POK assertion for system health monitoring. Use Value: POK output feeds FPGA or MCU reset controller, ensuring firmware only executes after stable 1.8 V rail is confirmed. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-1802E/TT | 150 mA max, 600 mV dropout at 150 mA, no POK output, 1.8 V fixed, SOT23-3 package | Lacks power-good signaling; requires external supervisor for sequencing; smaller footprint but higher dropout limits low-VIN use cases | Select when POK is unnecessary and board space is critical; avoid where supply monitoring or low-input operation is required. |
| TLS820B1L1V50 | 200 mA max, 250 mV dropout at 150 mA, integrated watchdog and reset, AEC-Q100 qualified, PG-TO252-5 package | Automotive-grade with extended temp range (-40 °C to +150 °C); includes reset generator and watchdog; larger thermally enhanced package | Select for automotive infotainment or ADAS subsystems needing functional safety support; overqualified for consumer portables. |
Compared with MCP1700T-1802E/TT, SIP21107DT-18-E3 delivers 135 mV lower dropout and integrated POK-critical for battery runtime and system sequencing-while TLS820B1L1V50 adds automotive qualification and reset functions at the cost of size and complexity unsuited for handheld consumer devices.
Availability
SIP21107DT-18-E3 is available at Aetrix Electronics and suitable for cellular handsets, wireless modems, and digital cameras requiring stable component supply despite end-of-life status.
Supply support for SIP21107DT-18-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 family targets portable and battery-operated equipment, delivering low-noise, low-quiescent-current LDO regulation with integrated fault reporting and thermal protection in ultra-thin packages.
FAQ
What is the minimum input voltage required for SIP21107DT-18-E3 to regulate 1.8 V output?
The SIP21107DT-18-E3 requires a minimum input voltage of 2.2 V to maintain regulation at 1.8 V output. This is defined by its 135 mV dropout voltage at 150 mA load, meaning VIN must exceed VOUT by at least that margin. Below 2.2 V, the device enters dropout and output voltage declines linearly with input.
Does SIP21107DT-18-E3 require an external pull-up resistor on the POK pin?
Yes, SIP21107DT-18-E3 requires an external pull-up resistor on the POK pin because it is an open-drain NMOS output. The resistor must connect to either VIN or VOUT to ensure proper high-level assertion (typically 10–100 kΩ). Without it, POK remains floating and cannot signal "power good" reliably.
How does the auto-discharge function operate in SIP21107DT-18-E3 during shutdown?
When the EN pin is driven low, SIP21107DT-18-E3 disables regulation and activates an internal 100 Ω NMOS discharge path between VOUT and GND. This pulls down a 1 µF output capacitor to <10 % of nominal voltage within 1 ms, preventing residual charge from interfering with downstream circuitry or causing latch-up in multi-rail systems.
What is the maximum junction temperature and thermal protection behavior of SIP21107DT-18-E3?
SIP21107DT-18-E3 triggers thermal shutdown at 160 °C junction temperature and resumes operation after cooling by ~20 °C hysteresis. During sustained overload, this causes pulsed output rather than permanent shutdown. Continuous operation above 125 °C junction temperature is not recommended per datasheet specifications.
Can SIP21107DT-18-E3 be used with ceramic output capacitors smaller than 1 µF?
No-SIP21107DT-18-E3 is specified for stable operation only with ≥1 µF ceramic output capacitance (X7R or Y7R dielectric). Using smaller values risks instability, excessive ringing during load transients, or failure to meet PSRR and noise specifications. The 1 µF minimum ensures sufficient phase margin across the industrial temperature range.
SIP21107DT-18-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):
- 1.8V
- 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-18-E3 FAQ
1.How can I place an order for SIP21107DT-18-E3 through Aetrix?
Please submit a Request for Quotation (RFQ) for SIP21107DT-18-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-18-E3 reliable?
The price and inventory of SIP21107DT-18-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-18-E3 is usually 5 days.
3.What payment methods are accepted for SIP21107DT-18-E3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SIP21107DT-18-E3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SIP21107DT-18-E3?
SIP21107DT-18-E3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SIP21107DT-18-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-18-E3?
For technical support, including SIP21107DT-18-E3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SIP21107DT-18-E3 requirements.
6.How does Aetrix verify that SIP21107DT-18-E3 is sourced from the original manufacturer or authorized distributors?
All SIP21107DT-18-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-18-E3 meets industry standards.
7.What is the process for return or replacement of SIP21107DT-18-E3?
All SIP21107DT-18-E3 units undergo pre-shipment inspection (PSI). If there is an issue with SIP21107DT-18-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-18-E3 part is unused and in its original packaging.
Return procedure for SIP21107DT-18-E3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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