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Vishay Siliconix SIP21106DT-46-E3
- Part No.:
- SIP21106DT-46-E3
- Manufacturer:
- Vishay Siliconix
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
SIP21106DT-46-E3.pdf
- Description:
- IC REG LIN 4.6V 150MA TSOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,630
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Product details
Overview
SIP21106DT-46-E3 from Vishay Siliconix is a fixed-output 4.6 V, 150 mA low-noise low-dropout (LDO) regulator in TSOT23-5L package, featuring 135 mV dropout at full load, 60 µV(rms) output noise (10 Hz–100 kHz), and ±1.0 % output voltage accuracy at 25 °C. It delivers stable power to RF sections and battery-sensitive portable electronics such as wireless handsets and digital cameras.
For engineers reviewing the SIP21106DT-46-E3 datasheet, SIP21106DT-46-E3 pinout, SIP21106DT-46-E3 application, or SIP21106DT-46-E3 equivalent, key selection criteria include ultra-low ground current (35 µA typ. at 1 mA), active output auto-discharge (100 Ω NMOS), shutdown current ≤1 µA, and compatibility with 1 µF ceramic output capacitors without external compensation.
Technical Context
The SIP21106DT-46-E3 employs a P-channel MOSFET pass transistor with 0.9 Ω typical on-resistance, enabling low dropout and eliminating base-drive current losses inherent in PNP-based LDOs. Its bandgap reference (1.2 V) feeds an error amplifier that regulates output by adjusting the PMOS gate voltage via internal feedback.
Startup includes active pull-down for fast transient response; shutdown mode disables regulation and engages a 100 Ω internal discharge path to ground. The BP pin accepts a 10 nF bypass capacitor to suppress output noise-critical for RF supply rails where spectral purity is essential.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 4.6 V ±1.0 % at 25 °C; ensures precise biasing for 4.5–4.7 V logic or analog circuitry without external resistors. |
| Dropout Voltage | 135 mV at 150 mA load; enables operation down to VIN = 4.735 V while maintaining regulation-critical for single-cell Li-ion or dual-cell alkaline systems. |
| Output Noise | 60 µV(rms), 10 Hz–100 kHz bandwidth with 10 nF BP capacitor; meets stringent RF supply noise requirements for cellular transceivers and low-phase-noise oscillators. |
| Ground Current | 35 µA typical at 1 mA load; extends battery runtime in always-on standby modes of portable devices. |
| Shutdown Current | ≤1 µA at 85 °C; minimizes leakage during deep sleep, supporting multi-week shelf life in battery-powered IoT sensors. |
| Auto-Discharge Resistance | 100 Ω NMOS pull-down at EN = 0 V; discharges 1 µF output cap in <1 ms, preventing residual voltage from interfering with system reset sequencing. |
| Thermal Protection | 160 °C junction shutdown with 20 °C hysteresis; prevents permanent damage during sustained overload or poor PCB thermal design. |
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 | Circuit Role | Design Meaning |
|---|---|---|
| 1 (EN) | Enable input | Active-high control: ≥1.2 V enables regulation; ≤0.4 V disables output and activates auto-discharge-requires no external pull-up if tied to VIN. |
| 2 (GND) | Power ground | Primary thermal and electrical return path; must connect directly to large PCB ground plane for thermal dissipation and noise immunity. |
| 3 (VIN) | Input supply | Accepts 2.2–6.0 V input; requires 1 µF ceramic bypass capacitor close to pin to suppress line noise and support transient response. |
| 4 (VOUT) | Regulated output | Delivers stable 4.6 V; supports 1 µF ceramic output capacitor for stability-no ESR requirement needed. |
| 5 (BP) | Noise bypass | Connects to 10 nF ceramic capacitor to ground; forms low-pass filter that reduces high-frequency output noise by >20 dB across 10 kHz–100 kHz band. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low noise regulation | 60 µV(rms) output noise with 10 nF BP cap-enables clean power for RF front-ends and precision ADC references. |
| P-channel MOSFET pass element | 0.9 Ω typical RDS(on) eliminates base-current loss, reducing quiescent current vs. PNP LDOs and improving light-load efficiency. |
| Fast transient recovery | Active pull-down circuit during startup improves load-step response time to <50 µs-prevents brownout during processor wake-up bursts. |
| Integrated safety protections | 330 mA current limit (typ.) and 160 °C thermal shutdown with hysteresis prevent failure under short-circuit or overheating conditions. |
| Small-footprint packaging | TSOT23-5L footprint (3.05 mm × 2.85 mm) saves board space vs. SOT-23-5 alternatives while maintaining thermal performance via exposed pad-compatible layout. |
Applications
| Cellular RF Power Supply | Digital Camera Image Sensor Bias |
|---|---|
Use Scenario: Providing clean 4.6 V bias to power amplifier stages and local oscillator circuits in GSM/UMTS handsets. IC Role / Device Role / Timing Role: Low-noise LDO delivering regulated supply to RF ICs sensitive to supply ripple-induced phase noise and EVM degradation. Use Value: 60 µV(rms) noise floor prevents reciprocal mixing and maintains >35 dB ACLR in transmit chain under dynamic load conditions. | Use Scenario: Supplying stable 4.6 V to CMOS image sensor analog front-end and column ADC drivers. IC Role / Device Role / Timing Role: Precision voltage source ensuring consistent pixel response and minimizing fixed-pattern noise across exposure cycles. Use Value: ±1.0 % output accuracy and <135 mV dropout preserve SNR margin when battery voltage drops to 4.735 V during flash operation. |
| Wireless Modem Baseband Core | Portable MP3 Player Audio DAC |
Use Scenario: Powering baseband processor I/O banks and memory interfaces in embedded LTE modems. IC Role / Device Role / Timing Role: High-PSRR (75 dB @ 1 kHz) LDO isolating digital switching noise from sensitive analog supply domains. Use Value: 75 dB PSRR suppresses coupling from 1 MHz clock harmonics into baseband analog rails, reducing bit error rate in QAM demodulation. | Use Scenario: Delivering low-noise 4.6 V to stereo audio DAC and headphone amplifier in battery-powered players. IC Role / Device Role / Timing Role: Ultra-low-quiescent LDO maintaining signal integrity during playback while extending battery life in standby. Use Value: 35 µA ground current at 1 mA load enables >100-hour playback on 500 mAh battery; auto-discharge prevents pop noise at power-on. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-4602E/TT | 300 mA output, 1.6 µA quiescent current, no BP pin; 170 mV dropout at 250 mA. | Lacks dedicated noise-bypass capability; higher dropout limits use in low-VIN battery scenarios. | Select when ultra-low IQ dominates over noise performance and load exceeds 150 mA. |
| Torex XC6206P462MR-G | 150 mA, 60 µV(rms) noise, but no BP pin; 200 mV dropout at 150 mA; SC-70-5 package. | Higher dropout and no configurable noise filtering reduce suitability for RF or tight-VIN designs. | Choose for cost-sensitive, non-RF applications where 4.6 V accuracy and small size are primary. |
Compared with MCP1700T-4602E/TT and XC6206P462MR-G, SIP21106DT-46-E3 uniquely combines 135 mV dropout, 60 µV(rms) noise with BP pin, and 100 Ω auto-discharge-making it optimal for RF and battery-constrained portable systems where both efficiency and spectral purity are critical.
Availability
SIP21106DT-46-E3 is available at Aetrix Electronics and suitable for cellular phones, wireless modems, and digital cameras requiring stable component supply with known end-of-life status and legacy inventory support.
Supply support for SIP21106DT-46-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, thermal efficiency, and miniaturization for demanding industrial and portable applications.
The SiP21106 family targets low-power, noise-sensitive portable electronics-delivering high-accuracy, low-dropout regulation with integrated protection and minimal external components for space-constrained PCBs.
FAQ
What is the maximum input voltage rating for SIP21106DT-46-E3?
The absolute maximum input voltage for SIP21106DT-46-E3 is 6.5 V relative to GND. Operation above 6.0 V is outside the recommended range and may compromise long-term reliability or parametric performance. The device is specified for continuous operation from 2.2 V to 6.0 V input, with dropout behavior defined at loads up to 150 mA.
Does SIP21106DT-46-E3 require an external bypass capacitor on the BP pin?
Yes-SIP21106DT-46-E3 requires a 10 nF ceramic capacitor between the BP pin and GND to achieve its specified 60 µV(rms) output noise performance. Omitting this capacitor increases noise to ~350 µV(rms). The BP pin is not functional in SiP21107/SiP21108 variants, confirming its dedicated noise-filtering role in SIP21106DT-46-E3.
Can SIP21106DT-46-E3 be used with a 1 µF output capacitor?
Yes-SIP21106DT-46-E3 is explicitly designed for stable operation with a minimum 1 µF ceramic output capacitor and does not require ESR tuning. This simplifies layout and reduces BOM count versus older LDOs needing tantalum or aluminum electrolytic caps with specific ESR ranges.
What happens to the output when the EN pin is pulled low?
When EN is pulled below 0.4 V, SIP21106DT-46-E3 enters shutdown mode: regulation ceases, quiescent current drops to ≤1 µA, and the internal 100 Ω NMOS connects VOUT to GND, discharging a 1 µF capacitor in under 1 ms. This prevents floating outputs and ensures deterministic reset behavior in host systems.
Is SIP21106DT-46-E3 still in production?
No-SIP21106DT-46-E3 is End of Life per Vishay documentation (Last Available Purchase Date: 31-Dec-2014). Aetrix Electronics maintains legacy inventory with full traceability and provides lifecycle coordination support, including cross-reference guidance and obsolescence mitigation planning for ongoing production programs.
SIP21106DT-46-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):
- 4.6V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.22V @ 150mA
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- 85 µA
- Current - Supply (Max):
- -
- PSRR:
- 75dB ~ 40dB (1kHz ~ 100kHz)
- Control Features:
- Enable
- Protection Features:
- Over Temperature, Short Circuit
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-5
SIP21106DT-46-E3 FAQ
1.How can I place an order for SIP21106DT-46-E3 through Aetrix?
Please submit a Request for Quotation (RFQ) for SIP21106DT-46-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 SIP21106DT-46-E3 reliable?
The price and inventory of SIP21106DT-46-E3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SIP21106DT-46-E3 is usually 5 days.
3.What payment methods are accepted for SIP21106DT-46-E3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SIP21106DT-46-E3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SIP21106DT-46-E3?
SIP21106DT-46-E3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SIP21106DT-46-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 SIP21106DT-46-E3?
For technical support, including SIP21106DT-46-E3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SIP21106DT-46-E3 requirements.
6.How does Aetrix verify that SIP21106DT-46-E3 is sourced from the original manufacturer or authorized distributors?
All SIP21106DT-46-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 SIP21106DT-46-E3 meets industry standards.
7.What is the process for return or replacement of SIP21106DT-46-E3?
All SIP21106DT-46-E3 units undergo pre-shipment inspection (PSI). If there is an issue with SIP21106DT-46-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 SIP21106DT-46-E3 part is unused and in its original packaging.
Return procedure for SIP21106DT-46-E3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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