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Vishay Siliconix SIP21106DR-18-E3
- Part No.:
- SIP21106DR-18-E3
- Manufacturer:
- Vishay Siliconix
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
SIP21106DR-18-E3.pdf
- Description:
- IC REG LINEAR 1.8V 150MA SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,836
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Product details
Overview
SIP21106DR-18-E3 from Vishay Siliconix is a fixed-output 1.8 V, 150 mA low-noise LDO voltage regulator in SC70-5L package. It delivers 60 µV(rms) output noise (10 Hz–100 kHz), 135 mV dropout at 150 mA, and 35 µA ground current at 1 mA load-enabling extended battery life in portable RF-sensitive systems such as wireless handsets and digital cameras.
For engineers reviewing the SIP21106DR-18-E3 datasheet, SIP21106DR-18-E3 pinout, SIP21106DR-18-E3 application, or SIP21106DR-18-E3 equivalent, key selection criteria include ultra-low noise performance, SC70-5L footprint compatibility, auto-discharge capability during shutdown, and operation across –40 °C to +85 °C ambient temperature.
Technical Context
The SIP21106DR-18-E3 uses a P-channel MOSFET pass transistor with 0.9 Ω typical on-resistance, eliminating base-drive current losses inherent in PNP-based LDOs. Its bandgap reference (1.2 V) and error amplifier maintain regulation via internal feedback, achieving ±1.0 % output accuracy at 25 °C and ±2.5 % over full temperature range.
Startup employs an active pull-down circuit for fast transient response; shutdown mode activates a 100 Ω NMOS discharge path to ground, discharging a 1 µF output capacitor in under 1 ms. The BP pin accepts a 10 nF ceramic bypass capacitor to suppress output noise without compromising stability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8 V ±1.0 % at 25 °C - ensures stable core supply for low-voltage microcontrollers and RF ICs. |
| Dropout Voltage | 135 mV at 150 mA load - enables operation down to VIN = 1.935 V, maximizing usable battery range. |
| Output Noise | 60 µV(rms), 10 Hz–100 kHz bandwidth - meets stringent noise requirements for RF front-end power rails. |
| Ground Current | 35 µA typical at 1 mA load - minimizes quiescent drain in battery standby mode. |
| Shutdown Current | ≤1 µA at 85 °C - preserves battery charge during system sleep states. |
| Thermal Protection | 160 °C junction shutdown with 20 °C hysteresis - prevents permanent damage under sustained overload. |
| Capacitor Support | Stable with ≥1 µF ceramic output capacitor (ESR < 0.4 Ω) - reduces BOM cost and board area vs. tantalum alternatives. |
Pinout & Package
SC70-5L package (2.1 mm × 2.1 mm × 0.95 mm), RoHS-compliant, rated for –40 °C to +85 °C ambient operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - EN | Enable control input | Logic-high (>1.2 V) enables regulation; logic-low (<0.4 V) disables output and activates 100 Ω auto-discharge path. |
| 2 - GND | Power ground reference | Primary thermal and electrical return path; requires direct connection to large PCB ground plane for thermal management. |
| 3 - VIN | Input supply | Accepts 2.2–6.0 V input; must be bypassed with ≥1 µF ceramic capacitor to suppress line noise and improve PSRR. |
| 4 - VOUT | Regulated output | Delivers fixed 1.8 V ±2.5 % over temperature; supports peak 330 mA short-circuit current with foldback limiting. |
| 5 - BP | Noise bypass terminal | Connects external 10 nF ceramic capacitor to ground to reduce output noise by filtering reference/amp noise sources. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low output noise | 60 µV(rms) with 10 nF BP capacitor - enables clean power for RF transceivers and ADC references. |
| Auto-discharge on shutdown | 100 Ω internal NMOS pulls VOUT to GND in <1 ms - eliminates residual voltage that could disrupt downstream logic sequencing. |
| P-channel pass transistor | 0.9 Ω typical RDS(on) - eliminates base-current loss, enabling 35 µA ground current at light loads. |
| Low dropout architecture | 135 mV at full 150 mA load - extends usable battery life by >15 % compared to 200+ mV-dropout regulators. |
| Full industrial temp support | Specified from –40 °C to +85 °C ambient - validated for automotive infotainment and industrial handheld deployments. |
Applications
| Cellular Handsets | Wireless Modems |
|---|---|
Use Scenario: Powering RF transceiver ICs and baseband processors in compact GSM/UMTS handsets. IC Role / Device Role / Timing Role: Primary 1.8 V LDO for noise-sensitive analog sections and low-power digital cores. Use Value: 60 µV(rms) noise prevents receiver desensitization; 135 mV dropout maximizes talk time from single-cell Li-ion. | Use Scenario: Supplying 1.8 V to LTE/Wi-Fi SoCs and memory interfaces in portable broadband modems. IC Role / Device Role / Timing Role: Stable, low-noise bias rail for high-speed serial interfaces and RF synthesizers. Use Value: Auto-discharge ensures clean power-down sequencing; SC70-5L footprint saves space in dense modem PCB layouts. |
| Digital Cameras | MP3 Players |
Use Scenario: Delivering regulated 1.8 V to image sensor interfaces and ISP processors during burst capture. IC Role / Device Role / Timing Role: Low-noise auxiliary supply for analog front-end and clock distribution networks. Use Value: Fast transient response maintains VOUT stability during rapid sensor power cycling; 35 µA quiescent current extends playback time. | Use Scenario: Powering audio DACs, headphone amplifiers, and flash memory controllers in portable audio players. IC Role / Device Role / Timing Role: Clean 1.8 V rail for high-fidelity audio signal chain components. Use Value: 60 µV(rms) noise avoids audible hiss; SC70-5L size allows placement near sensitive analog ICs with minimal trace inductance. |
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 | 300 mA output, 1.8 V fixed, 600 mV dropout at 250 mA, 17 µA quiescent current | Larger dropout limits usable battery range; lower quiescent current benefits ultra-low-power sleep modes | Select when higher output current headroom is needed and input voltage margin exceeds 0.6 V above 1.8 V. |
| TCS21106DVP-18-E3 | Same SiP21106 family, TSC75-6L package (1.6 mm × 1.6 mm), identical electrical specs | Smaller footprint and lower thermal resistance (131 °C/W vs. 294 °C/W) but requires different PCB land pattern | Select when board space is constrained and thermal performance is critical; not pin-compatible with SC70-5L layout. |
Compared with MCP1700T-1802E/TT, SIP21106DR-18-E3 offers 4.5× lower dropout and superior noise performance but lower max output current; versus TCS21106DVP-18-E3, it shares identical regulation behavior but trades thermal efficiency for simplified SC70-5L assembly and broader distributor availability.
Availability
SIP21106DR-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 from Vishay (Last Available Purchase Date: 31-Dec-2014).
Supply support for SIP21106DR-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, miniaturization, and efficiency in power management ICs.
The SiP21106 series targets portable electronics requiring ultra-low-noise, low-quiescent-current LDOs with small-footprint packaging-specifically addressing battery life and RF integrity challenges in handheld devices.
FAQ
What is the maximum input voltage rating for SIP21106DR-18-E3?
The absolute maximum input voltage for SIP21106DR-18-E3 is 6.5 V relative to GND. Operation above 6.0 V is outside the recommended range and may degrade long-term reliability. The device is specified for continuous operation between 2.2 V and 6.0 V input, ensuring compatibility with single-cell Li-ion (up to 4.2 V) and dual-cell alkaline (up to 3.2 V) sources.
Does SIP21106DR-18-E3 require an external bypass capacitor on the BP pin?
Yes, SIP21106DR-18-E3 requires a 10 nF ceramic capacitor connected from the BP pin to 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 used for stability compensation-the regulator remains stable with only the required 1 µF output capacitor.
How does the auto-discharge function operate in SIP21106DR-18-E3?
When the EN pin is driven low, SIP21106DR-18-E3 enters shutdown mode and activates an internal 100 Ω NMOS transistor between VOUT and GND. This path discharges a 1 µF output capacitor from 1.8 V to <100 mV in under 1 ms, preventing residual voltage from interfering with downstream power sequencing or causing latch-up in connected logic.
Is SIP21106DR-18-E3 compatible with ceramic output capacitors?
Yes, SIP21106DR-18-E3 is fully compatible with ceramic output capacitors. It is stable with ≥1 µF X7R or Y7R dielectric types having ESR < 0.4 Ω. Z5U/Y5V ceramics are discouraged due to capacitance drift; if used, ≥2.2 µF is recommended to ensure stability across –40 °C to +85 °C.
What thermal derating applies to SIP21106DR-18-E3 in SC70-5L package?
SIP21106DR-18-E3 in SC70-5L has a thermal resistance θJA of 294 °C/W. Above 70 °C ambient, power dissipation must be derated at 3.4 mW/°C. For example, at 85 °C ambient, maximum allowable power drops to 305 mW − (15 °C × 3.4 mW/°C) = 254 mW, limiting IOUT to ~141 mA at 1.8 V output.
SIP21106DR-18-E3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay Siliconix
- Series:
- -
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- 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:
- 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:
- SC-70-5
SIP21106DR-18-E3 FAQ
1.How can I place an order for SIP21106DR-18-E3 through Aetrix?
Please submit a Request for Quotation (RFQ) for SIP21106DR-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 SIP21106DR-18-E3 reliable?
The price and inventory of SIP21106DR-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 SIP21106DR-18-E3 is usually 5 days.
3.What payment methods are accepted for SIP21106DR-18-E3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SIP21106DR-18-E3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SIP21106DR-18-E3?
SIP21106DR-18-E3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SIP21106DR-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 SIP21106DR-18-E3?
For technical support, including SIP21106DR-18-E3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SIP21106DR-18-E3 requirements.
6.How does Aetrix verify that SIP21106DR-18-E3 is sourced from the original manufacturer or authorized distributors?
All SIP21106DR-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 SIP21106DR-18-E3 meets industry standards.
7.What is the process for return or replacement of SIP21106DR-18-E3?
All SIP21106DR-18-E3 units undergo pre-shipment inspection (PSI). If there is an issue with SIP21106DR-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 SIP21106DR-18-E3 part is unused and in its original packaging.
Return procedure for SIP21106DR-18-E3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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