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Vishay Siliconix SIP21106DR-285-E3
- Part No.:
- SIP21106DR-285-E3
- Manufacturer:
- Vishay Siliconix
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
SIP21106DR-285-E3.pdf
- Description:
- IC REG LINEAR 2.85V 150MA SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,400
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Product details
Overview
SIP21106DR-285-E3 from Vishay Siliconix is a fixed-output 2.85 V, 150 mA low-noise low-dropout (LDO) regulator with 60 µV(rms) output noise (10 Hz–100 kHz), 135 mV dropout at full load, and ±1.0 % output voltage accuracy at 25 °C. It employs a P-channel MOSFET pass element, supports ultra-low ground current (35 µA typ. at 1 mA), and delivers stable regulation for RF-sensitive portable electronics such as cellular handsets and digital cameras.
For engineers reviewing the SIP21106DR-285-E3 datasheet, SIP21106DR-285-E3 pinout, SIP21106DR-285-E3 application, or SIP21106DR-285-E3 equivalent, key selection criteria include its low-noise BP pin architecture, SC70-5L package footprint, auto-discharge capability during shutdown, and compatibility with 1 µF ceramic output capacitors across -40 °C to +85 °C ambient operation.
Technical Context
The SIP21106DR-285-E3 uses a BiCMOS process with a 1.2 V bandgap reference and error amplifier driving a 0.9 Ω typical P-channel MOSFET pass transistor. Its feedback network is internal and fixed for 2.85 V output, eliminating external resistor requirements.
Startup includes an active pull-down circuit for improved transient response, and shutdown mode activates a 100 Ω NMOS discharge path to ground. The BP pin accepts a 10 nF capacitor to filter output noise, and the EN pin enables logic-level on/off control with 1.2 V high threshold and 0.4 V low threshold.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.85 V ±1.0 % at 25 °C; ensures precise rail generation for 2.8 V–2.9 V logic or analog subsystems. |
| Dropout Voltage | 135 mV at 150 mA load; enables operation down to VIN = 2.985 V while maintaining regulation. |
| Output Noise | 60 µV(rms), 10 Hz–100 kHz bandwidth with 10 nF BP capacitor; meets stringent RF supply noise requirements. |
| Ground Current | 35 µA typical at 1 mA load; extends battery life in always-on or low-power standby modes. |
| Shutdown Current | ≤1 µA maximum at 85 °C; minimizes leakage drain 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 COUT (ESR < 0.4 Ω); reduces BOM count and board area vs. tantalum alternatives. |
Pinout & Package
Package: SC70-5L (2.1 mm × 2.1 mm × 0.95 mm), RoHS-compliant, industrial temperature range (-40 °C to +85 °C).
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 (EN) | Enable input | Active-high logic control; <0.4 V disables regulator and engages 100 Ω auto-discharge path. |
| 2 (GND) | Power ground | Primary thermal and electrical return; must connect to large PCB ground plane for thermal management. |
| 3 (VIN) | Input supply | Accepts 2.2–6.0 V input; requires 1 µF ceramic bypass capacitor to suppress line noise and transients. |
| 4 (VOUT) | Regulated output | Delivers 2.85 V ±1.0 %; connects to 1 µF ceramic output capacitor for stability and load transient response. |
| 5 (BP) | Noise bypass | Connects to 10 nF ceramic capacitor to ground; forms low-pass filter that reduces output noise to 60 µV(rms). |
Key Features
| Feature | Design Value |
|---|---|
| Low-noise BP pin architecture | Enables 60 µV(rms) output noise with only 10 nF capacitor-no additional filtering components required. |
| P-channel MOSFET pass element | Eliminates base drive current; achieves 35 µA ground current at light loads and avoids saturation losses in dropout. |
| Auto-discharge on shutdown | 100 Ω internal NMOS pulls VOUT to GND in <1 ms for fast power-state transitions and signal integrity. |
| Ultra-stable ceramic capacitor support | Guaranteed stability with 1 µF X7R/Y7R ceramic COUT-reduces cost, size, and aging drift vs. electrolytic solutions. |
| Integrated protection | 330 mA current limit (typ.) and 160 °C thermal shutdown prevent failure during short-circuit or overtemperature events. |
Applications
| Cellular Handsets | Digital Cameras |
|---|---|
Use Scenario: Powering RF transceiver bias rails and baseband processor I/O supplies in compact handheld form factors. IC Role / Device Role / Timing Role: Low-noise LDO providing clean 2.85 V supply to sensitive RF front-end circuits. Use Value: 60 µV(rms) noise ensures minimal phase noise degradation in VCOs and reduced EVM in LTE/Wi-Fi transmit paths. | Use Scenario: Supplying image sensor analog core and ADC reference voltage in battery-powered still/video cameras. IC Role / Device Role / Timing Role: Fixed-output LDO delivering stable 2.85 V rail with fast load transient response during burst capture. Use Value: Active pull-down startup and 135 mV dropout extend usable battery voltage range, increasing shot count per charge. |
| Wireless Modems | MP3 Players |
Use Scenario: Regulating power to embedded modem SoCs and memory interfaces in IoT gateways and M2M modules. IC Role / Device Role / Timing Role: Enable-controlled LDO supporting low-power sleep/wake cycles with sub-µA shutdown current. Use Value: ≤1 µA max shutdown current at 85 °C preserves battery capacity during extended idle periods in remote deployments. | Use Scenario: Supplying audio DAC and headphone amplifier stages in portable music players with tight space constraints. IC Role / Device Role / Timing Role: Compact SC70-5L LDO delivering regulated 2.85 V with minimal board footprint and thermal overhead. Use Value: 2.1 mm × 2.1 mm SC70-5L package enables integration into ultra-thin player designs without compromising thermal performance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-noise LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-2852E/TT | 300 mA rated, 170 mV dropout at 250 mA, 30 µV(rms) noise, SOT-23-5 package | Higher current capability but larger footprint; lacks BP pin for noise optimization | Select when higher output current or lower noise is prioritized over SC70 size and BP-based noise tailoring |
| TCS21106DVP-285-E3 | Same SiP21106 family, TSC75-6L package (1.6 mm × 1.6 mm), identical electrical specs | Smaller footprint and lower thermal resistance (θJA = 131 °C/W), but 6-pin layout requires PCB redesign | Select when board space is critical and layout revision is feasible to gain thermal margin and miniaturization |
Compared with MCP1700T-2852E/TT and TCS21106DVP-285-E3, SIP21106DR-285-E3 offers the optimal balance of SC70-5L footprint, BP-enabled noise control, and proven 2.85 V stability for space-constrained RF applications-without requiring layout changes or sacrificing low-noise performance.
Availability
SIP21106DR-285-E3 is available at Aetrix Electronics and suitable for cellular handsets, digital cameras, and wireless modems requiring stable component supply despite end-of-life status.
Supply support for SIP21106DR-285-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 SiP21106 series targets battery-powered portable electronics needing ultra-low-noise, low-quiescent-current regulation in miniature packages-specifically addressing RF, audio, and imaging subsystems where supply integrity directly impacts signal fidelity.
FAQ
What is the output voltage tolerance of SIP21106DR-285-E3 over temperature?
The SIP21106DR-285-E3 maintains ±2.5 % output voltage accuracy across the full operating temperature range of -40 °C to +85 °C. At room temperature (25 °C), the tolerance tightens to ±1.0 %. This specification ensures reliable operation for precision analog and RF circuits in consumer portable devices.
Does SIP21106DR-285-E3 require an external bypass capacitor on the BP pin?
Yes, SIP21106DR-285-E3 requires a 10 nF ceramic capacitor between the BP pin and ground to achieve its specified 60 µV(rms) output noise performance. Omitting this capacitor increases noise to ~350 µV(rms). The device remains stable without it, but low-noise operation depends on this external component.
What is the maximum input voltage rating for SIP21106DR-285-E3?
The absolute maximum input voltage for SIP21106DR-285-E3 is 6.5 V. The recommended operating range is 2.2 V to 6.0 V. Exceeding 6.5 V risks permanent damage, and operation below 2.2 V prevents regulation due to insufficient headroom for the 135 mV dropout voltage at full load.
How does the auto-discharge function work in SIP21106DR-285-E3?
When the EN pin is driven low, SIP21106DR-285-E3 enters shutdown mode and activates an internal 100 Ω NMOS transistor between VOUT and GND. This path discharges a 1 µF output capacitor to <10 % of nominal voltage in under 1 ms, ensuring rapid power-down and preventing floating supply rails in multi-rail systems.
Is SIP21106DR-285-E3 compatible with 1 µF ceramic output capacitors?
Yes, SIP21106DR-285-E3 is fully stable with a 1 µF X7R or Y7R ceramic output capacitor (ESR < 0.4 Ω). This eliminates the need for larger or more expensive tantalum capacitors, reducing cost and board area while maintaining robust load transient response and PSRR performance.
SIP21106DR-285-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):
- 2.85V
- 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:
- SC-70-5
SIP21106DR-285-E3 FAQ
1.How can I place an order for SIP21106DR-285-E3 through Aetrix?
Please submit a Request for Quotation (RFQ) for SIP21106DR-285-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-285-E3 reliable?
The price and inventory of SIP21106DR-285-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-285-E3 is usually 5 days.
3.What payment methods are accepted for SIP21106DR-285-E3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SIP21106DR-285-E3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SIP21106DR-285-E3?
SIP21106DR-285-E3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SIP21106DR-285-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-285-E3?
For technical support, including SIP21106DR-285-E3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SIP21106DR-285-E3 requirements.
6.How does Aetrix verify that SIP21106DR-285-E3 is sourced from the original manufacturer or authorized distributors?
All SIP21106DR-285-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-285-E3 meets industry standards.
7.What is the process for return or replacement of SIP21106DR-285-E3?
All SIP21106DR-285-E3 units undergo pre-shipment inspection (PSI). If there is an issue with SIP21106DR-285-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-285-E3 part is unused and in its original packaging.
Return procedure for SIP21106DR-285-E3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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