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Vishay Siliconix SIP21106DR-26-E3
- Part No.:
- SIP21106DR-26-E3
- Manufacturer:
- Vishay Siliconix
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
SIP21106DR-26-E3.pdf
- Description:
- IC REG LINEAR 2.6V 150MA SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,360
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Product details
Overview
SIP21106DR-26-E3 from Vishay Siliconix is a fixed-output 2.6 V, 150 mA low-noise LDO voltage regulator in SC70-5L 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 - designed for battery-powered RF systems requiring ultra-low ground current (35 µA typ. at 1 mA) and fast transient response.
For engineers reviewing the SIP21106DR-26-E3 datasheet, SIP21106DR-26-E3 pinout, SIP21106DR-26-E3 application, or SIP21106DR-26-E3 equivalent, key selection criteria include dropout performance under 150 mA load, BP-pin bypass capacitor dependency for noise suppression, auto-discharge capability during shutdown, thermal protection behavior, and compatibility with 1 µF ceramic output capacitors without external compensation.
Technical Context
The SIP21106DR-26-E3 uses an internal P-channel MOSFET pass transistor (0.9 Ω typical RDS(on)) with bandgap reference (1.2 V) and error amplifier feedback control, enabling stable regulation across -40 °C to +85 °C ambient. Its architecture eliminates base-drive current loss inherent in PNP-based LDOs, directly supporting ultra-low quiescent current operation.
Startup includes active pull-down circuitry improving output transient response; shutdown mode engages a 100 Ω NMOS discharge path to ground, discharging a 1 µF output capacitor in <1 ms. The BP pin accepts a 10 nF ceramic capacitor to form a low-pass filter that reduces output noise without compromising stability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.6 V ±2.5 % over full temperature range - ensures consistent biasing for 2.6 V logic or analog rails without external resistors. |
| Dropout Voltage | 135 mV at 150 mA load - enables regulation down to VIN = 2.73 V, extending usable battery life in single-cell Li-ion or alkaline systems. |
| Output Noise | 60 µV(rms), 10 Hz–100 kHz with 10 nF BP capacitor - meets stringent RF front-end supply requirements where spectral purity impacts receiver sensitivity. |
| Ground Current | 35 µA typical at 1 mA load - minimizes standby power draw in always-on subsystems such as real-time clocks or sensor wake-up circuits. |
| Shutdown Current | ≤1 µA maximum at 85 °C - preserves battery charge during extended sleep modes in portable instrumentation or wearables. |
| Thermal Protection | 160 °C junction shutdown with 20 °C hysteresis - prevents permanent damage during sustained overload or poor PCB thermal design. |
| Auto-Discharge | 100 Ω internal NMOS pull-down activated when EN = 0 V - eliminates residual output voltage that could interfere with downstream power sequencing or cause latch-up. |
Pinout & Package
The SIP21106DR-26-E3 is housed in a RoHS-compliant SC70-5L package (2.1 mm × 2.1 mm × 0.95 mm), optimized for space-constrained portable designs and compatible with standard reflow soldering profiles. Thermal performance is enhanced by direct GND pin connection to a large copper plane.
| Pin/Terminal | 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. |
| 2 - GND | Power ground | Primary return path for load current and thermal conduction - must be connected to a low-impedance ground plane for optimal thermal dissipation. |
| 3 - VIN | Input supply | Accepts 2.2 V to 6.0 V input; requires ≥1 µF ceramic bypass capacitor placed adjacent to pin for line-transient immunity. |
| 4 - VOUT | Regulated output | Delivers stable 2.6 V up to 150 mA; supports 1 µF ceramic output capacitor without external compensation or ESR requirements. |
| 5 - BP | Noise bypass | Connects to 10 nF ceramic capacitor to ground - forms RC filter that suppresses high-frequency noise generated internally or coupled from VIN. |
Key Features
| Feature | Design Value |
|---|---|
| Low-noise regulation | 60 µV(rms) output noise with 10 nF BP capacitor - enables clean power delivery to sensitive RF ICs, ADCs, and VCOs without additional filtering stages. |
| P-channel pass transistor | 0.9 Ω typical RDS(on) - eliminates base-current losses of PNP alternatives, reducing ground current by >50 % at light loads versus legacy LDOs. |
| Fast startup & transient response | 70 µs turn-on time and active pull-down circuit - ensures rapid system wake-up and tight output regulation during dynamic load steps up to 150 mA. |
| Integrated protection | 330 mA current limit (typ.) and 160 °C thermal shutdown - allows safe operation under short-circuit or overtemperature conditions without external circuitry. |
| SC70-5L footprint | 2.1 mm × 2.1 mm area - fits into dense layouts typical of cellular handsets, Bluetooth earbuds, and compact IoT sensors where board space is premium. |
Applications
| Cellular Handset Power Rails | Wireless Modem RF Subsystem |
|---|---|
Use Scenario: Supplying 2.6 V bias to power amplifier driver stages and RF transceiver analog sections in GSM/UMTS handsets. IC Role / Device Role / Timing Role: Low-noise local LDO delivering regulated 2.6 V from a shared 3.3–4.2 V battery rail, decoupling RF noise from digital switching domains. Use Value: 60 µV(rms) noise floor prevents degradation of adjacent channel power ratio (ACPR) and maintains EVM compliance in transmit paths. | Use Scenario: Providing clean 2.6 V supply to low-noise amplifiers (LNAs) and mixer cores in embedded LTE/Wi-Fi modems. IC Role / Device Role / Timing Role: Dedicated post-regulator isolating sensitive RF front-end circuitry from noisy system power buses. Use Value: BP-pin bypass support enables sub-100 µV noise performance critical for receiver sensitivity below -100 dBm. |
| Digital Camera Image Sensor Bias | Portable Medical Diagnostic Sensor |
Use Scenario: Powering CMOS image sensor analog front-end (AFE) and column ADC circuitry in compact digital cameras. IC Role / Device Role / Timing Role: Fixed-output LDO supplying precision 2.6 V reference voltage to sensor pixel arrays and correlated double sampling (CDS) blocks. Use Value: 1.0 % output accuracy at 25 °C and <2.5 % drift over -40 °C to +85 °C ensures consistent analog gain calibration across operating environments. | Use Scenario: Delivering stable 2.6 V to low-power biosignal amplifiers (ECG, pulse oximetry) in handheld diagnostic tools. IC Role / Device Role / Timing Role: Ultra-low-quiescent LDO maintaining regulated supply during intermittent sensor acquisition cycles with microamp-level standby current. Use Value: 35 µA ground current at 1 mA load extends battery life beyond 12 months in devices operating on coin-cell batteries. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-2602E/TT | 2.6 V fixed output, 250 mA rating, 170 mV dropout at 250 mA, 65 µV(rms) noise, SOT-23-5 package | Higher current capability but larger footprint and higher dropout - suitable where peak load exceeds 150 mA | Select when higher output current headroom is required and SC70 size constraint is relaxed. |
| TCS21106DVP-26-E3 | Same SiP21106 family, TSC75-6L package (1.6 mm × 1.6 mm), identical electrical specs, no NC pin | Smaller footprint and lower thermal resistance (θJA = 131 °C/W vs. 294 °C/W), but requires different PCB layout and stencil | Select for ultra-compact designs needing better thermal performance and willing to revise land pattern. |
Compared with MCP1700T-2602E/TT, SIP21106DR-26-E3 offers superior noise performance and smaller SC70-5L footprint but lower current rating; compared with TCS21106DVP-26-E3, it shares identical regulation characteristics but trades off thermal efficiency for simplified 5-pin routing and broader distributor availability.
Availability
SIP21106DR-26-E3 is available at Aetrix Electronics and suitable for cellular handset power rails, wireless modem RF subsystems, digital camera image sensor bias, and portable medical diagnostic sensor applications requiring stable component supply despite end-of-life status.
Supply support for SIP21106DR-26-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 is a global semiconductor manufacturer specializing in discrete power components, analog ICs, and passive devices, with emphasis on high-reliability, high-efficiency solutions for industrial, automotive, and consumer markets.
The SiP21106 series was engineered specifically for ultra-low-noise, low-quiescent-current regulation in space- and power-constrained portable electronics - targeting RF-sensitive subsystems where traditional LDOs introduce unacceptable noise coupling or thermal overhead.
FAQ
What is the maximum input voltage rating for SIP21106DR-26-E3?
The absolute maximum input voltage for SIP21106DR-26-E3 is 6.5 V relative to GND. However, the recommended operating input voltage range is 2.2 V to 6.0 V. Operation above 6.0 V risks exceeding safe power dissipation limits, especially at elevated ambient temperatures or high output currents - always verify thermal margin using the device's θJA = 294 °C/W (SC70-5L) and maximum junction temperature of 125 °C.
Does SIP21106DR-26-E3 require an external bypass capacitor on the BP pin?
Yes, SIP21106DR-26-E3 requires a 10 nF ceramic capacitor connected between the BP pin and GND to achieve its specified 60 µV(rms) output noise performance. Omitting this capacitor increases output noise to ~350 µV(rms). The BP pin is not used for stability compensation - the regulator remains stable with only 1 µF output capacitance regardless of BP capacitor presence.
How does the auto-discharge function operate in SIP21106DR-26-E3 during shutdown?
When the EN pin is pulled low (<0.4 V), SIP21106DR-26-E3 enters shutdown mode and activates an internal 100 Ω NMOS transistor between VOUT and GND. This provides a controlled discharge path: a 1 µF output capacitor discharges to <10 % of nominal voltage in under 1 ms. This prevents floating outputs that could disrupt downstream power sequencing or cause unintended device wake-up.
Can SIP21106DR-26-E3 be used with ceramic output capacitors smaller than 1 µF?
No - SIP21106DR-26-E3 requires a minimum 1 µF ceramic output capacitor (X7R or better dielectric) for guaranteed stability across the full -40 °C to +85 °C temperature range. Smaller values may cause oscillation or degraded load-transient response. The datasheet specifies stability with "6 nF/mA" capacitance, which equates to ≥0.9 µF at 150 mA; 1 µF is the validated, production-tested minimum.
Is SIP21106DR-26-E3 still in production or available for new designs?
SIP21106DR-26-E3 is End of Life (EOL) with last available purchase date of 31-Dec-2014. Aetrix Electronics maintains limited legacy inventory and supports existing production programs through lifecycle availability coordination, including traceable sourcing and volume procurement assistance - but new designs should evaluate actively produced alternatives such as TCS21106DVP-26-E3 or modern low-noise LDOs with comparable SC70 footprints.
SIP21106DR-26-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):
- 2.6V
- 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:
- SC-70-5
SIP21106DR-26-E3 FAQ
1.How can I place an order for SIP21106DR-26-E3 through Aetrix?
Please submit a Request for Quotation (RFQ) for SIP21106DR-26-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-26-E3 reliable?
The price and inventory of SIP21106DR-26-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-26-E3 is usually 5 days.
3.What payment methods are accepted for SIP21106DR-26-E3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SIP21106DR-26-E3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SIP21106DR-26-E3?
SIP21106DR-26-E3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SIP21106DR-26-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-26-E3?
For technical support, including SIP21106DR-26-E3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SIP21106DR-26-E3 requirements.
6.How does Aetrix verify that SIP21106DR-26-E3 is sourced from the original manufacturer or authorized distributors?
All SIP21106DR-26-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-26-E3 meets industry standards.
7.What is the process for return or replacement of SIP21106DR-26-E3?
All SIP21106DR-26-E3 units undergo pre-shipment inspection (PSI). If there is an issue with SIP21106DR-26-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-26-E3 part is unused and in its original packaging.
Return procedure for SIP21106DR-26-E3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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