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Vishay Siliconix SIP21107DR-28-E3
- Part No.:
- SIP21107DR-28-E3
- Manufacturer:
- Vishay Siliconix
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
SIP21107DR-28-E3.pdf
- Description:
- IC REG LINEAR 2.8V 150MA SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,827
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Product details
Overview
SIP21107DR-28-E3 from Vishay Siliconix is a 2.8 V fixed-output, 150 mA low-noise, low-dropout linear regulator with Power-OK (POK) error flag output and no external bypass capacitor requirement. It features 135 mV dropout at 150 mA, 1.0 % output voltage accuracy at 25 °C, and operates across –40 °C to +85 °C ambient temperature in SC70-5L package. It is designed for noise-sensitive portable electronics such as wireless handsets and digital cameras.
For engineers reviewing the SIP21107DR-28-E3 datasheet, SIP21107DR-28-E3 pinout, SIP21107DR-28-E3 application, or SIP21107DR-28-E3 equivalent, key selection criteria include POK functionality, ultra-low ground current (35 µA typ. at 1 mA), shutdown current <1 µA, auto-discharge capability, and compatibility with 1 µF ceramic output capacitors.
Technical Context
The SIP21107DR-28-E3 integrates a P-channel MOSFET pass transistor (0.9 Ω typical RDS(on)) and a 1.2 V bandgap reference, enabling stable regulation with minimal quiescent current. Its error amplifier compares feedback voltage against the reference to dynamically adjust gate drive and maintain output regulation under varying load and input conditions.
The POK (Power OK) function uses an open-drain NMOS output requiring an external pull-up resistor; it asserts high when VOUT reaches ≥93 % of nominal (2.604 V at 2.8 V output) and goes low during dropout, overcurrent, or thermal shutdown. The device includes internal short-circuit protection (330 mA typical) and thermal shutdown at 160 °C with 20 °C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.8 V ±2.5 % over –40 °C to +85 °C - ensures stable core supply for 2.8 V logic rails without external resistors. |
| Dropout Voltage | 135 mV at 150 mA load - enables operation down to VIN = 2.935 V while maintaining regulation, extending battery runtime in single-cell Li-ion systems. |
| Ground Current | 35 µA typical at 1 mA load - minimizes standby power loss in always-on subsystems like RF receivers or real-time clocks. |
| Shutdown Current | ≤1 µA at 85 °C - supports deep-sleep modes in portable devices with negligible battery drain during extended idle periods. |
| Output Noise | 350 µVrms (10 Hz–100 kHz) - meets noise requirements for analog front-ends and RF power amplifiers without external BP capacitor. |
| POK Threshold | 93 % of VOUT (2.604 V) with 1.5 % hysteresis - provides reliable power-good signaling for microcontroller reset sequencing and system-level fault detection. |
| Auto-Discharge Resistance | 100 Ω typical - discharges 1 µF output capacitor to <100 mV in <1 ms after shutdown, preventing residual voltage from interfering with downstream circuitry. |
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 | 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; must not float. |
| 2 (GND) | Ground reference and thermal path | Primary return for all currents; requires direct connection to large PCB ground plane for thermal dissipation and noise immunity. |
| 3 (VIN) | Input supply | Accepts 2.2 V to 6.0 V; requires 1 µF ceramic bypass capacitor close to pin to suppress input ripple and improve transient response. |
| 4 (VOUT) | Regulated output | Delivers 2.8 V at up to 150 mA; stable with ≥1 µF ceramic output capacitor; connects directly to load and local decoupling. |
| 5 (POK) | Open-drain Power-OK flag | Asserts low during undervoltage, overcurrent, or thermal fault; requires external pull-up to VIN or VOUT for logic-level interfacing. |
Key Features
| Feature | Design Value |
|---|---|
| No external noise bypass capacitor required | Eliminates BP pin and 10 nF capacitor, reducing BOM count and board area versus SiP21106 variants. |
| Integrated POK (Power OK) output | Provides system-level power monitoring and reset coordination without external comparators or voltage dividers. |
| Auto-discharge on shutdown | 100 Ω internal NMOS pulls VOUT to GND within 1 ms, preventing back-powering or latch-up in multi-rail systems. |
| Low ground current at light load | 35 µA typical at 1 mA enables >1-year battery life in low-duty-cycle IoT sensors with intermittent wake-up. |
| Thermal and short-circuit protection | 160 °C shutdown with 20 °C hysteresis and 330 mA current limit ensure robustness in unattended or harsh-environment deployments. |
Applications
| Wireless Handset RF Subsystem | Digital Camera Image Sensor Bias |
|---|---|
Use Scenario: Powering RF transceiver LNA and mixer stages in GSM/UMTS handsets where supply noise directly impacts EVM and adjacent channel leakage. IC Role / Device Role / Timing Role: Low-noise 2.8 V bias regulator delivering clean DC to analog RF blocks; POK signals ready state to baseband processor before transmission. Use Value: 350 µVrms noise avoids degradation of receiver sensitivity; POK eliminates need for external supervisor IC in compact handset layouts. | Use Scenario: Supplying image sensor analog core and ADC reference in compact digital cameras with strict size constraints. IC Role / Device Role / Timing Role: Primary 2.8 V LDO for sensor analog rail; auto-discharge clears residual voltage before sensor reset sequence. Use Value: SC70-5L footprint saves space vs. larger packages; 100 Ω discharge path ensures <1 ms VOUT decay, meeting sensor datasheet tDISCH requirements. |
| Portable Medical Pulse Oximeter | Industrial Wireless Sensor Node |
Use Scenario: Powering photodiode amplifier and analog signal chain in battery-operated pulse oximeters requiring ultra-low EMI and long runtime. IC Role / Device Role / Timing Role: Low-noise, low-quiescent regulator for analog front-end; POK validates stable supply before optical measurement cycle begins. Use Value: 35 µA ground current extends coin-cell battery life beyond 6 months; POK prevents false readings due to brown-out during LED pulsing. | Use Scenario: Providing regulated 2.8 V to sub-GHz RF SoC and precision ADC in battery-powered industrial condition monitors. IC Role / Device Role / Timing Role: Main system LDO with integrated fault reporting; shutdown mode reduces system sleep current to <1 µA. Use Value: POK interface simplifies firmware-driven power health checks; thermal protection prevents field failures in enclosed enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-2802E/TT | 250 mA output, 1.6 µA quiescent current, no POK output, SOT-23-3 package | Lacks power-good signaling; requires external supervision for reset coordination | Select when lowest quiescent current is critical and POK is unnecessary. |
| Torex XC6206P282MR-G | 150 mA output, 3 µA quiescent current, no POK, SOT-25 package, 2 % accuracy | Higher output tolerance and no fault flag; smaller quiescent current but no system-level monitoring | Select for ultra-low-power sensor nodes where POK is handled externally or omitted. |
Compared with MCP1700T-2802E/TT and XC6206P282MR-G, the SIP21107DR-28-E3 uniquely integrates POK functionality and auto-discharge in SC70-5L, enabling simpler, more reliable power sequencing in space-constrained portable designs without adding discrete supervision components.
Availability
SIP21107DR-28-E3 is available at Aetrix Electronics and suitable for wireless handsets, digital cameras, and portable medical devices requiring stable component supply despite end-of-life status.
Supply support for SIP21107DR-28-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 devices, analog ICs, and passive components, with emphasis on reliability and performance in demanding environments.
The SiP21107 series belongs to Vishay's low-noise, low-dropout LDO family designed specifically for battery-powered portable electronics requiring precise voltage regulation, fast transient response, and integrated fault monitoring.
FAQ
What is the POK (Power OK) threshold voltage for SIP21107DR-28-E3?
The SIP21107DR-28-E3 POK output transitions high when VOUT reaches ≥93 % of its nominal value (≥2.604 V for 2.8 V output) and goes low when VOUT falls below this threshold by 1.5 % hysteresis. This behavior is guaranteed across –40 °C to +85 °C ambient temperature and supports reliable system power sequencing in the SIP21107DR-28-E3 design.
Does SIP21107DR-28-E3 require an external bypass capacitor?
No, the SIP21107DR-28-E3 does not require an external noise bypass capacitor. Unlike the SiP21106 variant, the SIP21107DR-28-E3 omits the BP pin and is optimized for low-noise operation without external capacitance, simplifying layout and reducing component count while maintaining 350 µVrms output noise (10 Hz–100 kHz).
What is the maximum continuous output current for SIP21107DR-28-E3?
The SIP21107DR-28-E3 delivers up to 150 mA continuously under recommended operating conditions (VIN = 2.2 V to 6.0 V, TA = –40 °C to +85 °C). Its internal current limit is 330 mA typical, allowing brief peak loads during startup or transient events without damage, as confirmed in the SIP21107DR-28-E3 datasheet specifications.
How does the auto-discharge feature work in SIP21107DR-28-E3?
When the EN pin is pulled low, the SIP21107DR-28-E3 enters shutdown mode and activates an internal 100 Ω NMOS discharge path between VOUT and GND. This discharges a 1 µF output capacitor to <100 mV in under 1 ms, preventing residual voltage from interfering with downstream logic or causing unintended wake-up-critical for proper operation of the SIP21107DR-28-E3 in multi-rail systems.
Is SIP21107DR-28-E3 still in production?
No, the SIP21107DR-28-E3 is End of Life per Vishay documentation (Last Available Purchase Date: 31-Dec-2014). However, Aetrix Electronics maintains legacy inventory and provides lifecycle availability coordination, including traceable sourcing and BOM continuity management, to support ongoing production of systems relying on the SIP21107DR-28-E3.
SIP21107DR-28-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):
- 2.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.22V @ 150mA
- 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:
- SC-70-5
SIP21107DR-28-E3 FAQ
1.How can I place an order for SIP21107DR-28-E3 through Aetrix?
Please submit a Request for Quotation (RFQ) for SIP21107DR-28-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 SIP21107DR-28-E3 reliable?
The price and inventory of SIP21107DR-28-E3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SIP21107DR-28-E3 is usually 5 days.
3.What payment methods are accepted for SIP21107DR-28-E3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SIP21107DR-28-E3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SIP21107DR-28-E3?
SIP21107DR-28-E3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SIP21107DR-28-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 SIP21107DR-28-E3?
For technical support, including SIP21107DR-28-E3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SIP21107DR-28-E3 requirements.
6.How does Aetrix verify that SIP21107DR-28-E3 is sourced from the original manufacturer or authorized distributors?
All SIP21107DR-28-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 SIP21107DR-28-E3 meets industry standards.
7.What is the process for return or replacement of SIP21107DR-28-E3?
All SIP21107DR-28-E3 units undergo pre-shipment inspection (PSI). If there is an issue with SIP21107DR-28-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 SIP21107DR-28-E3 part is unused and in its original packaging.
Return procedure for SIP21107DR-28-E3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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