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Vishay Siliconix SIP21107DR-25-E3
- Part No.:
- SIP21107DR-25-E3
- Manufacturer:
- Vishay Siliconix
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
SIP21107DR-25-E3.pdf
- Description:
- IC REG LINEAR 2.5V 150MA SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,498
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Product details
Overview
SIP21107DR-25-E3 from Vishay Siliconix is a 2.5 V fixed-output, 150 mA low-noise LDO voltage regulator in SC70-5L package with Power OK (POK) error flag output and no external noise bypass capacitor required. It features 135 mV dropout at 150 mA, ±2.5 % output accuracy over -40 °C to +85 °C, and 35 µA ground current at 1 mA load - optimized for battery-powered RF and portable electronics.
For engineers reviewing the SIP21107DR-25-E3 datasheet, SIP21107DR-25-E3 pinout, SIP21107DR-25-E3 application, or SIP21107DR-25-E3 equivalent, key selection criteria include POK functionality, SC70-5L footprint compatibility, dropout performance under 150 mA load, shutdown current <1 µA, and stable operation with 1 µF ceramic output capacitance.
Technical Context
The SIP21107DR-25-E3 uses an internal P-channel MOSFET pass transistor (0.9 Ω typical RDS(on)) and a 1.2 V bandgap reference to regulate output voltage. Its error amplifier compares feedback against reference and drives the PMOS gate to maintain regulation, enabling ultra-low quiescent current and fast transient response.
It integrates open-drain POK (Power OK) logic that asserts low when VOUT falls below 90–96 % of nominal (configurable per output voltage), requires external pull-up, and responds within 40 µs. Shutdown mode activates via EN pin <0.4 V, enabling auto-discharge through 100 Ω internal NMOS.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.5 V ±2.5 % over full temperature range (-40 °C to +85 °C) |
| Dropout Voltage | 135 mV at 150 mA load - enables regulation down to VIN = 2.635 V |
| Ground Current | 35 µA typical at 1 mA load - extends battery life in standby |
| Shutdown Current | ≤1 µA at 85 °C - minimizes leakage during system sleep |
| POK Threshold | 90–96 % of VOUT (rising edge), with 1.5 % hysteresis - ensures reliable power-good assertion |
| Output Noise | 350 µVrms (10 Hz–100 kHz) - suitable for noise-sensitive analog/RF circuits without BP cap |
| Thermal Protection | 160 °C junction shutdown with 20 °C hysteresis - prevents damage during overload |
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 regulator; ≤0.4 V disables with auto-discharge |
| 2 (GND) | Ground reference | Electrical and thermal return path; must connect to large copper plane for thermal management |
| 3 (VIN) | Input supply | Accepts 2.2–6.0 V; requires 1 µF ceramic bypass to GND near pin |
| 4 (VOUT) | Regulated output | Delivers 2.5 V at up to 150 mA; stable with ≥1 µF ceramic output capacitor |
| 5 (POK) | Open-drain error flag | Drives low when VOUT is out-of-tolerance; requires external pull-up to VIN or VOUT |
Key Features
| Feature | Design Value |
|---|---|
| No external noise bypass capacitor required | Enables compact layout and eliminates BP capacitor placement/selection overhead for SIP21107 variant |
| Integrated Power OK (POK) flag | Provides system-level power monitoring without external supervisor IC or comparator circuitry |
| Auto-discharge on shutdown | 100 Ω internal NMOS discharges 1 µF output cap in <1 ms - prevents residual voltage holdup |
| Low 35 µA ground current at light load | Reduces battery drain in always-on subsystems such as real-time clocks or sensor interfaces |
| Short-circuit and thermal protection | 330 mA current limit and 160 °C thermal shutdown ensure robustness in fault conditions |
Applications
| Cellular Phone Baseband | Wireless Modem RF Front-End |
|---|---|
Use Scenario: Powering baseband processor I/O or memory interface requiring clean, stable 2.5 V rail. IC Role / Device Role / Timing Role: Primary LDO delivering regulated 2.5 V with POK confirmation to enable processor boot sequence. Use Value: POK signal synchronizes reset release with valid VOUT, preventing firmware lockup during brown-out recovery. | Use Scenario: Supplying low-noise bias to RF transceiver ICs in LTE/Wi-Fi modems. IC Role / Device Role / Timing Role: Low-noise LDO providing 2.5 V to RF synthesizer and mixer blocks. Use Value: 350 µVrms noise avoids phase noise degradation in local oscillator paths. |
| Digital Camera Image Sensor Bias | PDA Application Processor Core |
Use Scenario: Powering CMOS image sensor analog front-end where supply ripple induces fixed-pattern noise. IC Role / Device Role / Timing Role: Dedicated LDO supplying 2.5 V to sensor analog chain with POK-driven initialization handshake. Use Value: POK assertion confirms rail stability before sensor exposure timing begins, eliminating capture artifacts. | Use Scenario: Providing core voltage to ARM-based application processors in handheld PDAs. IC Role / Device Role / Timing Role: Secondary LDO delivering 2.5 V to processor I/O domain with auto-discharge during suspend-to-RAM. Use Value: 100 Ω discharge path clears VOUT rapidly, ensuring clean state restoration on wake-up. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-2502E/TT | 250 mA rating, 1.6 µA quiescent current, no POK pin, SOT-23-3 package | Lacks power-good signaling; requires external supervisor for boot sequencing | Select when POK is unnecessary and lower IQ dominates design priority |
| TCS21107DVP-25-E3 | Same family, TSC75-6L package (1.6 mm × 1.6 mm), adds NC pin; identical electrical specs | Smaller footprint but different pinout (6-pin vs 5-pin); requires PCB redesign | Select when board space is critical and layout revision is feasible |
Compared with MCP1700T-2502E/TT and TCS21107DVP-25-E3, SIP21107DR-25-E3 uniquely delivers POK functionality in the smallest standard 5-pin SC70 package while maintaining 150 mA capability and 35 µA ground current - making it optimal for space-constrained, boot-critical portable designs.
Availability
SIP21107DR-25-E3 is available at Aetrix Electronics and suitable for cellular phones, wireless modems, and digital cameras requiring stable component supply despite end-of-life status.
Supply support for SIP21107DR-25-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 components and power ICs, with leadership in MOSFETs, diodes, optoelectronics, and precision analog devices.
The SiP2110x series was designed specifically for ultra-low-power, noise-sensitive portable electronics - emphasizing minimal quiescent current, fast startup, integrated fault signaling, and compatibility with tiny ceramic capacitors.
FAQ
What is the minimum input voltage required for SIP21107DR-25-E3 to maintain regulation at full 150 mA load?
The SIP21107DR-25-E3 requires a minimum input voltage of 2.635 V to sustain 2.5 V output at 150 mA, based on its 135 mV dropout specification. Below this, the device enters dropout and output voltage declines linearly with input. The absolute minimum VIN is 2.2 V per datasheet limits, but regulation is not guaranteed below 2.635 V under full load.
Does SIP21107DR-25-E3 require an external pull-up resistor on the POK pin, and what value is recommended?
Yes, SIP21107DR-25-E3 requires an external pull-up resistor on the POK pin because it is an open-drain NMOS output. A 10 kΩ to 100 kΩ resistor to VIN (or VOUT) is recommended; 47 kΩ is commonly used to balance speed (<1 µs rise time) and current consumption (<0.1 mA). The POK sinks up to 0.5 mA when asserted low.
Can SIP21107DR-25-E3 be used with only a 1 µF output capacitor, and is it stable across temperature?
Yes, SIP21107DR-25-E3 is fully stable with a single 1 µF X7R ceramic output capacitor across -40 °C to +85 °C. The datasheet explicitly states stable operation with "very small ceramic output capacitors" and specifies 1 µF as the standard COUT value in all typical application circuits. Z5U/Y5V dielectrics are discouraged due to ESR drift.
What happens to the output of SIP21107DR-25-E3 when the EN pin is pulled low?
When EN is pulled low (<0.4 V), SIP21107DR-25-E3 enters shutdown mode: the pass transistor turns off, ground current drops to ≤1 µA, and the internal 100 Ω NMOS automatically discharges VOUT to GND. This ensures rapid, controlled power-down without floating rails - critical for systems requiring deterministic reset behavior.
Is SIP21107DR-25-E3 still manufacturable, and what is its lifecycle status?
SIP21107DR-25-E3 is End of Life (EOL) per Vishay documentation (Last Available Purchase Date: 31-Dec-2014). No new production occurs, but Aetrix Electronics maintains legacy inventory with traceable sourcing and supports lifecycle coordination including last-time buys, cross-reference guidance, and obsolescence mitigation planning for active designs.
SIP21107DR-25-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):
- 2.5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.3V @ 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-25-E3 FAQ
1.How can I place an order for SIP21107DR-25-E3 through Aetrix?
Please submit a Request for Quotation (RFQ) for SIP21107DR-25-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-25-E3 reliable?
The price and inventory of SIP21107DR-25-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-25-E3 is usually 5 days.
3.What payment methods are accepted for SIP21107DR-25-E3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SIP21107DR-25-E3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SIP21107DR-25-E3?
SIP21107DR-25-E3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SIP21107DR-25-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-25-E3?
For technical support, including SIP21107DR-25-E3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SIP21107DR-25-E3 requirements.
6.How does Aetrix verify that SIP21107DR-25-E3 is sourced from the original manufacturer or authorized distributors?
All SIP21107DR-25-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-25-E3 meets industry standards.
7.What is the process for return or replacement of SIP21107DR-25-E3?
All SIP21107DR-25-E3 units undergo pre-shipment inspection (PSI). If there is an issue with SIP21107DR-25-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-25-E3 part is unused and in its original packaging.
Return procedure for SIP21107DR-25-E3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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