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Vishay Siliconix SIP21107DR-285-E3
- Part No.:
- SIP21107DR-285-E3
- Manufacturer:
- Vishay Siliconix
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
SIP21107DR-285-E3.pdf
- Description:
- IC REG LINEAR 2.85V 150MA SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,210
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Product details
Overview
SIP21107DR-285-E3 from Vishay Siliconix is a 2.85 V fixed-output, 150 mA low-noise, low-dropout linear regulator with Power-OK (POK) error flag and auto-discharge functionality. 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. Designed for noise-sensitive portable electronics, it delivers stable regulation using only 1 µF ceramic output capacitance.
For engineers reviewing the SIP21107DR-285-E3 datasheet, SIP21107DR-285-E3 pinout, SIP21107DR-285-E3 application, or SIP21107DR-285-E3 equivalent, key selection criteria include POK threshold behavior (93 % nominal), shutdown current (<1 µA at 85 °C), ground current (35 µA typ. at 1 mA), thermal protection (160 °C trip), and SC70-5L package compatibility with space-constrained PCB layouts.
Technical Context
The SIP21107DR-285-E3 employs a P-channel MOSFET pass transistor (0.9 Ω typical RDS(on)) and a 1.2 V bandgap reference to achieve precise output regulation. Its error amplifier compares feedback voltage against the internal reference and drives the pass gate to maintain output stability under varying load and line conditions.
It integrates an open-drain POK comparator monitoring VOUT relative to VIN, with active-high assertion at ≥93 % of nominal output and hysteresis of 1.5 %, plus an internal 100 Ω NMOS discharge path activated during EN = low to fully discharge COUT in <1 ms.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.85 V ±2.5 % over full temperature range; enables direct replacement of 2.8 V/2.85 V logic rails without external resistors. |
| Dropout Voltage | 135 mV at 150 mA load; allows operation down to VIN = 2.985 V while maintaining regulation - critical for single-cell Li-ion or alkaline battery systems. |
| Output Noise | 350 µV(rms) (10 Hz–100 kHz); higher than SiP21106 due to absence of BP pin, but still suitable for RF biasing and analog sensor supplies where POK monitoring is prioritized. |
| POK Threshold | 93 % nominal VOUT (rising edge); ensures reliable power-good signaling before downstream circuitry powers up, with 1.5 % hysteresis preventing chatter near threshold. |
| Shutdown Current | ≤1 µA maximum at 85 °C; minimizes battery drain in standby mode for always-on portable devices like pagers and wireless modems. |
| Auto-Discharge Resistance | 100 Ω typical; discharges 1 µF output capacitor to <10 % VOUT in <1 ms upon shutdown - prevents residual voltage from interfering with system reset sequencing. |
| Thermal Shutdown | 160 °C junction trip point with 20 °C hysteresis; provides robust fault protection during sustained overload or poor PCB thermal design without latch-up. |
Pinout & Package
Package: SC70-5L (2.1 mm × 2.1 mm × 0.95 mm), RoHS-compliant, industrial temperature grade (-40 °C to +85 °C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - EN | Enable input | Active-high logic control; device enabled when >1.2 V applied, disabled when <0.4 V; must not be left floating - tie to VIN if unused. |
| 2 - GND | Ground reference and thermal path | Electrical return and primary heat dissipation node; requires direct connection to large copper plane for thermal derating compliance. |
| 3 - VIN | Input supply | Accepts 2.2–6.0 V input; bypassed with 1 µF ceramic capacitor to suppress high-frequency noise and improve line transient response. |
| 4 - VOUT | Regulated output | Delivers 2.85 V ±2.5 %; stable with ≥1 µF low-ESR ceramic capacitor; supports peak 330 mA short-circuit current without damage. |
| 5 - POK | Open-drain Power-OK flag | Drives low when VOUT falls below 93 % of nominal; requires external pull-up to VIN or VOUT; sinks ≤0.5 mA; signals valid power to host controller or PMIC. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated POK error flag | Eliminates need for external supervisor IC in battery-powered systems requiring deterministic power sequencing and fault detection. |
| No noise-bypass capacitor required | Reduces BOM count and board area vs. SiP21106; simplifies layout by removing BP pin and associated 10 nF capacitor. |
| Auto-discharge on shutdown | Ensures clean power-down state for downstream logic; avoids hold-up voltage issues in multi-rail systems without discrete discharge FETs. |
| Ultra-low ground current | 35 µA typical at 1 mA load extends battery life in low-duty-cycle applications such as remote sensors and pager standby modes. |
| Robust protection suite | Combines 330 mA current limit, thermal shutdown (160 °C), and short-circuit tolerance - enables reliable operation in unregulated or noisy supply environments. |
Applications
| Cellular Handsets | Wireless Modems |
|---|---|
|
Use Scenario: Powering RF transceiver bias rails and baseband processor I/O supplies in dual-mode GSM/EDGE handsets. IC Role / Device Role / Timing Role: Low-noise LDO providing clean 2.85 V for sensitive analog front-end circuitry with real-time POK confirmation prior to RF activation. Use Value: POK signal synchronizes RF power-up sequence with stable supply, preventing transmit distortion or calibration errors caused by premature enablement. |
Use Scenario: Supplying 2.85 V to USB PHY and packet processor in embedded LTE/Wi-Fi modems operating from shared 3.3 V or Li-ion sources. IC Role / Device Role / Timing Role: Regulator with integrated POK flag enabling host MCU to verify modem power integrity before initiating enumeration or firmware load. Use Value: Eliminates need for external voltage monitor, reducing component count and ensuring deterministic boot readiness detection. |
| Digital Cameras | PDAs |
|
Use Scenario: Delivering regulated 2.85 V to image sensor analog core and ADC reference in compact digital still/video cameras. IC Role / Device Role / Timing Role: Low-dropout regulator supporting fast wake-from-sleep transitions with auto-discharge ensuring rapid sensor reset between capture bursts. Use Value: 135 mV dropout enables use with partially discharged batteries; 100 Ω discharge path clears residual charge before next exposure cycle. |
Use Scenario: Powering 2.85 V logic rails for touch controller, flash memory interface, and display driver in handheld PDAs with tight thermal constraints. IC Role / Device Role / Timing Role: Compact SC70-5L LDO with thermal protection and POK monitoring for safe operation in thermally dense handheld enclosures. Use Value: 160 °C thermal shutdown prevents overheating during extended backlight or CPU activity; POK confirms rail stability before display initialization. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1826T-285I/OT | 2.85 V fixed output, 300 mA rating, 250 mV dropout at 300 mA, no POK pin, 65 µV(rms) noise | Lacks POK flag and auto-discharge; better noise performance but requires external supervision for power sequencing | Select when higher current capability and lower noise are prioritized over integrated fault signaling and clean shutdown. |
| TLC7703QDBVRQ1 | 2.85 V fixed output, 150 mA rating, 200 mV dropout at 150 mA, integrated reset timer (not POK), 1.5 µA quiescent current | Provides reset timeout instead of real-time POK; no auto-discharge; automotive-grade (-40 °C to +125 °C) | Select for automotive infotainment modules needing AEC-Q100 qualification and reset timing, not real-time power-good monitoring. |
Compared with MCP1826T-285I/OT and TLC7703QDBVRQ1, SIP21107DR-285-E3 uniquely combines POK flag, 100 Ω auto-discharge, and SC70-5L footprint - making it optimal for portable consumer devices requiring compact, sequenced, and cleanly shut-down power delivery.
Availability
SIP21107DR-285-E3 is available at Aetrix Electronics and suitable for cellular handsets, wireless modems, and digital cameras requiring stable component supply despite its End-of-Life status per Vishay's 31-Dec-2014 last purchase date.
Supply support for SIP21107DR-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 SiP21107 series belongs to Vishay's low-noise, low-IQ LDO family targeting battery-powered portable electronics; it was engineered to replace discrete supervisor + LDO combinations with integrated POK and auto-discharge in ultra-small packages.
FAQ
What is the POK threshold voltage for SIP21107DR-285-E3?
The POK threshold for SIP21107DR-285-E3 is defined as 93 % of nominal VOUT (2.65 V) during rising output voltage, with 1.5 % hysteresis. This means POK asserts high when VOUT reaches ≥2.65 V and de-asserts low when VOUT falls below ~2.61 V. The specification is guaranteed across -40 °C to +85 °C ambient temperature and applies directly to the SIP21107DR-285-E3 device.
Does SIP21107DR-285-E3 require an external pull-up resistor on the POK pin?
Yes, SIP21107DR-285-E3 requires an external pull-up resistor on the POK pin because it is an open-drain NMOS output. The resistor must connect to either VIN or VOUT and be sized to ensure proper logic levels while limiting sink current to ≤0.5 mA. Typical values range from 10 kΩ to 100 kΩ depending on bus capacitance and rise-time requirements. This requirement is explicitly defined in the SIP21107DR-285-E3 datasheet and applies to all SiP21107 variants.
What is the maximum allowable input voltage for SIP21107DR-285-E3?
The absolute maximum input voltage for SIP21107DR-285-E3 is 6.5 V, but the recommended operating range is 2.2 V to 6.0 V. Operation above 6.0 V risks exceeding safe power dissipation limits, especially in the SC70-5L package, which has a θJA of 294 °C/W. For reliable long-term operation at full load, VIN should remain ≤5.5 V when ambient temperature exceeds 70 °C, per the derating curve in the SIP21107DR-285-E3 datasheet.
Can SIP21107DR-285-E3 be used with ceramic output capacitors smaller than 1 µF?
No - SIP21107DR-285-E3 requires a minimum 1 µF ceramic output capacitor for guaranteed stability across the full -40 °C to +85 °C temperature range. The datasheet specifies stability with "6 nF/mA" capacitance, equating to ≥0.9 µF at 150 mA, but recommends ≥1 µF to accommodate ESR variation and parasitic effects. Using less than 1 µF may cause oscillation or degraded load-transient response, and this requirement is confirmed for the SIP21107DR-285-E3 in its specific SC70-5L configuration.
Is SIP21107DR-285-E3 still in production?
No - SIP21107DR-285-E3 is End-of-Life per Vishay document 74442 Rev. G (08-Jun-09), with Last Available Purchase Date of 31-Dec-2014. Aetrix Electronics maintains legacy inventory and offers lifecycle coordination support, but new design-ins should consider qualified alternatives. All technical specifications and application guidance provided here apply specifically to the SIP21107DR-285-E3 as manufactured and characterized prior to EOL.
SIP21107DR-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:
- 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-285-E3 FAQ
1.How can I place an order for SIP21107DR-285-E3 through Aetrix?
Please submit a Request for Quotation (RFQ) for SIP21107DR-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 SIP21107DR-285-E3 reliable?
The price and inventory of SIP21107DR-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 SIP21107DR-285-E3 is usually 5 days.
3.What payment methods are accepted for SIP21107DR-285-E3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SIP21107DR-285-E3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SIP21107DR-285-E3?
SIP21107DR-285-E3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SIP21107DR-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 SIP21107DR-285-E3?
For technical support, including SIP21107DR-285-E3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SIP21107DR-285-E3 requirements.
6.How does Aetrix verify that SIP21107DR-285-E3 is sourced from the original manufacturer or authorized distributors?
All SIP21107DR-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 SIP21107DR-285-E3 meets industry standards.
7.What is the process for return or replacement of SIP21107DR-285-E3?
All SIP21107DR-285-E3 units undergo pre-shipment inspection (PSI). If there is an issue with SIP21107DR-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 SIP21107DR-285-E3 part is unused and in its original packaging.
Return procedure for SIP21107DR-285-E3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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