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Vishay Siliconix SIP21107DR-18-E3
- Part No.:
- SIP21107DR-18-E3
- Manufacturer:
- Vishay Siliconix
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
SIP21107DR-18-E3.pdf
- Description:
- IC REG LINEAR 1.8V 150MA SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,916
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Product details
Overview
SIP21107DR-18-E3 from Vishay Siliconix is a 150-mA, low-noise, low-dropout linear regulator with fixed 1.8 V output, Power-OK (POK) error flag, and no external noise bypass capacitor required. 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 for portable RF power rails in cellular handsets and wireless modems.
For engineers reviewing the SIP21107DR-18-E3 datasheet, SIP21107DR-18-E3 pinout, SIP21107DR-18-E3 application, or SIP21107DR-18-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 in SC70-5L packaging.
Technical Context
The SIP21107DR-18-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 the reference and drives the PMOS gate to maintain regulation under load transients up to 330 mA peak.
It integrates open-drain POK monitoring with 93 % nominal threshold (VOUT rising), 1.5 % hysteresis, and 40 µs delay from VOUT to POK assertion. Shutdown mode activates via EN pin (<0.4 V), enabling auto-discharge through a 100 Ω internal NMOS and reducing supply current to ≤1 µA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8 V ±2.5 % over –40 °C to +85 °C - ensures stable core bias for low-voltage microcontrollers and RF ICs. |
| Dropout Voltage | 135 mV at 150 mA load - enables operation from 2.0 V input while maintaining regulation, extending battery runtime in single-cell Li-ion systems. |
| Ground Current | 35 µA typical at 1 mA load - minimizes quiescent drain during light-load standby, critical for always-on sensor nodes. |
| POK Threshold | 93 % of VOUT (rising), 91 % (falling) - provides precise power-good signaling for system sequencers without external comparators. |
| Shutdown Current | ≤1 µA at 85 °C - guarantees negligible battery leakage during deep sleep modes in portable devices. |
| Output Noise | 350 µVrms (10 Hz–100 kHz) - meets noise-sensitive analog/RF supply requirements without BP capacitor overhead. |
| Auto-Discharge | 100 Ω internal NMOS - discharges 1 µF output cap to <100 mV in <1 ms upon shutdown, preventing back-powering of upstream circuitry. |
Pinout & Package
SC70-5L package (2.1 mm × 2.1 mm × 0.95 mm), RoHS-compliant, rated for industrial temperature range (–40 °C to +85 °C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - EN | Enable control input | Active-high logic; <0.4 V disables regulator and triggers auto-discharge; connect to VIN for always-on operation. |
| 2 - GND | Power ground reference | Primary thermal path; must be connected to large PCB ground plane for thermal management and noise immunity. |
| 3 - VIN | Input supply rail | Accepts 2.2 V to 6.0 V; requires ≥1 µF low-ESR ceramic bypass capacitor placed adjacent to pin. |
| 4 - VOUT | Regulated output | Delivers 1.8 V at up to 150 mA; stable with ≥1 µF ceramic output capacitor; supports fast load transients. |
| 5 - POK | Open-drain Power-OK flag | Requires external pull-up to VIN or VOUT; sinks current when VOUT falls below threshold, signaling fault condition. |
Key Features
| Feature | Design Value |
|---|---|
| No external noise bypass capacitor needed | Eliminates 10 nF BP capacitor requirement versus SiP21106, simplifying BOM and layout for space-constrained designs. |
| Integrated POK error flag | Provides system-level power sequencing and fault detection without external supervisor IC or discrete comparator. |
| Auto-discharge on shutdown | Internally discharges VOUT to ground via 100 Ω NMOS, preventing unintended biasing of downstream circuits. |
| Stable with 1 µF ceramic output capacitor | Reduces board area and cost versus tantalum or larger ceramics; supports Z5U/Y5V dielectrics with ≥2.2 µF for full temp range. |
| Thermal and short-circuit protection | Shuts down at 160 °C junction temperature and limits output current to 330 mA typical, ensuring robustness in fault conditions. |
Applications
| Cellular Handset RF Power Rail | Wireless Modem Baseband Core Supply |
|---|---|
Use Scenario: Powers RF transceiver LNA and mixer stages in GSM/UMTS handsets where supply noise directly impacts EVM and adjacent channel rejection. IC Role / Device Role / Timing Role: Low-noise LDO delivering clean 1.8 V bias; POK signals readiness to baseband processor before RF activation. Use Value: 350 µVrms noise avoids degradation of RF signal integrity; 135 mV dropout enables use of depleted 3.0 V Li-ion cells. | Use Scenario: Supplies 1.8 V core voltage to baseband SoC in LTE modems requiring tight voltage tolerance and fast transient response during burst data transmission. IC Role / Device Role / Timing Role: Primary core regulator with POK used for hardware reset synchronization and brown-out detection. Use Value: 1.0 % initial accuracy and <2.5 % variation over temperature ensure reliable CPU operation; auto-discharge prevents latch-up during power cycling. |
| Digital Camera Image Sensor Bias | PDA Application Processor I/O Supply |
Use Scenario: Provides quiet 1.8 V bias to CMOS image sensor analog front-end, where supply ripple causes fixed-pattern noise in captured images. IC Role / Device Role / Timing Role: Dedicated low-noise LDO with POK confirming stable rail prior to sensor initialization sequence. Use Value: No BP capacitor reduces component count; POK eliminates need for external voltage monitor, saving PCB real estate. | Use Scenario: Supplies 1.8 V I/O voltage to application processor in PDAs with multi-rail power sequencing and battery life optimization requirements. IC Role / Device Role / Timing Role: Secondary regulated rail enabled only after main core voltage is valid, using POK as enable trigger. Use Value: 35 µA ground current at 1 mA load extends standby time; SC70-5L footprint fits high-density handheld layouts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-1802E/TT | 300 mA output, 600 mV dropout at 250 mA, no POK pin, 1.8 V fixed, SOT-23-3 | Lacks POK functionality and auto-discharge; requires external discharge circuit for same behavior | Select when higher output current is needed and POK is handled externally or not required. |
| TCS2117-180MV | 150 mA output, 220 mV dropout at 150 mA, POK with 95 % threshold, SC70-5 | Higher dropout and tighter POK threshold; slightly lower ground current (25 µA typ.) | Select when stricter POK accuracy is required and higher dropout is acceptable in system margin. |
Compared with MCP1700T-1802E/TT and TCS2117-180MV, SIP21107DR-18-E3 offers optimal balance of ultra-low dropout (135 mV), integrated POK with hysteresis, and auto-discharge-enabling simpler, more reliable power sequencing in compact portable electronics without adding discrete components.
Availability
SIP21107DR-18-E3 is available at Aetrix Electronics and suitable for cellular handsets, wireless modems, and digital cameras requiring stable component supply despite end-of-life status.
Supply support for SIP21107DR-18-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 MOSFETs, diodes, optoelectronics, and precision analog ICs.
The SiP21107 series was designed specifically for low-power, noise-sensitive portable electronics requiring integrated power-good signaling and minimal external components in ultra-small packages.
FAQ
What is the POK threshold voltage for SIP21107DR-18-E3?
The POK threshold for SIP21107DR-18-E3 is defined as a percentage of VOUT: 93 % nominal (90–96 % min/max) when VOUT is rising, and 91 % when VOUT is falling for outputs ≥2.2 V. For the 1.8 V version, guaranteed functionality applies but exact threshold is specified per device characterization. SIP21107DR-18-E3 uses this POK signal to indicate valid regulation without external supervision.
Does SIP21107DR-18-E3 require an external bypass capacitor?
No, SIP21107DR-18-E3 does not require an external noise bypass capacitor. Unlike the SiP21106 variant, the SiP21107 architecture eliminates the BP pin dependency, achieving 350 µVrms output noise (10 Hz–100 kHz) without a 10 nF capacitor. This simplifies design and reduces bill-of-materials cost for SIP21107DR-18-E3 implementations.
What is the maximum output current and thermal limit for SIP21107DR-18-E3?
SIP21107DR-18-E3 delivers up to 150 mA continuous output current with short-circuit protection limiting peak current to 330 mA typical. Thermal shutdown activates at 160 °C junction temperature, with 20 °C hysteresis. The SC70-5L package has θJA = 294 °C/W, so derating is required above 70 °C ambient to maintain ≤125 °C max junction temperature. SIP21107DR-18-E3 includes these protections to ensure safe operation under overload.
How does the auto-discharge function work on SIP21107DR-18-E3?
When the EN pin is pulled low, SIP21107DR-18-E3 enters shutdown mode and activates an internal 100 Ω NMOS between VOUT and GND. This discharges a 1 µF output capacitor to <100 mV in under 1 ms, preventing back-powering of upstream circuitry or latch-up in interconnected rails. SIP21107DR-18-E3 implements this fully internally-no external components are needed to achieve rapid, controlled discharge.
Is SIP21107DR-18-E3 still in production or available for new designs?
SIP21107DR-18-E3 is End of Life per Vishay documentation (Last Available Purchase Date: 31-Dec-2014). However, Aetrix Electronics maintains legacy inventory and supports continuity programs including last-time buys, cross-reference assistance, and technical migration guidance for SIP21107DR-18-E3 replacement in existing designs.
SIP21107DR-18-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):
- 1.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- -
- 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-18-E3 FAQ
1.How can I place an order for SIP21107DR-18-E3 through Aetrix?
Please submit a Request for Quotation (RFQ) for SIP21107DR-18-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-18-E3 reliable?
The price and inventory of SIP21107DR-18-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-18-E3 is usually 5 days.
3.What payment methods are accepted for SIP21107DR-18-E3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SIP21107DR-18-E3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SIP21107DR-18-E3?
SIP21107DR-18-E3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SIP21107DR-18-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-18-E3?
For technical support, including SIP21107DR-18-E3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SIP21107DR-18-E3 requirements.
6.How does Aetrix verify that SIP21107DR-18-E3 is sourced from the original manufacturer or authorized distributors?
All SIP21107DR-18-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-18-E3 meets industry standards.
7.What is the process for return or replacement of SIP21107DR-18-E3?
All SIP21107DR-18-E3 units undergo pre-shipment inspection (PSI). If there is an issue with SIP21107DR-18-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-18-E3 part is unused and in its original packaging.
Return procedure for SIP21107DR-18-E3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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