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Vishay Siliconix SIP21107DR-33-E3
- Part No.:
- SIP21107DR-33-E3
- Manufacturer:
- Vishay Siliconix
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
SIP21107DR-33-E3.pdf
- Description:
- IC REG LINEAR 3.3V 150MA SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,059
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Product details
Overview
SIP21107DR-33-E3 from Vishay Siliconix is a 3.3 V fixed-output, 150 mA low-dropout linear regulator with Power-OK (POK) error flag output, 135 mV dropout at full load, 1.0 % output voltage accuracy at 25 °C, and operation across -40 °C to +85 °C ambient. It delivers stable power to noise-sensitive RF sections in portable wireless handsets and digital cameras.
For engineers reviewing the SIP21107DR-33-E3 datasheet, SIP21107DR-33-E3 pinout, SIP21107DR-33-E3 application, or SIP21107DR-33-E3 equivalent, key selection criteria include POK functionality, ultra-low ground current (35 µA typ. at 1 mA), auto-discharge capability (100 Ω internal NMOS), thermal/short-circuit protection, and compatibility with 1 µF ceramic output capacitors.
Technical Context
The SIP21107DR-33-E3 uses a P-channel MOSFET pass transistor (0.9 Ω typical RDS(on)) and a 1.2 V bandgap reference to achieve precise regulation. Its error amplifier compares feedback voltage against the reference and drives the gate of the PMOS to maintain output stability under varying load and input conditions.
It integrates an open-drain POK comparator monitoring VOUT against 90–96 % of nominal output voltage, with 1.5 % hysteresis and 40 µs delay. Shutdown mode reduces supply current to ≤1 µA at 85 °C and activates a 100 Ω NMOS discharge path from VOUT to GND.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3 V ±2.5 % over full temperature range (-40 °C to +85 °C) |
| Dropout Voltage | 135 mV at 150 mA load - enables operation with VIN as low as 3.435 V while maintaining regulation |
| Ground Current | 35 µA typical at 1 mA load - extends battery life in standby and light-load portable applications |
| Shutdown Current | ≤1 µA maximum at 85 °C - minimizes battery drain during system sleep modes |
| POK Threshold | 90–96 % of VOUT with 1.5 % hysteresis - provides reliable power-good signaling for microcontroller reset sequencing |
| Auto-Discharge Resistance | 100 Ω typical - discharges 1 µF output capacitor to <100 mV in <1 ms upon shutdown |
| Thermal Protection | 160 °C junction shutdown with 20 °C hysteresis - prevents damage during sustained overload or poor PCB thermal design |
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 | Circuit Role | Design Meaning |
|---|---|---|
| 1 (EN) | Enable input | Active-high logic control; device enabled when voltage ≥1.2 V, disabled when ≤0.4 V; must not float |
| 2 (GND) | Ground reference | Electrical return and primary thermal path; requires direct connection to large PCB ground plane for thermal management |
| 3 (VIN) | Input supply | Accepts 2.2–6.0 V input; requires 1 µF ceramic bypass capacitor to GND for stability and line transient suppression |
| 4 (VOUT) | Regulated output | Delivers 3.3 V ±2.5 %; supports 150 mA continuous, 330 mA peak; stable with ≥1 µF ceramic output capacitor |
| 5 (POK) | Power-OK open-drain flag | Active-high indicator requiring external pull-up to VIN or VOUT; sinks ≤0.5 mA; asserts low on dropout, overcurrent, or thermal fault |
Key Features
| Feature | Design Value |
|---|---|
| Integrated POK output | Eliminates need for external supervisor IC in battery-powered systems requiring power sequencing or fault detection |
| No external noise bypass capacitor required | Differentiates SIP21107 from SIP21106; simplifies BOM and layout while retaining low-noise performance (350 µVrms) |
| Auto-discharge function | Internally discharges VOUT via 100 Ω NMOS on EN deassertion - avoids floating rail issues and enables fast system wake-up |
| Thermal and short-circuit protection | Enables robust operation in uncontrolled environments; limits junction temperature to 160 °C and output current to 330 mA typical |
| Ultra-low quiescent current | 35 µA typical at 1 mA load - critical for always-on subsystems in cellular handsets and pagers |
Applications
| Cellular Handsets | Wireless Modems |
|---|---|
Use Scenario: Powering RF transceiver ICs and baseband processors in dual-mode GSM/UMTS handsets with tight battery voltage margins. IC Role / Device Role / Timing Role: Primary LDO supplying clean 3.3 V bias to sensitive analog front-end circuitry. Use Value: 135 mV dropout preserves operating time as battery discharges from 4.2 V to 3.4 V; POK ensures safe processor boot after power stabilization. | Use Scenario: Regulating power to LTE/Wi-Fi coexistence modules where EMI immunity and fast transient response are essential. IC Role / Device Role / Timing Role: Low-noise, fast-startup LDO delivering regulated 3.3 V to RF synthesizers and ADC/DAC blocks. Use Value: 350 µVrms output noise (10 Hz–100 kHz) meets spectral purity requirements; 70 µs turn-on time supports rapid link establishment. |
| Digital Cameras | PDAs |
Use Scenario: Supplying image sensor interface and ISP core logic in compact point-and-shoot cameras with intermittent high-current bursts. IC Role / Device Role / Timing Role: Main system LDO providing stable 3.3 V to CMOS sensor I/O and flash memory controllers. Use Value: 330 mA peak current capability handles autofocus motor surge without dropout; auto-discharge clears residual charge before next capture cycle. | Use Scenario: Powering touch controller, backlight driver, and low-power MCU in legacy PDA platforms with aging Li-ion cells. IC Role / Device Role / Timing Role: Secondary LDO generating 3.3 V from main 3.6 V battery rail for peripheral subsystems. Use Value: 1.0 % initial accuracy and ±2.5 % full-range tolerance ensure reliable touchscreen calibration and display contrast control across temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-3302E/TT | 3.3 V fixed, 250 mA, 600 mV dropout at 250 mA, no POK output, 1.8 µA quiescent current | Lacks POK flag and auto-discharge; better suited for ultra-low-IQ always-on sensors than power-sequenced RF systems | Select if lowest possible shutdown current is critical and POK is handled externally |
| TLS850F3BVT/V33 | 3.3 V fixed, 500 mA, integrated watchdog and reset generator, 120 µA quiescent current, AEC-Q100 qualified | Automotive-grade with extended temp range (-40 °C to +150 °C); adds system-level supervision beyond basic regulation | Select for automotive infotainment or telematics where functional safety and extended temperature are mandatory |
Compared with MCP1700T-3302E/TT and TLS850F3BVT/V33, the SIP21107DR-33-E3 uniquely balances POK integration, 135 mV dropout, and 35 µA ground current in a 2.1 mm² SC70 package-making it optimal for space-constrained, battery-operated consumer RF applications requiring deterministic power-good signaling.
Availability
SIP21107DR-33-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-33-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 for demanding analog and power management applications.
The SiP21107 series was developed specifically for portable electronics requiring low-noise, low-quiescent-current LDOs with integrated power-good monitoring and fast transient response in ultra-compact packages.
FAQ
What is the minimum input voltage required for SIP21107DR-33-E3 to maintain regulation at 150 mA load?
The SIP21107DR-33-E3 requires a minimum input voltage of 3.435 V to maintain regulation at 150 mA load, calculated from its 135 mV dropout voltage added to the 3.3 V nominal output. Below this threshold, the device enters dropout and output voltage declines linearly with input.
Does SIP21107DR-33-E3 require an external capacitor on the POK pin?
No, the SIP21107DR-33-E3 does not require an external capacitor on the POK pin. The POK output is an open-drain NMOS that requires only an external pull-up resistor to VIN or VOUT; no timing or filtering capacitor is needed for proper operation.
How does the auto-discharge function operate in SIP21107DR-33-E3 during shutdown?
When the EN pin is driven low, the SIP21107DR-33-E3 activates an internal 100 Ω NMOS transistor between VOUT and GND. This path discharges a 1 µF output capacitor to less than 100 mV within 1 ms, preventing floating rails and enabling predictable system reset behavior.
What is the guaranteed POK threshold range for SIP21107DR-33-E3 at 3.3 V output?
The SIP21107DR-33-E3 guarantees a POK threshold of 90–96 % of nominal VOUT (i.e., 2.97–3.168 V) across the full operating temperature range, with 1.5 % hysteresis to prevent chatter during marginal voltage conditions.
Can SIP21107DR-33-E3 be used with ceramic output capacitors smaller than 1 µF?
No - the SIP21107DR-33-E3 is designed for stable operation with a minimum 1 µF ceramic output capacitor (6 nF/mA rule yields ~1 µF at 150 mA). Using smaller values may cause instability, excessive ringing, or failure to regulate under dynamic load conditions.
SIP21107DR-33-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):
- 3.3V
- 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-33-E3 FAQ
1.How can I place an order for SIP21107DR-33-E3 through Aetrix?
Please submit a Request for Quotation (RFQ) for SIP21107DR-33-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-33-E3 reliable?
The price and inventory of SIP21107DR-33-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-33-E3 is usually 5 days.
3.What payment methods are accepted for SIP21107DR-33-E3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SIP21107DR-33-E3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SIP21107DR-33-E3?
SIP21107DR-33-E3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SIP21107DR-33-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-33-E3?
For technical support, including SIP21107DR-33-E3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SIP21107DR-33-E3 requirements.
6.How does Aetrix verify that SIP21107DR-33-E3 is sourced from the original manufacturer or authorized distributors?
All SIP21107DR-33-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-33-E3 meets industry standards.
7.What is the process for return or replacement of SIP21107DR-33-E3?
All SIP21107DR-33-E3 units undergo pre-shipment inspection (PSI). If there is an issue with SIP21107DR-33-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-33-E3 part is unused and in its original packaging.
Return procedure for SIP21107DR-33-E3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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