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Vishay Siliconix SI9183DT-285-T1-E3
- Part No.:
- SI9183DT-285-T1-E3
- Manufacturer:
- Vishay Siliconix
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
SI9183DT-285-T1-E3.pdf
- Description:
- IC REG LIN 2.85V 150MA TSOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,485
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Product details
Overview
SI9183DT-285-T1-E3 from Vishay Siliconix is a fixed-output 2.85 V, 150-mA CMOS low-dropout (LDO) voltage regulator in Thin SOT-23-5 package. It delivers 135 mV dropout at 150 mA, supports 2 V to 6 V input range, features 1.5% output accuracy over −40 °C to +85 °C, and includes integrated short-circuit and thermal protection. It powers core logic rails in portable battery-operated devices requiring stable, low-noise, fast-transient regulation.
For engineers reviewing the SI9183DT-285-T1-E3 datasheet, SI9183DT-285-T1-E3 pinout, SI9183DT-285-T1-E3 application, or SI9183DT-285-T1-E3 equivalent, key selection criteria include guaranteed 150-mA continuous output, 100 µA typical shutdown current, 300-mA peak current capability, ceramic capacitor compatibility (1 µF–10 µF), and fixed 2.85 V output with no external feedback components required.
Technical Context
The SI9183DT-285-T1-E3 implements a CMOS-based LDO architecture with internal 1.215 V reference and error amplifier, enabling ultra-low ground current (150 µA no-load, 500 µA at 150 mA) and fast transient response (<30 mV load step deviation). Its internal bandgap reference and precision trimming ensure ±1.5% output accuracy across temperature and load.
It uses a dedicated BP pin for noise bypassing (0.1 µF ceramic to GND reduces output noise to 100 µVrms), and integrates a 6 MΩ internal pull-down on SD for reliable shutdown control. The device maintains stability with ceramic output capacitors as low as 1 µF and operates up to 125 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.85 V ±2.5% over full temperature/load range - eliminates external resistor divider and simplifies layout. |
| Dropout Voltage | 135 mV at 150 mA load - enables operation down to 3.0 V input when powering 2.85 V rail, maximizing battery utilization. |
| Output Current | Guaranteed 150 mA continuous, 300 mA peak - supports burst-mode digital loads without dropout. |
| Ground Current | 500 µA at 150 mA load - minimizes quiescent power loss in always-on subsystems. |
| Shutdown Current | 1 µA maximum - ensures negligible battery drain during system sleep states. |
| Noise Performance | 100 µVrms (50 Hz–100 kHz) with 0.1 µF CBP capacitor - meets low-noise analog/RF supply requirements. |
| Input Range | 2 V to 6 V - compatible with single Li-ion, dual alkaline, or post-regulated DC/DC outputs. |
Pinout & Package
SI9183DT-285-T1-E3 is housed in a RoHS-compliant, lead-free Thin SOT-23-5 package (1.6 mm × 2.9 mm × 1.1 mm), optimized for space-constrained portable designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Input supply connection | Accepts 2–6 V; requires ≥1 µF ceramic bypass to GND for stability and EMI suppression. |
| GND (Pin 2) | Power and signal reference | Common return for VIN, VOUT, SD, and BP; must be low-impedance local ground plane. |
| SD (Pin 3) | Enable/disable control input | Logic-high (≥1.2 V) enables regulation; logic-low (≤0.4 V) disables output and reduces IIN(off) to ≤1 µA. |
| BP (Pin 4) | Noise bypass terminal | Connects to 0.1 µF X5R/X7R ceramic capacitor to GND to reduce output noise by ~67% vs. no CBP. |
| VOUT (Pin 5) | Regulated output | Delivers stable 2.85 V; supports 1–10 µF ceramic output capacitors with ESR 0.4–4 Ω. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low dropout | 135 mV @ 150 mA enables >95% battery energy extraction before cutoff in 2.85 V systems. |
| Ceramic capacitor stability | Stable with 1 µF–10 µF X5R/X7R ceramics - eliminates costly tantalum and reduces BOM count. |
| Fast transient response | ≤30 mV load step deviation (1→150 mA, 2 µs edge) - prevents brownout in microcontroller core supplies. |
| Integrated protection | Thermal shutdown (165 °C) and short-circuit current limiting (400 mA) prevent field failures without external circuitry. |
| Low-noise option | BP pin supports 0.1 µF bypass cap to achieve 100 µVrms noise - suitable for ADC reference or RF bias rails. |
Applications
| Smartphone Application Processor Core Rail | Wearable Sensor Hub Power |
|---|---|
Use Scenario: Powers ARM Cortex-M4 core in compact wearable MCU with intermittent BLE transmission bursts. IC Role / Device Role / Timing Role: Primary 2.85 V LDO supplying processor VDD_IO and internal regulators; responds to 100 mA load transients within 5 µs. Use Value: 135 mV dropout extends usable battery range by 12% vs. legacy bipolar LDOs; 1 µA shutdown current enables multi-week standby. | Use Scenario: Supplies low-noise 2.85 V rail to MEMS accelerometer and ADC in hearable device. IC Role / Device Role / Timing Role: Precision analog supply with BP-bypassed output; rejects switching noise from adjacent DC/DC converter. Use Value: 100 µVrms noise ensures <1 LSB error in 12-bit sensor digitization; ceramic capacitor compatibility reduces board area by 40%. |
| Medical Pulse Oximeter Front-End | Industrial Handheld Scanner Logic Rail |
Use Scenario: Provides clean 2.85 V bias to photodiode TIA and analog front-end in battery-powered oximeter. IC Role / Device Role / Timing Role: Low-noise, thermally robust LDO operating continuously at 85 °C ambient inside sealed enclosure. Use Value: Guaranteed ±2.5% output accuracy over −40 °C to +85 °C ensures consistent LED drive current; thermal hysteresis prevents cycling at trip point. | Use Scenario: Regulates 2.85 V for FPGA configuration memory and interface logic in ruggedized barcode scanner. IC Role / Device Role / Timing Role: High-reliability post-regulator after 5 V buck converter; withstands 400 mA short-circuit events during connector hot-plug. Use Value: Integrated 400 mA short-circuit limit and 150 °C max junction temperature eliminate need for external fuses or thermal sensors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-285I/TT | 300 mA rated, 170 mV dropout at 250 mA, 2.5 µA quiescent current - higher IQ, lower dropout margin at full load. | Targets higher-current IoT nodes; lacks BP pin for noise optimization. | Select when peak current >150 mA is required and noise <100 µVrms is not critical. |
| Torex XC6206P285MR-G | 150 mA rated, 250 mV dropout at 150 mA, no shutdown pin - simpler control but no power-gating capability. | Suitable for cost-sensitive consumer wearables where always-on operation is acceptable. | Choose when shutdown functionality is unnecessary and PCB space is extremely constrained (SOT-23-3). |
Compared with MCP1700T-285I/TT and XC6206P285MR-G, the SI9183DT-285-T1-E3 uniquely combines 135 mV dropout, 1 µA shutdown, and BP-enabled low-noise operation in a single 5-pin SOT-23 - making it optimal for battery life, noise sensitivity, and dynamic power management in portable medical and wireless edge devices.
Availability
SI9183DT-285-T1-E3 is available at Aetrix Electronics and suitable for battery-powered portable systems, cellular handsets, and industrial handheld scanners requiring stable component supply, long-term lifecycle support, and lead-free compliance.
Supply support for SI9183DT-285-T1-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 MOSFETs, diodes, optoelectronics, and precision analog ICs, with emphasis on high-reliability, high-efficiency power solutions.
The Si9183 family was designed specifically for battery-powered portable electronics demanding ultra-low quiescent current, minimal dropout, and fast transient response - targeting smartphones, wearables, and medical sensors where runtime and signal integrity are critical.
FAQ
What is the guaranteed output voltage tolerance of the SI9183DT-285-T1-E3 over temperature and load?
The SI9183DT-285-T1-E3 guarantees ±2.5% output voltage accuracy across the full operating temperature range of −40 °C to +85 °C and load current range of 1 mA to 150 mA. This specification accounts for initial tolerance, line regulation, load regulation, and thermal drift - ensuring predictable 2.85 V rail performance in real-world portable environments without calibration.
Does the SI9183DT-285-T1-E3 require an external feedback resistor network?
No, the SI9183DT-285-T1-E3 is a fixed-output variant and does not require external feedback resistors. Its 2.85 V regulation is achieved via internal trimming of the 1.215 V reference and error amplifier gain. Pin 4 is designated BP (bypass) - not FB - confirming its fixed-output Version A configuration per Vishay's ordering table and pin description.
What is the minimum recommended output capacitor value and type for stable operation of the SI9183DT-285-T1-E3?
The SI9183DT-285-T1-E3 is stable with ceramic output capacitors ranging from 1 µF to 10 µF. X5R or X7R dielectric types are explicitly recommended for optimal noise and transient performance. A 2.2 µF X5R ceramic capacitor is used in all typical application circuits and characterization data, providing best-in-class trade-off between size, ESR (0.4–4 Ω), and temperature stability.
How does the BP pin on the SI9183DT-285-T1-E3 reduce output noise, and what capacitor value is recommended?
The BP pin on the SI9183DT-285-T1-E3 connects to an internal noise-reduction circuit that filters reference amplifier noise. Adding a 0.1 µF X5R or X7R ceramic capacitor from BP to GND reduces broadband output noise from 300 µVrms (no CBP) to 100 µVrms (50 Hz–100 kHz), a 67% improvement critical for analog/RF supply rails. Smaller values (e.g., 0.01 µF) provide partial reduction but 0.1 µF delivers full spec performance.
What thermal protection features are built into the SI9183DT-285-T1-E3, and how do they behave?
The SI9183DT-285-T1-E3 incorporates thermal shutdown that activates at 165 °C junction temperature and includes 20 °C hysteresis. When triggered, regulation ceases and VOUT drops; recovery occurs only after junction temperature falls below 145 °C. This protects against sustained overload or poor heatsinking in confined enclosures - a key reliability feature validated across Vishay's qualification testing per Document 71258.
SI9183DT-285-T1-E3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay Siliconix
- Series:
- -
- Package/Case:
- SOT-23-5 Thin, TSOT-23-5
- 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):
- 900 µA
- Current - Supply (Max):
- -
- PSRR:
- 60dB ~ 30dB (1kHz ~ 100kHz)
- Control Features:
- Enable
- Protection Features:
- Over Temperature, Short Circuit
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-5
SI9183DT-285-T1-E3 FAQ
1.How can I place an order for SI9183DT-285-T1-E3 through Aetrix?
Please submit a Request for Quotation (RFQ) for SI9183DT-285-T1-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 SI9183DT-285-T1-E3 reliable?
The price and inventory of SI9183DT-285-T1-E3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI9183DT-285-T1-E3 is usually 5 days.
3.What payment methods are accepted for SI9183DT-285-T1-E3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI9183DT-285-T1-E3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI9183DT-285-T1-E3?
SI9183DT-285-T1-E3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI9183DT-285-T1-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 SI9183DT-285-T1-E3?
For technical support, including SI9183DT-285-T1-E3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI9183DT-285-T1-E3 requirements.
6.How does Aetrix verify that SI9183DT-285-T1-E3 is sourced from the original manufacturer or authorized distributors?
All SI9183DT-285-T1-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 SI9183DT-285-T1-E3 meets industry standards.
7.What is the process for return or replacement of SI9183DT-285-T1-E3?
All SI9183DT-285-T1-E3 units undergo pre-shipment inspection (PSI). If there is an issue with SI9183DT-285-T1-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 SI9183DT-285-T1-E3 part is unused and in its original packaging.
Return procedure for SI9183DT-285-T1-E3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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