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Vishay Siliconix SI9183DT-28-T1-E3
- Part No.:
- SI9183DT-28-T1-E3
- Manufacturer:
- Vishay Siliconix
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
SI9183DT-28-T1-E3.pdf
- Description:
- IC REG LIN 2.8V 150MA TSOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,615
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Product details
Overview
SI9183DT-28-T1-E3 from Vishay Siliconix is a fixed-output 2.8 V, 150-mA CMOS low-dropout (LDO) voltage regulator in a Thin SOT-23-5 package. It delivers 135 mV dropout at 150 mA, supports 2 V to 6 V input, operates from −40 °C to +85 °C, and features built-in short-circuit and thermal protection. It powers core logic rails in portable battery-powered systems where extended runtime and low-noise regulation are critical.
For engineers reviewing the SI9183DT-28-T1-E3 datasheet, SI9183DT-28-T1-E3 pinout, SI9183DT-28-T1-E3 application, or SI9183DT-28-T1-E3 equivalent, this page provides verified technical context, exact pin functions, real-world use cases, and validated alternative options for portable power management design.
Technical Context
The SI9183DT-28-T1-E3 implements a CMOS-based LDO architecture with a 1.215 V internal reference and error amplifier driving a PMOS pass transistor. Its 50 kHz bandwidth enables fast line/load transient response-measured at ≤10 mV dynamic line regulation and ≤30 mV dynamic load regulation-while maintaining ultra-low ground current (500 µA typical at 150 mA).
It integrates a dedicated shutdown control path with 0.4 V turn-off threshold and 1.2 V turn-on threshold, plus internal 6 MΩ pull-down on SD. The BP pin supports external 0.1 µF ceramic bypass capacitor to reduce output noise to 100 µVrms (50 Hz–100 kHz), distinguishing it from adjustable variants that use FB instead of BP.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.8 V ±2.5% over −40 °C to +85 °C - ensures stable core supply for 2.8 V I/O or analog subsystems. |
| Dropout Voltage | 135 mV at 150 mA - enables full battery utilization down to ~2.93 V input before regulation loss. |
| Max Output Current | 150 mA continuous, 300 mA peak - supports burst-mode digital loads like Bluetooth baseband or sensor interfaces. |
| Ground Current | 500 µA typical at 150 mA - minimizes quiescent drain during active operation, extending standby time. |
| Output Noise | 100 µVrms (50 Hz–100 kHz) with 0.1 µF CBP - meets low-noise requirements for RF front-end biasing or ADC reference supplies. |
| Shutdown Current | ≤1 µA - reduces system-level leakage when host MCU disables power rail. |
| Input Range | 2 V to 6 V - compatible with single Li-ion (2.7–4.2 V), dual alkaline (2–3 V), or 5 V USB-supplied systems. |
Pinout & Package
Package: Thin SOT-23-5 (lead-free, RoHS-compliant), 2.9 mm × 1.6 mm × 1.1 mm body height, thermal resistance θJA = 180 °C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VIN | Input supply connection | Accepts 2–6 V; requires ≥1 µF ceramic bypass to GND for stability and EMI suppression. |
| 2 - GND | Power ground reference | Common return for VIN, VOUT, SD, and BP; must be low-impedance local ground plane. |
| 3 - SD | Active-high enable control | Logic high ≥1.2 V enables regulation; ≤0.4 V disables output and reduces IIN(off) to ≤1 µA. |
| 4 - BP | Noise bypass terminal | Connects 0.1 µF X5R/X7R ceramic to GND to filter internal reference noise and lower output ripple. |
| 5 - VOUT | Regulated output | Delivers 2.8 V ±2.5%; requires 1–10 µF ceramic output capacitor (X5R/X7R) for stability and transient response. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low dropout | 135 mV @ 150 mA enables >95% battery energy extraction in single-cell Li-ion systems. |
| Low-noise regulation | 100 µVrms output noise with BP capacitor supports sensitive analog/RF circuitry without external filtering. |
| Fast transient response | ≤30 mV load step deviation (1→150 mA, 2 µs edge) maintains voltage integrity during processor wake-up bursts. |
| Thermal & short-circuit protection | Auto-shutdown at 165 °C junction temp with 20 °C hysteresis prevents permanent damage under overload. |
| CMOS architecture | PMOS pass device eliminates base-drive current, enabling <1 µA shutdown and predictable light-load efficiency. |
Applications
| Cellular Handset Baseband | Wearable Sensor Hub |
|---|---|
Use Scenario: Powers 2.8 V interface logic and low-power microcontroller in GSM/UMTS handset mainboard. IC Role / Device Role / Timing Role: Primary LDO for baseband SoC I/O domain, providing clean, regulated 2.8 V with fast load response to RF transmit bursts. Use Value: 135 mV dropout extends usable battery range by ~120 mV per discharge cycle; 100 µVrms noise prevents digital switching coupling into RF receive path. | Use Scenario: Supplies 2.8 V to MEMS accelerometer, BLE radio, and MCU in compact fitness tracker. IC Role / Device Role / Timing Role: Standby-optimized LDO delivering regulated rail during motion-sensing intervals and BLE advertising cycles. Use Value: 500 µA ground current at 150 mA load and ≤1 µA shutdown current maximize battery life between sync events. |
| Industrial Handheld Terminal | Medical Point-of-Care Monitor |
Use Scenario: Provides 2.8 V supply to barcode scanner ASIC and touch controller in ruggedized PDA. IC Role / Device Role / Timing Role: Post-regulator after buck converter, rejecting switching noise while supporting 150 mA peak scan pulses. Use Value: 60 dB PSRR at 1 kHz suppresses buck converter ripple; thermal shutdown protects against enclosure overheating in sealed enclosures. | Use Scenario: Powers 2.8 V analog front-end (AFE) and display driver in portable ECG monitor. IC Role / Device Role / Timing Role: Low-noise, precision LDO ensuring stable AFE bias and accurate signal acquisition. Use Value: BP-pin bypass reduces output noise to 100 µVrms, meeting clinical-grade SNR requirements for sub-mV biopotential signals. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-2802E/TT | 250 mV dropout at 250 mA; 1.6 µA quiescent current; SOT-23-5 package; no BP pin. | Lacks BP noise-bypass capability; higher dropout limits usable battery range in deep-discharge scenarios. | Choose for ultra-low IQ designs where noise is secondary and peak current exceeds 150 mA. |
| Torex XC6206P282MR-G | 200 mV dropout at 150 mA; 1 µA shutdown current; SOT-23-5; no BP pin; 1% output accuracy. | No noise-reduction pin; tighter output tolerance but slower transient response (40 mV load step deviation). | Prefer when ±1% output accuracy is mandatory and system-level filtering handles noise. |
Compared with SI9183DT-28-T1-E3, MCP1700T-2802E/TT trades lower quiescent current for higher dropout and no noise bypass, while XC6206P282MR-G offers tighter accuracy but sacrifices transient performance and low-noise capability-making SI9183DT-28-T1-E3 optimal for battery-constrained, noise-sensitive portable systems.
Availability
SI9183DT-28-T1-E3 is available at Aetrix Electronics and suitable for cellular handsets, wearable sensors, industrial handheld terminals, medical point-of-care monitors, and battery-powered post-regulation requiring stable component supply across automotive-grade temperature ranges.
Supply support for SI9183DT-28-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 designs and manufactures high-performance discrete semiconductors and passive components, with leadership in MOSFETs, diodes, optoelectronics, and precision analog ICs.
The Si9183 family was engineered specifically for portable battery-powered electronics, emphasizing ultra-low dropout, fast transient response, and minimal quiescent current to maximize runtime and signal integrity.
FAQ
What is the guaranteed output voltage tolerance for SI9183DT-28-T1-E3 over temperature?
The SI9183DT-28-T1-E3 guarantees ±2.5% output voltage accuracy across the full operating temperature range of −40 °C to +85 °C, as specified in the datasheet's "Output Voltage Accuracy (Fixed Versions)" parameter table. This tolerance applies under all load conditions from 1 mA to 150 mA and ensures reliable 2.8 V regulation for downstream logic and analog circuits without requiring external trimming.
Does SI9183DT-28-T1-E3 require an external capacitor on the BP pin for basic operation?
No, SI9183DT-28-T1-E3 operates fully functional without a capacitor on the BP pin. The BP pin is optional and used only to reduce output noise: connecting a 0.1 µF ceramic capacitor from BP to GND lowers RMS noise from 300 µV to 100 µV (50 Hz–100 kHz). For non-noise-critical applications like general-purpose logic rails, BP may be left unconnected or tied to GND.
What is the maximum input voltage the SI9183DT-28-T1-E3 can withstand continuously?
The SI9183DT-28-T1-E3 has an absolute maximum input voltage rating of 6.5 V, but its recommended operating input voltage range is 2 V to 6 V. Continuous operation above 6 V risks permanent damage. For long-term reliability in 5 V systems, VIN should remain ≤6 V; transient spikes beyond 6.5 V-even briefly-must be clamped externally using TVS diodes or RC filters.
How does the shutdown function behave on SI9183DT-28-T1-E3, and what is the SD pin's internal configuration?
The SD pin on SI9183DT-28-T1-E3 is an active-high enable with a built-in 6 MΩ pull-down resistor to GND. Regulation activates when SD ≥1.2 V and disables when SD ≤0.4 V. During shutdown, total input current drops to ≤1 µA. If unused, SD must be tied to VIN to ensure default ON operation-floating SD is not permitted due to noise susceptibility and undefined state.
Can SI9183DT-28-T1-E3 drive a 10 µF ceramic output capacitor, and what is the minimum recommended value?
Yes, SI9183DT-28-T1-E3 is stable with output capacitors ranging from 1 µF to 10 µF, including X5R and X7R ceramic types. The minimum recommended value is 1 µF; using less risks instability and excessive output overshoot during load transients. Larger values (e.g., 4.7–10 µF) improve load-step response and reduce output impedance but do not degrade stability-no ESR requirement is imposed, unlike older bipolar LDOs.
SI9183DT-28-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):
- 2.8V
- 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-28-T1-E3 FAQ
1.How can I place an order for SI9183DT-28-T1-E3 through Aetrix?
Please submit a Request for Quotation (RFQ) for SI9183DT-28-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-28-T1-E3 reliable?
The price and inventory of SI9183DT-28-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-28-T1-E3 is usually 5 days.
3.What payment methods are accepted for SI9183DT-28-T1-E3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI9183DT-28-T1-E3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI9183DT-28-T1-E3?
SI9183DT-28-T1-E3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI9183DT-28-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-28-T1-E3?
For technical support, including SI9183DT-28-T1-E3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI9183DT-28-T1-E3 requirements.
6.How does Aetrix verify that SI9183DT-28-T1-E3 is sourced from the original manufacturer or authorized distributors?
All SI9183DT-28-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-28-T1-E3 meets industry standards.
7.What is the process for return or replacement of SI9183DT-28-T1-E3?
All SI9183DT-28-T1-E3 units undergo pre-shipment inspection (PSI). If there is an issue with SI9183DT-28-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-28-T1-E3 part is unused and in its original packaging.
Return procedure for SI9183DT-28-T1-E3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI9183DT-28-T1-E3 Tags
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