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Vishay Siliconix SI9183DT-25-T1-E3
- Part No.:
- SI9183DT-25-T1-E3
- Manufacturer:
- Vishay Siliconix
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
SI9183DT-25-T1-E3.pdf
- Description:
- IC REG LIN 2.5V 150MA TSOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,270
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Product details
Overview
SI9183DT-25-T1-E3 from Vishay Siliconix is a fixed-output 2.5 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 300 mA peak output, uses ceramic output capacitors down to 1 µF, and features built-in short-circuit and thermal protection. It is designed for battery-powered portable systems requiring stable, low-noise, low-quiescent-power regulation.
For engineers reviewing the SI9183DT-25-T1-E3 datasheet, SI9183DT-25-T1-E3 pinout, SI9183DT-25-T1-E3 application, or SI9183DT-25-T1-E3 equivalent, this page provides verified technical context, exact pin functions, real-world use cases in portable electronics, and validated alternative options with documented functional differences.
Technical Context
The SI9183DT-25-T1-E3 implements a CMOS-based LDO architecture with a 1.215 V internal reference and error amplifier driving a PMOS pass transistor. Its bandwidth exceeds 50 kHz, enabling fast line and load transient response-measured at ≤10 mV dynamic line regulation and ≤30 mV dynamic load regulation under 1–150 mA step changes.
It integrates a shutdown control circuit with 0.4 V turn-off threshold and 1.2 V turn-on threshold, 6 MΩ internal pull-down on SD, and supports noise reduction via external 0.1 µF capacitor on BP pin. Thermal shutdown activates at 165 °C with 20 °C hysteresis, and short-circuit current is limited to 400 mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.5 V ±2.5% over −40 °C to +85 °C - ensures stable core logic supply for 2.5 V I/O domains. |
| Dropout Voltage | 135 mV typical at 150 mA - enables operation down to VIN = 2.635 V while maintaining regulation. |
| Max Output Current | 150 mA guaranteed continuous, 300 mA peak for 2 ms - supports burst-mode digital loads like RF transceivers. |
| Ground Current | 500 µA typical at 150 mA - minimizes quiescent power loss in battery standby mode. |
| Shutdown Current | 0.1–1 µA max - reduces system-level leakage during deep sleep states. |
| Noise (w/ CBP) | 100 µVRMS (50 Hz–100 kHz) with 0.1 µF BP cap - meets low-noise analog supply requirements for ADCs or RF ICs. |
| Ripple Rejection | 60 dB at 1 kHz, 40 dB at 10 kHz - suppresses switching noise from upstream DC/DC converters. |
Pinout & Package
SI9183DT-25-T1-E3 is housed in a lead (Pb)-free Thin SOT-23-5 package (1.6 mm × 2.9 mm × 1.1 mm), optimized for space-constrained portable PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VIN | Input supply connection | Accepts 2–6 V input; 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/shutdown control | Drives regulator ON when ≥1.2 V; OFF when ≤0.4 V; includes 6 MΩ internal pull-down. |
| 4 - BP | Noise bypass terminal | Connects external 0.1 µF X5R/X7R ceramic cap to GND to reduce output noise by ~200 µVRMS. |
| 5 - VOUT | Regulated output | Delivers fixed 2.5 V; stable with 1–10 µF ceramic output capacitors (X5R/X7R recommended). |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low dropout | 135 mV at 150 mA extends usable battery voltage range - e.g., enables full 2.5 V output from single Li-ion cell down to ~2.6 V. |
| Ceramic capacitor compatibility | Stable with 1–10 µF X5R/X7R ceramics - eliminates need for costly tantalum or aluminum electrolytics and reduces board area. |
| Fast transient response | ≤30 mV load transient deviation (1→150 mA, 2 µs edge) - maintains clean supply during CPU wake-up or radio transmit bursts. |
| Integrated protection | Thermal shutdown (165 °C) + short-circuit limiting (400 mA) - prevents damage during fault conditions without external circuitry. |
| Low-noise option | BP pin supports 0.1 µF bypass cap to cut output noise to 100 µVRMS - suitable for precision analog or RF subsystems. |
Applications
| Cellular Phone Baseband | PDA Core Logic Supply |
|---|---|
Use Scenario: Powering ARM9/ARM11 application processor core and memory interface in 3G handsets. IC Role / Device Role / Timing Role: Primary 2.5 V LDO delivering regulated supply to processor I/O banks and DDR controller. Use Value: 135 mV dropout allows sustained operation until battery drops to 2.635 V, extending talk time by ~8% vs. higher-dropout alternatives. |
Use Scenario: Supplying 2.5 V to ASIC and touchscreen controller in handheld PDAs with intermittent high-current bursts. IC Role / Device Role / Timing Role: Low-noise, fast-response post-regulator following a buck converter in multi-rail power tree. Use Value: 50 kHz bandwidth and ≤30 mV load transient deviation prevent display flicker or touch latency during UI rendering. |
| Notebook Subsystem Rail | Wireless Module Bias |
Use Scenario: Generating clean 2.5 V for WLAN/BT combo module in ultraportable notebooks. IC Role / Device Role / Timing Role: Noise-sensitive analog supply rail decoupled from noisy main system rails via BP-capacitor filtering. Use Value: 100 µVRMS noise (with 0.1 µF BP cap) meets spectral purity requirements for 2.4 GHz RF front-end biasing. |
Use Scenario: Providing stable 2.5 V to low-power Zigbee or BLE SoC in battery-operated IoT sensors. IC Role / Device Role / Timing Role: Always-on LDO with shutdown control, enabling microamp-level sleep current during sensor idle periods. Use Value: 0.1 µA shutdown current extends 2×AA battery life to >5 years in periodic wake-up applications. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-2502E/TT | 250 mA rated, 170 mV dropout at 250 mA, no BP pin, 6 µA quiescent current | Lacks noise-bypass capability; higher IQ limits ultra-low-power use | Choose for higher current headroom where noise is non-critical and PCB space permits larger SOT-23-3 footprint |
| Torex XC6206P252MR-G | 150 mA rated, 200 mV dropout at 150 mA, no shutdown pin, 1 µA IQ | No enable control; fixed 2.5 V only; lower IQ but no SD functionality | Choose for always-on, space-constrained applications where shutdown is unnecessary and dropout margin >150 mV is acceptable |
Compared with SI9183DT-25-T1-E3, MCP1700T-2502E/TT offers higher peak current but sacrifices noise performance and shutdown control, while XC6206P252MR-G provides lower quiescent current but eliminates system-level power sequencing capability - making SI9183DT-25-T1-E3 optimal for noise-sensitive, battery-powered designs requiring active enable management.
Availability
SI9183DT-25-T1-E3 is available at Aetrix Electronics and suitable for cellular phones, PDAs, notebook subsystems, and wireless modules requiring stable component supply across industrial temperature ranges and long production lifecycles.
Supply support for SI9183DT-25-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 components and analog ICs, with leadership in power management, signal conditioning, and passive integration technologies.
The Si9183 family was designed specifically for battery-powered portable electronics demanding ultra-low dropout, fast transient response, and ceramic capacitor compatibility - targeting extended runtime and compact form factors.
FAQ
What is the maximum input voltage rating for the SI9183DT-25-T1-E3?
The SI9183DT-25-T1-E3 has an absolute maximum input voltage of 6.5 V, with recommended operating range from 2 V to 6 V. Exceeding 6.5 V risks permanent damage per Vishay's Absolute Maximum Ratings table. For reliable operation, maintain VIN ≤ 6 V in all conditions, especially during load dump or hot-swap events.
Does the SI9183DT-25-T1-E3 require an external feedback resistor network?
No, the SI9183DT-25-T1-E3 is a fixed-output version delivering 2.5 V and does not use the FB pin. Its internal reference and regulation circuitry are factory-trimmed for 2.5 V ±2.5%. The BP pin is used instead for noise reduction - connect a 0.1 µF ceramic capacitor between BP and GND for optimal low-noise performance.
How does the shutdown function behave on the SI9183DT-25-T1-E3?
The SI9183DT-25-T1-E3 features an active-high shutdown pin (SD). When SD voltage is ≥1.2 V, the regulator operates normally; when ≤0.4 V, it enters shutdown mode drawing ≤1 µA. A 6 MΩ internal pull-down ensures default OFF state if SD is left floating. Tie SD to VIN for automatic turn-on at power-up.
Can the SI9183DT-25-T1-E3 drive a 10 µF ceramic output capacitor?
Yes, the SI9183DT-25-T1-E3 is stable with output capacitance from 1 µF to 10 µF, including X5R and X7R ceramic types. Using 10 µF improves load transient response and reduces output ripple, though 2.2 µF is the typical value specified in Vishay's test conditions for datasheet parameters.
What thermal protection behavior does the SI9183DT-25-T1-E3 exhibit?
The SI9183DT-25-T1-E3 activates thermal shutdown at 165 °C junction temperature and remains latched off until junction cools by ≥20 °C (hysteresis). During overload or high ambient conditions, this protects the device from permanent damage and allows safe recovery without external intervention.
SI9183DT-25-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):
- 2.5V
- 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-25-T1-E3 FAQ
1.How can I place an order for SI9183DT-25-T1-E3 through Aetrix?
Please submit a Request for Quotation (RFQ) for SI9183DT-25-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-25-T1-E3 reliable?
The price and inventory of SI9183DT-25-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-25-T1-E3 is usually 5 days.
3.What payment methods are accepted for SI9183DT-25-T1-E3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI9183DT-25-T1-E3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI9183DT-25-T1-E3?
SI9183DT-25-T1-E3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI9183DT-25-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-25-T1-E3?
For technical support, including SI9183DT-25-T1-E3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI9183DT-25-T1-E3 requirements.
6.How does Aetrix verify that SI9183DT-25-T1-E3 is sourced from the original manufacturer or authorized distributors?
All SI9183DT-25-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-25-T1-E3 meets industry standards.
7.What is the process for return or replacement of SI9183DT-25-T1-E3?
All SI9183DT-25-T1-E3 units undergo pre-shipment inspection (PSI). If there is an issue with SI9183DT-25-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-25-T1-E3 part is unused and in its original packaging.
Return procedure for SI9183DT-25-T1-E3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI9183DT-25-T1-E3 Tags
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