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Vishay Siliconix SI9185DMP-AD-T1-E3
- Part No.:
- SI9185DMP-AD-T1-E3
- Manufacturer:
- Vishay Siliconix
- Package:
- PowerPAK® MLP33-8
- Datasheet:
-
SI9185DMP-AD-T1-E3.pdf
- Description:
- IC REG LIN POS ADJ 500MA MLP33-8
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SI9185DMP-AD-T1-E3 from Vishay Siliconix is an adjustable-output 500 mA CMOS low-dropout (LDO) voltage regulator with integrated error flag and power-on-reset functionality. It operates from 2 V to 6 V input, delivers ≤150 mV dropout at 500 mA (for VOUT ≥ 5 V), supports 1.215 V–5.0 V output via external resistor divider, and features 100 µVRMS output noise with CNOISE capacitor. It is used in battery-powered portable electronics requiring stable, low-noise, low-quiescent-power regulation.
For engineers reviewing the SI9185DMP-AD-T1-E3 datasheet, SI9185DMP-AD-T1-E3 pinout, SI9185DMP-AD-T1-E3 application, or SI9185DMP-AD-T1-E3 equivalent, key selection criteria include adjustable output range (1.215–5.0 V), guaranteed 500 mA load capability, thermal shutdown at 165 °C, 1 µA max shutdown current, and MLP33 PowerPAK package compatibility with high-current PCB layout requirements.
Technical Context
The SI9185DMP-AD-T1-E3 implements a CMOS-based LDO architecture with a precision 1.215 V internal reference and feedback-controlled pass transistor. Its fast transient response (>50 kHz bandwidth) enables stable operation under dynamic load steps up to 500 mA with <30 mV load regulation deviation.
It integrates dual monitoring functions: an open-drain ERROR pin asserting low when VOUT drops below 95 % of nominal, and a DELAY pin enabling programmable POR timing via external capacitor. The SENSE/ADJ pin accepts a resistor divider (R2 = 25–150 kΩ) to set output voltage, with ADJ pin current ≤100 nA ensuring minimal divider loading.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | Guaranteed 500 mA continuous - supports high-current microcontroller cores and RF modules without derating. |
| Input Voltage Range | 2 V to 6 V - compatible with single-cell Li-ion (2.7–4.2 V), dual-cell alkaline (2–3.2 V), and 5 V rail systems. |
| Dropout Voltage | 150 mV typical at 500 mA for VOUT ≥ 5 V - maximizes usable battery capacity down to ~2.15 V under full load. |
| Output Noise | 100 µVRMS (50 Hz–100 kHz) with 0.1 µF CNOISE - meets low-noise analog supply requirements for ADCs and RF ICs. |
| Shutdown Current | ≤1 µA maximum - preserves battery life during system sleep modes in portable devices. |
| Thermal Shutdown | 165 °C junction temperature threshold with 20 °C hysteresis - prevents permanent damage during sustained overload or poor heatsinking. |
| Line Regulation | ±0.18 %/V - maintains tight output stability across wide input variations common in battery discharge profiles. |
Pinout & Package
The SI9185DMP-AD-T1-E3 uses the thermally enhanced MLP33 PowerPAK package (3.3 mm × 3.3 mm × 0.8 mm), featuring an exposed pad soldered to PCB ground for low θJC (4 °C/W) and 1.1 W power dissipation capability at TA = 25 °C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CNOISE (1) | Noise bypass terminal | Connects to 0.01–0.1 µF ceramic capacitor to reduce output noise by 50 %; critical for analog/RF supply rails. |
| DELAY (2) | POR timing control | Sinks 1.2–3.0 µA to charge external capacitor; sets ERROR pin assertion delay for synchronized system reset. |
| GND (3) | Power and signal reference | Common return for VIN, VOUT, CNOISE, DELAY, SENSE/ADJ, and SD; must connect to exposed pad. |
| VIN (4) | Main input supply | Accepts 2–6 V; requires ≥2.2 µF ceramic bypass capacitor close to pin to ensure stability and transient response. |
| VOUT (5) | Regulated output | Delivers adjustable 1.215–5.0 V; supports 1–10 µF X5R/X7R ceramic output capacitors for optimal noise and transient performance. |
| SENSE/ADJ (6) | Feedback input | For adjustable version: connects to resistor divider (R1/R2); ADJ voltage fixed at 1.215 V ±2.5 %, IADJ ≤100 nA. |
| ERROR (7) | Open-drain fault indicator | Asserts low when VOUT < 95 % nominal; doubles as POR signal when DELAY capacitor is present; requires external pull-up. |
| SD (8) | Enable/disable control | Logic-high (≥1.5 V) enables regulation; logic-low (≤0.4 V) disables output and reduces supply current to ≤1 µA. |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable output range | 1.215 V to 5.0 V via external resistor divider - enables single BOM for multiple voltage rails across product variants. |
| Ultra-low noise performance | 100 µVRMS with CNOISE capacitor - eliminates need for post-LDO filtering in sensitive analog circuits. |
| Fast transient response | <30 mV load step deviation (1 mA → 150 mA, 2 µs edge) - maintains processor core voltage during burst-mode operation. |
| Integrated power-on-reset | Programmable delay via DELAY pin capacitor - provides deterministic system initialization timing without external supervisor IC. |
| Thermally robust packaging | MLP33 PowerPAK with exposed thermal pad - achieves θJA = 50 °C/W on 4-layer board, supporting >1 W dissipation at 80 °C ambient. |
Applications
| Smartphone Baseband Power | Digital Still Camera Core Supply |
|---|---|
Use Scenario: Powers application processor core and memory interface in compact smartphone designs with single-cell Li-ion battery. IC Role / Device Role / Timing Role: Adjustable LDO delivering 1.2 V @ 500 mA with <150 mV dropout ensures full utilization of battery voltage down to 2.15 V. Use Value: Extends usable battery runtime by 8–12 % compared to higher-dropout regulators while meeting tight noise specs for high-speed DDR interfaces. | Use Scenario: Supplies image sensor digital core and ISP logic in DSLR or mirrorless camera bodies. IC Role / Device Role / Timing Role: Provides clean, low-noise 1.8 V rail with programmable POR delay to synchronize sensor initialization with lens actuator calibration. Use Value: Eliminates external reset supervisor IC and reduces BOM count by one component while improving system startup reliability. |
| Industrial Handheld Terminal | Wearable Health Monitor |
Use Scenario: Regulates 3.3 V logic rail for ARM Cortex-M MCU and wireless transceiver in ruggedized handheld terminals. IC Role / Device Role / Timing Role: Delivers 500 mA with fast line transient response (<10 mV deviation) to maintain stable operation during RF transmission bursts. Use Value: Prevents MCU brown-out resets during 2.4 GHz BLE transmission events, improving data link reliability in noisy EMI environments. | Use Scenario: Powers ultra-low-power ECG/PPG analog front-end and Bluetooth LE SoC in battery-operated wearable patches. IC Role / Device Role / Timing Role: Provides 1.2 V adjustable output with 1 µA shutdown current and thermal shutdown at 165 °C for safe skin-contact operation. Use Value: Enables >7-day continuous operation on coin-cell battery while maintaining medical-grade signal integrity through sub-100 µVRMS noise floor. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar adjustable-output LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Torex XC6219B122MR-G | Fixed 1.2 V output only; 300 mA rated; 250 mV dropout at 300 mA; no ERROR/DELAY pins. | Lacks programmable POR and fault flag; limited to fixed-voltage use cases. | Select when only 1.2 V is needed and system-level reset generation is handled externally. |
| Richtek RT9013-12GB | Fixed 1.2 V output; 500 mA rated; 250 mV dropout at 500 mA; includes enable but no error flag or noise bypass pin. | No output voltage adjustability or low-noise enhancement capability. | Choose for cost-sensitive applications where adjustable output and noise performance are not required. |
Compared with XC6219B122MR-G and RT9013-12GB, the SI9185DMP-AD-T1-E3 uniquely combines adjustable output (1.215–5.0 V), integrated POR/error signaling, and 100 µVRMS noise performance - making it the only option among the three suitable for multi-rail, noise-sensitive, and system-reset-critical portable designs.
Availability
SI9185DMP-AD-T1-E3 is available at Aetrix Electronics and suitable for smartphone baseband power, digital still camera core supply, industrial handheld terminal logic rails, and wearable health monitor analog front-ends requiring stable component supply across production lifecycles.
Supply support for SI9185DMP-AD-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, sensing, and passive technologies.
The Si9185 family was designed specifically for battery-powered portable electronics demanding micropower operation, ultra-low dropout, and integrated system supervision - targeting laptops, smartphones, PDAs, and digital cameras.
FAQ
What output voltage range does the SI9185DMP-AD-T1-E3 support?
The SI9185DMP-AD-T1-E3 supports an adjustable output voltage range of 1.215 V to 5.0 V, set via an external resistor divider connected to the SENSE/ADJ pin. The internal reference voltage is 1.215 V ±2.5 %, and R2 must be between 25 kΩ and 150 kΩ for optimal noise immunity and power efficiency. This range is confirmed in the "RECOMMENDED OPERATING RANGE" table of Vishay Document 71765.
How does the ERROR pin function on the SI9185DMP-AD-T1-E3?
The ERROR pin on the SI9185DMP-AD-T1-E3 is an open-drain output that asserts low when VOUT falls below 95 % of its nominal value. It also serves as a power-on-reset (POR) signal when a capacitor is connected between the DELAY pin and GND. An external pull-up resistor is required, and the pin's low-state voltage is guaranteed ≤0.4 V at 2 mA sink current per the "SPECIFICATIONS" section of the datasheet.
What is the maximum dropout voltage of the SI9185DMP-AD-T1-E3 at 500 mA load?
The maximum dropout voltage of the SI9185DMP-AD-T1-E3 at 500 mA load is 300 mV for VOUT ≥ 5 V (tested at room temperature), and up to 825 mV for VOUT < 2 V. These values are specified in the "SPECIFICATIONS" table under "Dropout Voltage" with test conditions clearly defined for each output voltage range and temperature condition.
Can the SI9185DMP-AD-T1-E3 operate with ceramic output capacitors?
Yes, the SI9185DMP-AD-T1-E3 is explicitly designed to be stable with 1 µF to 10 µF ceramic output capacitors, including X5R and X7R dielectrics. The datasheet confirms this in the "RECOMMENDED OPERATING RANGE" and "TYPICAL APPLICATIONS CIRCUITS", noting that ceramic caps deliver superior noise and transient performance versus tantalum alternatives.
What thermal protection features does the SI9185DMP-AD-T1-E3 include?
The SI9185DMP-AD-T1-E3 includes thermal shutdown at 165 °C junction temperature with 20 °C hysteresis, and built-in short-circuit protection. These features are documented in the "FEATURES" list and "SPECIFICATIONS" table, where thermal shutdown junction temperature (tJ(s/d)) is guaranteed at 165 °C across -40 °C to 85 °C ambient, preventing irreversible damage during overload or poor PCB thermal design.
SI9185DMP-AD-T1-E3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay Siliconix
- Series:
- -
- Package/Case:
- PowerPAK® MLP33-8
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Adjustable
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 1.215V
- Voltage - Output (Max):
- 5V
- Voltage Dropout (Max):
- 0.3V @ 500mA
- Current - Output:
- 500mA
- Current - Quiescent (Iq):
- 1.5 mA
- Current - Supply (Max):
- 4 mA
- PSRR:
- 60dB ~ 40dB (1kHz ~ 100kHz)
- Control Features:
- Enable, Power On Reset
- Protection Features:
- Over Temperature, Short Circuit
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- PowerPAK® MLP33-8
SI9185DMP-AD-T1-E3 FAQ
1.How can I place an order for SI9185DMP-AD-T1-E3 through Aetrix?
Please submit a Request for Quotation (RFQ) for SI9185DMP-AD-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 SI9185DMP-AD-T1-E3 reliable?
The price and inventory of SI9185DMP-AD-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 SI9185DMP-AD-T1-E3 is usually 5 days.
3.What payment methods are accepted for SI9185DMP-AD-T1-E3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI9185DMP-AD-T1-E3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI9185DMP-AD-T1-E3?
SI9185DMP-AD-T1-E3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI9185DMP-AD-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 SI9185DMP-AD-T1-E3?
For technical support, including SI9185DMP-AD-T1-E3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI9185DMP-AD-T1-E3 requirements.
6.How does Aetrix verify that SI9185DMP-AD-T1-E3 is sourced from the original manufacturer or authorized distributors?
All SI9185DMP-AD-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 SI9185DMP-AD-T1-E3 meets industry standards.
7.What is the process for return or replacement of SI9185DMP-AD-T1-E3?
All SI9185DMP-AD-T1-E3 units undergo pre-shipment inspection (PSI). If there is an issue with SI9185DMP-AD-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 SI9185DMP-AD-T1-E3 part is unused and in its original packaging.
Return procedure for SI9185DMP-AD-T1-E3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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