My Inquiry
My Account
Monolithic Power Systems Inc. MP8903DJ-2.85-LF-P
- Part No.:
- MP8903DJ-2.85-LF-P
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
MP8903DJ-2.85-LF-P.pdf
- Description:
- IC REG LIN POS ADJ 150MA TSOT23
- Quantity:
- Payment:
- Shipping:
Inventory:1,859
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MP8903DJ-2.85-LF-P from Monolithic Power Systems is a fixed-output 2.85V, 150mA low-dropout linear regulator in TSOT23-5 package, operating from 2.7V to 6.5V input with ±2% output accuracy and 100mV dropout at 100mA. It integrates thermal shutdown protection and supports stable regulation with low-ESR ceramic capacitors. Used for powering mobile handset PLL circuits and audio codec bias rails where compact size and precision voltage stability are critical.
For engineers reviewing the MP8903DJ-2.85-LF-P datasheet, MP8903DJ-2.85-LF-P pinout, MP8903DJ-2.85-LF-P application, or MP8903DJ-2.85-LF-P equivalent, key selection considerations include its 2.85V fixed output, TSOT23-5 thermal resistance (θJA = 220°C/W), EN-controlled startup sequence, FB pin compatibility for adjustable configurations, and 1.222V internal reference for external resistor divider design.
Technical Context
The MP8903DJ-2.85-LF-P employs a PMOS pass transistor architecture enabling low dropout operation down to 100mV at 100mA load, with internal bandgap reference (1.222V) and feedback amplifier driving the FB pin. Its enable logic accepts TTL-compatible EN input (VIH ≥ 1.5V, VIL ≤ 0.4V) and draws only 0.1–1μA in shutdown mode.
Thermal protection activates at TJ = 155°C with 30°C hysteresis, and stability is ensured with 1–10μF X5R/X7R output capacitors. PSRR reaches 50dB at 1kHz and 20dB at 1MHz under standard 2.2μF output capacitance, supporting noise-sensitive analog subsystems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.85V ±2% - ensures precise biasing for RF PLL VCOs and audio DAC reference rails. |
| Max Output Current | 150mA - sufficient for low-power analog signal chains and sensor interface ICs. |
| Dropout Voltage | 100mV at 100mA - enables operation with minimal headroom, e.g., 3.0V input powering 2.85V rail. |
| Input Voltage Range | 2.7V to 6.5V - compatible with single-cell Li-ion (3.0–4.2V), USB 5V, and 3.3V system rails. |
| Quiescent Current | Typical 105μA - minimizes standby power loss in battery-powered portable devices. |
| PSRR @ 1kHz | 50dB - suppresses switching noise from adjacent DC/DC converters feeding shared input rails. |
| Thermal Shutdown | 155°C activation with 30°C hysteresis - prevents permanent damage during sustained overload or poor PCB heatsinking. |
Pinout & Package
MP8903DJ-2.85-LF-P uses the TSOT23-5 surface-mount package (2.9mm × 1.6mm × 1.0mm), optimized for space-constrained portable designs and featuring an exposed pad for enhanced thermal dissipation (θJA = 220°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - IN | Power input supply | Primary input source (2.7–6.5V); requires ≥1μF X5R/X7R ceramic bypass capacitor to GND. |
| 2 - GND | Ground reference | System ground return path; must connect directly to low-impedance ground plane for stability and thermal performance. |
| 3 - EN | Enable control input | TTL-compatible digital enable (VIH ≥ 1.5V); tie to IN for automatic startup or drive low for <1μA shutdown current. |
| 4 - FB | Feedback reference node | Internal 1.222V reference point; used with external resistor divider to configure adjustable outputs (1.25–5V). |
| 5 - OUT | Regulated output | 2.85V regulated output; requires ≥1μF X5R/X7R ceramic capacitor to GND for loop stability and transient response. |
Key Features
| Feature | Design Value |
|---|---|
| Low dropout operation | 100mV at 100mA load enables use with tight input–output margins, extending battery runtime in portable systems. |
| Stable with low-ESR ceramics | Supports 1–10μF X5R/X7R capacitors without requiring high-ESR tantalum or aluminum electrolytics, reducing BOM cost and footprint. |
| Integrated thermal protection | 155°C junction shutdown with 30°C hysteresis provides autonomous overtemperature recovery without external circuitry. |
| Adjustable output capability | FB pin allows reconfiguration to 1.25–5V via external resistor divider (R1+R2 ≤ 100kΩ), increasing design reuse across voltage variants. |
| High PSRR at audio frequencies | 50dB rejection at 1kHz suppresses ripple from switching regulators, preserving SNR in audio codec and ADC reference supplies. |
Applications
| Mobile Handset PLL Power | Audio Codec Bias Supply |
|---|---|
|
Use Scenario: Providing clean, low-noise 2.85V bias to voltage-controlled oscillators (VCOs) in cellular transceivers. IC Role / Device Role / Timing Role: Low-dropout linear regulator supplying stable reference voltage to PLL core circuitry. Use Value: 100mV dropout and 50dB PSRR at 1kHz minimize phase noise degradation caused by input rail ripple. |
Use Scenario: Delivering regulated 2.85V to analog front-end (AFE) sections of stereo audio codecs in smartphones. IC Role / Device Role / Timing Role: Precision voltage source for DAC/ADC reference and op-amp bias rails. Use Value: ±2% output accuracy and low quiescent current ensure consistent dynamic range and extended battery life. |
| IoT Sensor Node Core Logic | Wearable Health Monitor Analog Front-End |
|
Use Scenario: Powering ultra-low-power microcontrollers and BLE radio subsystems in compact IoT edge nodes. IC Role / Device Role / Timing Role: Primary LDO for 2.85V logic and RF interface domains. Use Value: TSOT23-5 footprint and 105μA quiescent current support miniaturized, energy-harvesting–compatible designs. |
Use Scenario: Supplying analog signal conditioning circuitry (ECG amplifiers, optical sensor drivers) in wrist-worn health monitors. IC Role / Device Role / Timing Role: Low-noise, thermally robust regulator for sensitive biopotential measurement paths. Use Value: Thermal shutdown (155°C) and stable operation down to –40°C ensure reliability in variable environmental conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-dropout linear regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-285I/TT | 250mA max output, higher 200mV dropout at 100mA, no EN pin, SOT23-3 package | Lacks enable control and thermal shutdown; suitable only for always-on, non-critical loads | Select when EN functionality and thermal protection are not required and higher output current margin is needed. |
| Torex XC6206P282MR-G | 150mA max output, 180mV dropout at 100mA, no EN pin, SOT23-5 package, ±2% accuracy | No enable function; fixed 2.82V output (0.03V lower than MP8903DJ-2.85-LF-P) | Choose when board space matches SOT23-5 but EN control and exact 2.85V are not mandatory. |
Compared with MCP1700T-285I/TT and XC6206P282MR-G, MP8903DJ-2.85-LF-P uniquely combines EN control, thermal shutdown, and 100mV dropout in TSOT23-5-critical for battery-operated systems requiring programmable power sequencing and robust fault handling.
Availability
MP8903DJ-2.85-LF-P is available at Aetrix Electronics and suitable for mobile handset PLL power, audio codec bias supply, and wearable health monitor analog front-end applications requiring stable component supply across production lifecycles.
Supply support for MP8903DJ-2.85-LF-P 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
Monolithic Power Systems (MPS) is a fabless semiconductor company specializing in high-performance analog and mixed-signal ICs for power management, motion control, and automotive applications.
The MP8903 belongs to MPS's low-quiescent-current LDO product line, designed specifically for space- and power-constrained portable electronics requiring precision voltage regulation with integrated protection features.
FAQ
What is the minimum input voltage required for MP8903DJ-2.85-LF-P to maintain regulation?
The MP8903DJ-2.85-LF-P requires a minimum input voltage of 2.7V to operate within specification. With its 100mV dropout at 100mA, it maintains 2.85V output regulation down to VIN = 2.95V under that load. Below 2.7V, the device may cease regulation or enter undervoltage lockout.
Can MP8903DJ-2.85-LF-P be used in adjustable-output configuration?
Yes-the FB pin allows conversion to adjustable mode using an external resistor divider. The internal reference is 1.222V, so VOUT = 1.222V × (1 + R1/R2). R1 + R2 must not exceed 100kΩ, and R2 is recommended at 10kΩ ±1% for accuracy.
Does MP8903DJ-2.85-LF-P require an input capacitor?
Yes-a ceramic capacitor of 1–10μF (X5R or X7R dielectric) is required between IN and GND. This stabilizes input impedance, improves line transient response, and prevents oscillation due to source inductance.
What is the thermal resistance (θJA) of the TSOT23-5 package?
The TSOT23-5 package has a junction-to-ambient thermal resistance (θJA) of 220°C/W on a standard 4-layer JEDEC test board. Actual performance depends on PCB copper area, airflow, and proximity to heat sources.
Is MP8903DJ-2.85-LF-P RoHS compliant and lead-free?
Yes-MP8903DJ-2.85-LF-P is RoHS compliant and lead-free, as indicated by the "LF" suffix in the part number. All MPS products adhere to RoHS Directive 2011/65/EU and are green-status qualified.
How does the EN pin behave during power-up?
The EN pin is active-high with VIH ≥ 1.5V. When left floating, internal pull-down ensures default disable state. For automatic startup, connect EN directly to IN; this guarantees turn-on once VIN exceeds 2.7V and avoids brown-out glitches.
What is the maximum allowable output capacitance?
No upper limit is specified-the MP8903DJ-2.85-LF-P is stable with 1–10μF ceramic output capacitors. Larger values improve load transient response but increase start-up time and physical footprint; X5R/X7R dielectrics are strongly recommended.
MP8903DJ-2.85-LF-P Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- SOT-23-5 Thin, TSOT-23-5
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Not For New Designs
- Output Configuration:
- Positive
- Output Type:
- Adjustable (Fixed)
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 6.5V
- Voltage - Output (Min/Fixed):
- 1.25V (2.85V)
- Voltage - Output (Max):
- 5V
- Voltage Dropout (Max):
- 0.125V @ 150mA, -
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- -
- Current - Supply (Max):
- -
- PSRR:
- 50dB ~ 20dB (1kHz ~ 1MHz)
- Control Features:
- Enable
- Protection Features:
- Over Temperature
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-5
MP8903DJ-2.85-LF-P FAQ
1.How can I place an order for MP8903DJ-2.85-LF-P through Aetrix?
Please submit a Request for Quotation (RFQ) for MP8903DJ-2.85-LF-P 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 MP8903DJ-2.85-LF-P reliable?
The price and inventory of MP8903DJ-2.85-LF-P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP8903DJ-2.85-LF-P is usually 5 days.
3.What payment methods are accepted for MP8903DJ-2.85-LF-P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP8903DJ-2.85-LF-P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP8903DJ-2.85-LF-P?
MP8903DJ-2.85-LF-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP8903DJ-2.85-LF-P 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 MP8903DJ-2.85-LF-P?
For technical support, including MP8903DJ-2.85-LF-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP8903DJ-2.85-LF-P requirements.
6.How does Aetrix verify that MP8903DJ-2.85-LF-P is sourced from the original manufacturer or authorized distributors?
All MP8903DJ-2.85-LF-P 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 MP8903DJ-2.85-LF-P meets industry standards.
7.What is the process for return or replacement of MP8903DJ-2.85-LF-P?
All MP8903DJ-2.85-LF-P units undergo pre-shipment inspection (PSI). If there is an issue with MP8903DJ-2.85-LF-P, 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 MP8903DJ-2.85-LF-P part is unused and in its original packaging.
Return procedure for MP8903DJ-2.85-LF-P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MP8903DJ-2.85-LF-P Tags
-
MIC5504-1.8YM5-TR
Microchip Technology
-
MIC5504-3.3YM5-TR
Microchip Technology
-
MIC5365-3.0YC5-TR
Microchip Technology
-
MIC5365-1.8YC5-TR
Microchip Technology
-
MIC5365-2.5YC5-TR
Microchip Technology
-
MIC5365-3.3YC5-TR
Microchip Technology
-
MIC5365-3.3YD5-TR
Microchip Technology
-
MIC5317-3.3YM5-TR
Microchip Technology
-
TLV1117LV33DCYR
Texas Instruments
-
MIC5317-3.3YMT-TZ
Microchip Technology
-
MIC5528-3.3YMT-TR
Microchip Technology
-
TLV75801PDRVR
Texas Instruments
Tech Hub
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
