My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX8840ELTXY+T
- Part No.:
- MAX8840ELTXY+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 6-WFDFN
- Datasheet:
-
MAX8840ELTXY+T.pdf
- Description:
- IC REG LIN POS ADJ 150MA 6UDFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,461
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX8840ELTXY+T from Maxim Integrated is an ultra-low-noise, high-PSRR, low-dropout linear regulator delivering up to 150mA output current with 120mV dropout at 120mA load, 11µVRMS output noise (100Hz–100kHz), and 78dB PSRR at 1kHz. It operates from 2V to 6V input and supports preset output voltages from 1.5V to 4.5V in 100mV increments, targeting noise-sensitive analog and RF power rails in portable electronics.
For engineers reviewing the MAX8840ELTXY+T datasheet, MAX8840ELTXY+T pinout, MAX8840ELTXY+T application, or MAX8840ELTXY+T equivalent, key selection criteria include its µDFN-6 package footprint, BP-pin noise-bypass capability, guaranteed 150mA output with <40µA ground current, and stability with only 1µF ceramic output capacitance.
Technical Context
The MAX8840ELTXY+T employs a p-channel MOSFET pass transistor (typ. 1Ω RDS(ON)) enabling low dropout and minimal quiescent current-40µA at light load and 220µA in dropout-without base-drive losses typical of PNP-based LDOs. Its bandgap reference (1.225V) feeds an error amplifier that controls the pass gate via internal feedback.
Noise reduction is achieved through a dedicated BP pin connected to a 10nF capacitor between BP and OUT, which shunts high-frequency noise from the bandgap core. Shutdown mode reduces supply current to <1µA by disabling the reference, error amp, and gate drive, placing OUT in high-impedance state.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | Guaranteed 150mA continuous output supports demanding analog/RF loads without thermal derating under typical PCB layout. |
| Dropout Voltage | 120mV at 120mA load enables operation down to VIN = VOUT + 0.12V-critical for extending battery life in single-cell Li-ion systems. |
| Output Noise | 11µVRMS (100Hz–100kHz) minimizes phase jitter in clock-sourced ADCs and RF synthesizers. |
| PSRR | 78dB at 1kHz and 54dB at 100kHz suppresses switching noise from adjacent DC-DC converters feeding mixed-signal subsystems. |
| Ground Current | 40µA quiescent ground current ensures >10-year battery runtime in always-on sensor nodes with 10µA sleep current budgets. |
| Stability | Stable with 1µF ceramic output capacitor across full load range-eliminates need for costly tantalum or large MLCC arrays. |
| Input Range | 2V to 6V input supports direct connection to Li-ion (2.7–4.2V), Li-poly, or regulated 3.3V/5V rails without external pre-regulation. |
Pinout & Package
MAX8840ELTXY+T is housed in a 1.5mm × 1.0mm × 0.8mm 6-pin µDFN package with exposed thermal pad (pin 5 is N.C., pin 4 is BP). The package is RoHS-compliant and lead-free ("+T" suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - IN | Unregulated input supply | Accepts 2V–6V; requires 1µF ceramic bypass to GND for line-transient suppression and EMI filtering. |
| 2 - GND | Power and thermal ground | Dual-function pin: provides electrical return path and conducts heat to PCB ground plane-must be soldered to large copper area. |
| 3 - SHDN | Active-low shutdown control | Pull ≤0.4V to disable regulator; draws <0.01µA bias current-enables ultra-low-power system-level sequencing. |
| 4 - BP | Noise bypass terminal | Connects to OUT via 10nF capacitor to reduce output voltage noise by >90% versus BP-open configuration. |
| 5 - N.C. | No internal connection | Not bonded; must remain unconnected-no routing or thermal relief required on PCB. |
| 6 - OUT | Regulated output voltage | Delivers precise preset voltage (e.g., 2.85V); requires 1µF ceramic capacitor to GND for stability and load-transient response. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low output noise | 11µVRMS (100Hz–100kHz) enables clean power for high-resolution SAR ADCs and low-phase-noise VCOs. |
| High PSRR at audio frequencies | 78dB rejection at 1kHz prevents audible noise coupling into audio DACs and headphone amplifiers. |
| Low dropout with p-MOSFET | 120mV dropout at 120mA eliminates need for higher-input-voltage rails-reducing BOM count and board space. |
| Minimal external components | Only IN and OUT 1µF ceramics required-no compensation network needed-accelerates layout and validation. |
| Robust protection | Integrated overcurrent limit (150–300mA) and thermal shutdown (160°C trip, 10°C hysteresis) prevent damage during fault conditions. |
Applications
| Cellular Transceiver Power | Portable Audio Codec Supply |
|---|---|
Use Scenario: Powering RF transceiver LNA and mixer stages in GSM/UMTS handsets where supply ripple directly impacts EVM and ACLR. IC Role / Device Role / Timing Role: Low-noise post-regulator for noisy switched-mode power supply outputs, providing clean 2.85V rail referenced to MAX8840ELTXY+T's BP-bypassed architecture. Use Value: 11µVRMS noise and 54dB PSRR at 100kHz suppress switching artifacts from PMIC DC-DC converters, improving receiver sensitivity by ≥2dB. | Use Scenario: Supplying stereo audio DAC and headphone amplifier in Bluetooth earbuds requiring zero audible hiss at 0dB gain. IC Role / Device Role / Timing Role: Dedicated low-noise LDO for analog signal chain, decoupled from digital core supply using MAX8840ELTXY+T's 78dB PSRR at 1kHz. Use Value: Ultra-low 11µVRMS output noise eliminates measurable THD+N floor degradation-meets <0.001% spec at 1kHz full-scale output. |
| Digital Camera Image Sensor Bias | WLAN Baseband Processor Core |
Use Scenario: Providing stable 3.3V bias to CMOS image sensor analog front-end where supply-induced fixed-pattern noise corrupts image quality. IC Role / Device Role / Timing Role: Precision LDO with ±1% output accuracy and <0.003%/mA load regulation, ensuring consistent pixel response across exposure modes. Use Value: 120mV dropout allows operation from partially discharged 3.6V Li-ion cells while maintaining 3.3V output-extending usable capture time by 18%. | Use Scenario: Powering WLAN baseband processor's 1.8V I/O and 1.2V core rails in portable hotspot devices subject to bursty 802.11ac traffic. IC Role / Device Role / Timing Role: Fast transient-response LDO (load-step recovery <1ms) with 1µF ceramic stability, placed adjacent to processor power pins. Use Value: Excellent load transient performance (±10mV deviation for 0→50mA step) prevents logic errors during MAC-layer arbitration bursts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Torex XC6219B282MR-G | 280mV dropout at 100mA; 25µVRMS noise; no BP pin; SOT-25 package (2.9mm × 2.8mm) | Larger footprint; higher noise limits use in RF/analog chains; lacks BP-driven noise optimization | Select when cost sensitivity outweighs noise/size requirements and board space permits larger SOT-25. |
| Analog Devices ADP125ARHZ-2.85-R7 | 200mV dropout at 150mA; 40µVRMS noise; 5-pin TSOT-23; no BP pin; 30µA quiescent current | Higher noise degrades SNR in precision ADCs; smaller package but no noise-bypass capability | Choose for general-purpose 2.85V rail where PSRR >40dB above 10kHz is sufficient and BP-level noise control is unnecessary. |
Compared with XC6219B282MR-G and ADP125ARHZ-2.85-R7, the MAX8840ELTXY+T delivers superior noise performance (11µVRMS vs. ≥25µV) and smallest footprint (1.5mm × 1.0mm), making it optimal for space-constrained, noise-critical RF and high-fidelity audio subsystems.
Availability
MAX8840ELTXY+T is available at Aetrix Electronics and suitable for cellular transceivers, portable audio codecs, digital camera image sensors, and WLAN baseband processors requiring stable component supply with guaranteed long-term availability.
Supply support for MAX8840ELTXY+T 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
Maxim Integrated is a U.S.-based semiconductor company specializing in analog and mixed-signal ICs for power management, interface, sensing, and RF applications.
The MAX8840 series belongs to Maxim's ultra-low-noise LDO product line, engineered specifically for noise-sensitive portable electronics-including cellular radios, audio subsystems, and imaging sensors-where PSRR, output noise, and miniaturization are critical.
FAQ
What output voltage options are available for MAX8840ELTXY+T?
The MAX8840ELTXY+T is factory-preset to specific output voltages between 1.5V and 4.5V in 100mV increments (e.g., 2.85V = MAX8840ELT29+T). The "XY" in the part number encodes the voltage-refer to Maxim's Output Voltage Selector Guide. It does not support adjustable output; for that, use MAX8842ELT+T instead.
How does the BP pin on MAX8840ELTXY+T reduce output noise?
The BP pin on MAX8840ELTXY+T connects internally to the bandgap reference node. Adding a 10nF capacitor between BP and OUT shunts high-frequency noise from the reference, reducing total output noise to 11µVRMS. Without this capacitor, noise rises to ~230µVRMS. The capacitor must be placed close to the MAX8840ELTXY+T with short traces for effectiveness.
Can MAX8840ELTXY+T operate with only 1µF output capacitance?
Yes-MAX8840ELTXY+T is designed to be stable with a minimum 1µF ceramic output capacitor across the full 0–150mA load range and all operating temperatures when using X7R/X5R dielectrics. Larger values improve transient response and PSRR, but 1µF is sufficient for most portable applications.
What is the shutdown current of MAX8840ELTXY+T?
The shutdown supply current of MAX8840ELTXY+T is less than 1µA at +25°C and ≤0.05µA at +85°C when SHDN is pulled low. This ultra-low leakage enables multi-year battery life in always-on IoT sensors and real-time clock backup supplies.
Does MAX8840ELTXY+T include thermal protection?
Yes-MAX8840ELTXY+T incorporates thermal-overload protection that disables the pass transistor when junction temperature exceeds +160°C. After cooling by 10°C, it automatically resumes regulation. This protects against sustained overload or poor PCB thermal design without requiring external circuitry.
MAX8840ELTXY+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 6-WFDFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Adjustable
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 1.225V
- Voltage - Output (Max):
- 4.5V
- Voltage Dropout (Max):
- -
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- 90 µA
- Current - Supply (Max):
- -
- PSRR:
- 78dB ~ 54dB (1kHz ~ 100kHz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-µDFN (1.5x1)
MAX8840ELTXY+T FAQ
1.How can I place an order for MAX8840ELTXY+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8840ELTXY+T 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 MAX8840ELTXY+T reliable?
The price and inventory of MAX8840ELTXY+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8840ELTXY+T is usually 5 days.
3.What payment methods are accepted for MAX8840ELTXY+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8840ELTXY+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8840ELTXY+T?
MAX8840ELTXY+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8840ELTXY+T 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 MAX8840ELTXY+T?
For technical support, including MAX8840ELTXY+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8840ELTXY+T requirements.
6.How does Aetrix verify that MAX8840ELTXY+T is sourced from the original manufacturer or authorized distributors?
All MAX8840ELTXY+T 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 MAX8840ELTXY+T meets industry standards.
7.What is the process for return or replacement of MAX8840ELTXY+T?
All MAX8840ELTXY+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX8840ELTXY+T, 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 MAX8840ELTXY+T part is unused and in its original packaging.
Return procedure for MAX8840ELTXY+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX8840ELTXY+T 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
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.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
