My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX8840ELT45+T
- Part No.:
- MAX8840ELT45+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 6-WFDFN
- Datasheet:
-
MAX8840ELT45+T.pdf
- Description:
- IC REG LINEAR 4.5V 150MA 6UDFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,145
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX8840ELT45+T from Maxim Integrated is a preset 4.5V, 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 - designed for powering noise-sensitive RF and analog circuitry in portable battery-powered systems.
For engineers reviewing the MAX8840ELT45+T datasheet, MAX8840ELT45+T pinout, MAX8840ELT45+T application, or MAX8840ELT45+T equivalent, key selection criteria include its 4.5V fixed output, µDFN-6 (1.5mm × 1.0mm) package, BP-pin noise-bypass capability, 40µA ground current, and guaranteed stability with 1µF ceramic output capacitance.
Technical Context
The MAX8840ELT45+T employs a p-channel MOSFET series pass transistor (typ. RDS(ON) = 1Ω) enabling low dropout and minimal ground current across load and temperature. Its bandgap reference (1.225V) feeds an error amplifier that controls the pass gate via internal feedback, achieving ±1% output accuracy over 100µA–80mA load at +25°C.
Noise performance is enhanced by a dedicated BP pin connected to a 10nF capacitor between BP and OUT, which shunts high-frequency noise from the bandgap core. Shutdown logic disables the reference, error amp, and gate driver, reducing supply current to <1µA while placing OUT in high-impedance state.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 4.5V ±3% over full temperature/load range - ensures stable bias for RF power amplifiers and ADC references. |
| Max Output Current | 150mA guaranteed minimum - supports moderate-power RF ICs and mixed-signal SoCs without thermal derating in µDFN. |
| Dropout Voltage | 120mV at 120mA load - enables operation down to VIN = 4.62V, extending usable battery life in single-cell Li-ion systems. |
| Output Noise | 11µVRMS (100Hz–100kHz) with 10nF BP capacitor - meets stringent spectral purity requirements for VCOs and low-phase-noise receivers. |
| PSRR | 78dB at 1kHz, 54dB at 100kHz - suppresses switching noise from DC/DC converters feeding adjacent analog blocks. |
| Ground Current | 40µA typical at light load, 220µA in dropout - minimizes quiescent drain on coin-cell or energy-harvesting sources. |
| Input Voltage Range | 2V to 6V - compatible with Li-ion (2.7–4.2V), Li-poly, and regulated 3.3V/5V rails. |
Pinout & Package
MAX8840ELT45+T is housed in a lead-free, RoHS-compliant 6-pin µDFN package measuring 1.5mm × 1.0mm × 0.8mm, with exposed thermal pad (GND-connected) for enhanced thermal dissipation in space-constrained layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN | Unregulated input supply | Accepts 2V–6V input; requires 1µF ceramic decoupling close to pin for stability and transient response. |
| 2 GND | Power and thermal ground | Primary return path and thermal conduction node; must connect to large PCB copper area or ground plane. |
| 3 SHDN | Active-low shutdown control | Pull ≤0.4V to disable regulator; draws <0.01µA when asserted; connect to IN for always-on operation. |
| 4 BP | Noise bypass terminal | Connect 10nF capacitor to OUT to reduce output voltage noise to 11µVRMS; shorted to OUT during shutdown. |
| 5 N.C. | No internal connection | Not bonded; leave unconnected and unstubbed on PCB to avoid parasitic coupling. |
| 6 OUT | Regulated 4.5V output | Delivers up to 150mA; bypassed with 1µF ceramic capacitor to GND; high-impedance when SHDN is active. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low output noise | 11µVRMS (100Hz–100kHz) with BP capacitor - enables clean power for VCOs, PLLs, and high-resolution ADCs without additional filtering. |
| High PSRR at audio frequencies | 78dB at 1kHz - effectively isolates sensitive analog stages from digital supply ripple and DC/DC switching artifacts. |
| Stable with minimal capacitance | Guaranteed stability using only 1µF ceramic COUT - reduces BOM count and board area vs. regulators requiring ≥4.7µF tantalum. |
| Low-quiescent-current shutdown | <1µA shutdown current - preserves battery charge in sleep modes of Bluetooth headsets and IoT sensors. |
| Thermal and overcurrent protection | 160°C thermal shutdown with 10°C hysteresis and 150–300mA current limit - prevents damage during sustained overload or poor heatsinking. |
Applications
| RF Power Amplifier Bias | Portable Audio Codec Supply |
|---|---|
|
Use Scenario: Providing clean, low-noise bias to 2.4GHz Wi-Fi PA in smartphone front-end modules. IC Role / Device Role / Timing Role: Low-dropout voltage regulator supplying stable 4.5V rail isolated from noisy system DC/DC converters. Use Value: 11µVRMS noise and 78dB PSRR prevent AM-to-PM distortion and EVM degradation in transmit chain. |
Use Scenario: Powering stereo audio DAC and headphone amplifier in Bluetooth earbuds. IC Role / Device Role / Timing Role: Fixed-output LDO delivering quiet 4.5V supply to minimize THD+N in analog output stage. Use Value: 120mV dropout extends playback time near battery end-of-life; 40µA ground current maximizes standby duration. |
| Digital Camera Image Sensor Bias | Medical Wearable Analog Front-End |
|
Use Scenario: Supplying bias voltage to CMOS image sensor's analog pixel array and column ADC. IC Role / Device Role / Timing Role: Ultra-low-noise regulator ensuring minimal fixed-pattern noise and quantization error in raw image data. Use Value: 11µVRMS noise directly translates to >90dB SNR in 12-bit image capture under low-light conditions. |
Use Scenario: Powering ECG/PPG analog signal conditioning circuitry in compact wearable health monitors. IC Role / Device Role / Timing Role: Precision LDO providing interference-free 4.5V rail for op-amps, filters, and instrumentation amplifiers. Use Value: High PSRR at 100kHz rejects switching noise from wireless charging receivers; thermal protection ensures safety-critical reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Torex XC6219B452MR-G | 4.5V fixed, 150mA, 120mV dropout, but 25µVRMS noise and no BP pin - lacks ultra-low-noise architecture. | Suitable for general-purpose digital I/O rails where noise is less critical than cost or footprint. | Select if budget constraints outweigh noise sensitivity; verify stability with 1µF X5R ceramic output cap. |
| Analog Devices ADP160AUJZ-4.5-R7 | 4.5V fixed, 150mA, 190mV dropout at 150mA, 22µVRMS noise, no BP pin, higher ground current (120µA). | Better suited for non-RF analog sections (e.g., microcontroller cores) where PSRR >60dB above 10kHz is not required. | Choose when thermal performance at full load is prioritized over sub-15µV noise; confirm layout compatibility with SOT-23-5. |
Compared with XC6219B452MR-G and ADP160AUJZ-4.5-R7, the MAX8840ELT45+T uniquely delivers 11µVRMS noise via its BP-capacitor architecture - a decisive advantage for RF bias, precision ADCs, and low-phase-noise clock generation where spectral purity is non-negotiable.
Availability
MAX8840ELT45+T is available at Aetrix Electronics and suitable for cellular transceivers, portable medical sensors, Bluetooth audio subsystems, and digital camera modules requiring stable component supply with consistent parametric performance across production lots.
Supply support for MAX8840ELT45+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 (now part of Analog Devices) is a U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and consumer applications.
The MAX8840 family was engineered specifically for ultra-low-noise, high-PSRR power delivery in space-constrained portable electronics - targeting RF front-ends, precision analog signal chains, and battery-sensitive wearables.
FAQ
What is the exact output voltage tolerance of the MAX8840ELT45+T over temperature and load?
The MAX8840ELT45+T guarantees ±3% output voltage accuracy across the full operating range (−40°C to +85°C, 100µA to 80mA load). At +25°C and 1mA load, typical deviation is ±1%. This tight tolerance ensures reliable biasing of 4.5V-rated RF components without margining concerns in production designs.
Can the MAX8840ELT45+T operate stably with a 1µF X5R ceramic capacitor on the output?
Yes - the MAX8840ELT45+T is explicitly characterized and guaranteed stable with a 1µF X5R ceramic capacitor on the output, regardless of load. The datasheet confirms stability across the full 0–150mA range and −40°C to +85°C, eliminating need for larger or more expensive capacitor types.
Does the MAX8840ELT45+T require an external bypass capacitor on the BP pin, and what value is recommended?
Yes - the MAX8840ELT45+T requires a 10nF capacitor between BP and OUT to achieve its specified 11µVRMS output noise. Values below 1nF or above 100nF degrade noise performance; 10nF is optimal for bandwidth and leakage trade-off. The BP pin is internally shorted to OUT during shutdown.
What is the maximum allowable input voltage for the MAX8840ELT45+T, and what happens beyond that limit?
The absolute maximum input voltage for the MAX8840ELT45+T is +7V. Exceeding this rating - even momentarily - risks permanent damage. Operation above 6V violates recommended conditions and may cause increased ground current, reduced PSRR, or premature thermal shutdown due to excessive power dissipation.
How does the MAX8840ELT45+T behave during shutdown, and what is its shutdown current?
When SHDN is pulled low (<0.4V), the MAX8840ELT45+T disables its voltage reference, error amplifier, and pass transistor, placing the OUT pin in high-impedance state. Shutdown supply current is ≤0.05µA at +85°C and <1µA across the full temperature range - ideal for long-term battery preservation in IoT endpoints.
MAX8840ELT45+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:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 4.5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.12V @ 120mA (Typ)
- 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)
MAX8840ELT45+T FAQ
1.How can I place an order for MAX8840ELT45+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8840ELT45+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 MAX8840ELT45+T reliable?
The price and inventory of MAX8840ELT45+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8840ELT45+T is usually 5 days.
3.What payment methods are accepted for MAX8840ELT45+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8840ELT45+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8840ELT45+T?
MAX8840ELT45+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8840ELT45+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 MAX8840ELT45+T?
For technical support, including MAX8840ELT45+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8840ELT45+T requirements.
6.How does Aetrix verify that MAX8840ELT45+T is sourced from the original manufacturer or authorized distributors?
All MAX8840ELT45+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 MAX8840ELT45+T meets industry standards.
7.What is the process for return or replacement of MAX8840ELT45+T?
All MAX8840ELT45+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX8840ELT45+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 MAX8840ELT45+T part is unused and in its original packaging.
Return procedure for MAX8840ELT45+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX8840ELT45+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…
