My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX8868EUK48
- Part No.:
- MAX8868EUK48
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX8868EUK48.pdf
- Description:
- LOW-NOISE, LOW-DROPOUT, 150MILLI
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX8868EUK48 from Maxim Integrated is a low-noise, low-dropout linear regulator with 4.8V preset output voltage, 150mA maximum output current, 30µVRMS output noise, and 165mV dropout at full load - designed for battery-powered portable electronics requiring stable, clean power under light-to-moderate load.
For engineers reviewing the MAX8868EUK48 datasheet, MAX8868EUK48 pinout, MAX8868EUK48 application, or MAX8868EUK48 equivalent, this page delivers verified electrical parameters, SOT23-5 pin mapping, auto-discharge functionality details, thermal protection behavior, and real-world capacitor selection guidance for stable operation.
Technical Context
The MAX8868EUK48 uses an internal P-channel MOSFET pass transistor (1.1Ω typical RDS(ON)) to achieve ultra-low quiescent current (100µA across all load and dropout conditions) and eliminate base-drive losses inherent in PNP-based LDOs. Its error amplifier compares a 1.25V bandgap reference against feedback from an internal resistor divider tied to the OUT pin.
Unlike the MAX8867, the MAX8868EUK48 integrates active auto-discharge via the SHDN pin: when driven low, it enables an internal discharge path to ground, reducing VOUT to <100mV within microseconds. It also includes reverse-battery protection limiting reverse current to 1mA and thermal shutdown at +155°C with +15°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.8V ±1.4% - factory-preset, no external resistors required; supports direct replacement of fixed-voltage rails in space-constrained designs. |
| Max Output Current | 150mA - sufficient for RF front-ends, microcontroller cores, or sensor signal chains without thermal derating in SOT23-5 regular package. |
| Dropout Voltage | 165mV at 150mA - enables operation down to VIN = 4.965V, extending usable battery life in single-cell Li-ion or 3×AA systems. |
| Output Noise | 30µVRMS (10Hz–100kHz) - achieved with 0.01µF BP capacitor; critical for noise-sensitive analog circuits like ADC references or RF synthesizers. |
| Quiescent Current | 100µA - constant across load, input voltage, and dropout; ensures minimal standby drain in always-on portable devices. |
| Shutdown Current | 10nA - logic-controlled shutdown reduces system-level leakage; compatible with deep-sleep MCU states. |
| Auto-Discharge | Active on SHDN low - discharges VOUT to GND rapidly; prevents back-powering of upstream circuitry during power-down sequences. |
Pinout & Package
SOT23-5 regular package (5-pin, 1.6mm × 2.9mm × 1.1mm), thermally enhanced with GND pin serving as heatsink - requires soldering to large copper area or ground plane for rated 571mW dissipation at +70°C ambient.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - SHDN | Active-low enable/discharge control | Drives low to enter 10nA shutdown and activate internal discharge FET; must be pulled high (to IN or VIN) for normal operation. |
| 2 - GND | Power ground and thermal path | Primary return path for load current and regulator bias; dual role as thermal conduction channel - PCB layout must maximize copper area. |
| 3 - IN | Input supply connection | Accepts 2.5V–6.5V; requires ≥1µF ceramic bypass to GND near pin to suppress line transients and ensure PSRR performance. |
| 4 - OUT | Regulated output | Delivers up to 150mA at 4.8V; requires 1µF–10µF low-ESR ceramic output capacitor for stability across -40°C to +85°C. |
| 5 - BP | Noise-reduction bypass node | Connects to 0.01µF ceramic capacitor to reduce output noise; forms 80Hz RC filter with internal 200kΩ resistor. |
Key Features
| Feature | Design Value |
|---|---|
| Low-noise regulation | 30µVRMS output noise with 0.01µF BP cap - enables clean power for precision analog sensors and RF ICs without additional filtering. |
| P-channel pass transistor | 1.1Ω typical RDS(ON) - eliminates base-drive current loss, maintaining 100µA IQ regardless of load or dropout condition. |
| Auto-discharge function | Active discharge path activated by SHDN low - pulls VOUT to <100mV in <10µs, preventing unintended back-powering of downstream circuitry. |
| Reverse battery protection | Limits reverse current to ≤1mA when VIN or SHDN falls below GND - protects device and system during incorrect battery insertion. |
| Thermal shutdown with hysteresis | Triggers at +155°C junction temperature, re-enables after cooling by +15°C - provides fault-safe operation without latch-up during sustained overload. |
Applications
| Cellular Handset RF Power Amplifier Bias | Palmtop Computer Core Voltage Rail |
|---|---|
|
Use Scenario: Providing stable 4.8V bias to GaAs RF power amplifier stages in GSM/EDGE handsets where supply ripple directly impacts EVM and ACLR. IC Role / Device Role / Timing Role: Low-noise LDO delivering clean, regulated DC bias independent of battery voltage sag during transmit bursts. Use Value: 30µVRMS noise and 63dB PSRR at low frequencies prevent AM-to-PM distortion; 165mV dropout extends talk time by 8–12 minutes per charge cycle. |
Use Scenario: Supplying core logic voltage to ARM7-based processor in palmtop computers operating from single-cell Li-ion batteries. IC Role / Device Role / Timing Role: Primary voltage regulator for CPU core, enabling dynamic voltage scaling while maintaining tight output accuracy across temperature. Use Value: ±1.4% output accuracy over -40°C to +85°C ensures reliable operation without margining; 100µA IQ extends standby time to >14 days. |
| PCMCIA Card I/O Interface Regulator | Electronic Planner Real-Time Clock (RTC) Backup |
|
Use Scenario: Generating 4.8V for PCMCIA card interface logic and level-shifting circuitry in laptop expansion slots. IC Role / Device Role / Timing Role: Isolated, low-ESR power source decoupled from noisy host system rails to meet JEDEC JESD8-12A noise requirements. Use Value: Auto-discharge on SHDN ensures rapid VOUT collapse during hot-plug removal, preventing bus contention or latch-up in host controller. |
Use Scenario: Providing backup power to RTC and SRAM in electronic planners during main battery removal or deep discharge. IC Role / Device Role / Timing Role: Secondary regulator powered from coin cell or supercapacitor, delivering precise 4.8V to maintain timekeeping integrity. Use Value: 10nA shutdown current minimizes backup source depletion; reverse-battery protection prevents damage if backup cell is inserted backward. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-noise LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX8867EUK48 | No auto-discharge; identical pinout, output voltage, and noise specs; 10nA shutdown only. | Suitable where fast VOUT discharge is unnecessary and cost sensitivity favors non-MAX8868 variant. | Select when system does not require active discharge and BOM consolidation with MAX8867 family is preferred. |
| Torex XC6206P482MR | 4.8V fixed output, 150mA, but higher 60µVRMS noise and no reverse-battery protection; SOT23-5 pinout matches. | Acceptable for digital-only loads where noise immunity is less critical; lacks MAX8868EUK48's safety features. | Choose only for cost-driven, non-safety-critical digital rails; verify thermal performance with 1.1Ω RDS(ON) vs. Torex's higher dropout. |
Compared with MAX8867EUK48 and XC6206P482MR, the MAX8868EUK48 uniquely combines auto-discharge, reverse-battery protection, and industry-leading 30µVRMS noise in a pin-compatible SOT23-5 footprint - making it the sole option for battery-powered systems requiring both functional safety and analog integrity.
Availability
MAX8868EUK48 is available at Aetrix Electronics and suitable for cellular telephones, palmtop computers, and PCMCIA cards requiring stable component supply, long-term lifecycle support, and guaranteed parametric compliance across industrial temperature range (-40°C to +85°C).
Supply support for MAX8868EUK48 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 semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, communications, and consumer applications.
The MAX8867/MAX8868 product line was engineered specifically for battery-powered portable electronics - prioritizing ultra-low quiescent current, low-noise regulation, and robust fault protection in miniature SOT23 packages.
FAQ
What is the exact output voltage tolerance of the MAX8868EUK48?
The MAX8868EUK48 has a factory-preset output voltage of 4.8V with guaranteed accuracy of ±1.4% over the full operating temperature range (-40°C to +85°C) and line/load conditions. This specification is 100% production tested at +25°C and correlation-validated across temperature using Statistical Quality Control methods - ensuring consistent performance in production-grade portable devices.
Does the MAX8868EUK48 require external resistors to set its output voltage?
No, the MAX8868EUK48 does not require external resistors. Its 4.8V output is internally preset using a laser-trimmed resistor divider, eliminating component count and layout area. This fixed-output architecture simplifies design, improves reliability, and avoids drift associated with external resistor tolerances or temperature coefficients - a key advantage over adjustable LDOs in space-constrained applications.
How does the auto-discharge function operate in the MAX8868EUK48?
When the SHDN pin of the MAX8868EUK48 is driven logic-low, the device enters shutdown mode and simultaneously activates an internal NMOS discharge switch between OUT and GND. This path actively pulls the output voltage to <100mV within microseconds - confirmed by oscilloscope measurements in the datasheet's Figure MAX8867/8-25. The function is exclusive to MAX8868 variants and absent in MAX8867EUK48.
What capacitor values are mandatory for stable operation of the MAX8868EUK48?
The MAX8868EUK48 requires a minimum 1µF ceramic output capacitor (X7R/X5R dielectric recommended) and a 0.01µF ceramic capacitor on the BP pin for specified noise performance. Input capacitance of ≥1µF is mandatory for transient response and PSRR. Using <1µF COUT risks instability across temperature and load, as shown in the "Region of Stable COUT ESR vs. Load Current" graph (Figure MAX8867/8-17).
Is the MAX8868EUK48 pin-compatible with other regulators in the same family?
Yes, the MAX8868EUK48 is pin-compatible with MAX8867EUK48, MAX8863, and MAX8864 in SOT23-5 packages - sharing identical IN, GND, OUT, SHDN, and BP pin assignments. However, the BP pin functionality differs: MAX8863/64 lack the internal 200kΩ resistor used with the 0.01µF capacitor for noise reduction, so noise performance will degrade if substituted without redesign.
MAX8868EUK48 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Bulk
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 6.5V
- Voltage - Output (Min/Fixed):
- 4.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.165V @ 150mA
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- 180 µA
- Current - Supply (Max):
- -
- PSRR:
- 63dB (10kHz)
- Control Features:
- Current Limit, Enable
- Protection Features:
- Over Current, Over Temperature, Reverse Polarity, Short Circuit
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MAX8868EUK48 FAQ
1.How can I place an order for MAX8868EUK48 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8868EUK48 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 MAX8868EUK48 reliable?
The price and inventory of MAX8868EUK48 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8868EUK48 is usually 5 days.
3.What payment methods are accepted for MAX8868EUK48?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8868EUK48 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8868EUK48?
MAX8868EUK48 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8868EUK48 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 MAX8868EUK48?
For technical support, including MAX8868EUK48 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8868EUK48 requirements.
6.How does Aetrix verify that MAX8868EUK48 is sourced from the original manufacturer or authorized distributors?
All MAX8868EUK48 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 MAX8868EUK48 meets industry standards.
7.What is the process for return or replacement of MAX8868EUK48?
All MAX8868EUK48 units undergo pre-shipment inspection (PSI). If there is an issue with MAX8868EUK48, 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 MAX8868EUK48 part is unused and in its original packaging.
Return procedure for MAX8868EUK48:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX8868EUK48 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
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
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…
