My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX8868EUK25-T
- Part No.:
- MAX8868EUK25-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX8868EUK25-T.pdf
- Description:
- IC REG LINEAR LDO
- Quantity:
- Payment:
- Shipping:
Inventory:50,000
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX8868EUK25-T from Maxim Integrated is a low-noise, low-dropout linear regulator with 2.5V preset output, 150mA output current capability, 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 MAX8868EUK25-T datasheet, MAX8868EUK25-T pinout, MAX8868EUK25-T application, or MAX8868EUK25-T equivalent, key selection criteria include auto-discharge functionality, reverse battery protection, thermal shutdown behavior, BP-capacitor–dependent noise performance, and SOT23-5 package compatibility with PCB layout constraints.
Technical Context
The MAX8868EUK25-T uses an internal P-channel MOSFET pass transistor (1.1Ω typical RDS(ON)) to achieve 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 MAX8868EUK25-T integrates active auto-discharge via SHDN assertion - pulling OUT to GND through a 300Ω internal discharge path - and includes dedicated BP pin filtering (0.01µF ceramic) that forms an 80Hz low-pass filter to reduce output noise by coupling into the reference node.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.5V ±1.4% - factory-preset, no external resistors required; enables compact, low-BOM-count power rail design. |
| Max Output Current | 150mA - sufficient for RF front-ends, microcontroller cores, or sensor signal chains in handheld devices. |
| Dropout Voltage | 165mV at 150mA - allows operation down to VIN = 2.65V, extending usable battery life in single-cell Li-ion or alkaline systems. |
| Output Noise | 30µVRMS (10Hz–100kHz) - achieved with 0.01µF BP capacitor; critical for noise-sensitive analog/RF stages. |
| Quiescent Current | 100µA (operating), 10nA (shutdown) - enables >1-year shelf life in always-on battery-backed applications. |
| Shutdown Discharge | 300Ω active pull-down - discharges 10µF output cap to <100mV in ~3ms; prevents residual voltage from interfering with system reset sequencing. |
| PSRR | 63dB @ 100Hz, rolling off above 10kHz - adequate for rejecting low-frequency supply ripple but not high-speed switching noise. |
Pinout & Package
SOT23-5 regular package (JEDEC MO-178AA); 5-pin surface-mount with exposed pad not present; GND pin serves dual role as electrical ground and primary thermal path - requires direct connection to large copper pour or ground plane for thermal reliability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - SHDN | Active-low enable/discharge control | Logic low (≤0.4V) disables regulator and activates 300Ω discharge path on MAX8868EUK25-T; must be pulled high (to IN or VIN) for normal operation. |
| 2 - GND | Power ground & thermal sink | Reference node for all internal circuitry; soldered to ≥25mm² copper area to maintain TJ < +150°C at max load and ambient. |
| 3 - IN | Input voltage supply | Accepts 2.5V–6.5V; requires ≥1µF low-ESR ceramic bypass to GND within 5mm of pin to suppress line transients and ensure stability. |
| 4 - OUT | Regulated output | Delivers 2.5V @ up to 150mA; requires ≥1µF output capacitor (X7R/X5R dielectric preferred) for stability across -40°C to +85°C. |
| 5 - BP | Noise-reduction bypass | Connects to internal 200kΩ resistor forming RC filter with external 0.01µF ceramic cap; determines output noise floor and startup time. |
Key Features
| Feature | Design Value |
|---|---|
| Auto-discharge on shutdown | 300Ω internal discharge path actively pulls OUT to GND during SHDN assertion - eliminates need for external bleed resistors in reset-critical systems. |
| Reverse battery protection | Limits reverse current to ≤1mA when VIN or SHDN falls below GND - prevents damage during incorrect battery insertion in consumer handhelds. |
| Thermal shutdown with hysteresis | Triggers at +155°C junction temperature; re-enables after 20°C cooldown - provides fault-tolerant operation without latch-up during sustained overload. |
| P-channel pass transistor | 1.1Ω typical RDS(ON) eliminates base-drive current - ensures 100µA IQ remains constant across dropout, light-load, and heavy-load conditions. |
| Current limiting | 160mA minimum / 500mA maximum foldback limit - protects downstream circuitry during short-circuit events while allowing safe indefinite shorting to GND. |
Applications
| Cellular Handset Power Rail | PCMCIA Card LDO |
|---|---|
Use Scenario: Supplies 2.5V core voltage to baseband processor and RF transceiver in GSM/EDGE handsets operating from single-cell Li-ion (2.7V–4.2V). IC Role / Device Role / Timing Role: Primary low-noise LDO delivering regulated 2.5V with fast load-transient response (<12mV deviation for 0→50mA step) and auto-discharge during power-off sequencing. Use Value: Enables clean power delivery without external filtering components; 30µVRMS noise avoids degradation of receiver sensitivity and ADC SNR. |
Use Scenario: Powers 2.5V I/O interface and controller logic in hot-pluggable PCMCIA Type II cards used in industrial laptops and data loggers. IC Role / Device Role / Timing Role: Regulator with reverse battery protection and thermal shutdown - safeguards card electronics during accidental reverse insertion or overtemperature events. Use Value: Prevents field failures due to user handling errors; 10nA shutdown current extends host battery life during card idle states. |
| Palmtop Computer Core Supply | Electronic Planner System-on-Chip Bias |
Use Scenario: Provides 2.5V supply to ARM7TDMI CPU core and SRAM in palm-sized PDAs with tight board space and thermal constraints. IC Role / Device Role / Timing Role: Compact SOT23-5 LDO with integrated thermal management - maintains regulation during burst-mode CPU activity without external heatsinking. Use Value: 165mV dropout extends runtime per charge cycle; GND pin thermal conduction to PCB ground plane replaces discrete thermal vias. |
Use Scenario: Delivers precision 2.5V bias to real-time clock (RTC), touch-screen controller, and flash memory interface in battery-backed electronic planners. IC Role / Device Role / Timing Role: Low-drift, low-noise regulator with ±1.4% output accuracy and 30µVRMS noise - ensures accurate timekeeping and reliable flash programming. Use Value: Factory-trimmed output eliminates calibration overhead; BP-filtered reference minimizes timing jitter induced by supply noise. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-noise, 2.5V LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX8867EUK25-T | No auto-discharge; identical pinout, noise, dropout, and quiescent current - differs only in absence of SHDN-triggered output discharge path. | Suitable where system-level discharge is handled externally or unnecessary; lower cost where auto-discharge is not required. | Select MAX8867EUK25-T if discharge is managed by MCU GPIO or external FET; choose MAX8868EUK25-T only when guaranteed rapid output collapse is mandatory. |
| MCP1700T-2502E/MB | Higher 170mV dropout at 150mA; 17µVRMS noise; no BP pin or reverse battery protection; 2.5V fixed output in SOT23-3 (3-pin, no SHDN/BP). | Targeted at ultra-low-cost, non-critical rails where size and BOM count outweigh noise and protection requirements. | Use MCP1700T-2502E/MB only in cost-sensitive designs accepting higher dropout and missing safety features; not drop-in due to 3-pin vs. 5-pin package and missing SHDN/BP functions. |
Compared with MAX8867EUK25-T, the MAX8868EUK25-T adds verified auto-discharge without sacrificing noise or efficiency; versus MCP1700T-2502E/MB, it delivers superior protection, lower noise, and configurable shutdown - justifying its use in mission-critical portable power rails.
Availability
MAX8868EUK25-T is available at Aetrix Electronics and suitable for cellular telephones, PCMCIA cards, palmtop computers, and electronic planners requiring stable component supply, long-term lifecycle support, and guaranteed parametric compliance across -40°C to +85°C.
Supply support for MAX8868EUK25-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 MAX8867/MAX8868 product line was engineered specifically for battery-powered portable electronics - prioritizing ultra-low noise, minimal quiescent current, and robust fault protection in space-constrained SOT23 packages.
FAQ
What is the output voltage tolerance of the MAX8868EUK25-T over temperature and load?
The MAX8868EUK25-T guarantees ±1.4% output voltage accuracy over the full -40°C to +85°C operating temperature range and 0mA to 150mA load current. Typical output voltage drift is less than ±0.5% across temperature, as shown in Figure MAX8867/8-07 of the datasheet. This specification applies directly to the MAX8868EUK25-T and is confirmed by 100% production testing at +25°C with statistical correlation over temperature.
Does the MAX8868EUK25-T require an external BP capacitor, and what happens if it is omitted?
Yes, the MAX8868EUK25-T requires a 0.01µF ceramic capacitor between BP and GND to achieve its specified 30µVRMS output noise. Omitting the BP capacitor increases output noise to approximately 200µVRMS (typical), degrades PSRR above 1kHz, and may cause instability under certain load and ESR conditions. The BP pin is not optional - it connects to an internal 200kΩ resistor forming a critical noise-filtering network.
How does the auto-discharge function of the MAX8868EUK25-T operate during shutdown?
When SHDN is pulled low, the MAX8868EUK25-T activates an internal 300Ω NMOS discharge switch between OUT and GND. This path actively pulls the output voltage to <100mV within ~3ms for a 10µF output capacitor. The discharge occurs independently of input voltage and continues until SHDN is released. This behavior is exclusive to the MAX8868 series and is not present in the MAX8867EUK25-T.
Can the MAX8868EUK25-T be used with input voltages below 2.5V?
No - the absolute minimum input voltage for the MAX8868EUK25-T is 2.5V, as specified in the Absolute Maximum Ratings table. Operation below 2.5V violates the device's functional specification and may result in unregulated output, increased dropout, or failure to start. For sub-2.5V inputs, consider alternative regulators such as the MAX1726 or MAX8881 with lower VIN minima.
What thermal derating applies to the MAX8868EUK25-T in SOT23-5 regular package?
The MAX8868EUK25-T in SOT23-5 regular package has a continuous power dissipation limit of 571mW at +70°C ambient, with a thermal derating factor of 7.1mW/°C above +70°C. This assumes proper PCB layout: GND pin soldered to ≥25mm² copper area. Without adequate copper, junction temperature may exceed +150°C even at moderate loads - triggering thermal shutdown.
MAX8868EUK25-T 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):
- 2.5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.165V @ 150mA (Typ)
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- 180 µA
- Current - Supply (Max):
- 100 µA
- PSRR:
- 63dB (10kHz)
- Control Features:
- 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
MAX8868EUK25-T FAQ
1.How can I place an order for MAX8868EUK25-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8868EUK25-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 MAX8868EUK25-T reliable?
The price and inventory of MAX8868EUK25-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8868EUK25-T is usually 5 days.
3.What payment methods are accepted for MAX8868EUK25-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8868EUK25-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8868EUK25-T?
MAX8868EUK25-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8868EUK25-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 MAX8868EUK25-T?
For technical support, including MAX8868EUK25-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8868EUK25-T requirements.
6.How does Aetrix verify that MAX8868EUK25-T is sourced from the original manufacturer or authorized distributors?
All MAX8868EUK25-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 MAX8868EUK25-T meets industry standards.
7.What is the process for return or replacement of MAX8868EUK25-T?
All MAX8868EUK25-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX8868EUK25-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 MAX8868EUK25-T part is unused and in its original packaging.
Return procedure for MAX8868EUK25-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX8868EUK25-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
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…
