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Analog Devices Inc./Maxim Integrated MAX8867EZK32+T
- Part No.:
- MAX8867EZK32+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
MAX8867EZK32+T.pdf
- Description:
- IC REG LIN 3.2V 150MA TSOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,282
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Product details
Overview
MAX8867EZK32+T from Maxim Integrated is a low-noise, low-dropout linear regulator with a factory-preset 3.15V output, 150mA maximum output current, 30µVRMS output noise, and 165mV dropout at full load. It uses an internal P-channel MOSFET pass transistor and operates from 2.5V to 6.5V input, targeting space-constrained battery-powered systems such as handheld instruments and PCMCIA cards.
For engineers reviewing the MAX8867EZK32+T datasheet, MAX8867EZK32+T pinout, MAX8867EZK32+T application, or MAX8867EZK32+T equivalent, key selection criteria include guaranteed ±1.4% output voltage accuracy over temperature, 10nA shutdown current, reverse battery protection, and thin SOT23-5 package compatibility with high-density portable PCB layouts.
Technical Context
The MAX8867EZK32+T implements a bandgap-referenced error amplifier driving a P-channel MOSFET pass element with 1.1Ω typical RDS(ON). Its BP pin connects to an internal 200kΩ resistor forming an 80Hz low-pass filter for noise reduction when paired with a 0.01µF ceramic capacitor.
Thermal shutdown activates at +155°C with +15°C hysteresis, and current limiting holds output at 160–390mA depending on conditions. Reverse battery protection limits reverse current to 1mA when VIN or SHDN falls below ground, isolating internal circuitry without external diodes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.15V ±1.4% (factory preset; stable across -40°C to +85°C) |
| Max Output Current | 150mA continuous; supports peak loads in portable instrumentation without thermal derating under typical layout |
| Dropout Voltage | 165mV at 150mA (enables operation down to 3.315V input for 3.15V output; extends battery life in Li-ion and alkaline systems) |
| Output Noise | 30µVRMS (10Hz–100kHz; measured with 0.01µF BP cap and 10µF COUT; critical for RF and ADC power rails) |
| Quiescent Current | 100µA operating (load-independent); 10nA in shutdown (preserves battery charge during standby in handheld devices) |
| Input Voltage Range | 2.5V to 6.5V (supports single-cell Li-ion, two-cell alkaline, and regulated intermediate rails) |
| Protection Features | Thermal shutdown (+155°C), short-circuit tolerant, reverse battery protection (1mA max reverse current) |
Pinout & Package
MAX8867EZK32+T is housed in a thin 5-pin SOT23 package (JEDEC MO-178AA), with exposed pad not electrically connected. The GND pin serves dual function as electrical reference and thermal path - requires soldering to ≥25 mm² copper area for rated power dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: SHDN | Active-low enable input | Logic low disables regulator and reduces supply current to 10nA; no auto-discharge (distinguishes MAX8867 from MAX8868) |
| 2: GND | Ground reference & thermal sink | Must connect to large PCB copper area to maintain junction temperature ≤+150°C at full load |
| 3: IN | Input voltage supply | Accepts 2.5V–6.5V; requires ≥1µF bypass capacitor to suppress line transients and EMI |
| 4: OUT | Regulated output | Delivers up to 150mA; requires ≥1µF low-ESR output capacitor (X7R/X5R ceramic) for stability across temperature |
| 5: BP | Noise reduction bypass | Connects to internal 200kΩ resistor; 0.01µF ceramic cap reduces output noise to 30µVRMS |
Key Features
| Feature | Design Value |
|---|---|
| Low-noise regulation | 30µVRMS output noise enables clean power for precision analog and RF circuits without additional filtering |
| P-channel MOSFET pass element | Eliminates base-drive current loss; maintains 100µA quiescent current regardless of load or dropout condition |
| Reverse battery protection | Blocks >99.9% reverse current (≤1mA) when VIN or SHDN goes negative - prevents damage without external diode |
| Factory-trimmed output | ±1.4% initial accuracy over -40°C to +85°C eliminates need for external feedback resistors or calibration |
| Thermal and short-circuit robustness | Withstands indefinite output short to GND and cycles safely under thermal overload (155°C trip, 140°C restart) |
Applications
| Hand-Held Instruments | PCMCIA Cards |
|---|---|
|
Use Scenario: Portable multimeters and data loggers powered by two AA/AAA cells with tight board area constraints. IC Role / Device Role / Timing Role: Primary 3.15V supply for microcontroller, ADC, and display driver; replaces discrete LDO + filter networks. Use Value: 30µVRMS noise ensures <1 LSB error in 12-bit ADC conversions; thin SOT23-5 footprint saves >30% board area vs. standard SOT23. |
Use Scenario: Power management in hot-pluggable PCMCIA memory or modem cards requiring fast startup and reverse polarity tolerance. IC Role / Device Role / Timing Role: Standby and active-mode LDO delivering regulated 3.15V to card controller and interface logic. Use Value: 10nA shutdown current preserves host system battery during card removal; reverse battery protection avoids field failures from incorrect insertion. |
| Cordless Telephones | Electronic Planners |
|
Use Scenario: Base station and handset subsystems needing ultra-low quiescent current during sleep mode and low-noise rail for audio codec. IC Role / Device Role / Timing Role: Always-on 3.15V bias supply for real-time clock and wake-up circuitry; powers audio amplifier during call. Use Value: 100µA operating IQ extends standby time beyond 6 months on two NiMH cells; 165mV dropout allows full functionality until battery drops to 3.315V. |
Use Scenario: Low-power PDAs and scheduling assistants using single-cell Li-ion batteries with aggressive energy budgeting. IC Role / Device Role / Timing Role: Main system regulator for processor, touchscreen controller, and flash memory interface. Use Value: Factory-set 3.15V eliminates BOM cost and layout complexity of adjustable LDOs; ±1.4% accuracy guarantees reliable boot and memory operation across temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-noise LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX8867EUK32+T | Same electrical specs but in regular (not thin) SOT23-5 package; 0.95mm height vs. 0.8mm for EZK variant | Preferred where board clearance >0.8mm allows use of higher-volume regular SOT23; identical thermal resistance θJB = 140°C/W | Select when mechanical stack-up permits taller package and standard SOT23 tooling is preferred. |
| MCP1700T-315I/TT | 300mA rated, 17µVRMS noise, 6V max input, but 2.3µA quiescent current (vs. 100µA); no reverse battery protection | Better noise and current capability, but lacks reverse polarity hardening and thermal hysteresis control of MAX8867EZK32+T | Choose only if reverse battery risk is eliminated externally and lower IQ is not required. |
Compared with MAX8867EUK32+T, the MAX8867EZK32+T offers identical regulation performance in a 0.15mm lower profile for ultra-thin assemblies; versus MCP1700T-315I/TT, it trades higher quiescent current for integrated reverse-battery safety and tighter output accuracy - critical for unattended portable deployments.
Availability
MAX8867EZK32+T is available at Aetrix Electronics and suitable for hand-held instruments, PCMCIA cards, cordless telephones, and electronic planners requiring stable component supply with guaranteed long-term manufacturability and consistent parametric performance.
Supply support for MAX8867EZK32+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) designs precision analog, mixed-signal, and power-management ICs for demanding industrial, medical, and portable applications.
The MAX8867/MAX8868 product line delivers ultra-low-noise, low-IQ LDOs optimized for battery-powered equipment where size, efficiency, and reliability are non-negotiable - especially in handheld and modular form factors.
FAQ
What is the exact output voltage of MAX8867EZK32+T?
The MAX8867EZK32+T has a factory-preset output voltage of 3.15V with ±1.4% accuracy over the full operating temperature range (-40°C to +85°C). This value is laser-trimmed during production and does not require external resistors. The "32" suffix in the part number directly encodes the 3.15V output per Maxim's expanded ordering table.
Does MAX8867EZK32+T include auto-discharge functionality?
No, MAX8867EZK32+T does not provide auto-discharge. That feature is exclusive to the MAX8868 family (e.g., MAX8868EZK32+T). When MAX8867EZK32+T enters shutdown via the SHDN pin, the output floats; external circuitry is required to discharge the output capacitor if needed.
What capacitor values are required for stable operation of MAX8867EZK32+T?
For stable operation, MAX8867EZK32+T requires a minimum 1µF X7R or X5R ceramic capacitor on the OUT pin (ESR < 0.2Ω), a 1µF capacitor on IN, and a 0.01µF ceramic capacitor on the BP pin. Larger output capacitance (up to 10µF) improves PSRR and transient response but does not affect basic stability.
Can MAX8867EZK32+T operate with a 2.5V input while delivering 3.15V output?
No - MAX8867EZK32+T cannot regulate 3.15V output from a 2.5V input. Its minimum input voltage is defined by dropout: VIN ≥ VOUT + VDROP. At 150mA, VDROP = 165mV, so minimum VIN = 3.315V. Operation below that causes unregulated output collapse.
Is reverse battery protection active on MAX8867EZK32+T?
Yes, MAX8867EZK32+T includes integrated reverse battery protection. If VIN or SHDN falls below ground, internal circuitry disconnects parasitic paths and limits reverse current to ≤1mA - protecting both the IC and upstream battery without external components.
MAX8867EZK32+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-5 Thin, TSOT-23-5
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 6.5V
- Voltage - Output (Min/Fixed):
- 3.2V
- 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:
- TSOT-23-5
MAX8867EZK32+T FAQ
1.How can I place an order for MAX8867EZK32+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8867EZK32+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 MAX8867EZK32+T reliable?
The price and inventory of MAX8867EZK32+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8867EZK32+T is usually 5 days.
3.What payment methods are accepted for MAX8867EZK32+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8867EZK32+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8867EZK32+T?
MAX8867EZK32+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8867EZK32+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 MAX8867EZK32+T?
For technical support, including MAX8867EZK32+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8867EZK32+T requirements.
6.How does Aetrix verify that MAX8867EZK32+T is sourced from the original manufacturer or authorized distributors?
All MAX8867EZK32+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 MAX8867EZK32+T meets industry standards.
7.What is the process for return or replacement of MAX8867EZK32+T?
All MAX8867EZK32+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX8867EZK32+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 MAX8867EZK32+T part is unused and in its original packaging.
Return procedure for MAX8867EZK32+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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