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Analog Devices Inc./Maxim Integrated MAX8867EZK27+T
- Part No.:
- MAX8867EZK27+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
MAX8867EZK27+T.pdf
- Description:
- IC REG LIN 2.7V 150MA TSOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,087
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Product details
Overview
MAX8867EZK27+T from Maxim Integrated is a low-noise, low-dropout linear regulator with 2.7V preset output voltage, 150mA output current capability, 30µVRMS output noise, and 165mV dropout at full load. It uses an internal P-channel MOSFET pass transistor, operates from 2.5V to 6.5V input, and features 10nA logic-controlled shutdown - ideal for battery-powered handheld instruments and PCMCIA cards.
For engineers reviewing the MAX8867EZK27+T datasheet, MAX8867EZK27+T pinout, MAX8867EZK27+T application, or MAX8867EZK27+T equivalent, key selection criteria include output voltage accuracy (±1.4%), thermal shutdown behavior (155°C trip), reverse battery protection, BP-capacitor–dependent noise reduction, and SOT23-5 thin-package thermal performance (θJB = 110°C/W).
Technical Context
The MAX8867EZK27+T implements a fixed-output LDO architecture with a 1.25V bandgap reference, error amplifier, and internal resistor divider setting VOUT = 2.7V. Its P-channel MOSFET pass element delivers 165mV dropout at 150mA and maintains 100µA quiescent current across load and dropout conditions.
It integrates reverse battery protection limiting reverse current to 1mA, thermal shutdown with 15°C hysteresis, and short-circuit protection. The BP pin accepts a 0.01µF ceramic capacitor to form an 80Hz low-pass filter that reduces output noise to 30µVRMS (10Hz–100kHz) when paired with a 10µF COUT.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.7V ±1.4% - factory-preset, no external feedback required |
| Max Output Current | 150mA - supports moderate-power analog/digital loads without thermal derating in thin SOT23 |
| Dropout Voltage | 165mV at 150mA - enables operation down to VIN = 2.87V with stable 2.7V output |
| Output Noise | 30µVRMS (10Hz–100kHz) - achieved with 0.01µF BP cap and 10µF COUT; critical for RF/ADC power rails |
| Quiescent Current | 100µA - constant across load and dropout; extends battery life in always-on systems |
| Shutdown Current | 10nA - enables ultra-low-power sleep modes in portable devices |
| Thermal Shutdown | 155°C trip, 140°C recovery - protects against sustained overload in compact layouts |
Pinout & Package
SOT23-5 thin package (JEDEC MO-178AA), 2.9mm × 1.6mm × 1.1mm body height, GND pin serves as thermal pad - requires soldering to PCB ground plane for rated power dissipation (727mW at +70°C, derated 9.1mW/°C above).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - SHDN | Active-low enable input | Logic low disables regulator and reduces IQ to 10nA; not auto-discharge (MAX8868 feature only) |
| 2 - GND | Power and thermal ground | Primary return path and heatsink; must connect to large copper area for thermal management |
| 3 - IN | Input supply connection | Accepts 2.5V–6.5V; requires ≥1µF bypass capacitor to suppress supply noise |
| 4 - OUT | Regulated output | Delivers up to 150mA at 2.7V; requires 1–10µF output capacitor (X7R/X5R preferred) for stability |
| 5 - BP | Noise-reduction bypass node | Connects to 0.01µF ceramic cap to reduce output noise via internal 200kΩ filter network |
Key Features
| Feature | Design Value |
|---|---|
| Low-noise regulation | 30µVRMS output noise with 0.01µF BP cap - meets stringent noise requirements for precision analog/RF circuits |
| P-channel MOSFET pass element | 1.1Ω typical RDS(ON) - eliminates base-drive current loss, enabling stable 100µA IQ across all operating conditions |
| Reverse battery protection | ≤1mA reverse current when VIN or SHDN < 0V - prevents damage during incorrect battery insertion |
| Thermal and short-circuit protection | 155°C shutdown with 15°C hysteresis and infinite short-circuit duration rating - ensures robustness in unattended operation |
| Preset output accuracy | ±1.4% over -40°C to +85°C - eliminates calibration overhead in production for 2.7V rail generation |
Applications
| Hand-Held Instruments | PCMCIA Cards |
|---|---|
Use Scenario: Portable multimeters and data loggers powered by single-cell Li-ion or alkaline batteries. IC Role / Device Role / Timing Role: Primary 2.7V supply for microcontroller, ADC, and display driver circuitry. Use Value: 100µA quiescent current extends battery runtime; 30µVRMS noise avoids ADC quantization errors. | Use Scenario: Hot-pluggable PCMCIA memory or modem cards requiring clean, regulated 2.7V I/O supply. IC Role / Device Role / Timing Role: Local LDO delivering stable 2.7V from variable host bus voltage (3.3V/5V). Use Value: Reverse battery protection prevents damage during card insertion/removal; 165mV dropout ensures regulation even under low host voltage sag. |
| Palmtop Computers | Cordless Telephones |
Use Scenario: Compact PDAs with dual-rail power architecture needing efficient 2.7V core/peripheral supply. IC Role / Device Role / Timing Role: Secondary LDO generating 2.7V from main 3.3V rail for low-power logic and interface ICs. Use Value: Thin SOT23-5 footprint saves board space; thermal shutdown (155°C) prevents overheating in sealed enclosures. | Use Scenario: DECT cordless handsets using single-cell NiMH batteries with discharge down to 2.8V. IC Role / Device Role / Timing Role: Main 2.7V supply for RF transceiver, audio codec, and MCU subsystems. Use Value: 165mV dropout allows >95% battery utilization; 10nA shutdown current preserves charge during standby. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-noise LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX8867EUK27-T | Same electrical specs, but in regular-height SOT23-5 (θJB = 140°C/W, 571mW max PD) | Less aggressive thermal performance; suitable where board height >1.3mm is acceptable | Select for cost-sensitive designs where thermal margin is sufficient and board clearance permits taller package |
| TPS76327QDBVRQ1 | 2.7V, 150mA, 35µVRMS noise, 250mV dropout at 150mA, automotive-grade (-40°C to +125°C) | Higher dropout and noise; wider temp range; AEC-Q100 qualified | Select for automotive infotainment modules requiring extended temperature operation and qualification |
Compared with MAX8867EUK27-T, the MAX8867EZK27+T offers superior thermal resistance (110°C/W vs. 140°C/W) and lower profile - critical for ultra-thin handhelds. Versus TPS76327QDBVRQ1, it delivers lower noise and dropout but lacks automotive qualification and extended temperature range.
Availability
MAX8867EZK27+T is available at Aetrix Electronics and suitable for hand-held instruments, PCMCIA cards, palmtop computers, and cordless telephones requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production lots.
Supply support for MAX8867EZK27+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 high-performance analog, mixed-signal, and power-management ICs for demanding applications in industrial, communications, and consumer markets.
The MAX8867/MAX8868 product line targets battery-powered portable electronics requiring ultra-low noise, low quiescent current, and robust protection - optimized for space-constrained, single-cell systems.
FAQ
What is the exact output voltage tolerance of the MAX8867EZK27+T over temperature?
The MAX8867EZK27+T guarantees ±1.4% output voltage accuracy over the full operating temperature range of -40°C to +85°C. This specification includes initial tolerance, line regulation, load regulation, and temperature drift - verified per Maxim's Statistical Quality Control methodology and confirmed in the Electrical Characteristics table on page 2 of the datasheet.
Does the MAX8867EZK27+T provide auto-discharge functionality during shutdown?
No, the MAX8867EZK27+T does not include auto-discharge. That feature is exclusive to the MAX8868 variant (e.g., MAX8868EZK27+T). When the MAX8867EZK27+T is placed in shutdown (SHDN = low), the output floats; external circuitry is required to discharge the output capacitor if needed.
What capacitor values are recommended for stable operation of the MAX8867EZK27+T?
For stable operation, use a minimum 1µF X7R or X5R ceramic capacitor on the IN pin and 1–10µF on the OUT pin. A 0.01µF ceramic capacitor is mandatory on the BP pin. Avoid Z5U/Y5V dielectrics below -10°C; for wide-temp reliability, 2.2µF X7R is recommended. ESR must remain within the stable region shown in Figure 17 (Region of Stable COUT ESR vs. Load Current).
How does reverse battery protection work in the MAX8867EZK27+T?
The MAX8867EZK27+T monitors polarity at both IN and SHDN pins. If either falls below ground, internal circuitry disconnects parasitic paths, limiting reverse current to ≤1mA. This prevents damage during incorrect battery installation or accidental reverse connection - a hardware-level safeguard independent of external components.
What is the thermal resistance (θJB) of the MAX8867EZK27+T package?
MAX8867EZK27+T uses the thin SOT23-5 package with a junction-to-board thermal resistance (θJB) of 110°C/W, as specified in the Absolute Maximum Ratings table. This value assumes proper soldering of the GND pin to a PCB ground plane - essential to achieve the rated 727mW power dissipation at +70°C.
MAX8867EZK27+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):
- 2.7V
- 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
MAX8867EZK27+T FAQ
1.How can I place an order for MAX8867EZK27+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8867EZK27+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 MAX8867EZK27+T reliable?
The price and inventory of MAX8867EZK27+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8867EZK27+T is usually 5 days.
3.What payment methods are accepted for MAX8867EZK27+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8867EZK27+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8867EZK27+T?
MAX8867EZK27+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8867EZK27+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 MAX8867EZK27+T?
For technical support, including MAX8867EZK27+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8867EZK27+T requirements.
6.How does Aetrix verify that MAX8867EZK27+T is sourced from the original manufacturer or authorized distributors?
All MAX8867EZK27+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 MAX8867EZK27+T meets industry standards.
7.What is the process for return or replacement of MAX8867EZK27+T?
All MAX8867EZK27+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX8867EZK27+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 MAX8867EZK27+T part is unused and in its original packaging.
Return procedure for MAX8867EZK27+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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