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Analog Devices Inc./Maxim Integrated MAX8867EZK50+T
- Part No.:
- MAX8867EZK50+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
MAX8867EZK50+T.pdf
- Description:
- IC REG LINEAR 5V 150MA TSOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,152
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Product details
Overview
MAX8867EZK50+T from Maxim Integrated is a low-noise, low-dropout linear regulator with 5.0V preset output, 150mA output current capability, 30µVRMS output noise, and 165mV dropout at full load - designed for battery-powered handheld instruments requiring stable, ultra-low-noise supply rails.
For engineers reviewing the MAX8867EZK50+T datasheet, MAX8867EZK50+T pinout, MAX8867EZK50+T application, or MAX8867EZK50+T equivalent, key selection criteria include dropout voltage under load, shutdown current (10nA), BP-capacitor–dependent noise performance, thermal protection behavior, and SOT23-5 thin-package thermal derating (9.1mW/°C above +70°C).
Technical Context
The MAX8867EZK50+T uses an internal P-channel MOSFET pass transistor (1.1Ω typical RDS(ON)) to achieve low quiescent current (100µA across 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 OUT.
Noise reduction is implemented via a dedicated BP pin connected to an internal 200kΩ resistor, forming an 80Hz low-pass filter with an external 0.01µF ceramic capacitor - enabling 30µVRMS output noise (10Hz–100kHz) when paired with COUT = 10µF. The device 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 | 5.0V ±1.4% - factory-preset, no external resistors required; supports fixed-rail systems like 5V microcontroller I/O domains. |
| Max Output Current | 150mA - sufficient for low-power RF front-ends, sensor signal chains, or MCU peripherals without thermal throttling in thin SOT23. |
| Dropout Voltage | 165mV at 150mA - enables operation down to VIN = 5.165V, extending usable battery life in single-cell Li-ion or 3×AA applications. |
| Output Noise | 30µVRMS (10Hz–100kHz) - achieved with 0.01µF BP cap and 10µF COUT; critical for ADC reference supplies and RF synthesizer VCOs. |
| Quiescent Current | 100µA (operating), 10nA (shutdown) - maintains battery shelf life >1 year in always-on portable devices with periodic wake-up cycles. |
| PSRR | 63dB at 100Hz, rolling off above 10kHz - adequate for filtering switching regulator ripple but not suitable as primary post-regulator for high-frequency SMPS. |
| Thermal Shutdown | +155°C activation, +140°C recovery - provides pulsed safe-mode operation during sustained overload, preventing permanent junction damage. |
Pinout & Package
SOT23-5 thin package (JEDEC MO-178AA), 2.9mm × 1.6mm × 1.1mm body height, GND pin serves dual function as electrical ground and thermal path - requires soldering to ≥25mm² copper pour for rated 727mW dissipation at +70°C ambient.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: SHDN | Active-low enable input | Logic low disables regulator and reduces supply current to 10nA; open or pulled high to IN enables operation. |
| 2: GND | Ground reference & thermal pad | Primary return path for load current and internal bias; must be connected to large PCB copper area for thermal management. |
| 3: IN | Input voltage supply | Accepts 2.5V–6.5V; requires ≥1µF bypass capacitor to suppress input ripple and ensure stability. |
| 4: OUT | Regulated output | Delivers up to 150mA at 5.0V; requires 1–10µF output capacitor (X7R/X5R ceramic preferred) for transient response and ESR stability. |
| 5: BP | Noise-reduction bypass node | Connects to internal 200kΩ resistor; 0.01µF ceramic cap here sets 80Hz filter pole to reduce reference noise contribution to output. |
Key Features
| Feature | Design Value |
|---|---|
| Low-noise regulation | 30µVRMS output noise with 0.01µF BP cap - enables clean power for precision analog circuits without additional filtering stages. |
| P-channel pass transistor | 1.1Ω typical RDS(ON) - eliminates base-drive current loss, ensuring 100µA IQ remains constant across load and dropout conditions. |
| Reverse battery protection | 1mA max reverse current when VIN or SHDN < 0V - prevents damage and data corruption in consumer handhelds with user-replaceable batteries. |
| Thermal-overload protection | +155°C shutdown with +15°C hysteresis - allows temporary overloads while protecting die integrity; self-recovering under intermittent fault conditions. |
| Preset output accuracy | ±1.4% over -40°C to +85°C - eliminates calibration overhead in production test for cost-sensitive portable electronics. |
Applications
| Hand-Held Instruments | PCMCIA Cards |
|---|---|
Use Scenario: Portable multimeters and handheld oscilloscopes powered by 3×AA alkaline cells with dynamic load steps up to 100mA. IC Role / Device Role / Timing Role: Primary 5.0V supply for microcontroller, display driver, and 12-bit SAR ADC reference rail. Use Value: 30µVRMS noise ensures <0.5LSB code spread in 12-bit measurements; 165mV dropout extends battery runtime to 4.5V cutoff. |
Use Scenario: Hot-pluggable PCMCIA memory or modem cards drawing burst currents up to 120mA during data transfer. IC Role / Device Role / Timing Role: Local 5.0V LDO for card controller logic and interface buffers, isolated from noisy host 5V bus. Use Value: 10nA shutdown current prevents parasitic drain when card is ejected; reverse-battery protection avoids latch-up during insertion misalignment. |
| Palmtop Computers | Electronic Planners |
Use Scenario: Early-generation palmtops (e.g., PalmPilot) using single Li-ion cell (2.7–4.2V) to power 5V peripheral interfaces and backlight drivers. IC Role / Device Role / Timing Role: Step-up-independent 5V rail generator replacing charge-pump solutions with lower noise and higher efficiency. Use Value: 100µA operating IQ minimizes standby drain; thermal shutdown prevents overheating during CPU-intensive sync operations. |
Use Scenario: Low-cost electronic organizers with segmented LCD and button interface, powered by coin-cell or AAA batteries. IC Role / Device Role / Timing Role: Main system regulator delivering stable 5.0V to microcontroller and real-time clock, active only during user interaction. Use Value: ±1.4% output accuracy eliminates need for external trimming; 1.1mm thin SOT23-5 fits tight board height constraints (<1.2mm). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-noise, 5V-output LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS76350DBVR | Higher 220mV dropout at 150mA; 50µVRMS noise; 85µA IQ; SOT23-5 package. | Lacks BP pin and reverse-battery protection; requires external noise-filtering components for ADC-grade rails. | Choose if cost sensitivity outweighs noise and protection requirements; verify thermal margin with 7.1mW/°C derating. |
| MCP1703T-5002E/MB | 170mV dropout at 150mA; 40µVRMS noise; 2.5µA IQ (no shutdown); SOT23-5 package. | No shutdown control or auto-discharge; no reverse-battery protection; tighter ±0.5% initial accuracy but wider temp drift. | Prefer for ultra-low-IQ always-on monitoring nodes where shutdown is unnecessary and noise tolerance is relaxed. |
Compared with TPS76350DBVR and MCP1703T-5002E/MB, the MAX8867EZK50+T delivers superior noise performance (30µVRMS vs. ≥40µVRMS), integrated reverse-battery protection, and guaranteed 10nA shutdown - making it optimal for battery-critical, noise-sensitive portable instrumentation where reliability and signal integrity are prioritized over minimal BOM count.
Availability
MAX8867EZK50+T is available at Aetrix Electronics and suitable for hand-held instruments, PCMCIA cards, palmtop computers, and electronic planners requiring stable component supply with guaranteed long-term lifecycle support and traceable sourcing.
Supply support for MAX8867EZK50+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 designed specifically for space-constrained, battery-powered portable electronics requiring ultra-low noise, low IQ, and robust fault protection - targeting handheld test equipment, mobile peripherals, and legacy PDAs.
FAQ
What is the maximum input voltage rating for the MAX8867EZK50+T?
The MAX8867EZK50+T has an absolute maximum input voltage of +7V applied to the IN pin, but its functional operating range is specified from 2.5V to 6.5V. Exceeding 6.5V may cause excessive power dissipation or violate SOA limits, especially at elevated temperatures. Always maintain VIN ≤ 6.5V during normal operation to ensure reliability and meet datasheet performance guarantees for the MAX8867EZK50+T.
Does the MAX8867EZK50+T include reverse-battery protection, and how does it behave?
Yes, the MAX8867EZK50+T includes integrated reverse-battery protection that limits reverse current to ≤1mA when either IN or SHDN falls below ground potential. This is achieved by disconnecting internal circuitry and parasitic paths - preventing damage and data corruption in handheld devices with user-accessible battery compartments. This feature is confirmed in the Absolute Maximum Ratings and Detailed Description sections of the MAX8867EZK50+T datasheet.
What capacitor values are recommended for stable operation of the MAX8867EZK50+T?
For stable operation, the MAX8867EZK50+T requires a minimum 1µF X7R/X5R ceramic capacitor on IN and 1–10µF on OUT (1µF minimum for full temperature/load range). A 0.01µF ceramic capacitor must be placed on BP to achieve 30µVRMS noise. High-ESR tantalum capacitors require ≥2.2µF on OUT to remain within the stable ESR region shown in Figure 17 of the MAX8867EZK50+T datasheet.
How does the BP pin affect noise and startup time in the MAX8867EZK50+T?
The BP pin connects to an internal 200kΩ resistor, forming an RC low-pass filter with the external capacitor. A 0.01µF BP capacitor sets an 80Hz pole, reducing reference noise contribution and achieving 30µVRMS output noise. Increasing BP capacitance lowers noise slightly but increases startup time - values >0.1µF provide no meaningful noise benefit and degrade turn-on response, as verified in the Shutdown Exit Delay curves for the MAX8867EZK50+T.
Is the MAX8867EZK50+T pin-compatible with other regulators in the MAX886x family?
Yes, the MAX8867EZK50+T is pin-compatible with the MAX8863/MAX8864 series except for the BP pin - which is unused on those parts. It shares identical IN, GND, OUT, and SHDN pin assignments in the SOT23-5 thin package. This allows drop-in replacement in existing layouts when upgrading to lower noise and improved protection features of the MAX8867EZK50+T.
MAX8867EZK50+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):
- 5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.165V @ 150mA (Typ)
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- 180 µA
- Current - Supply (Max):
- 101 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
MAX8867EZK50+T FAQ
1.How can I place an order for MAX8867EZK50+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8867EZK50+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 MAX8867EZK50+T reliable?
The price and inventory of MAX8867EZK50+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8867EZK50+T is usually 5 days.
3.What payment methods are accepted for MAX8867EZK50+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8867EZK50+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8867EZK50+T?
MAX8867EZK50+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8867EZK50+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 MAX8867EZK50+T?
For technical support, including MAX8867EZK50+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8867EZK50+T requirements.
6.How does Aetrix verify that MAX8867EZK50+T is sourced from the original manufacturer or authorized distributors?
All MAX8867EZK50+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 MAX8867EZK50+T meets industry standards.
7.What is the process for return or replacement of MAX8867EZK50+T?
All MAX8867EZK50+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX8867EZK50+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 MAX8867EZK50+T part is unused and in its original packaging.
Return procedure for MAX8867EZK50+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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