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Analog Devices Inc./Maxim Integrated MAX8867EUK32+T
- Part No.:
- MAX8867EUK32+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX8867EUK32+T.pdf
- Description:
- IC REG LIN 3.15V 150MA SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,417
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Product details
Overview
The MAX8867EUK32+T from Maxim Integrated is a low-noise, low-dropout linear regulator with a factory-preset 3.15V output, 150mA maximum load capability, 30µVRMS output noise, and 165mV dropout at full load-designed for battery-powered portable electronics requiring stable, quiet voltage regulation.
For engineers reviewing the MAX8867EUK32+T datasheet, MAX8867EUK32+T pinout, MAX8867EUK32+T application, or MAX8867EUK32+T equivalent, key selection criteria include its SOT23-5 package, 10nA shutdown current, reverse battery protection, thermal shutdown behavior, and BP-capacitor–dependent noise performance.
Technical Context
The MAX8867EUK32+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.
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; this configuration delivers 30µVRMS output noise (10Hz–100kHz) and enables stable operation with 1µF–10µF output capacitors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.15V ±1.4% - factory-trimmed, fixed, eliminates external feedback network |
| Max Output Current | 150mA - supports moderate-power RF, analog, and logic blocks in portable systems |
| Dropout Voltage | 165mV at 150mA - enables operation down to VIN = 3.315V, extending battery runtime |
| Output Noise | 30µVRMS (10Hz–100kHz) - suitable for noise-sensitive analog circuits (e.g., ADC references, VCOs) |
| Quiescent Current | 100µA - constant across load and dropout, critical for standby power budgeting |
| Shutdown Current | 10nA - enables ultra-low-power sleep modes without external discharge circuitry |
| Input Voltage Range | 2.5V to 6.5V - compatible with single Li-ion, multi-cell alkaline, and regulated intermediate rails |
Pinout & Package
SOT23-5 regular package (JEDEC MO-178AA), 5-pin surface-mount with GND acting as thermal pad; requires soldering to large copper area for thermal management.
| 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 (MAX8868 feature only) |
| 2 - GND | Ground reference and thermal path | Electrical return and primary heat dissipation path; must connect to large PCB ground plane |
| 3 - IN | Input voltage supply | Accepts 2.5V–6.5V; requires ≥1µF bypass capacitor to suppress supply noise and ensure stability |
| 4 - OUT | Regulated output | Delivers up to 150mA at 3.15V; requires 1µF–10µF output capacitor with ESR <0.2Ω for stability |
| 5 - BP | Noise-reduction bypass node | Connects to 0.01µF ceramic capacitor to reduce output noise; determines startup time and PSRR roll-off |
Key Features
| Feature | Design Value |
|---|---|
| Reverse Battery Protection | Limits reverse current to ≤1mA when VIN or SHDN falls below GND-prevents damage during incorrect battery insertion |
| Thermal Shutdown | Activates at +170°C junction temperature with +20°C hysteresis-enables pulsed safe operation under sustained overload |
| Current Limit | 160mA minimum to 500mA maximum-protects against short-circuit while allowing transient peaks above 150mA |
| P-Channel Pass Transistor | 1.1Ω typical RDS(ON)-eliminates base-drive loss, enabling constant 100µA IQ regardless of load or dropout condition |
| BP Pin Noise Filtering | Internal 200kΩ resistor + external 0.01µF forms 80Hz LPF-reduces broadband noise without compromising transient response |
Applications
| Cellular Handsets | PCMCIA Cards |
|---|---|
Use Scenario: Powering RF transceiver bias circuits and baseband analog sections in GSM/CDMA handsets. IC Role / Device Role / Timing Role: Primary 3.15V LDO supplying noise-sensitive VCO and ADC reference rails. Use Value: 30µVRMS noise and 165mV dropout extend talk time and maintain signal integrity under fading battery voltage. | Use Scenario: Providing clean, regulated 3.15V to interface logic and flash memory on hot-pluggable PCMCIA cards. IC Role / Device Role / Timing Role: Local point-of-load regulator isolating card circuitry from noisy host bus power. Use Value: Reverse battery protection prevents damage during misinsertion; 10nA shutdown enables zero-power card ejection detection. |
| Palmtop Computers | Electronic Planners |
Use Scenario: Supplying core logic and touchscreen controller in battery-operated palmtops with tight thermal constraints. IC Role / Device Role / Timing Role: Main system LDO delivering 3.15V to microcontroller I/O and peripheral interfaces. Use Value: GND-pin thermal conduction and 100µA IQ minimize self-heating and maximize battery life between sync sessions. | Use Scenario: Regulating power to real-time clock (RTC), SRAM backup, and LCD driver in compact planners. IC Role / Device Role / Timing Role: Low-quiescent, low-noise source for timekeeping and display subsystems. Use Value: 10nA shutdown current preserves coin-cell backup energy for >10 years; ±1.4% output accuracy ensures RTC timing stability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-noise LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX8867EUK33+T | 3.30V output (vs. 3.15V); identical pinout, noise, and quiescent current | Requires system-level voltage tolerance check for 3.30V vs. 3.15V logic or analog rails | Select only if target rail is specified at 3.30V; otherwise, MAX8867EUK32+T provides tighter fit for 3.15V–3.2V systems |
| MCP1700T-315I/TT | 3.15V output, 250mA rating, 6µA IQ, but higher 120µVRMS noise and no reverse battery protection | Lacks reverse polarity protection and exhibits 4× higher output noise-unsuitable for RF/analog precision rails | Consider only for cost-sensitive, non-battery-reverse-prone digital-only applications where noise <50µVRMS is acceptable |
Compared with MAX8867EUK33+T, the MAX8867EUK32+T offers exact 3.15V regulation for legacy or calibrated subsystems; versus MCP1700T-315I/TT, it delivers superior noise performance and integrated reverse-battery safety at the cost of higher quiescent current.
Availability
MAX8867EUK32+T is available at Aetrix Electronics and suitable for cellular handsets, PCMCIA cards, palmtop computers, and electronic planners requiring stable component supply with guaranteed long-term lifecycle support.
Supply support for MAX8867EUK32+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 industrial, communications, and consumer applications.
The MAX8867/MAX8868 product line was engineered specifically for battery-powered portable electronics requiring ultra-low noise, low dropout, and robust fault protection-including reverse battery, thermal, and short-circuit resilience.
FAQ
What is the output voltage tolerance of the MAX8867EUK32+T over temperature and load?
The MAX8867EUK32+T has a guaranteed output voltage accuracy of ±1.4% over the full -40°C to +85°C operating temperature range and 0mA to 150mA load current. Typical output voltage drift versus temperature is less than ±0.5% across that range, as confirmed by Figure MAX8867/8-07 in the datasheet showing stable 3.15V output from -40°C to +100°C at 50mA load. This specification applies directly to the MAX8867EUK32+T and is verified per production test limits.
Does the MAX8867EUK32+T include auto-discharge functionality during shutdown?
No, the MAX8867EUK32+T does not include auto-discharge functionality. That feature is exclusive to the MAX8868 family (e.g., MAX8868EUK32+T). When the MAX8867EUK32+T is placed in shutdown (SHDN = low), the output remains floating at its last regulated voltage; external circuitry is required to discharge the output if needed. This distinction is explicitly stated in the General Description and Pin Description sections of the MAX8867/MAX8868 datasheet.
What capacitor values are recommended for stable operation of the MAX8867EUK32+T?
For stable operation, the MAX8867EUK32+T requires a minimum 1µF ceramic input capacitor (X7R/X5R dielectric) and a 1µF–10µF ceramic output capacitor with ESR <0.2Ω. The BP pin requires a 0.01µF ceramic capacitor for optimal noise performance. Larger output capacitance improves load-transient response and PSRR but increases startup time; values above 0.1µF on BP are not recommended due to excessive delay in shutdown exit, as shown in Figures MAX8867-21 and MAX8867-23.
Can the MAX8867EUK32+T operate from a 2.5V input when regulating to 3.15V?
No, the MAX8867EUK32+T cannot regulate to 3.15V from a 2.5V input because the minimum input voltage must exceed the output voltage by the dropout voltage. At 150mA load, dropout is 165mV, so minimum VIN = 3.15V + 0.165V = 3.315V. The 2.5V–6.5V input range specifies absolute ratings-not functional regulation range-and the device enters dropout or fails to regulate below ~3.315V at full load. This is defined in the Absolute Maximum Ratings and Electrical Characteristics tables.
Is the MAX8867EUK32+T pin-compatible with the MAX8863 series?
Yes, the MAX8867EUK32+T is pin-compatible with the MAX8863 series except for the BP pin. As stated in the General Description, "The MAX8867 and MAX8868 are pin-compatible with the MAX8863 and MAX8864, except for the BP pin." The MAX8863 lacks the BP pin and associated noise-reduction circuitry, so direct substitution requires verifying whether the BP function is required in the target design and confirming layout compatibility for the 5-pin SOT23 footprint.
MAX8867EUK32+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):
- 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:
- SOT-23-5
MAX8867EUK32+T FAQ
1.How can I place an order for MAX8867EUK32+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8867EUK32+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 MAX8867EUK32+T reliable?
The price and inventory of MAX8867EUK32+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8867EUK32+T is usually 5 days.
3.What payment methods are accepted for MAX8867EUK32+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8867EUK32+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8867EUK32+T?
MAX8867EUK32+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8867EUK32+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 MAX8867EUK32+T?
For technical support, including MAX8867EUK32+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8867EUK32+T requirements.
6.How does Aetrix verify that MAX8867EUK32+T is sourced from the original manufacturer or authorized distributors?
All MAX8867EUK32+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 MAX8867EUK32+T meets industry standards.
7.What is the process for return or replacement of MAX8867EUK32+T?
All MAX8867EUK32+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX8867EUK32+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 MAX8867EUK32+T part is unused and in its original packaging.
Return procedure for MAX8867EUK32+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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