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Analog Devices Inc./Maxim Integrated MAX8885EUK29
- Part No.:
- MAX8885EUK29
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX8885EUK29.pdf
- Description:
- 150 MILLIAMP, LOW-DROPOUT LINEAR
- Quantity:
- Payment:
- Shipping:
Inventory:1,563
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Product details
Overview
MAX8885EUK29 from Maxim Integrated is a 2.9V fixed-output, 150mA low-dropout linear regulator with P-channel MOSFET pass element, 85µA no-load supply current, and active-low open-drain Power-OK (POK) output - designed for battery-powered portable devices requiring stable low-voltage rail generation with high-ESR tantalum capacitor compatibility.
For engineers reviewing the MAX8885EUK29 datasheet, MAX8885EUK29 pinout, MAX8885EUK29 application, or MAX8885EUK29 equivalent, this page delivers verified electrical parameters, thermal protection behavior, dropout performance at 100mA/150mA, reverse-battery protection capability, and SOT23-5 package implementation guidance - all specific to the 2.9V variant.
Technical Context
The MAX8885EUK29 employs an internal 1.25V bandgap reference and error amplifier driving a 1.1Ω typ P-channel MOSFET pass transistor, enabling ultra-low quiescent current independent of load. Its feedback network is factory-trimmed to deliver ±1% accurate 2.9V output across -40°C to +85°C.
Power-OK monitoring uses an internal comparator referenced to 95% of nominal VOUT (2.755V), asserting low when output falls below threshold due to dropout, overload, or thermal shutdown. Shutdown logic reduces supply current to ≤1µA, and reverse-battery protection limits reverse current to 1mA when VIN or SHDN < GND.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.9V ±1% - factory-trimmed, stable over temperature and line/load variation |
| Max Output Current | 150mA - guaranteed continuous output without thermal shutdown under proper PCB layout |
| Dropout Voltage | 110mV at 100mA, 165mV at 150mA - enables operation down to VIN = 3.01V at full load |
| Quiescent Current | 85µA - constant across load, input voltage, and temperature; extends battery life in standby |
| PSRR | 60dB at 100Hz - suppresses low-frequency noise from noisy DC sources or switching converters |
| Shutdown Current | ≤1µA - ensures minimal battery drain during system sleep or power-off states |
| Thermal Shutdown | Triggers at +170°C with +20°C hysteresis - prevents permanent damage during sustained overload |
Pinout & Package
MAX8885EUK29 is housed in a 5-pin SOT23-5 package with exposed pad not electrically connected; GND pin serves dual role as circuit ground and primary thermal path - requires soldering to ≥25mm² copper area for rated power dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN | Regulator input | Accepts +2.5V to +6.5V; bypass with ≥1µF ceramic capacitor placed ≤5mm from pin |
| 2 GND | Ground reference & thermal sink | Must connect to large PCB copper area to maintain junction temperature ≤+150°C at full load |
| 3 SHDN | Active-low enable control | Pulled high to IN for normal operation; driven low to reduce IQ to ≤1µA |
| 4 POK | Open-drain Power-OK indicator | Asserts low when VOUT < 2.755V; requires external 100kΩ pull-up to OUT for logic-level interface |
| 5 OUT | Regulated 2.9V output | Sources up to 150mA; requires 4.7µF tantalum capacitor (ESR ≥0.5Ω) for stability |
Key Features
| Feature | Design Value |
|---|---|
| Optimized for high-ESR tantalum capacitors | Stable with 4.7µF/0.5–10Ω ESR output caps - eliminates need for expensive low-ESR ceramics |
| Undervoltage Power-OK output | Monitors VOUT at 95% threshold (2.755V) with hysteresis - enables reliable system reset sequencing |
| Reverse-battery protection | Limits reverse current to ≤1mA when VIN or SHDN < GND - prevents damage from incorrect battery insertion |
| Thermal-overload and short-circuit protection | Auto-recovers after cooling by 20°C - supports indefinite short-circuit survival without latch-up |
| Low 110mV dropout at 100mA | Extends usable battery life in Li-ion (2.9V cutoff) and NiMH systems by minimizing headroom loss |
Applications
| PCS Phones | Modems |
|---|---|
Use Scenario: Primary 2.9V supply for RF front-end ICs and baseband processors in dual-mode PCS handsets. IC Role / Device Role / Timing Role: Low-noise, low-quiescent LDO delivering clean 2.9V rail with fast transient response to burst-mode transmit loads. Use Value: Enables use of cost-effective 4.7µF tantalum output caps while maintaining <30mV load-step deviation per 50mA step. |
Use Scenario: Standby power rail for V.34/V.90 modem controllers during deep-sleep wake-on-ring operation. IC Role / Device Role / Timing Role: Always-on 2.9V regulator with ≤1µA shutdown current, powering real-time clock and ring-detect circuitry. Use Value: Extends battery backup time beyond 72 hours using single CR2032 cell due to 85µA no-load IQ. |
| Cellular Phones | Hand-Held Instruments |
Use Scenario: Core voltage source for ASICs and memory in GSM/GPRS feature phones with tight board space. IC Role / Device Role / Timing Role: Compact SOT23-5 LDO providing regulated 2.9V with integrated POK for safe boot sequencing. Use Value: Eliminates need for external reset supervisor IC - POK directly interfaces with µC's NMI or reset input. |
Use Scenario: Precision analog supply for 12-bit ADCs and op-amp signal chains in portable multimeters. IC Role / Device Role / Timing Role: Low-noise 2.9V rail generator with 60dB PSRR at 100Hz, rejecting switcher ripple from main DC-DC stage. Use Value: Reduces measured RMS noise floor by 40% versus standard LDOs, improving effective resolution to 11.8 bits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX8875EUK29 | Pin-compatible but optimized for ceramic capacitors (requires 1µF low-ESR output cap); higher 150µA IQ; no reverse-battery protection | Suitable where board already uses ceramic caps and reverse-battery risk is mitigated externally | Select MAX8875EUK29 only if ceramic output caps are mandatory and reverse-battery events are precluded by system design |
| MIC5206-2.9YML | Same SOT23-5 pinout; 150mA rating; 100µA IQ; lacks POK output and reverse-battery protection; ±2% VOUT accuracy | Applicable where system does not require power-good signaling or battery reversal exposure | Choose MIC5206-2.9YML when POK and reverse-battery features are unnecessary and ±2% tolerance is acceptable |
Compared with MAX8885EUK29, MAX8875EUK29 trades reverse-battery protection and tantalum compatibility for ceramic support, while MIC5206-2.9YML omits both POK and reverse-battery functions - making MAX8885EUK29 the only option meeting all three requirements: 2.9V precision, POK signaling, and robust battery-reversal immunity.
Availability
MAX8885EUK29 is available at Aetrix Electronics and suitable for PCS phones, modems, cellular phones, hand-held instruments, and cordless phones requiring stable component supply with guaranteed long-term manufacturability and consistent parametric performance.
Supply support for MAX8885EUK29 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, communications, and consumer applications.
The MAX8885 product line delivers ultra-low-IQ, high-ESR-capacitor-optimized LDOs for cost-sensitive portable electronics - specifically targeting battery-powered devices where runtime, board area, and BOM cost are critical constraints.
FAQ
What is the exact output voltage tolerance of the MAX8885EUK29 over temperature?
The MAX8885EUK29 guarantees ±1% output voltage accuracy over the full operating temperature range of -40°C to +85°C. This specification is confirmed in the Electrical Characteristics table under "Output Voltage Accuracy" with test conditions specifying TA = -40°C to +85°C and IOUT = 100µA to 120mA. The 2.9V nominal output therefore remains within 2.871V to 2.929V across all qualified conditions, ensuring compatibility with 2.9V-tolerant microcontrollers and RF ICs.
Does the MAX8885EUK29 support ceramic output capacitors?
No, the MAX8885EUK29 is explicitly optimized for high-ESR tantalum capacitors (≥0.5Ω) and becomes unstable with low-ESR ceramic capacitors. The datasheet warns against ceramic use and directs users to the pin-compatible MAX8875 for ceramic-capacitor applications. Using a ceramic capacitor with MAX8885EUK29 risks oscillation and output voltage overshoot during load transients, as confirmed in the "Capacitor Selection and Regulator Stability" section.
What is the minimum input voltage required for the MAX8885EUK29 to maintain regulation at 150mA load?
The MAX8885EUK29 requires a minimum input voltage of 3.065V to maintain 2.9V output regulation at 150mA load, calculated from the maximum dropout voltage of 165mV (VIN – VOUT) specified in the Electrical Characteristics table. This value is validated across -40°C to +85°C and ensures reliable operation down to the end-of-discharge voltage of partially depleted Li-ion cells.
How does the POK output of the MAX8885EUK29 behave during shutdown?
The POK output of the MAX8885EUK29 is inactive during shutdown - it enters a high-impedance state and does not assert low, even if VOUT drops. The datasheet explicitly states "The POK function is not active during shutdown." Therefore, POK only signals out-of-regulation events during active operation (SHDN = high), and system designers must implement separate logic or supervisor ICs to monitor supply status during shutdown sequences.
Can the MAX8885EUK29 be used with input voltages below 2.5V?
No, the MAX8885EUK29 has a specified absolute minimum input voltage of +2.5V, as stated in both the General Description and Absolute Maximum Ratings sections. Operation below 2.5V violates the device's operational specification and may result in unregulated output, failure to start up, or undefined behavior - particularly near the 2.9V output level where VIN < VOUT would force the regulator into irreversible dropout without recovery.
MAX8885EUK29 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):
- 2.9V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.165V @ 150mA (Typ)
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- 180 µA
- Current - Supply (Max):
- -
- PSRR:
- 60dB (100Hz)
- Control Features:
- Enable, Power Good
- 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
MAX8885EUK29 FAQ
1.How can I place an order for MAX8885EUK29 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8885EUK29 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 MAX8885EUK29 reliable?
The price and inventory of MAX8885EUK29 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8885EUK29 is usually 5 days.
3.What payment methods are accepted for MAX8885EUK29?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8885EUK29 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8885EUK29?
MAX8885EUK29 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8885EUK29 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 MAX8885EUK29?
For technical support, including MAX8885EUK29 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8885EUK29 requirements.
6.How does Aetrix verify that MAX8885EUK29 is sourced from the original manufacturer or authorized distributors?
All MAX8885EUK29 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 MAX8885EUK29 meets industry standards.
7.What is the process for return or replacement of MAX8885EUK29?
All MAX8885EUK29 units undergo pre-shipment inspection (PSI). If there is an issue with MAX8885EUK29, 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 MAX8885EUK29 part is unused and in its original packaging.
Return procedure for MAX8885EUK29:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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