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Analog Devices Inc./Maxim Integrated MAX8885EUK33+T
- Part No.:
- MAX8885EUK33+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX8885EUK33+T.pdf
- Description:
- IC REG LINEAR 3.3V 150MA SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
The MAX8885EUK33+T from Maxim Integrated is a 3.3V fixed-output, 150mA low-dropout linear regulator featuring a P-channel MOSFET pass device, 85µA no-load supply current, and an active-low open-drain power-OK (POK) output. It operates from +2.5V to +6.5V input, delivers ±1% output voltage accuracy, and is optimized for use with low-cost, high-ESR tantalum capacitors in space-constrained portable power rails.
For engineers reviewing the MAX8885EUK33+T datasheet, MAX8885EUK33+T pinout, MAX8885EUK33+T application, or MAX8885EUK33+T equivalent, key selection criteria include dropout performance at 150mA (165mV), thermal shutdown behavior (+170°C trip), reverse-battery protection, PSRR of 60dB at 100Hz, and compatibility with 4.7µF tantalum output capacitors (≥0.5Ω ESR).
Technical Context
The MAX8885EUK33+T implements a bandgap-referenced error amplifier controlling a 1.1Ω typical P-channel MOSFET pass transistor, enabling ultra-low quiescent current independent of load. Its internal feedback divider fixes VOUT at 3.3V with ±1% tolerance across –40°C to +85°C.
Power-OK monitoring uses an internal comparator referenced to 95% of nominal VOUT (3.135V), asserting low when output falls out of regulation 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 falls below GND.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3V ±1% over –40°C to +85°C - ensures stable core/logic rail without external resistors. |
| Max Output Current | 150mA guaranteed - supports moderate-power microcontrollers, RF front-ends, or sensor interfaces. |
| Dropout Voltage | 165mV at 150mA load - enables operation down to VIN = 3.465V, extending battery life in single-cell Li-ion or multi-cell alkaline systems. |
| No-Load Supply Current | 85µA - minimizes standby drain in always-on subsystems such as real-time clocks or wake-up monitors. |
| PSRR | 60dB at 100Hz - suppresses low-frequency ripple from switching converters or noisy battery sources. |
| POK Threshold | 95% of VOUT (3.135V) with hysteresis - provides reliable undervoltage detection for system reset sequencing. |
| Shutdown Current | ≤1µA max - enables deep-sleep modes in portable devices without compromising battery shelf life. |
Pinout & Package
MAX8885EUK33+T is housed in a 5-pin SOT23-5 package (JEDEC MO-178AA), with exposed pad not electrically connected. The GND pin serves dual roles: circuit reference and thermal path - requires soldering to ≥25 mm² 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 pad | Electrical return and primary heat sink; must connect to large PCB ground plane for thermal reliability. |
| 3 SHDN | Active-low enable control | Pull low to disable regulator (IQ ≤1µA); tie to IN for always-on operation. |
| 4 POK | Open-drain power-OK indicator | Asserts low when VOUT < 3.135V; requires external 100kΩ pull-up to OUT for logic-level interface. |
| 5 OUT | Regulated 3.3V output | Sources up to 150mA; requires 4.7µF tantalum capacitor (ESR ≥0.5Ω) for stability - ceramic caps not supported. |
Key Features
| Feature | Design Value |
|---|---|
| P-channel MOSFET pass element | Eliminates base-drive current loss, enabling 85µA IQ across all load conditions including dropout. |
| Optimized for high-ESR tantalum capacitors | Stable with 4.7µF/0.5Ω–10Ω ESR output caps - avoids cost and size penalty of low-ESR ceramics or polymer types. |
| Reverse-battery protection | Clamps reverse current to ≤1mA if VIN or SHDN goes below GND - prevents damage during battery insertion errors. |
| Thermal shutdown with hysteresis | Turns off at +170°C; re-enables after 20°C cooldown - provides self-recovering fault protection without external circuitry. |
| Undervoltage POK output | Monitors VOUT continuously; asserts within 10ms of dropout onset - enables deterministic system reset before brownout. |
Applications
| PCS Phones | Cellular Phones |
|---|---|
Use Scenario: Powering baseband processor I/O banks and RF transceiver bias rails in dual-mode PCS handsets. IC Role / Device Role / Timing Role: Primary 3.3V LDO delivering clean, regulated voltage to noise-sensitive analog sections. Use Value: 60dB PSRR at 100Hz rejects switching noise from PMIC DC-DC converters; POK signal triggers safe state save before battery depletion. |
Use Scenario: Supplying application processor core logic and camera interface circuits in GSM/UMTS smartphones. IC Role / Device Role / Timing Role: Secondary LDO for non-critical 3.3V domains requiring low quiescent current and small footprint. Use Value: 85µA no-load IQ extends standby time; SOT23-5 package fits tight board areas near display connectors or SIM slots. |
| Hand-Held Instruments | PCMCIA Cards |
Use Scenario: Regulating power for precision ADC front-ends and LCD controller logic in portable multimeters and data loggers. IC Role / Device Role / Timing Role: Low-noise 3.3V source ensuring accurate analog measurements and stable digital timing. Use Value: 170µVRMS integrated output noise (10Hz–100kHz) avoids signal corruption; ±1% VOUT accuracy maintains calibration integrity. |
Use Scenario: Providing isolated 3.3V power to PC Card peripherals such as CompactFlash adapters or wireless modems. IC Role / Device Role / Timing Role: Hot-swap capable LDO with reverse-battery protection and fast POK assertion. Use Value: Reverse-battery protection prevents damage during card insertion/removal; POK enables host-side card presence detection and initialization sequencing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX8875EUK33+T | Pin-compatible but optimized for ceramic output capacitors (min 1µF, ESR < 0.1Ω); higher 120µA IQ; no reverse-battery protection. | Required where ceramic caps are mandated for size, cost, or lifetime reasons - e.g., high-reliability industrial modules. | Select MAX8875EUK33+T only when using ceramic output caps; MAX8885EUK33+T remains preferred for tantalum-based cost-sensitive designs. |
| MIC5206-3.3YM5-TR | Pin-compatible per datasheet; 150mA rating; 100µA IQ; lacks POK output and reverse-battery protection; requires 2.2µF ceramic cap. | Suitable for simpler systems without power-good monitoring or battery reversal risk - e.g., basic embedded controllers. | Choose MIC5206-3.3YM5-TR when POK and reverse protection are unnecessary; MAX8885EUK33+T adds critical safety and sequencing features. |
Compared with MAX8875EUK33+T and MIC5206-3.3YM5-TR, the MAX8885EUK33+T uniquely combines POK signaling, reverse-battery protection, and stable operation with high-ESR tantalum capacitors - making it the optimal choice for cost-driven, battery-powered portable equipment where reliability under misuse and component cost are primary constraints.
Availability
MAX8885EUK33+T is available at Aetrix Electronics and suitable for PCS phones, cellular handsets, hand-held instruments, and PCMCIA cards requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for MAX8885EUK33+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 MAX8885 series was designed specifically for battery-powered portable electronics needing ultra-low IQ, robust fault protection, and compatibility with low-cost tantalum capacitors - addressing cost, size, and reliability trade-offs in high-volume mobile devices.
FAQ
What is the maximum input voltage rating for the MAX8885EUK33+T?
The MAX8885EUK33+T has an absolute maximum input voltage of +7V, but its specified operating range is +2.5V to +6.5V. Exceeding +6.5V may cause functional instability or reduced reliability, even if within absolute ratings. For sustained operation, VIN should remain within the 2.5V–6.5V window, especially under load or elevated temperature.
Does the MAX8885EUK33+T support ceramic output capacitors?
No, the MAX8885EUK33+T is explicitly designed for high-ESR tantalum capacitors (≥0.5Ω) and becomes unstable with low-ESR ceramic capacitors. Using ceramic output caps can cause oscillation or poor transient response. For ceramic-capable alternatives, refer to the pin-compatible MAX8875EUK33+T, which specifies 1µF ceramic minimum with ESR < 0.1Ω.
How does the POK output of the MAX8885EUK33+T behave during shutdown?
The POK output of the MAX8885EUK33+T is inactive during shutdown - it neither asserts nor de-asserts and presents high-impedance. POK only monitors regulation status when the device is enabled (SHDN = high). To ensure valid POK signaling, keep SHDN asserted and rely on POK's 95% VOUT threshold (3.135V) and built-in hysteresis for clean reset generation.
What is the thermal shutdown trip point and hysteresis of the MAX8885EUK33+T?
The MAX8885EUK33+T triggers thermal shutdown at +170°C junction temperature and re-enables after cooling by 20°C (hysteresis = 20°C). This results in pulsed output under continuous overload. The device is rated for continuous operation up to +150°C junction temperature; sustained operation above this limit risks accelerated aging or failure.
Can the MAX8885EUK33+T be used with input voltages below 2.5V?
No - the MAX8885EUK33+T requires a minimum input voltage of +2.5V to maintain regulation. At VIN < 2.5V, the device cannot sustain 3.3V output and enters dropout. Its lowest functional VIN is defined by VOUT + VDROPOUT; at 150mA, this is 3.3V + 0.165V = 3.465V. Operation below 2.5V is outside specification and not characterized.
MAX8885EUK33+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 6.5V
- Voltage - Output (Min/Fixed):
- 3.3V
- 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
MAX8885EUK33+T FAQ
1.How can I place an order for MAX8885EUK33+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8885EUK33+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 MAX8885EUK33+T reliable?
The price and inventory of MAX8885EUK33+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8885EUK33+T is usually 5 days.
3.What payment methods are accepted for MAX8885EUK33+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8885EUK33+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8885EUK33+T?
MAX8885EUK33+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8885EUK33+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 MAX8885EUK33+T?
For technical support, including MAX8885EUK33+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8885EUK33+T requirements.
6.How does Aetrix verify that MAX8885EUK33+T is sourced from the original manufacturer or authorized distributors?
All MAX8885EUK33+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 MAX8885EUK33+T meets industry standards.
7.What is the process for return or replacement of MAX8885EUK33+T?
All MAX8885EUK33+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX8885EUK33+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 MAX8885EUK33+T part is unused and in its original packaging.
Return procedure for MAX8885EUK33+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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