My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX8885EUK33
- Part No.:
- MAX8885EUK33
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX8885EUK33.pdf
- Description:
- IC REG LINEAR LDO
- Quantity:
- Payment:
- Shipping:
Inventory:1,315
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX8885EUK33 from Maxim Integrated is a 3.3V 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. It operates from +2.5V to +6.5V input, delivers ±1% output accuracy over temperature, and is optimized for stable operation with low-cost, high-ESR tantalum capacitors in portable battery-powered systems.
For engineers reviewing the MAX8885EUK33 datasheet, MAX8885EUK33 pinout, MAX8885EUK33 application, or MAX8885EUK33 equivalent, key selection considerations include dropout voltage at 150mA (165mV), thermal shutdown at +170°C, reverse-battery protection, 1µA max shutdown current, and compatibility with 4.7µF tantalum output capacitors (ESR > 0.5Ω).
Technical Context
The MAX8885EUK33 implements a bandgap-referenced error amplifier driving a 1.1Ω typical P-channel MOSFET pass transistor, enabling ultra-low quiescent current independent of load. Its internal feedback divider sets the fixed 3.3V output, eliminating external resistor networks.
Power-OK monitoring uses an internal comparator referenced to 95% of nominal VOUT (3.135V threshold), with hysteresis and open-drain output requiring external pull-up. Thermal protection activates at +170°C junction temperature with +20°C hysteresis, and reverse-battery circuitry 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 or I/O rail without external feedback components. |
| Max Output Current | 150mA guaranteed - supports moderate-power microcontrollers, RF front-ends, or sensor interfaces in compact portable designs. |
| Dropout Voltage | 165mV at 150mA load - enables operation down to VIN = 3.465V, extending usable battery life in single-cell Li-ion or multi-cell alkaline systems. |
| No-Load Supply Current | 85µA typical - minimizes standby power loss in always-on subsystems such as real-time clocks or wake-up monitors. |
| PSRR | 60dB at 100Hz - suppresses low-frequency ripple from noisy DC-DC converters or battery impedance variations. |
| Shutdown Current | 1µA maximum - allows deep-sleep modes with negligible battery drain during extended idle periods. |
| Power-OK Threshold | 95% of VOUT (3.135V) with hysteresis - provides reliable undervoltage detection for system reset or brown-out warning before functional failure. |
Pinout & Package
MAX8885EUK33 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 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 capacitor placed within 5mm to suppress input transients and improve PSRR. |
| 2 GND | Ground reference & thermal sink | Electrical return path and primary heat conduction route; must connect to large PCB copper area to maintain TJ ≤ +150°C at full load. |
| 3 SHDN | Active-low enable control | Logic low disables regulation and reduces IQ to ≤1µA; tie to IN for always-on operation; no pull-up required. |
| 4 POK | Open-drain Power-OK indicator | Asserts low when VOUT drops below 3.135V; requires external 100kΩ pull-up to OUT for logic-compatible signaling. |
| 5 OUT | Regulated 3.3V output | Sources up to 150mA; requires 4.7µF tantalum capacitor (ESR ≥ 0.5Ω) for stability - ceramic capacitors cause oscillation. |
Key Features
| Feature | Design Value |
|---|---|
| P-channel MOSFET pass element | Eliminates base-drive current, enabling 85µA quiescent current independent of load - critical for battery runtime in intermittent-use devices. |
| 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 while ensuring robustness across temperature and aging. |
| Reverse-battery protection | Clamps reverse current to ≤1mA if VIN or SHDN goes < 0V - prevents damage during incorrect battery insertion in consumer handhelds. |
| Thermal shutdown with hysteresis | Shuts down at +170°C and re-enables at +150°C - provides self-recovering fault protection during sustained overload without latch-up. |
| Undervoltage POK with hysteresis | Generates clean, glitch-free reset signal at 3.135V with built-in hysteresis - eliminates need for external supervisor IC in space-constrained designs. |
Applications
| Cellular Phone Subsystem | PCMCIA Card Power |
|---|---|
|
Use Scenario: Powering baseband processor I/O rails and SIM card interface in GSM/CDMA handsets with single-cell Li-ion battery (2.7V–4.2V). IC Role / Device Role / Timing Role: Primary 3.3V LDO delivering regulated supply to digital logic; POK signals host MCU when battery voltage approaches end-of-life. Use Value: 165mV dropout extends usable battery range to 3.465V input, while 85µA quiescent current preserves standby time between calls. |
Use Scenario: Providing isolated 3.3V supply to hot-pluggable PCMCIA memory or modem cards in laptops and industrial terminals. IC Role / Device Role / Timing Role: Local regulation with reverse-battery protection prevents card damage during misinsertion; POK confirms valid power before card enumeration. Use Value: Reverse-current limiting (<1mA) and thermal recovery enable safe hot-swap operation without system-level fusing or sequencing delays. |
| Hand-Held Instrument Front-End | Palmtop Computer Core Logic |
|
Use Scenario: Supplying precision analog front-end (AFE) and microcontroller peripherals in battery-operated multimeters or data loggers. IC Role / Device Role / Timing Role: Low-noise 3.3V source with 60dB PSRR at 100Hz - rejects switching noise from adjacent DC-DC converters feeding display or communication modules. Use Value: Stable 3.3V ±1% output ensures ADC reference integrity and digital logic timing margins across -40°C to +85°C operating range. |
Use Scenario: Powering ARM-based application processors and SRAM in palmtop PDAs with tight board space and thermal constraints. IC Role / Device Role / Timing Role: Compact SOT23-5 regulator with integrated thermal protection - eliminates need for external thermal sensors or discrete shutdown logic. Use Value: GND pin doubles as heatsink; direct soldering to 25mm² copper enables 150mA continuous operation without derating in sealed enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX8875EUK33 | Pin-compatible but optimized for ceramic output capacitors (requires COUT ≥ 1µF, ESR < 0.1Ω); higher 120µA quiescent current. | Used where board layout mandates ceramic caps for size or reliability; unsuitable with tantalum due to instability. | Select MAX8875EUK33 only if ceramic output capacitors are mandatory; otherwise MAX8885EUK33 offers lower IQ and proven tantalum compatibility. |
| MIC5206-3.3YM5 | Pin-compatible per datasheet; 150mA rating; 180µA quiescent current; no POK output; requires minimum 2.2µF ceramic output cap. | Lacks power-good signaling and reverse-battery protection; suited for cost-sensitive, non-critical rails without supervision needs. | Choose MIC5206-3.3YM5 only when POK, reverse-battery protection, and sub-100µA IQ are unnecessary - e.g., auxiliary analog supplies. |
Compared with MAX8875EUK33 and MIC5206-3.3YM5, the MAX8885EUK33 uniquely combines ultra-low 85µA quiescent current, integrated POK, reverse-battery protection, and guaranteed stability with high-ESR tantalum capacitors - making it optimal for cost-sensitive, battery-critical portable systems where reliability and runtime are prioritized over ceramic-capacitor flexibility.
Availability
MAX8885EUK33 is available at Aetrix Electronics and suitable for cellular phones, PCMCIA cards, hand-held instruments, and palmtop computers requiring stable component supply, long-term lifecycle support, and guaranteed parametric compliance across industrial temperature range.
Supply support for MAX8885EUK33 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 cost-sensitive, battery-powered portable equipment requiring ultra-low quiescent current, robust capacitor compatibility, and integrated power supervision - targeting PCS phones, modems, and handheld instrumentation.
FAQ
What is the output voltage tolerance and temperature drift of the MAX8885EUK33?
The MAX8885EUK33 delivers a fixed 3.3V output with ±1% initial accuracy over the full -40°C to +85°C operating range. This specification includes initial tolerance, line regulation, load regulation, and temperature coefficient effects - verified by production testing and SQC correlation. No external trimming or calibration is required for compliant operation.
Can the MAX8885EUK33 be used with ceramic output capacitors?
No - the MAX8885EUK33 is explicitly designed for stable operation with high-ESR tantalum capacitors (≥0.5Ω). Using ceramic capacitors (typically <0.1Ω ESR) causes phase-margin degradation and sustained oscillation, as confirmed in the "Capacitor Selection" section of the datasheet. For ceramic-capacitor compatibility, use the pin-compatible MAX8875EUK33 instead.
What is the minimum input voltage required for regulation at full 150mA load?
The MAX8885EUK33 requires a minimum input voltage of 3.465V to maintain 3.3V output regulation at 150mA load, based on its guaranteed 165mV dropout voltage. Below this, the device enters dropout mode and VOUT declines linearly with VIN. This value is validated across temperature and process corners per Absolute Maximum and Electrical Characteristics tables.
How does the POK output behave during shutdown?
The POK output of the MAX8885EUK33 is inactive during shutdown - it remains in high-impedance (open-drain floating) state when SHDN is pulled low. POK only asserts low when the regulator is enabled (SHDN = high) and VOUT falls below 95% of nominal (3.135V), such as during input undervoltage, overload, or thermal shutdown. This behavior is defined in the Pin Description and Detailed Description sections.
Is reverse-battery protection active on both IN and SHDN pins?
Yes - the MAX8885EUK33 provides reverse-battery protection on both IN and SHDN pins. If either pin falls below GND, internal circuitry disconnects parasitic paths and limits reverse current to ≤1mA, preventing damage during incorrect battery installation. This dual-pin protection is explicitly documented in the Applications Information section and Absolute Maximum Ratings table.
MAX8885EUK33 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):
- 3.3V
- 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 FAQ
1.How can I place an order for MAX8885EUK33 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8885EUK33 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 reliable?
The price and inventory of MAX8885EUK33 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8885EUK33 is usually 5 days.
3.What payment methods are accepted for MAX8885EUK33?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8885EUK33 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8885EUK33?
MAX8885EUK33 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8885EUK33 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?
For technical support, including MAX8885EUK33 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8885EUK33 requirements.
6.How does Aetrix verify that MAX8885EUK33 is sourced from the original manufacturer or authorized distributors?
All MAX8885EUK33 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 meets industry standards.
7.What is the process for return or replacement of MAX8885EUK33?
All MAX8885EUK33 units undergo pre-shipment inspection (PSI). If there is an issue with MAX8885EUK33, 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 part is unused and in its original packaging.
Return procedure for MAX8885EUK33:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX8885EUK33 Tags
-
MIC5504-1.8YM5-TR
Microchip Technology
-
MIC5504-3.3YM5-TR
Microchip Technology
-
MIC5365-3.0YC5-TR
Microchip Technology
-
MIC5365-1.8YC5-TR
Microchip Technology
-
MIC5365-2.5YC5-TR
Microchip Technology
-
MIC5365-3.3YC5-TR
Microchip Technology
-
MIC5365-3.3YD5-TR
Microchip Technology
-
MIC5317-3.3YM5-TR
Microchip Technology
-
TLV1117LV33DCYR
Texas Instruments
-
MIC5317-3.3YMT-TZ
Microchip Technology
-
MIC5528-3.3YMT-TR
Microchip Technology
-
TLV75801PDRVR
Texas Instruments
Tech Hub
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
