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Analog Devices Inc./Maxim Integrated MAX8887EZK33-T
- Part No.:
- MAX8887EZK33-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
MAX8887EZK33-T.pdf
- Description:
- IC REG LINEAR LDO
- Quantity:
- Payment:
- Shipping:
Inventory:1,631
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Product details
Overview
MAX8887EZK33-T from Maxim Integrated is a low-noise, 3.3V fixed-output, 300mA low-dropout linear regulator with 100mV dropout at 200mA, 55µA no-load supply current, and 42µVRMS output noise - designed for power-sensitive portable electronics including cellular phones, PDAs, and notebook computers.
For engineers reviewing the MAX8887EZK33-T datasheet, MAX8887EZK33-T pinout, MAX8887EZK33-T application, or MAX8887EZK33-T equivalent, this page delivers verified electrical parameters, SOT23-5 pin mapping, thermal and short-circuit protection behavior, and validated alternative regulators for battery-powered LDO selection.
Technical Context
The MAX8887EZK33-T uses an internal PMOS pass transistor (RDS(ON) ≈ 0.5Ω) to achieve load-independent 55µA quiescent current and 100mV dropout at 200mA - eliminating base-drive losses inherent in PNP-based LDOs. Its reference bypass (BP) pin enables noise filtering via a 0.01µF capacitor.
It operates across 2.5V–5.5V input range with ±2% output voltage accuracy over 0°C to +85°C, 60dB PSRR at 1kHz, and foldback current limiting that reduces trip threshold to 420mA when VOUT falls below 93% of nominal - ensuring safe operation during brownout or overload.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3V ±2% over temperature and load - ensures stable core/peripheral rail for 3.3V microcontrollers and I/O interfaces. |
| Max Continuous Output Current | 300mA guaranteed - supports moderate-power RF modules, display drivers, or sensor subsystems without thermal derating at +70°C. |
| Dropout Voltage | 100mV at 200mA load - extends usable battery life down to 3.4V input for Li-ion cells in final discharge phase. |
| Ground Pin Current | 55µA at no load, ≤100µA at 200mA - minimizes standby power loss in always-on subsystems like real-time clocks or wake-up logic. |
| Output Noise | 42µVRMS (10Hz–100kHz, with 0.01µF BP cap) - meets low-noise requirements for ADC references, audio codecs, and RF synthesizers. |
| PSRR | 60dB at 1kHz - suppresses switching noise from adjacent DC/DC converters feeding shared input rails. |
| Shutdown Current | 0.1µA max - enables deep-sleep modes in portable devices with multi-day battery retention. |
Pinout & Package
MAX8887EZK33-T is housed in a thin 5-pin SOT23 package (1mm height), RoHS-compliant, with standard land pattern per Maxim document 21-0113 (Z5-1).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - IN | Input supply connection | Accepts 2.5V–5.5V; requires 2.2µF ceramic bypass to GND for stability and transient response. |
| 2 - GND | Power ground reference | Low-impedance return path for regulator current and BP capacitor; must be connected directly to system ground plane. |
| 3 - SHDN | Active-low shutdown control | Pull low to reduce supply current to ≤0.1µA; driven high internally or externally to IN for normal operation. |
| 4 - BP | Reference bypass terminal | Connects to 0.01µF low-leakage ceramic capacitor to filter reference noise and achieve 42µVRMS output noise. |
| 5 - OUT | Regulated output | Delivers up to 300mA at 3.3V; requires 2.2µF ceramic capacitor (ESR < 0.1Ω) to GND for loop stability and load-step response. |
Key Features
| Feature | Design Value |
|---|---|
| Low-noise regulation | 42µVRMS output noise enabled by dedicated BP pin and external 0.01µF capacitor - critical for precision analog and RF circuits. |
| Ultra-low quiescent current | 55µA independent of load - preserves battery capacity in long-idle portable applications such as handheld medical instruments. |
| Thermal & short-circuit protection | Auto-shutdown at +170°C junction temperature with 20°C hysteresis; foldback current limiting prevents thermal runaway during sustained overload. |
| Precision output accuracy | ±2% over full load (100µA–300mA) and temperature (−40°C to +85°C) - eliminates need for post-regulation trimming in cost-sensitive designs. |
| Compact footprint | SOT23-5 package (1mm height) occupies <1.6mm² PCB area - ideal for space-constrained mobile and wearable PCB layouts. |
Applications
| Cellular Phone Power Management | Notebook Computer I/O Rail |
|---|---|
|
Use Scenario: Supplies 3.3V to baseband processor I/O, camera interface, and SIM card circuitry in GSM/UMTS handsets. IC Role / Device Role / Timing Role: Primary low-noise LDO delivering clean 3.3V rail with fast load-transient response to handle burst-mode transmission currents. Use Value: 100mV dropout extends talk time by enabling operation down to 3.4V battery voltage; 42µVRMS noise prevents bit errors in high-speed serial links. |
Use Scenario: Powers USB controller, SD card slot, and touchpad interface in ultraportable notebooks. IC Role / Device Role / Timing Role: Secondary LDO generating regulated 3.3V from main 5V or 3.3V system rail, with shutdown control synchronized to sleep states. Use Value: 0.1µA shutdown current minimizes overnight battery drain; ±2% accuracy ensures reliable USB enumeration and SD card initialization. |
| Handheld Medical Instrument | Digital Camera Sensor Bias |
|
Use Scenario: Provides stable 3.3V supply to low-power MCU, OLED display driver, and analog front-end in portable glucose meters. IC Role / Device Role / Timing Role: Always-on LDO maintaining RTC and sensor bias during standby, with thermal protection preventing overheating in enclosed plastic housings. Use Value: 55µA no-load current enables >1-year shelf life on coin-cell backup; 60dB PSRR rejects noise from nearby wireless transceivers. |
Use Scenario: Supplies 3.3V bias to CMOS image sensor analog block and ADC reference in compact digital cameras. IC Role / Device Role / Timing Role: Low-noise LDO decoupling sensor analog chain from noisy digital domain, with BP pin filtering reference voltage ripple. Use Value: 42µVRMS noise directly limits sensor SNR floor; 100mV dropout allows use of single-cell Li-ion without intermediate buck stage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-noise, 300mA LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS78233DRVT | Higher 250mV dropout at 200mA; 50µA IQ; no BP pin - relies on output capacitor for noise suppression. | Lacks dedicated noise-reduction path; less suitable for ultra-low-noise sensor/RF biasing. | Prefer where board space permits larger COUT and noise spec allows ≥100µVRMS. |
| MCP1700-3302E/TO | 150mV dropout at 250mA; 1.6µA IQ; no thermal shutdown or POK - simpler architecture, lower cost. | No foldback current limiting or thermal protection; limited to low-power, non-critical rails. | Select for cost-sensitive consumer accessories where reliability margins are relaxed and peak load ≤200mA. |
Compared with TPS78233DRVT and MCP1700-3302E/TO, the MAX8887EZK33-T uniquely combines ultra-low noise (42µVRMS), low dropout (100mV), and integrated thermal/short-circuit protection - making it optimal for high-integrity portable systems requiring both precision and robustness.
Availability
MAX8887EZK33-T is available at Aetrix Electronics and suitable for cellular phones, notebook computers, handheld medical instruments, and digital cameras requiring stable component supply with guaranteed long-term manufacturability.
Supply support for MAX8887EZK33-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 MAX8887/MAX8888 family was engineered specifically for battery-powered portable electronics - prioritizing low quiescent current, low noise, small footprint, and robust protection in minimal SOT23 packaging.
FAQ
What is the maximum input voltage rating for MAX8887EZK33-T?
The MAX8887EZK33-T has an absolute maximum input voltage of +7V referenced to GND, but its operational input range is strictly 2.5V to 5.5V. Exceeding 5.5V may cause permanent damage or violate functional specifications. The device includes input undervoltage lockout (UVLO) that disables regulation below ~2.4V to prevent unstable startup.
Does MAX8887EZK33-T include thermal shutdown protection?
Yes, the MAX8887EZK33-T incorporates thermal shutdown protection that activates at +170°C junction temperature, turning off the pass transistor until the die cools by 20°C hysteresis. This feature prevents catastrophic failure during sustained overload or poor PCB heat sinking - a key differentiator from basic LDOs lacking thermal monitoring.
How does the BP pin function in MAX8887EZK33-T?
The BP (Bypass) pin in MAX8887EZK33-T connects directly to the internal voltage reference node. Adding a 0.01µF low-leakage ceramic capacitor between BP and GND forms a low-pass filter that reduces reference noise - enabling the specified 42µVRMS output noise performance. Omitting this capacitor degrades noise to ~360µVRMS (as seen in MAX8888 variants).
What is the typical dropout voltage of MAX8887EZK33-T at full 300mA load?
The typical dropout voltage of MAX8887EZK33-T at 300mA load is 150mV (per Electrical Characteristics table, VOUT = +3.3V). At 200mA, it drops to 100mV - reflecting the RDS(ON) × ILOAD relationship of its PMOS pass element. This enables reliable regulation down to VIN = 3.45V at full load.
Is MAX8887EZK33-T pin-compatible with MAX8888EZK33-T?
No, MAX8887EZK33-T and MAX8888EZK33-T are not pin-compatible. The MAX8887 uses Pin 4 for BP (bypass), while the MAX8888 uses Pin 4 for POK (power-ok). Their pinouts differ: MAX8887 is IN-GND-SHDN-BP-OUT; MAX8888 is IN-GND-SHDN-POK-OUT. Swapping them without PCB revision will cause functional failure.
MAX8887EZK33-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-5 Thin, TSOT-23-5
- Packaging:
- Bulk
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.15V @ 300mA (Typ)
- Current - Output:
- 300mA
- Current - Quiescent (Iq):
- 100 µA
- Current - Supply (Max):
- 65 µA
- PSRR:
- 60dB (1kHz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature, Short Circuit
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-5
MAX8887EZK33-T FAQ
1.How can I place an order for MAX8887EZK33-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8887EZK33-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 MAX8887EZK33-T reliable?
The price and inventory of MAX8887EZK33-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8887EZK33-T is usually 5 days.
3.What payment methods are accepted for MAX8887EZK33-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8887EZK33-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8887EZK33-T?
MAX8887EZK33-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8887EZK33-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 MAX8887EZK33-T?
For technical support, including MAX8887EZK33-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8887EZK33-T requirements.
6.How does Aetrix verify that MAX8887EZK33-T is sourced from the original manufacturer or authorized distributors?
All MAX8887EZK33-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 MAX8887EZK33-T meets industry standards.
7.What is the process for return or replacement of MAX8887EZK33-T?
All MAX8887EZK33-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX8887EZK33-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 MAX8887EZK33-T part is unused and in its original packaging.
Return procedure for MAX8887EZK33-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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