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Analog Devices Inc./Maxim Integrated MAX8877EZK33+T
- Part No.:
- MAX8877EZK33+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
MAX8877EZK33+T.pdf
- Description:
- IC REG LIN 3.3V 150MA TSOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:17,500
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Product details
Overview
MAX8877EZK33+T from Maxim Integrated is a low-noise, low-dropout linear regulator with fixed 3.3V output, delivering up to 150mA from a 2.5V–6.5V input. It features 30µVRMS output noise, 165mV dropout at 150mA, and 100µA operating supply current independent of load or dropout condition. Designed for battery-powered portable electronics requiring stable, clean power rails.
For engineers reviewing the MAX8877EZK33+T datasheet, MAX8877EZK33+T pinout, MAX8877EZK33+T application, or MAX8877EZK33+T equivalent, key selection criteria include output voltage accuracy (±1.4%), thermal shutdown behavior (155°C), reverse battery protection, and SOT23-5 thin-package thermal performance (θJB = 110°C/W).
Technical Context
The MAX8877EZK33+T uses an internal P-channel MOSFET pass transistor (1.1Ω typical RDS(ON)) to achieve low dropout and eliminate base-drive current losses. Its error amplifier compares a 1.25V bandgap reference against feedback from an internal resistor divider tied to the OUT pin.
It integrates logic-controlled shutdown (10nA ISHDN), thermal overload protection with 15°C hysteresis, short-circuit current limiting (160–390mA), and reverse battery protection limiting reverse current to 1mA. The BP pin accepts a 0.01µF ceramic capacitor to form an 80Hz low-pass filter that reduces reference noise.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3V ±1.4% over -40°C to +85°C and 0.1–120mA load |
| Max Output Current | 150mA continuous; current limit activates at ≥160mA (min) |
| Dropout Voltage | 165mV at 150mA load - defines minimum VIN needed to sustain regulation |
| Output Noise | 30µVRMS (10Hz–100kHz) with 0.01µF BP cap - critical for RF/analog supply filtering |
| Quiescent Current | 100µA across full load range and dropout - enables long battery life in standby |
| Shutdown Current | 10nA typical at +25°C - ensures negligible drain during system sleep |
| Thermal Shutdown | Triggers at 155°C junction temperature with 15°C hysteresis - prevents permanent damage |
Pinout & Package
MAX8877EZK33+T is housed in a 5-pin thin SOT23 package (JEDEC MO-178AA), optimized for low thermal resistance (θJB = 110°C/W) and space-constrained PCB layouts. The GND pin serves as both electrical return and primary thermal path - requires soldering to a large copper area or ground plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN | Input supply connection | Accepts 2.5V–6.5V; requires ≥1µF ceramic bypass to GND for stability and line transient rejection |
| 2 GND | Ground reference and thermal sink | Electrical return path and primary heat conduction route - must connect to large copper area |
| 3 SHDN | Active-low enable control | Pull low to enter 10nA shutdown; on MAX8878 only, initiates active output discharge (not applicable to MAX8877) |
| 4 BP | Bypass for internal reference | Connects to 0.01µF ceramic capacitor to reduce output noise by filtering reference voltage |
| 5 OUT | Regulated output | Delivers up to 150mA at 3.3V; requires ≥3.3µF ceramic cap (ESR < 0.2Ω) for VOUT < 2.5V - but 3.3V uses 1µF min |
Key Features
| Feature | Design Value |
|---|---|
| P-channel MOSFET pass element | Eliminates base-drive current loss - maintains 100µA IQ even in dropout or heavy load |
| Reverse battery protection | Clamps reverse current to ≤1mA when VIN or SHDN falls below GND - prevents damage in miswired battery packs |
| Low-noise BP pin architecture | 0.01µF capacitor forms 80Hz RC filter on internal 1.25V reference - achieves 30µVRMS output noise |
| Thermal shutdown with hysteresis | Shuts down at 155°C and re-enables only after cooling 15°C - avoids oscillation during sustained overload |
| 100mV-output increment options | Factory-set 3.3V output (suffix "33") with ±1.4% accuracy - eliminates external feedback resistors and layout complexity |
Applications
| Cellular Handsets | PCMCIA Cards |
|---|---|
|
Use Scenario: Powering RF transceivers and baseband processors in GSM/CDMA handsets with single-cell Li-ion (2.7–4.2V) input. IC Role / Device Role / Timing Role: Primary 3.3V LDO supplying noise-sensitive analog circuitry and digital core logic. Use Value: 30µVRMS noise and 165mV dropout extend usable battery voltage range and preserve signal integrity in receiver front-ends. |
Use Scenario: Providing regulated 3.3V power to PCMCIA Type II cards inserted into laptops or industrial hosts. IC Role / Device Role / Timing Role: Standalone voltage regulator enabling hot-plug compatibility and isolation from host rail variations. Use Value: Reverse battery protection prevents damage during card insertion/removal; 10nA shutdown supports card presence detection without loading host bus. |
| Palmtop Computers | Electronic Planners |
|
Use Scenario: Supplying 3.3V to microcontroller, LCD controller, and SRAM in compact palmtop devices powered by dual AA/AAA cells. IC Role / Device Role / Timing Role: Main system regulator managing dynamic load steps during display refresh and data entry. Use Value: 12mV load-transient deviation (0→50mA) and fast 300µs startup ensure stable operation during burst-mode CPU activity. |
Use Scenario: Delivering clean 3.3V to real-time clock (RTC), memory, and touch interface in low-power electronic organizers. IC Role / Device Role / Timing Role: Always-on power source maintaining RTC accuracy and nonvolatile memory retention during deep sleep. Use Value: 100µA quiescent current and 10nA shutdown minimize battery drain - extends shelf life beyond 1 year on CR2032 coin cell. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-noise LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS76333DBVR | Higher 220mV dropout at 150mA; 50µVRMS noise; 85µA IQ; SOT23-5 package | Lacks reverse battery protection and BP noise-filtering pin; lower accuracy (±2%) | Choose when cost sensitivity outweighs noise and protection requirements |
| MCP1700-3302E/TO | 250mV dropout at 250mA; 30µVRMS noise; 1.6µA IQ; SOT23-3 package (no SHDN/BP) | No shutdown or bypass pin; fixed 3.3V but no thermal hysteresis or reverse protection | Prefer for ultra-low-IQ always-on rails where footprint and simplicity dominate |
Compared with TPS76333DBVR and MCP1700-3302E/TO, the MAX8877EZK33+T uniquely combines ultra-low noise (30µVRMS), reverse battery protection, and BP-based noise filtering in a thermally enhanced thin SOT23 - making it optimal for high-integrity portable analog power domains.
Availability
MAX8877EZK33+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 manufacturability and consistent parametric performance.
Supply support for MAX8877EZK33+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 precision analog, mixed-signal, and power management ICs for demanding industrial, communications, and consumer applications.
The MAX8877/MAX8878 family delivers low-noise, low-dropout regulation for battery-powered portable systems - prioritizing extended runtime, output stability under transient loads, and robustness against reverse polarity and thermal faults.
FAQ
What is the output voltage tolerance of the MAX8877EZK33+T over temperature and load?
The MAX8877EZK33+T guarantees ±1.4% output voltage accuracy across -40°C to +85°C ambient temperature and 0.1mA to 120mA load current. At +25°C and 0.1mA load, typical deviation is ±1.0%. This tight tolerance eliminates need for post-production calibration in 3.3V digital supply rails.
Does the MAX8877EZK33+T include reverse battery protection, and how does it function?
Yes, the MAX8877EZK33+T includes integrated reverse battery protection. When either the IN or SHDN pin falls below GND, internal circuitry disconnects parasitic paths and limits reverse current to ≤1mA - preventing damage during incorrect battery installation in handheld devices.
What capacitor values are required for stable operation of the MAX8877EZK33+T?
For stable operation, the MAX8877EZK33+T requires a 1µF ceramic capacitor (X5R/X7R, ESR < 0.2Ω) on the OUT pin and a 1µF ceramic capacitor on the IN pin. A 0.01µF ceramic capacitor must be placed on the BP pin to achieve specified 30µVRMS noise performance.
How does the MAX8877EZK33+T behave during thermal overload conditions?
When junction temperature exceeds 155°C, the MAX8877EZK33+T enters thermal shutdown and disables the pass transistor. It remains off until temperature drops by 15°C (to ~140°C), then resumes regulation - producing a pulsed output during sustained overload to prevent permanent damage.
Is the MAX8877EZK33+T pin-compatible with the industry-standard '2982 regulator?
Yes, the MAX8877EZK33+T is explicitly designed as a pin-compatible upgrade to the industry-standard µA78Lxx and MC78Lxx series (collectively referenced as '2982). It shares identical SOT23-5 pinout (IN, GND, SHDN, BP, OUT) and mounting footprint while improving dropout, noise, and protection features.
MAX8877EZK33+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):
- 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):
- 100 µA
- PSRR:
- -
- 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:
- TSOT-23-5
MAX8877EZK33+T FAQ
1.How can I place an order for MAX8877EZK33+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8877EZK33+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 MAX8877EZK33+T reliable?
The price and inventory of MAX8877EZK33+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8877EZK33+T is usually 5 days.
3.What payment methods are accepted for MAX8877EZK33+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8877EZK33+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8877EZK33+T?
MAX8877EZK33+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8877EZK33+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 MAX8877EZK33+T?
For technical support, including MAX8877EZK33+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8877EZK33+T requirements.
6.How does Aetrix verify that MAX8877EZK33+T is sourced from the original manufacturer or authorized distributors?
All MAX8877EZK33+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 MAX8877EZK33+T meets industry standards.
7.What is the process for return or replacement of MAX8877EZK33+T?
All MAX8877EZK33+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX8877EZK33+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 MAX8877EZK33+T part is unused and in its original packaging.
Return procedure for MAX8877EZK33+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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