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Analog Devices Inc./Maxim Integrated MAX8877EZK32+T
- Part No.:
- MAX8877EZK32+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
MAX8877EZK32+T.pdf
- Description:
- IC REG LIN 3.15V 150MA TSOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,721
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Product details
Overview
MAX8877EZK32+T from Maxim Integrated is a low-noise, low-dropout linear regulator with 3.15V fixed output, 150mA max load, 165mV dropout at full load, 30µVRMS output noise, and 100µA operating supply current. It uses an internal P-channel MOSFET pass transistor and operates from 2.5V to 6.5V input, targeting battery-powered portable electronics requiring stable, quiet voltage regulation.
For engineers reviewing the MAX8877EZK32+T datasheet, MAX8877EZK32+T pinout, MAX8877EZK32+T application, or MAX8877EZK32+T equivalent, key selection criteria include dropout performance at 150mA, 3.15V output accuracy (±1.4%), shutdown current (10nA), thermal protection (155°C trip), and SOT23-5 thin-package thermal resistance (110°C/W).
Technical Context
The MAX8877EZK32+T implements a P-channel MOSFET pass element with 1.1Ω typical RDS(ON), enabling low dropout and load-independent quiescent current. Its error amplifier compares a 1.25V bandgap reference against feedback from an internal resistor divider tied to the OUT pin.
Noise reduction relies on a dedicated BP pin with external 0.01µF capacitor forming an 80Hz low-pass filter; PSRR is 63dB at low frequencies and rolls off above 10kHz. Thermal shutdown activates at 155°C with 15°C hysteresis, and reverse battery protection limits reverse current to 1mA when IN or SHDN falls below GND.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.15V ±1.4% - factory-preset, eliminates external feedback resistors and ensures tight tolerance across -40°C to +85°C. |
| Max Output Current | 150mA - supports moderate-power analog/digital loads such as RF front-ends or microcontroller cores in portable devices. |
| Dropout Voltage | 165mV at 150mA - enables operation down to VIN = 3.315V, extending usable battery life in single-cell Li-ion or multi-cell alkaline systems. |
| Output Noise | 30µVRMS (10Hz–100kHz) - low enough for noise-sensitive analog circuits like ADC references or RF synthesizers without additional filtering. |
| Quiescent Current | 100µA (operating), 10nA (shutdown) - minimizes standby drain in always-on subsystems and enables rapid wake-up from ultra-low-power states. |
| Input Voltage Range | 2.5V to 6.5V - compatible with single-cell Li-ion (2.7–4.2V), LiFePO4 (2.0–3.6V with margin), and dual-cell alkaline (up to 3.2V fresh). |
| Thermal Protection | 155°C shutdown with 15°C hysteresis - prevents permanent damage during sustained overload or poor PCB heatsinking. |
Pinout & Package
MAX8877EZK32+T is housed in a 5-pin thin SOT23 package (JEDEC MO-178AA), optimized for space-constrained portable designs with lower thermal resistance (θJB = 110°C/W) versus regular SOT23.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - IN | Regulator input supply | Accepts 2.5V–6.5V; requires ≥1µF ceramic bypass to GND for stability and line-transient suppression. |
| 2 - GND | Power ground and thermal path | Serves as primary heat sink; must connect to large copper area or ground plane to maintain TJ ≤ 150°C under full load. |
| 3 - SHDN | Active-low enable control | Pulls <0.4V to enter 10nA shutdown; on MAX8877 (not MAX8878), no auto-discharge - output floats high when disabled. |
| 4 - BP | Bypass for reference noise filter | Connects to 0.01µF ceramic capacitor to reduce output noise; values >0.1µF increase startup delay without benefit. |
| 5 - OUT | Regulated output | Delivers up to 150mA; requires ≥3.3µF ceramic capacitor (ESR <0.2Ω) for VOUT < 2.5V; 1µF sufficient for 3.15V output. |
Key Features
| Feature | Design Value |
|---|---|
| P-channel MOSFET pass transistor | Eliminates base-drive current loss, enabling constant 100µA IQ across all load conditions including dropout. |
| 10nA logic-controlled shutdown | Reduces system standby power to nanoampere level while preserving fast wake-up (<300µs exit delay with 0.1µF BP cap). |
| Reverse battery protection | Blocks reverse current to <1mA if IN or SHDN is driven below GND, preventing damage in miswired battery compartments. |
| Internal current limit | Guarantees 160mA minimum short-circuit current limit, allowing indefinite output shorting without device failure. |
| Low-noise BP pin architecture | Enables 30µVRMS noise via simple 0.01µF external capacitor - avoids costly LDO post-regulation filters in sensitive signal chains. |
Applications
| Cellular Handsets | PCMCIA Cards |
|---|---|
Use Scenario: Powering RF transceiver bias rails and baseband processor I/O supplies in GSM/UMTS handsets with single-cell Li-ion batteries. IC Role / Device Role / Timing Role: Primary low-noise 3.15V supply for analog front-end circuitry requiring minimal PSRR degradation and stable voltage under dynamic load steps. Use Value: 165mV dropout extends usable battery range to ~3.3V, while 30µVRMS noise prevents EVM degradation in transmit paths. | Use Scenario: Providing regulated 3.15V to PCMCIA card controllers and interface logic in laptop expansion slots. IC Role / Device Role / Timing Role: Local point-of-load regulator isolating card logic from noisy host bus power, with fast transient response to handle burst data transfers. Use Value: 100µA quiescent current minimizes standby drain during card sleep modes; 150mA rating supports peak interface activity without brownout. |
| Hand-Held Instruments | Electronic Planners |
Use Scenario: Supplying precision ADC reference buffers and sensor signal conditioning stages in portable multimeters and data loggers. IC Role / Device Role / Timing Role: Low-drift, low-noise voltage source for 16-bit+ analog signal chains where supply ripple directly impacts measurement accuracy. Use Value: ±1.4% output accuracy and 30µVRMS noise ensure <0.01% gain error contribution and sub-LSB noise floor in DC-coupled measurements. | Use Scenario: Powering real-time clock (RTC) backup domains and low-power microcontrollers in PDAs and scheduling assistants. IC Role / Device Role / Timing Role: Always-on regulator maintaining RTC and memory retention during main system shutdown. Use Value: 10nA shutdown current enables multi-year battery life on coin cells; thermal protection prevents overheating in sealed plastic enclosures. |
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 | 3.3V output, 150mA, 220mV dropout at 150mA, 35µVRMS noise, SOT23-5 package | Higher dropout reduces usable battery range; slightly higher noise affects ultra-sensitive analog stages | Select when 3.3V (not 3.15V) matches system rail requirements and board layout already accommodates TI's footprint. |
| MCP1700T-315I/TT | 3.15V output, 250mA, 600mV dropout at 250mA, 30µVRMS noise, SOT23-3 package | SOT23-3 lacks BP pin and SHDN; no shutdown mode or noise optimization capability | Choose only for cost-sensitive, non-shutdown applications where 600mV dropout is acceptable and board space is extremely limited. |
Compared with TPS76333DBVR and MCP1700T-315I/TT, the MAX8877EZK32+T delivers tighter output accuracy (±1.4% vs ±2%), lower dropout (165mV vs 220mV/600mV), and integrated BP noise filtering - making it optimal for battery-life-critical, noise-sensitive portable systems requiring 3.15V.
Availability
MAX8877EZK32+T is available at Aetrix Electronics and suitable for cellular handsets, PCMCIA cards, hand-held instruments, and electronic planners requiring stable component supply with guaranteed long-term availability and consistent parametric performance.
Supply support for MAX8877EZK32+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 MAX8877/MAX8878 family was designed specifically for battery-powered portable electronics needing ultra-low quiescent current, low noise, and minimal dropout - balancing efficiency, size, and signal integrity in space- and power-constrained designs.
FAQ
What is the exact output voltage tolerance of the MAX8877EZK32+T over temperature?
The MAX8877EZK32+T guarantees ±1.4% output voltage accuracy across the full -40°C to +85°C operating range, with tighter ±1.4% tolerance maintained at +25°C. This specification is confirmed in the Electrical Characteristics table under "Output Voltage Accuracy" with test conditions covering IOUT = 0.1mA to 120mA and VOUT ≥ 2.5V. The MAX8877EZK32+T achieves this via laser-trimmed internal feedback resistors and a stable 1.25V bandgap reference.
Does the MAX8877EZK32+T include auto-discharge functionality during shutdown?
No, the MAX8877EZK32+T does not include auto-discharge. Auto-discharge is exclusive to the MAX8878 variant (e.g., MAX8878EZK32+T), which actively pulls the OUT pin to GND via an internal 300Ω resistor when SHDN is asserted. The MAX8877EZK32+T places the output in high-impedance state during shutdown - the output voltage remains floating and decays only through external load or leakage paths.
What capacitor values are required for stable operation of the MAX8877EZK32+T?
For stable operation, the MAX8877EZK32+T requires a 1µF ceramic input capacitor (CIN) and a minimum 1µF ceramic output capacitor (COUT) with ESR <0.2Ω. Since its output is 3.15V (>2.5V), 1µF suffices; no 3.3µF requirement applies. A 0.01µF ceramic capacitor must be placed on the BP pin. All capacitors should use X5R or X7R dielectric for stable capacitance across temperature.
How does the MAX8877EZK32+T achieve low noise performance?
The MAX8877EZK32+T achieves 30µVRMS output noise by routing its internal 1.25V bandgap reference through a dedicated BP pin, where an external 0.01µF capacitor forms an 80Hz low-pass filter with an internal 200kΩ resistor. This architecture isolates reference noise from the error amplifier, preventing it from modulating the output. The MAX8877EZK32+T confirms this performance with CBP = 0.01µF and COUT = 10µF under 10Hz–100kHz bandwidth.
Is the MAX8877EZK32+T pin-compatible with the industry-standard '2982 regulator?
Yes, the MAX8877EZK32+T is explicitly pin-compatible with the industry-standard µA78Lxx and MC78Lxx series (collectively referenced as '2982 in Maxim documentation). Pin-for-pin mapping is IN–GND–SHDN–BP–OUT across SOT23-5 packages. This allows direct replacement in existing designs using '2982 footprints, provided the 3.15V output and BP pin usage are validated in the target application.
MAX8877EZK32+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):
- 3.2V
- 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
MAX8877EZK32+T FAQ
1.How can I place an order for MAX8877EZK32+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8877EZK32+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 MAX8877EZK32+T reliable?
The price and inventory of MAX8877EZK32+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8877EZK32+T is usually 5 days.
3.What payment methods are accepted for MAX8877EZK32+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8877EZK32+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8877EZK32+T?
MAX8877EZK32+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8877EZK32+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 MAX8877EZK32+T?
For technical support, including MAX8877EZK32+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8877EZK32+T requirements.
6.How does Aetrix verify that MAX8877EZK32+T is sourced from the original manufacturer or authorized distributors?
All MAX8877EZK32+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 MAX8877EZK32+T meets industry standards.
7.What is the process for return or replacement of MAX8877EZK32+T?
All MAX8877EZK32+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX8877EZK32+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 MAX8877EZK32+T part is unused and in its original packaging.
Return procedure for MAX8877EZK32+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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