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Analog Devices Inc./Maxim Integrated MAX8877EZK18
- Part No.:
- MAX8877EZK18
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
MAX8877EZK18.pdf
- Description:
- IC REG LINEAR LDO
- Quantity:
- Payment:
- Shipping:
Inventory:1,679
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Product details
Overview
The MAX8877EZK18 from Maxim Integrated is a low-noise, low-dropout linear regulator with 1.8V fixed output, 150mA maximum load capability, 165mV dropout at full load, 30µVRMS output noise, and 100µA operating supply current - designed for battery-powered portable electronics requiring stable, clean power under tight voltage margins.
For engineers reviewing the MAX8877EZK18 datasheet, MAX8877EZK18 pinout, MAX8877EZK18 application, or MAX8877EZK18 equivalent, key selection criteria include its SOT23-5 thin-package footprint, ±1.4% output voltage accuracy over temperature, reverse-battery protection, 10nA shutdown current, and compatibility with industry-standard '2982 pinout for drop-in replacement in space-constrained designs.
Technical Context
The MAX8877EZK18 uses an internal P-channel MOSFET pass transistor (1.1Ω typical RDS(ON)) to achieve low dropout and eliminate base-drive current loss - enabling consistent 100µA quiescent current across light-load, heavy-load, and dropout conditions. Its error amplifier compares a 1.25V bandgap reference against feedback from an internal resistor divider tied to the OUT pin.
Noise reduction is implemented via a dedicated BP pin connected to a 0.01µF ceramic capacitor, forming an 80Hz low-pass filter with an internal 200kΩ resistor; this yields 30µVRMS integrated noise (10Hz–100kHz) and supports stable operation with 3.3µF output capacitance for 1.8V output.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8V ±1.4% (–40°C to +85°C), enabling direct powering of 1.8V logic rails without external resistors. |
| Max Output Current | 150mA continuous - sufficient for baseband processors, RF front-ends, and sensor interfaces in handheld devices. |
| Dropout Voltage | 165mV at 150mA load - allows operation down to 1.965V input, extending usable battery life in single-cell Li-ion or NiMH systems. |
| Output Noise | 30µVRMS (10Hz–100kHz) with 0.01µF BP cap - meets stringent noise requirements for ADC references and RF synthesizers. |
| Quiescent Current | 100µA over full load and dropout range - minimizes standby power loss in always-on subsystems. |
| Shutdown Current | 10nA logic-controlled shutdown - enables ultra-low-power sleep modes in portable instrumentation. |
| Input Voltage Range | 2.5V to 6.5V - supports single-cell Li-ion (2.7–4.2V), dual-cell alkaline (3–3.2V), and regulated 3.3V/5V rails. |
Pinout & Package
MAX8877EZK18 is housed in a 5-pin thin SOT23 package (JEDEC MO-178AA), optimized for PCB area and thermal performance in portable applications. The GND pin serves as both electrical return and primary thermal path - requires connection to a large copper pour or ground plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN | Regulator input supply | Accepts 2.5V–6.5V; requires ≥1µF ceramic bypass to GND for line-transient immunity and stability. |
| 2 GND | Ground reference and thermal sink | Electrical return path and primary heat dissipation node - must be soldered to ≥25mm² copper area. |
| 3 SHDN | Active-low enable/shutdown control | Pulls <10nA in shutdown; connects to IN for always-on operation; no auto-discharge (MAX8878 feature only). |
| 4 BP | Bypass capacitor connection for noise filtering | Connects to 0.01µF low-leakage ceramic cap to reduce reference noise - critical for achieving 30µVRMS output noise. |
| 5 OUT | Regulated 1.8V output | Supplies up to 150mA; requires 3.3µF ceramic cap (ESR <0.2Ω) for stability at 1.8V output per datasheet guidance. |
Key Features
| Feature | Design Value |
|---|---|
| P-channel MOSFET pass element | Eliminates base-drive current loss - maintains 100µA quiescent current regardless of load or dropout condition. |
| Reverse battery protection | Limits reverse supply current to ≤1mA when VIN or SHDN falls below GND - prevents damage during battery insertion errors. |
| Thermal shutdown with hysteresis | Triggers at +155°C junction temperature and re-enables after 15°C cooldown - protects against sustained overload without latch-up. |
| Current limiting | Guarantees ≥160mA minimum current limit (up to 390mA typical) - enables safe short-circuit operation indefinitely. |
| '2982 pinout compatibility | Direct mechanical and electrical replacement for legacy regulators - avoids PCB redesign in upgrade paths. |
Applications
| Cellular Handsets | PCMCIA Cards |
|---|---|
|
Use Scenario: Powering baseband processor I/O banks and RF transceiver bias circuits in GSM/CDMA handsets. IC Role / Device Role / Timing Role: Primary 1.8V LDO delivering clean, low-noise supply with fast transient response to dynamic load steps. Use Value: 30µVRMS noise and 12mV load-step deviation ensure signal integrity for 12-bit ADCs and PLL VCOs. |
Use Scenario: Providing regulated 1.8V power to JEDEC-compliant PCMCIA Type II card controllers and SRAM buffers. IC Role / Device Role / Timing Role: Compact-area, low-quiescent LDO meeting PCMCIA hot-swap and standby current requirements. Use Value: 10nA shutdown current and 100µA operating IQ support compliance with PCMCIA CardBus power management profiles. |
| Palmtop Computers | Electronic Planners |
|
Use Scenario: Supplying core logic voltage to ARM7-based palmtop SoCs during active and suspend states. IC Role / Device Role / Timing Role: Main system LDO with thermal and short-circuit protection for unattended operation in confined enclosures. Use Value: 165mV dropout extends runtime from single-cell Li-ion batteries down to 1.965V, delaying brownout events. |
Use Scenario: Powering real-time clock (RTC), memory backup, and touch-screen controller in battery-only planners. IC Role / Device Role / Timing Role: Low-noise, low-IQ regulator maintaining timekeeping accuracy and display responsiveness. Use Value: ±1.4% output accuracy over –40°C to +85°C ensures reliable RTC oscillator bias and EEPROM write margins. |
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 |
|---|---|---|---|
| MAX8877EUK18-T | Same electrical specs but in regular (not thin) SOT23-5 package - 0.9mm height vs. 0.75mm for EZK variant. | Compatible where board height budget permits; identical pinout and thermal derating (571mW vs. 727mW for thin). | Select MAX8877EUK18-T if standard SOT23-5 assembly processes are preferred; choose MAX8877EZK18-T for ultra-thin form factors. |
| Torex XC6206P182MR-G | 1.8V, 150mA LDO with 250mV dropout at 150mA and 40µVRMS noise - higher dropout and noise than MAX8877EZK18. | Suitable for cost-sensitive, non-noise-critical applications; lacks reverse-battery protection and '2982 pinout. | Choose XC6206P182MR-G only when footprint compatibility is not required and 165mV dropout margin is noncritical. |
Compared with MAX8877EUK18-T, the MAX8877EZK18 offers 27% lower profile and 27% higher power dissipation rating; versus XC6206P182MR-G, it delivers 35% lower dropout and 25% lower noise - making MAX8877EZK18 the optimal choice for height-constrained, noise-sensitive battery systems.
Availability
MAX8877EZK18 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 availability and full traceability.
Supply support for MAX8877EZK18 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 semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, communications, and consumer applications.
The MAX8877/MAX8878 product line was engineered specifically for battery-powered portable electronics - prioritizing ultra-low quiescent current, low-noise regulation, and robust protection features in minimal SOT23 footprints.
FAQ
What is the output voltage tolerance of the MAX8877EZK18 over temperature?
The MAX8877EZK18 guarantees ±1.4% output voltage accuracy across the full –40°C to +85°C operating temperature 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 all output voltages ≥2.5V or <2.5V - and applies directly to the 1.8V MAX8877EZK18 variant per the Expanded Ordering Information table.
Does the MAX8877EZK18 include auto-discharge functionality during shutdown?
No, the MAX8877EZK18 does not include auto-discharge functionality. That feature is exclusive to the MAX8878 family members (e.g., MAX8878EZK18-T), which actively discharge the output to ground when SHDN is asserted. The MAX8877EZK18 enters ultra-low-current shutdown (10nA) but leaves the output floating - requiring external discharge circuitry if rapid VOUT decay is needed.
What output capacitor value is required for stable operation of the MAX8877EZK18 at 1.8V?
The MAX8877EZK18 requires a minimum 3.3µF ceramic output capacitor (with ESR <0.2Ω) for stable operation at 1.8V output, as explicitly specified in the "Capacitor Selection and Regulator Stability" section. This value is higher than the 1µF recommended for outputs ≥2.5V due to reduced phase margin at lower VOUT; X7R or X5R dielectrics are preferred for stable capacitance across temperature.
Can the MAX8877EZK18 operate from a 2.5V input while regulating 1.8V output?
Yes, the MAX8877EZK18 can operate from a 2.5V input while regulating 1.8V output - its absolute minimum input voltage is 2.5V, and its dropout voltage is 165mV at 150mA. At 2.5V input, the device sustains regulation down to 2.335V output, well above the 1.8V nominal - providing 535mV headroom that supports full 150mA load capability and transient margin.
Is the MAX8877EZK18 pin-compatible with the industry-standard '2982 regulator?
Yes, the MAX8877EZK18 is explicitly designed as pin-compatible with the industry-standard '2982 regulator family, as stated in the General Description and Pin Configuration sections. It shares identical pin numbering (IN, GND, SHDN, BP, OUT), same SOT23-5 footprint, and matching electrical interface - enabling direct drop-in replacement without PCB modification.
MAX8877EZK18 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):
- 1.8V
- 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
MAX8877EZK18 FAQ
1.How can I place an order for MAX8877EZK18 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8877EZK18 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 MAX8877EZK18 reliable?
The price and inventory of MAX8877EZK18 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8877EZK18 is usually 5 days.
3.What payment methods are accepted for MAX8877EZK18?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8877EZK18 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8877EZK18?
MAX8877EZK18 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8877EZK18 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 MAX8877EZK18?
For technical support, including MAX8877EZK18 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8877EZK18 requirements.
6.How does Aetrix verify that MAX8877EZK18 is sourced from the original manufacturer or authorized distributors?
All MAX8877EZK18 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 MAX8877EZK18 meets industry standards.
7.What is the process for return or replacement of MAX8877EZK18?
All MAX8877EZK18 units undergo pre-shipment inspection (PSI). If there is an issue with MAX8877EZK18, 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 MAX8877EZK18 part is unused and in its original packaging.
Return procedure for MAX8877EZK18:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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