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Analog Devices Inc./Maxim Integrated MAX8877EUK15+
- Part No.:
- MAX8877EUK15+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX8877EUK15+.pdf
- Description:
- IC REG LINEAR LOW NOISE LDO
- Quantity:
- Payment:
- Shipping:
Inventory:1,991
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Product details
Overview
MAX8877EUK15+ from Maxim Integrated is a low-noise, low-dropout linear regulator with 1.5V fixed output, 2.5V–6.5V input range, 150mA max output current, 165mV dropout at full load, and 30µVRMS output noise. It uses an internal P-channel MOSFET pass device and delivers stable power to battery-powered portable electronics requiring precise, quiet voltage regulation.
For engineers reviewing the MAX8877EUK15+ datasheet, MAX8877EUK15+ pinout, MAX8877EUK15+ application, or MAX8877EUK15+ equivalent, key selection criteria include dropout performance at 150mA, shutdown current (10nA), output voltage accuracy (±1.4%), thermal protection (155°C), and SOT23-5 package compatibility with industry-standard '2982 footprint.
Technical Context
The MAX8877EUK15+ employs a 1.25V bandgap reference and error amplifier driving a 1.1Ω typical P-channel MOSFET pass transistor, enabling ultra-low quiescent current (100µA across all load and dropout conditions). Its BP pin accepts a 0.01µF ceramic capacitor to form an 80Hz low-pass filter that suppresses reference noise, directly enabling the 30µVRMS output noise specification.
It integrates reverse-battery protection limiting reverse current to 1mA, thermal shutdown at 155°C with 15°C hysteresis, and short-circuit protection with 160mA minimum current limit. Unlike the MAX8878 variant, it lacks auto-discharge functionality - shutdown places the output in high-impedance state without active discharge.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.5V ±1.4% (guaranteed over -40°C to +85°C, 0.1–120mA load) |
| Input Voltage Range | 2.5V to 6.5V - supports single-cell Li-ion (fully charged), dual-cell alkaline/NiMH, or regulated 3.3V/5V rails |
| Max Output Current | 150mA - sufficient for RF front-ends, microcontroller cores, or sensor signal chains in portable devices |
| Dropout Voltage | 165mV at 150mA - enables operation down to 1.665V input, extending usable battery life in 1.5V systems |
| Output Noise | 30µVRMS (10Hz–100kHz) - achieved via BP pin 0.01µF bypass; critical for ADC references and RF synthesizers |
| Quiescent Current | 100µA (operating, any load/dropout); 10nA (shutdown) - preserves battery shelf life in always-on standby modes |
| Shutdown Threshold | VIL ≤ 0.4V, VIH ≥ 2.0V (VIN = 2.5–5.5V) - compatible with standard CMOS logic and microcontroller GPIO |
Pinout & Package
MAX8877EUK15+ is housed in a 5-pin SOT23-5 regular package (JEDEC MO-178AA), with GND serving as both electrical return and thermal path. The package is RoHS-compliant and rated for -40°C to +85°C operation.
| 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 immunity |
| 2 - GND | Ground reference and thermal sink | Must connect to large PCB copper area to dissipate heat; junction-to-board thermal resistance θJB = 140°C/W |
| 3 - SHDN | Active-low enable/shutdown control | Pull ≤0.4V to disable (10nA IQ); tie to IN for always-on operation; no auto-discharge on output |
| 4 - BP | Reference noise bypass | Connect 0.01µF low-leakage ceramic capacitor to reduce 1.25V reference noise - essential for 30µVRMS spec |
| 5 - OUT | Regulated output | Delivers up to 150mA; requires ≥3.3µF ceramic capacitor (ESR < 0.2Ω) for VOUT = 1.5V stability per datasheet |
Key Features
| Feature | Design Value |
|---|---|
| P-channel MOSFET pass element | Eliminates base-drive current loss; maintains 100µA IQ even in dropout - extends battery runtime vs. PNP-based regulators |
| Reverse battery protection | Clamps reverse current to ≤1mA when VIN or SHDN falls below GND - prevents damage during incorrect battery insertion |
| Thermal shutdown with hysteresis | Shuts down at 155°C; restarts at 140°C - protects against sustained overload without latch-up or manual reset |
| Pin-compatible with '2982 family | Direct drop-in replacement for legacy 150mA LDOs in existing SOT23-5 layouts - no PCB redesign required |
| Low-noise BP pin architecture | Internal 200kΩ resistor + external 0.01µF forms dedicated 80Hz filter - isolates reference noise without compromising transient response |
Applications
| Cellular Handset RF Power Amplifier Bias | Palmtop Computer Core Voltage Rail |
|---|---|
Use Scenario: Supplying clean bias voltage to GaAs pHEMT power amplifiers in GSM/EDGE handsets where supply ripple directly modulates RF output. IC Role / Device Role / Timing Role: Low-noise LDO delivering stable 1.5V to PA drain, rejecting switching noise from PMU DC-DC converters. Use Value: 30µVRMS noise ensures EVM compliance; 165mV dropout allows operation until battery reaches 1.665V - maximizing talk time. |
Use Scenario: Powering ARM7/ARM9 processor core in space-constrained palmtop PCs operating from single-cell Li-ion. IC Role / Device Role / Timing Role: Primary 1.5V core regulator with fast load-transient response (<12mV overshoot) to handle CPU burst currents. Use Value: 100µA quiescent current minimizes standby drain; SOT23-5 footprint fits tight layout constraints without thermal derating. |
| Electronic Planner Real-Time Clock (RTC) Supply | PCMCIA Card 3.3V Logic Interface Regulator |
Use Scenario: Providing ultra-low-noise, always-on supply to RTC oscillator and backup SRAM in planner devices with multi-year battery life requirements. IC Role / Device Role / Timing Role: Always-enabled 1.5V LDO with 10nA shutdown - maintains timekeeping during deep sleep while minimizing self-discharge. Use Value: 10nA shutdown current enables >10-year coin-cell lifetime; ±1.4% output accuracy ensures calendar consistency over temperature. |
Use Scenario: Generating clean 1.5V auxiliary rail for PCMCIA card interface logic (e.g., JEDEC-compliant I/O buffers) powered from host 3.3V bus. IC Role / Device Role / Timing Role: Local point-of-load regulator decoupling host supply noise and meeting PCMCIA hot-swap inrush limits. Use Value: 150mA rating handles interface transients; 2.5V min input supports degraded 3.3V bus conditions; '2982 pinout simplifies legacy design reuse. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-noise, low-dropout LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX8860EUK15+ | Same 1.5V output, but 50mA max current and higher 220mV dropout at full load; uses NPN pass transistor. | Not suitable for 150mA loads; higher dropout reduces battery utilization in portable systems. | Select MAX8877EUK15+ when ≥150mA output and lowest possible dropout are required. |
| MCP1700T-1502E/TT | 1.5V fixed output, 250mA rating, but 175mV dropout at 250mA and 45µVRMS noise; different pinout (SOT23-3). | Higher noise degrades precision analog/RF performance; non-pin-compatible layout change needed. | Choose MAX8877EUK15+ for proven 30µVRMS noise and direct '2982 footprint compatibility. |
Compared with MAX8860EUK15+, the MAX8877EUK15+ delivers 3× higher output current and lower dropout for extended battery life; versus MCP1700T-1502E/TT, it offers superior noise performance and mechanical drop-in replacement capability without board rework.
Availability
MAX8877EUK15+ is available at Aetrix Electronics and suitable for cellular telephones, palmtop computers, electronic planners, and PCMCIA cards requiring stable component supply, long-term lifecycle support, and guaranteed parametric performance across industrial temperature range.
Supply support for MAX8877EUK15+ 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 product line was designed specifically for battery-powered portable electronics demanding ultra-low noise, minimal quiescent current, and robust protection features in ultra-small SOT23-5 packages.
FAQ
What is the maximum input voltage rating for the MAX8877EUK15+?
The MAX8877EUK15+ has an absolute maximum input voltage of +7V relative to GND. However, its specified operating input range is 2.5V to 6.5V. Exceeding 6.5V may cause functional instability or accelerated parametric drift, and operation above +7V risks permanent damage per the Absolute Maximum Ratings table.
Does the MAX8877EUK15+ include auto-discharge functionality during shutdown?
No, the MAX8877EUK15+ does not include auto-discharge. That feature is exclusive to the MAX8878 variant. When the MAX8877EUK15+ is placed in shutdown (SHDN ≤ 0.4V), the output enters a high-impedance state but remains floating - external circuitry must manage residual charge if rapid discharge is required.
What output capacitor value is required for stable operation of the MAX8877EUK15+ at 1.5V?
For MAX8877EUK15+ with 1.5V output, the datasheet specifies a minimum 3.3µF ceramic capacitor on the OUT pin (with ESR < 0.2Ω) to ensure stability across -40°C to +85°C and up to 150mA load. Using 1µF - sufficient for ≥2.5V outputs - risks oscillation at 1.5V due to phase margin degradation.
How does the BP pin function in the MAX8877EUK15+ and what capacitor value is recommended?
The BP pin in the MAX8877EUK15+ connects internally to the 1.25V bandgap reference through a 200kΩ resistor, forming a low-pass filter with an external capacitor to suppress reference noise. A 0.01µF ceramic capacitor is recommended: larger values reduce noise marginally but increase startup time and shutdown exit delay, with no benefit beyond 0.1µF.
Is the MAX8877EUK15+ pin-compatible with the industry-standard '2982 regulator?
Yes, the MAX8877EUK15+ is explicitly designed as a pin-compatible upgrade to the industry-standard '2982 family. It shares identical SOT23-5 pinout (IN, GND, SHDN, BP, OUT), enabling direct replacement in existing designs while delivering improved dropout voltage (165mV vs. typical 300mV) and lower output noise (30µVRMS vs. ~100µVRMS).
MAX8877EUK15+ 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):
- 1.5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.165V @ 150mA
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- 180 µA
- Current - Supply (Max):
- -
- PSRR:
- 63dB (10kHz)
- Control Features:
- Current Limit, 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:
- SOT-23-5
MAX8877EUK15+ FAQ
1.How can I place an order for MAX8877EUK15+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8877EUK15+ 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 MAX8877EUK15+ reliable?
The price and inventory of MAX8877EUK15+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8877EUK15+ is usually 5 days.
3.What payment methods are accepted for MAX8877EUK15+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8877EUK15+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8877EUK15+?
MAX8877EUK15+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8877EUK15+ 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 MAX8877EUK15+?
For technical support, including MAX8877EUK15+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8877EUK15+ requirements.
6.How does Aetrix verify that MAX8877EUK15+ is sourced from the original manufacturer or authorized distributors?
All MAX8877EUK15+ 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 MAX8877EUK15+ meets industry standards.
7.What is the process for return or replacement of MAX8877EUK15+?
All MAX8877EUK15+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX8877EUK15+, 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 MAX8877EUK15+ part is unused and in its original packaging.
Return procedure for MAX8877EUK15+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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