My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX8891EXK19+T
- Part No.:
- MAX8891EXK19+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
MAX8891EXK19+T.pdf
- Description:
- IC REG LINEAR 1.9V 150MA SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,513
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
The MAX8891EXK19+T from Maxim Integrated is a fixed-output, low-dropout linear regulator delivering 150mA with 120mV dropout at 120mA load, 40µA ground current, and ±3% output voltage accuracy over temperature. It features a p-channel MOSFET pass element, operates from 2V to 6V input, and is preset to 1.9V output-optimized for space-constrained battery-powered portable electronics.
For engineers reviewing the MAX8891EXK19+T datasheet, MAX8891EXK19+T pinout, MAX8891EXK19+T application, or MAX8891EXK19+T equivalent, key selection criteria include dropout performance at light-to-moderate loads, PSRR of 65dB at 10kHz, stability with 1µF ceramic capacitors, and shutdown current below 1µA-critical for ultra-low-power system design.
Technical Context
The MAX8891EXK19+T implements a bandgap-referenced error amplifier driving an internal p-channel MOSFET pass transistor (RDS(ON) ≈ 1Ω), enabling low quiescent current and minimal dropout across its 1.9V output range. Its architecture eliminates base-drive losses inherent in PNP-based LDOs, sustaining 40µA ground current independent of load up to 80mA.
Shutdown control is implemented via a dedicated SHDN pin with logic-low threshold ≤0.4V and bias current ≤0.01µA at +85°C, enabling deep-sleep power states. Thermal protection activates at +160°C with 10°C hysteresis, and current limiting holds output at 200mA during overload-ensuring robust operation without external protection circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.9V (factory-preset; no external feedback required) |
| Max Output Current | 150mA continuous-supports moderate-power RF ICs and microcontrollers |
| Dropout Voltage | 120mV at 120mA-enables operation down to VIN = 2.09V with full regulation |
| Ground Current | 40µA typical at light load-minimizes battery drain in standby mode |
| PSRR | 65dB at 10kHz-suppresses switching noise from adjacent DC-DC converters |
| Output Accuracy | ±3% over -40°C to +85°C-ensures reliable logic-level compliance for 1.8V/1.9V I/O domains |
| Capacitor Requirement | Stable with 1µF ceramic on IN and OUT-reduces BOM count and PCB area vs. tantalum alternatives |
| Shutdown Current | <1µA-enables multi-week shelf life in battery-backed systems |
Pinout & Package
MAX8891EXK19+T is housed in a 5-pin SC70 package (2.0mm × 1.25mm × 0.95mm height), optimized for high-density portable layouts. The package uses JEDEC-standard SC70-5 footprint with exposed pad not electrically connected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - IN | Unregulated Input Supply | Accepts 2V–6V input; requires 1µF ceramic bypass to GND for stability and noise filtering |
| 2 - GND | Ground Reference & Thermal Path | Serves as primary return path and primary heat conduction route-must connect to large copper pour |
| 3 - SHDN | Active-Low Enable Control | Pull ≤0.4V to disable regulator; draws <0.01µA-compatible with GPIOs of ultra-low-power MCUs |
| 4 - N.C. | No Internal Connection | Not bonded; must be left floating-no routing or soldering required |
| 5 - OUT | Regulated 1.9V Output | Delivers up to 150mA; bypassed with 1µF ceramic to GND; high-impedance when SHDN asserted |
Key Features
| Feature | Design Value |
|---|---|
| p-Channel MOSFET Pass Element | Eliminates base-drive current loss-maintains 40µA ground current across 0–80mA load range |
| 1µF Ceramic Stability | Enables use of small, low-ESR, high-reliability MLCCs instead of larger, aging-prone tantalum capacitors |
| 65dB PSRR @ 10kHz | Rejects ripple from switch-mode power supplies feeding shared input rails in multi-rail systems |
| Thermal Shutdown with Hysteresis | Auto-recovers after 10°C cooldown-prevents latch-up during transient overloads without system intervention |
| 120mV Dropout @ 120mA | Extends usable battery life in single-cell Li-ion (2.8V–4.2V) and NiMH (2.4V–3.6V) applications |
| ±3% Output Accuracy | Guarantees 1.84V–1.96V output across full temp/load range-meets 1.9V core rail tolerance for select ASICs |
Applications
| Bluetooth Audio Accessories | Digital Camera Sensor Bias |
|---|---|
Use Scenario: Powering Bluetooth audio codecs and RF transceivers in wireless earbuds and speaker docks. IC Role / Device Role / Timing Role: Primary 1.9V supply for analog front-end and digital baseband sections. Use Value: Low 120mV dropout extends runtime from partially discharged Li-ion cells; 65dB PSRR prevents audible switching noise coupling into audio paths. | Use Scenario: Providing clean, stable bias for CMOS image sensor analog signal chains. IC Role / Device Role / Timing Role: Low-noise 1.9V analog rail decoupled from noisy digital subsystems. Use Value: 230µV RMS output noise and 1µF ceramic stability ensure minimal fixed-pattern noise and consistent ADC reference integrity. |
| Portable Medical Sensors | Industrial Handheld Terminals |
Use Scenario: Powering precision analog front-ends in wearable ECG/SpO₂ monitors with multi-year battery life targets. IC Role / Device Role / Timing Role: Ultra-low-quiescent 1.9V supply enabling <1µA shutdown state and rapid wake-up response. Use Value: 40µA ground current at light load and sub-1µA shutdown current directly enable >3-year shelf life on coin-cell batteries. | Use Scenario: Regulating 1.9V for FPGA configuration memory and low-voltage I/O banks in ruggedized handheld scanners. IC Role / Device Role / Timing Role: Robust, thermally protected local regulator tolerant of industrial ambient temperature swings. Use Value: Thermal shutdown at +160°C with 10°C hysteresis prevents field failures under sustained high-temperature operation in sealed enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Torex XC6206P192MR-G | 1.9V fixed, 150mA, 250mV dropout at 100mA, 1µA quiescent current | Higher dropout limits usable input range; lower IQ benefits ultra-low-power sleep modes | Select when lowest possible shutdown current is prioritized over dropout performance |
| Analog Devices ADP160ACBZ-1.9-R7 | 1.9V fixed, 150mA, 195mV dropout at 150mA, 550nA shutdown current, 1µF stable | Higher dropout and slightly higher ground current; superior shutdown leakage | Select when sub-1µA shutdown is mandatory and 195mV dropout is acceptable in system margin |
Compared with the MAX8891EXK19+T, the XC6206P192MR-G trades 135mV higher dropout for 39µA lower ground current, while the ADP160ACBZ-1.9-R7 offers better shutdown leakage but sacrifices 75mV in dropout-making the MAX8891EXK19+T optimal where input headroom is constrained and moderate quiescent current is acceptable.
Availability
MAX8891EXK19+T is available at Aetrix Electronics and suitable for Bluetooth accessories, portable medical sensors, digital camera modules, and industrial handheld terminals requiring stable component supply across extended production lifecycles.
Supply support for MAX8891EXK19+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 demanding industrial, communications, and consumer applications.
The MAX8891/MAX8892 product line was designed specifically for space-constrained, battery-powered portable electronics requiring ultra-low quiescent current, minimal dropout, and guaranteed 150mA output-all in the smallest possible SC70 footprint.
FAQ
What output voltage does the MAX8891EXK19+T deliver?
The MAX8891EXK19+T delivers a factory-preset 1.9V output voltage with ±3% accuracy over the full -40°C to +85°C operating temperature range. This fixed output eliminates the need for external feedback resistors, simplifying layout and reducing BOM count. The 1.9V rail is specifically targeted at low-voltage analog circuits and I/O domains in portable devices where precise, stable bias is critical.
What is the dropout voltage specification for MAX8891EXK19+T at full load?
The MAX8891EXK19+T exhibits a dropout voltage of 120mV at 120mA load current, measured at +25°C. At 150mA maximum output, dropout increases to approximately 135mV for 1.9V output per datasheet characterization. This low dropout enables operation from partially discharged single-cell Li-ion batteries (down to ~2.09V input) while maintaining tight regulation-key for extending runtime in portable applications.
Does MAX8891EXK19+T require external feedback components?
No, the MAX8891EXK19+T does not require external feedback components. As a member of the MAX8891 family, it features an internally trimmed resistor divider that sets the output to 1.9V. Pin 4 is designated N.C. (No Connection) and must remain unconnected. This contrasts with the MAX8892 variant, which uses Pin 4 as FB (feedback) and requires two external resistors to set the output voltage.
How much quiescent current does MAX8891EXK19+T draw in normal operation?
The MAX8891EXK19+T draws 40µA of ground current (quiescent current) under normal operation with no load and at +25°C. This value remains stable across load currents up to 80mA and varies only modestly with temperature-reaching ~45µA at +85°C. Its p-channel MOSFET pass transistor architecture eliminates base-drive losses, making this quiescent current significantly lower than comparable PNP-based LDOs.
What capacitor values are required for stable operation of MAX8891EXK19+T?
The MAX8891EXK19+T is stable with a minimum of 1µF ceramic capacitor on both the input (IN) and output (OUT) pins. X7R or X5R dielectric MLCCs are recommended for full-temperature-range stability; Z5U or Y5V types may require ≥2.2µF at temperatures below -10°C. Larger capacitance improves PSRR and transient response but is not required for basic stability-enabling compact, low-cost designs.
MAX8891EXK19+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 1.9V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- -
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- 40 µA
- Current - Supply (Max):
- -
- PSRR:
- 65dB (10kHz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-5
MAX8891EXK19+T FAQ
1.How can I place an order for MAX8891EXK19+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8891EXK19+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 MAX8891EXK19+T reliable?
The price and inventory of MAX8891EXK19+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8891EXK19+T is usually 5 days.
3.What payment methods are accepted for MAX8891EXK19+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8891EXK19+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8891EXK19+T?
MAX8891EXK19+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8891EXK19+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 MAX8891EXK19+T?
For technical support, including MAX8891EXK19+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8891EXK19+T requirements.
6.How does Aetrix verify that MAX8891EXK19+T is sourced from the original manufacturer or authorized distributors?
All MAX8891EXK19+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 MAX8891EXK19+T meets industry standards.
7.What is the process for return or replacement of MAX8891EXK19+T?
All MAX8891EXK19+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX8891EXK19+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 MAX8891EXK19+T part is unused and in its original packaging.
Return procedure for MAX8891EXK19+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX8891EXK19+T Tags
-
MIC5504-1.8YM5-TR
Microchip Technology
-
MIC5504-3.3YM5-TR
Microchip Technology
-
MIC5365-3.0YC5-TR
Microchip Technology
-
MIC5365-1.8YC5-TR
Microchip Technology
-
MIC5365-2.5YC5-TR
Microchip Technology
-
MIC5365-3.3YC5-TR
Microchip Technology
-
MIC5365-3.3YD5-TR
Microchip Technology
-
MIC5317-3.3YM5-TR
Microchip Technology
-
TLV1117LV33DCYR
Texas Instruments
-
MIC5317-3.3YMT-TZ
Microchip Technology
-
MIC5528-3.3YMT-TR
Microchip Technology
-
TLV75801PDRVR
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
