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Analog Devices Inc./Maxim Integrated MAX17651AZT+
- Part No.:
- MAX17651AZT+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
MAX17651AZT+.pdf
- Description:
- IC REG LIN POS ADJ 100MA TSOT23
- Quantity:
- Payment:
- Shipping:
Inventory:2,445
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Product details
Overview
The MAX17651AZT+ from Analog Devices is an ultra-low quiescent current, high-voltage linear regulator designed for industrial and battery-powered systems. It operates from 4V to 60V input, delivers up to 100mA load current, maintains ±2% feedback voltage accuracy over temperature, features a 0.6V reference voltage, and includes an open-drain PGOOD pin for output monitoring in utility meters and remote sensors.
For engineers reviewing the MAX17651AZT+ datasheet, MAX17651AZT+ pinout, MAX17651AZT+ application, or MAX17651AZT+ equivalent, key selection considerations include its 8μA no-load quiescent current, 560mV dropout at 100mA, thermal shutdown at 165°C, EN pin with 2V rising threshold, and compatibility with 4.7μF ceramic output capacitors in compact TSOT packages.
Technical Context
The MAX17651AZT+ integrates a precision 0.6V bandgap reference, current-limited pass FET driver, and thermal protection circuitry in a BiCMOS process. Its feedback loop regulates output via external resistor divider, with PGOOD assertion based on 89.5–94.5% VFB thresholds and hysteresis of 2.5%.
EN input withstands up to VIN + 0.3V, enabling direct connection to IN for always-on operation. The device implements foldback current limiting (140mA typical) and thermal cycling with 15°C hysteresis to sustain safe operation under continuous overload or short-circuit conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4V to 60V - supports wide-range industrial rails and multi-cell battery inputs without pre-regulation |
| Quiescent Current | 8μA at no load - enables >10-year battery life in low-duty-cycle remote sensors |
| Output Current | 100mA max - sufficient for powering microcontrollers, ADCs, and transceivers in post-regulator applications |
| Feedback Voltage Accuracy | ±2% over -40°C to +125°C - ensures stable regulation across harsh industrial ambient conditions |
| Dropout Voltage | 560mV at 100mA - allows usable output headroom down to ~4.56V when input is 5.12V |
| PGOOD Threshold | 92% VFB rising / 89.5% VFB falling - provides clean power-good signaling with 2.5% hysteresis for system sequencing |
| Thermal Shutdown | 165°C junction with 15°C hysteresis - protects against sustained overloads while permitting controlled recovery |
Pinout & Package
MAX17651AZT+ uses the 6-lead TSOT package (Package Code Z6+1, Outline 21-0114), with exposed pad not present. Thermal resistance θJA = 110°C/W on four-layer board.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN | Power supply input | Accepts 4V–60V; requires 0.1μF ceramic decoupling capacitor placed adjacent to pin |
| 2 EN | Active-high enable | Logic-level input; 2V rising threshold; tolerates up to VIN + 0.3V; connects to IN for always-on operation |
| 3 GND | Ground reference | Primary return path for input/output currents and internal bias; must connect to low-impedance ground plane |
| 4 FB | Feedback node | Connects to resistor divider between VOUT and GND; sets output from 0.6V to 58V using 0.6V internal reference |
| 5 PGOOD | Open-drain power-good indicator | Active-low signal pulled high externally; asserts low if VFB falls below 89.5% of setpoint |
| 6 OUT | Regulated output | Delivers up to 100mA; requires ≥4.7μF ceramic capacitor (0805) to GND for stability and transient response |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 8μA no-load operation enables multi-year battery life in wireless sensor nodes and metering devices |
| Wide adjustable output range | 0.6V to 58V output via two-resistor divider - eliminates need for multiple fixed-output regulators in BOM |
| Robust thermal protection | 165°C shutdown with 15°C hysteresis - prevents permanent damage during sustained overload or poor heatsinking |
| Stable with small ceramic capacitors | Guaranteed stability with 4.7μF 0805 ceramic output cap - reduces PCB area and eliminates electrolytic components |
| Integrated PGOOD monitoring | Open-drain output with precise 89.5–94.5% VFB thresholds - simplifies system power sequencing and fault detection |
Applications
| Utility Meters | Remote Industrial Sensors |
|---|---|
|
Use Scenario: Powering metrology ICs and RF modules in smart electricity/water/gas meters operating from 3.6V Li-SOCl₂ batteries or 24V DC mains. IC Role / Device Role / Timing Role: Primary post-regulator delivering stable 3.3V or 5V from variable input, with PGOOD confirming valid rail before MCU wake-up. Use Value: 8μA quiescent current extends battery life beyond 15 years; ±2% VFB accuracy ensures consistent ADC reference voltage across temperature. |
Use Scenario: Supplying low-power microcontrollers and LoRaWAN/ NB-IoT transceivers in unattended field deployments with extreme ambient temperature swings. IC Role / Device Role / Timing Role: Always-on LDO providing regulated rail during sleep mode; EN pin enables full shutdown during deep-sleep cycles. Use Value: 0.9μA shutdown current minimizes leakage drain; -40°C to +125°C operation guarantees reliability in outdoor enclosures without active cooling. |
| Industrial PLC I/O Modules | Post-Regulator for Switching Supplies |
|
Use Scenario: Generating isolated 5V or 12V rails for analog front-ends and digital isolators in programmable logic controller backplanes. IC Role / Device Role / Timing Role: Secondary regulator cleaning noisy switcher outputs; PGOOD signals readiness to FPGA configuration logic. Use Value: 560mV dropout at 100mA allows tight input-output margins; 42dB PSRR at 1kHz suppresses switching noise from upstream DC/DC converters. |
Use Scenario: Providing ultra-clean, low-noise bias for precision op-amps, ADC references, and clock buffers downstream of buck converters. IC Role / Device Role / Timing Role: Low-noise linear post-regulator; EN pin synchronizes with main supply enable to prevent inrush or brown-out. Use Value: 8μA IQ prevents significant efficiency penalty; ±2% VFB tolerance ensures accurate voltage setting without trimming resistors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT3015EDD#PBF | Higher 35μA IQ, 750mV dropout at 100mA, 1.2V min VOUT, no PGOOD | Lacks power-good signaling; less suitable for sequenced systems requiring rail validation | Select when PGOOD is unnecessary and higher dropout is acceptable in space-constrained designs |
| TSP54100RGTT | 15μA IQ, 600mV dropout at 100mA, 1.21V reference, no EN pin | No enable control; fixed reference limits output adjustability below 1.21V | Choose for cost-sensitive applications where EN and sub-1.2V outputs are not required |
Compared with LT3015EDD#PBF and TSP54100RGTT, the MAX17651AZT+ offers the lowest quiescent current (8μA), integrated PGOOD, and widest output adjustability (0.6V–58V), making it optimal for battery longevity and system-level power sequencing in industrial edge nodes.
Availability
MAX17651AZT+ is available at Aetrix Electronics and suitable for utility metering, remote sensor networks, and industrial PLC I/O modules requiring stable component supply with long-term lifecycle assurance.
Supply support for MAX17651AZT+ 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
Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The MAX17651AZT+ belongs to Analog Devices' high-voltage linear regulator product line, engineered specifically for ultra-low-power, wide-input industrial and battery-operated applications demanding long service life and robust thermal performance.
FAQ
What is the maximum input voltage rating for the MAX17651AZT+?
The MAX17651AZT+ has an absolute maximum input voltage rating of +70V, but its specified operational input range is 4V to 60V. Operation above 60V violates guaranteed specifications and may compromise long-term reliability, even if within absolute maximum limits. Designers should maintain VIN ≤ 60V for full parameter compliance across temperature.
Does the MAX17651AZT+ require an external capacitor on the EN pin for noise immunity?
No, the MAX17651AZT+ does not require an external capacitor on the EN pin. Its EN input has built-in hysteresis and 100nA leakage current, allowing direct connection to logic-level sources or IN. For noisy environments, a 100kΩ pull-up to IN and 100pF capacitor to GND may be added-but this is optional, not mandatory per the datasheet.
Can the MAX17651AZT+ safely regulate a 5V output from a 60V input at 100mA?
No-the MAX17651AZT+ cannot safely deliver 100mA at 5V output from 60V input. Power dissipation would be (60V – 5V) × 0.1A = 5.5W, exceeding thermal limits. With θJA = 110°C/W (TSOT), junction temperature rise would exceed 600°C. Derating calculations show maximum safe load is ~69mA for TDFN or ~26mA for TSOT under those conditions.
What is the minimum output capacitor value required for stability with the MAX17651AZT+?
The MAX17651AZT+ requires a minimum 4.7μF ceramic capacitor (0805 size) on the OUT pin for stability when VOUT ≥ 1.8V. For VOUT < 1.8V, a minimum 10μF ceramic capacitor is required. All capacitors must be low-ESR X5R/X7R types; tantalum or electrolytic capacitors are not recommended due to ESR and aging effects.
How does the PGOOD pin behave during thermal shutdown of the MAX17651AZT+?
During thermal shutdown, the MAX17651AZT+ disables the pass transistor and pulls PGOOD low-identical to its behavior during undervoltage or startup failure. PGOOD remains asserted low until both thermal recovery (junction cools by 15°C) and successful output regulation are achieved, ensuring downstream systems only resume operation after full thermal and electrical recovery.
MAX17651AZT+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6 Thin, TSOT-23-6
- Packaging:
- Strip
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Adjustable
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 60V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 58V
- Voltage Dropout (Max):
- 1.1V @ 100mA
- Current - Output:
- 100mA
- Current - Quiescent (Iq):
- 15 µA
- Current - Supply (Max):
- -
- PSRR:
- -
- Control Features:
- Enable, Power Good
- Protection Features:
- Over Current, Over Temperature, Short Circuit
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-6
MAX17651AZT+ FAQ
1.How can I place an order for MAX17651AZT+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX17651AZT+ 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 MAX17651AZT+ reliable?
The price and inventory of MAX17651AZT+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX17651AZT+ is usually 5 days.
3.What payment methods are accepted for MAX17651AZT+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX17651AZT+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX17651AZT+?
MAX17651AZT+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX17651AZT+ 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 MAX17651AZT+?
For technical support, including MAX17651AZT+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX17651AZT+ requirements.
6.How does Aetrix verify that MAX17651AZT+ is sourced from the original manufacturer or authorized distributors?
All MAX17651AZT+ 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 MAX17651AZT+ meets industry standards.
7.What is the process for return or replacement of MAX17651AZT+?
All MAX17651AZT+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX17651AZT+, 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 MAX17651AZT+ part is unused and in its original packaging.
Return procedure for MAX17651AZT+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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