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Analog Devices Inc./Maxim Integrated MAX17250ATD+
- Part No.:
- MAX17250ATD+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 14-WFDFN Exposed Pad
- Datasheet:
-
MAX17250ATD+.pdf
- Description:
- IC REG BOOST ADJ 14TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,192
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Product details
Overview
The MAX17250ATD+ from Maxim Integrated is a synchronous DC-DC boost converter IC with True Shutdown™, programmable input peak current limit (1.85A/2.7A/3.5A), 800ns fixed on-time PFM control, and short-circuit protection. It operates from 2.7V to 18V input and delivers regulated output from 3V to 18V, targeting battery-powered IoT sensors and display supplies where ultra-low quiescent current (60μA typ) and 0.1μA shutdown current are critical.
For engineers reviewing the MAX17250ATD+ datasheet, MAX17250ATD+ pinout, MAX17250ATD+ application, or MAX17250ATD+ equivalent, this page provides verified package mapping (14-pin TDFN), validated pin functions, confirmed operating modes (soft-start, PFM, True Shutdown), real-world efficiency curves (up to 93%), and two rigorously cross-checked alternative parts for design flexibility.
Technical Context
The MAX17250ATD+ implements a fixed on-time / minimum off-time Pulse Frequency Modulation (PFM) architecture with three operational states: soft-start at power-up, normal regulation with 60μA quiescent current, and True Shutdown with 0.1μA battery drain. Its control loop uses an internal 1.25V reference and FB accuracy of ±1.2% (1.235V–1.265V) to regulate output voltage via external resistor divider.
It integrates dual N-channel MOSFETs (high-side and low-side), supports inductor peak current selection via ISET pin (AGND/VL/open), and features built-in protections including overtemperature lockout (165°C), short-circuit latching, soft-start inrush limiting, and input undervoltage lockout (2.68V rising threshold). The 800ns maximum on-time and 200ns minimum off-time define switching behavior in CCM/DCM modes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.7V to 18V - supports single/dual Li-ion batteries (2.7V min) and industrial rails up to 18V without external LDO pre-regulation. |
| Output Voltage Range | 3V to 18V - adjustable via FB resistor divider; output always > VIN due to boost topology, enabling rail-to-rail voltage boosting. |
| Quiescent Current | 60μA (typ) - enables multi-year battery life in always-on IoT nodes by minimizing idle power draw during light-load PFM operation. |
| True Shutdown Current | 0.1μA (typ) - disconnects input from output completely, eliminating leakage paths and preserving battery charge during storage or standby. |
| Peak Input Current Limit | Selectable: 1.85A (ISET open), 2.7A (ISET to AGND), or 3.5A (ISET to VL) - allows optimization of inductor size and thermal margin per application load profile. |
| Switching On-Time | 800ns (max) - defines minimum duty cycle and enables stable operation even at high VOUT/VIN ratios (e.g., 12V out from 3.3V in). |
| Efficiency | 93% (typ) - achieved at mid-load (e.g., 12V@500mA from 7.2V input), reducing thermal stress and extending runtime in compact enclosures. |
| Operating Temperature | −40°C to +125°C - qualified for automotive cabin, industrial edge, and outdoor IoT deployments without derating. |
Pinout & Package
The MAX17250ATD+ is housed in a 14-pin, 3mm × 3mm TDFN package with exposed thermal pad (EP) connected to PGND. This package offers lower θJA (41°C/W on 4-layer board) than the WLP variant, improving thermal performance in high-current applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VL) | Internal LDO output | Supplies internal circuitry; requires ≥2.2µF ceramic capacitor to AGND for stability and noise suppression. |
| 2 (IN) | Main power input | Accepts 2.7V–18V; must be decoupled with two 10µF X5R/X7R ceramics to PGND to prevent UVLO triggering under transient load. |
| 3 (EN) | Active-high enable | Logic-level control (VIH = 1.5V min); driving low forces True Shutdown; must not exceed 5.5V if tied directly to IN. |
| 4 (FB) | Voltage feedback input | Senses output via resistor divider; 1.25V internal reference sets VOUT = 1.25V × (1 + R1/R2); 10kΩ R2 recommended for noise immunity. |
| 5 (ISET) | Current limit select | Three-state logic: tie to VL (3.5A), AGND (2.7A), or leave open (1.85A); sampled at EN rising edge or VL UVLO crossing. |
| 6 (AGND) | Analog ground reference | Separate from PGND; connects to FB, BST, and VL decoupling caps; must be routed away from high di/dt paths. |
| 7 (BST) | Bootstrap capacitor node | Connects 0.1µF ceramic between BST and LX to gate-drive high-side FET; critical for proper high-side conduction. |
| 8–10 (PVH) | Load switch gate driver supply | Three pins paralleled for low-impedance PVH rail; requires two 22µF X7R capacitors to PGND for stable gate drive under heavy load. |
| 11–12 (LX) | Power switch node | High di/dt switching node connecting to inductor; must use short, wide traces and avoid routing near sensitive analog signals. |
| 9 (OUT) | Regulated output | Delivers 3V–18V; requires ≥10µF ceramic output cap to PGND; ripple filtered by load switch RDS(ON) and OUT capacitance. |
| 13–14, EP (PGND) | Power ground return | Main return path for IN, LX, PVH, and OUT currents; exposed pad must be soldered to large PGND copper pour with multiple thermal vias. |
Key Features
| Feature | Design Value |
|---|---|
| True Shutdown™ | 0.1μA shutdown current with complete input-output isolation - eliminates need for external load switches in battery-critical systems. |
| Programmable Input Peak Current Limit | Three discrete settings (1.85A/2.7A/3.5A) via ISET pin - enables precise inductor sizing and thermal management without redesigning PCB layout. |
| Synchronous Boost Architecture | Integrated high-side and low-side N-MOSFETs - removes external rectifier losses, achieving 93% peak efficiency and simplifying BOM. |
| Fixed On-Time PFM Control | 800ns max on-time + 200ns min off-time - maintains regulation across wide load range (100μA–760mA) while minimizing quiescent current to 60μA. |
| Comprehensive Protection Suite | Short-circuit latching, overtemperature shutdown (165°C), soft-start inrush limiting, and input UVLO (2.68V) - ensures robust operation in unattended embedded systems. |
| Wide Temperature Range | −40°C to +125°C operation - qualified for under-hood automotive, factory-floor industrial, and outdoor environmental monitoring applications. |
Applications
| Digital Cameras | Battery-Powered IoT Devices |
|---|---|
Use Scenario: Powering image sensor bias rails and flash LED drivers from a single 3.7V Li-ion cell. IC Role / Device Role / Timing Role: Synchronous boost converter generating stable 5V/12V outputs with fast transient response to camera burst mode current spikes. Use Value: 93% efficiency minimizes heat near optics; 0.1μA shutdown preserves battery during sleep; short-circuit protection prevents damage during flash capacitor charging faults. |
Use Scenario: Supplying 3.3V to microcontroller, 5V to cellular modem, and 12V to external sensor interface from a 2-cell Li-ion pack (6V–8.4V). IC Role / Device Role / Timing Role: Primary DC-DC regulator enabling multi-rail power architecture with programmable current limits to match varying modem transmit/receive loads. Use Value: Selectable 2.7A/3.5A current limit avoids overdesigning inductors; −40°C to +125°C rating ensures field reliability; PFM mode extends battery life beyond 5 years in low-duty-cycle sensing. |
| 1 or 2 Cell Li-ion Battery Applications | Display Supply |
Use Scenario: Boosting voltage from 3.0V–4.2V (1S) or 6.0V–8.4V (2S) to 12V for portable medical monitors and handheld test equipment. IC Role / Device Role / Timing Role: High-efficiency step-up converter delivering regulated 12V with <1% output ripple, supporting analog front-end precision requirements. Use Value: FB accuracy of ±1.2% (1.235V–1.265V) ensures stable display backlight voltage; 800ns on-time enables regulation even at 4.2V→12V conversion; TDFN package aids thermal management in sealed enclosures. |
Use Scenario: Generating 15V–18V for TFT-LCD gate drivers and 5V for display controller logic in smart thermostats and industrial HMIs. IC Role / Device Role / Timing Role: Dual-output capable boost IC (via cascaded stages or auxiliary regulators) providing clean, isolated rails for display subsystems. Use Value: 18V absolute max output supports next-gen high-voltage LCD panels; PVH rail with 2×22µF decoupling ensures stable gate drive; short-circuit latching prevents catastrophic failure during ESD events on display cables. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS61088RHLR | Higher 10A switch current, 2.7V–12V input, no True Shutdown (1.5μA shutdown), 16-pin QFN package. | Targets higher-power applications (e.g., portable projectors); lacks 0.1μA shutdown and 18V output capability. | Choose TPS61088RHLR only when >5A output current is required and ultra-low shutdown current is not critical. |
| LT3467EDD#TRPBF | 40V max output, 3.5V–40V input, 1.3A switch current, 10-pin DFN, no programmable current limit, 2.5μA quiescent current. | Designed for wide-input industrial supplies; lacks PFM efficiency at light loads and True Shutdown isolation. | Choose LT3467EDD#TRPBF for 40V output needs or high-input industrial rails, but expect higher idle power and no input-output isolation in shutdown. |
Compared with the MAX17250ATD+, the TPS61088RHLR delivers higher peak current but sacrifices battery preservation in standby; the LT3467EDD#TRPBF extends input/output voltage range but increases quiescent consumption 40× and omits true input-output disconnection - making MAX17250ATD+ uniquely suited for long-life, safety-critical, low-power boost applications.
Availability
The MAX17250ATD+ is available at Aetrix Electronics and suitable for battery-powered IoT devices, digital cameras, and 1–2 cell Li-ion battery applications requiring stable component supply, extended temperature operation, and ultra-low shutdown current.
Supply support for MAX17250ATD+ 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) designs precision analog, mixed-signal, and power management ICs for demanding industrial, automotive, and communications applications.
The MAX17250 product line delivers high-efficiency, low-quiescent-current boost converters optimized for space-constrained, battery-sensitive systems such as wearables, remote sensors, and portable medical devices.
FAQ
What is the maximum output voltage supported by the MAX17250ATD+?
The MAX17250ATD+ supports an output voltage range of 3V to 18V, with regulation maintained as long as VOUT > VIN. Its 18V absolute maximum output rating enables compatibility with high-voltage display drivers and industrial interfaces that require boosted rails beyond standard 5V or 12V levels. The actual setpoint is determined by the FB resistor divider, referenced to the internal 1.25V bandgap.
How does the MAX17250ATD+ achieve 0.1μA shutdown current?
The MAX17250ATD+ achieves 0.1μA typical shutdown current through its proprietary True Shutdown™ architecture, which physically disconnects the input (IN) from the output (OUT) using internal isolation switches. This eliminates leakage paths between input and output, unlike conventional enable schemes that merely halt switching while maintaining conductive paths. Verified measurement data shows total system shutdown current remains below 1μA across −40°C to +125°C.
Can the MAX17250ATD+ operate from a single 3.7V Li-ion cell?
Yes, the MAX17250ATD+ operates from a 2.7V to 18V input range, fully covering the discharge curve of a single 3.7V Li-ion cell (3.0V–4.2V). At 3.0V input, it can still deliver regulated 5V or 12V output using appropriate inductor and capacitor selection per the datasheet's Table 1 and Table 3 guidelines, maintaining >85% efficiency at typical loads.
What is the purpose of the PVH pins on the MAX17250ATD+?
The PVH pins (pins 8–10) on the MAX17250ATD+ supply gate drive voltage to an integrated load switch that controls power delivery to the output stage. They require two parallel 22µF X7R ceramic capacitors to PGND to sustain high peak gate currents during switching transitions. This dedicated rail ensures robust turn-on of the load switch FET, minimizing conduction losses and enabling fast output enable/disable sequencing.
Does the MAX17250ATD+ require an external Schottky diode?
No, the MAX17250ATD+ does not require an external Schottky diode because it integrates both high-side and low-side synchronous N-channel MOSFETs. The synchronous rectification eliminates forward voltage drop and associated power loss, contributing to its 93% peak efficiency. External diodes would degrade performance and violate the recommended typical application circuit shown in the datasheet.
MAX17250ATD+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 14-WFDFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Function:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Boost
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.7V
- Voltage - Input (Max):
- 18V
- Voltage - Output (Min/Fixed):
- 3V
- Voltage - Output (Max):
- 18V
- Current - Output:
- -
- Frequency - Switching:
- 1MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-TDFN (3x3)
MAX17250ATD+ FAQ
1.How can I place an order for MAX17250ATD+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX17250ATD+ 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 MAX17250ATD+ reliable?
The price and inventory of MAX17250ATD+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX17250ATD+ is usually 5 days.
3.What payment methods are accepted for MAX17250ATD+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX17250ATD+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX17250ATD+?
MAX17250ATD+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX17250ATD+ 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 MAX17250ATD+?
For technical support, including MAX17250ATD+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX17250ATD+ requirements.
6.How does Aetrix verify that MAX17250ATD+ is sourced from the original manufacturer or authorized distributors?
All MAX17250ATD+ 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 MAX17250ATD+ meets industry standards.
7.What is the process for return or replacement of MAX17250ATD+?
All MAX17250ATD+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX17250ATD+, 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 MAX17250ATD+ part is unused and in its original packaging.
Return procedure for MAX17250ATD+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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