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Analog Devices Inc./Maxim Integrated MAX17250ATD+T
- Part No.:
- MAX17250ATD+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 14-WFDFN Exposed Pad
- Datasheet:
-
MAX17250ATD+T.pdf
- Description:
- IC REG BOOST ADJ 14TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:6,213
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Product details
Overview
The MAX17250ATD+T from Maxim Integrated is a synchronous DC-DC boost converter IC designed for battery-powered systems requiring high efficiency and ultra-low quiescent current. It operates from 2.7V to 18V input, delivers 3V–18V output, integrates power FETs, features True Shutdown™ (0.1μA shutdown current), and supports selectable input peak current limits of 1.85A/2.7A/3.5A - enabling compact, low-power supply rails in space-constrained IoT sensors and display modules.
For engineers reviewing the MAX17250ATD+T datasheet, MAX17250ATD+T pinout, MAX17250ATD+T application, or MAX17250ATD+T equivalent, key selection criteria include its fixed 800ns on-time PFM architecture, -40°C to +125°C operating range, TDFN-14 package thermal performance (θJA = 41°C/W on 4-layer board), and three-state ISET configuration for inductor current limiting in battery-fed step-up designs.
Technical Context
The MAX17250ATD+T implements a fixed on-time / minimum off-time Pulse Frequency Modulation (PFM) control scheme with programmable peak current sensing via the ISET pin. Its architecture enables operation in both continuous conduction mode (CCM) and discontinuous conduction mode (DCM), dynamically adjusting switching frequency based on load - delivering 60μA typical quiescent current at light loads while maintaining >93% peak efficiency.
True Shutdown™ disconnects input from output using internal isolation, reducing system battery drain to 0.1μA typ. Protection includes short-circuit latching, overtemperature lockout at 165°C, soft-start inrush control, and input undervoltage lockout (2.68V rising threshold with 100mV hysteresis).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.7V to 18V - supports single/dual Li-ion batteries and wide-input industrial rails without external pre-regulation. |
| Output Voltage Range | 3V to 18V - adjustable via FB resistor divider; output always exceeds VIN (boost-only operation). |
| Quiescent Current | 60μA typ - enables multi-year battery life in always-on IoT endpoints with microamp-level standby loads. |
| Shutdown Current | 0.1μA typ - minimizes battery leakage during deep sleep or storage, critical for sealed portable devices. |
| Peak Inductor Current Limit | Selectable: 1.85A (ISET open), 2.7A (ISET to AGND), or 3.5A (ISET to VL) - allows optimization of inductor size and transient response per application. |
| Switch On-Time | Fixed 800ns max - ensures stable regulation at low input voltages and defines minimum achievable duty cycle. |
| Operating Temperature | -40°C to +125°C - qualified for automotive cabin, industrial control, and outdoor sensor environments. |
| Package Thermal Resistance | θJA = 41°C/W (4-layer board) - enables 1.95W power dissipation at TA = 70°C before derating, supporting higher output currents than WLP variant. |
Pinout & Package
The MAX17250ATD+T is housed in a 14-pin, 3mm × 3mm TDFN package with exposed thermal pad (EP), compatible with standard reflow processes and offering superior thermal performance versus the WLP variant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN | Input voltage supply | Accepts 2.7V–18V; requires dual 10µF ceramic decoupling to PGND near pin to suppress ripple-induced UVLO trips. |
| EN | Active-high enable | Drives device into True Shutdown when low; must be ≥1.5V to enable; avoid direct connection to IN if VIN > 5.5V. |
| FB | Feedback input | Senses output voltage via resistor divider; internal 1.25V reference; ±1.25% accuracy enables precise VOUT regulation. |
| ISET | Current limit select | Three-state logic: tie to VL (3.5A), AGND (2.7A), or leave open (1.85A); sampled at power-up or EN rising edge. |
| LX | Switching node | Connects to inductor; handles up to ±2.58ARMS; requires low-inductance layout to minimize EMI and switching losses. |
| OUT | Regulated output | Delivers 3V–18V; requires ≥10µF ceramic capacitor to PGND; output ripple filtered by internal load switch RDS(ON). |
| PVH | Load switch gate driver supply | Supplies high-side gate drive; requires two 22µF capacitors to PGND; decouples high di/dt gate switching currents. |
| BST | Bootstrap capacitor connection | Connects 0.1µF capacitor to LX; provides floating supply for high-side FET gate drive during switching cycles. |
| VL | Internal LDO output | 3.35V nominal supply for internal circuitry; requires ≥2.2µF capacitor to AGND; UVLO threshold 2.145V (falling). |
| AGND | Analog ground reference | Separate from PGND; connects FB, BST, VL, ISET, EN, FB; must be routed with minimal noise coupling. |
| PGND | Power ground return | High-current return path for IN, LX, PVH, OUT; connects to EP; must be solid copper pour with multiple thermal vias. |
| EP | Exposed thermal pad | Internally connected to PGND; mandatory for thermal performance; requires ≥6 thermal vias to inner PGND plane. |
Key Features
| Feature | Design Value |
|---|---|
| True Shutdown™ | 0.1μA shutdown current with complete input-output isolation - eliminates need for external load switches in battery backup paths. |
| Programmable Input Peak Current Limit | Three discrete settings (1.85A/2.7A/3.5A) via ISET pin - enables optimal inductor selection and transient response tuning without changing BOM. |
| Fixed On-Time PFM Control | 800ns max on-time + 200ns min off-time - delivers high light-load efficiency (60μA IQ) while maintaining stability across wide VIN/VOUT ratios. |
| Integrated Power FETs | Low RDS(ON): 95mΩ (high-side) and 200mΩ (low-side) at ISET = VL - reduces external component count and PCB area vs. controller-only solutions. |
| Robust Protection Suite | Short-circuit latching, overtemperature lockout (165°C), soft-start, and input UVLO (2.68V) - prevents damage during fault conditions without external supervision. |
| Wide Temperature Operation | -40°C to +125°C junction range - supports deployment in under-hood automotive, industrial PLCs, and outdoor wireless nodes. |
Applications
| Digital Cameras | Battery-Powered IoT Devices |
|---|---|
Use Scenario: Powering image sensor bias rails and flash LED drivers from single-cell Li-ion batteries. IC Role / Device Role / Timing Role: Boost converter providing regulated 5V/8.4V outputs with fast transient response to handle burst-mode sensor readouts. Use Value: True Shutdown™ extends standby time between shots; selectable current limit avoids inductor saturation during flash pulses. |
Use Scenario: Supplying 3.3V/5V rails for BLE/Wi-Fi SoCs and environmental sensors in coin-cell or AA-powered nodes. IC Role / Device Role / Timing Role: Primary step-up regulator enabling operation down to 2.7V battery voltage while minimizing self-consumption. Use Value: 60μA quiescent current preserves battery capacity over multi-year deployments; compact TDFN-14 eases integration into small form factors. |
| 1 or 2 Cell Li-ion Battery Applications | Display Supply |
Use Scenario: Generating stable 12V backlight or 5V logic supply from 3.0V–8.4V battery packs in handheld medical or test equipment. IC Role / Device Role / Timing Role: High-efficiency boost stage with integrated FETs eliminating external MOSFETs and gate drivers. Use Value: 93% peak efficiency reduces thermal load; wide 2.7V–18V input accommodates full battery discharge curve without brownouts. |
Use Scenario: Delivering 12V–18V for TFT-LCD or OLED display bias supplies in portable instrumentation and wearables. IC Role / Device Role / Timing Role: Adjustable boost converter with precise FB accuracy (±1.25%) ensuring consistent brightness and contrast. Use Value: Programmable current limit prevents overcurrent during display initialization; PVH rail supports high-side load switch for panel power gating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX17250ANC+ | Same die, 12-bump WLP package (1.72mm × 1.49mm); θJA = 72.8°C/W (4-layer); lower RMS current rating (±3.2A vs. ±2.58A). | Better suited for ultra-compact, low-power wearable sensors where PCB area is constrained but thermal budget is relaxed. | Select MAX17250ANC+ only when board space is < 2.6mm² and peak load current ≤ 1.5A; use MAX17250ATD+T for higher current or thermally demanding layouts. |
| TPS610992RTER | TI part; 2.7V–5.5V input; 3.3V/5V fixed outputs; 300nA shutdown; no programmable current limit; smaller 6-pin WSON package. | Targeted at low-voltage, fixed-output applications (e.g., MCU core rails) - lacks wide-VIN flexibility and adjustable current limiting. | Choose TPS610992RTER only for sub-5.5V systems needing lowest possible shutdown current; MAX17250ATD+T remains preferred for 2.7V–18V adaptability and design flexibility. |
Compared with MAX17250ANC+, the MAX17250ATD+T offers 55% lower thermal resistance and higher RMS current capability, making it suitable for sustained 0.7A+ loads; versus TPS610992RTER, it provides triple the input voltage range and field-programmable current limiting - critical for variable battery chemistries and dynamic load profiles.
Availability
The MAX17250ATD+T is available at Aetrix Electronics and suitable for battery-powered IoT devices, digital cameras, and 1–2 cell Li-ion applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX17250ATD+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 semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, automotive, and communications markets.
The MAX17250 product line delivers highly integrated, low-quiescent-current boost converters optimized for space- and energy-constrained battery-operated systems - emphasizing True Shutdown™, programmable protection, and thermal robustness in miniature packages.
FAQ
What is the maximum output current supported by the MAX17250ATD+T in a typical 7.2V-to-12V application?
The MAX17250ATD+T supports up to 0.76A output current in a 7.2V-to-12V application with 92% efficiency and ISET set to VL (3.5A peak limit), as confirmed in the Typical Operating Characteristics (Figure toc05). This value assumes proper thermal design using the TDFN package's 41°C/W θJA on a 4-layer board and accounts for 30% margin below the selected current limit. Exceeding this requires verifying junction temperature rise against the 125°C limit.
How does the MAX17250ATD+T achieve 0.1μA shutdown current, and what circuitry enables True Shutdown™?
The MAX17250ATD+T achieves 0.1μA shutdown current by fully disconnecting the input from the output through internal isolation switches during True Shutdown™ mode - verified in Absolute Maximum Ratings and Electrical Characteristics tables. When EN is low, both high-side and low-side power FETs are turned off, and the PVH and BST charge pumps are disabled, eliminating all conductive paths between IN and OUT. This behavior is distinct from standard enable/disable modes that retain leakage paths.
Can the MAX17250ATD+T regulate output voltages below the input voltage?
No, the MAX17250ATD+T is a dedicated boost (step-up) converter and cannot regulate output voltages below the input voltage. Its architecture requires VOUT > VIN to operate, as stated in the General Description ("output voltage range 3V to 18V, > VIN") and Functional Diagram. If VIN exceeds the target VOUT, the output clamps to approximately VIN minus a diode drop (~0.2V–0.7V), and regulation ceases - making it unsuitable for buck or buck-boost applications.
What are the recommended capacitor types and values for the PVH and OUT pins of the MAX17250ATD+T?
For the PVH pin, use two 22µF/25V X7R ceramic capacitors connected to PGND (per Table 3 for 8V–12V outputs). For the OUT pin, use one 10µF/25V X7R ceramic capacitor to PGND. These values ensure stable gate drive for the internal load switch and sufficient output filtering. Ceramic dielectrics (X5R/X7R) are mandatory due to their low ESR; tantalum or electrolytic capacitors are not recommended as they increase ripple and reduce reliability.
Is the MAX17250ATD+T pin-compatible with other variants in the MAX17250 family, such as the MAX17250ANC+?
No, the MAX17250ATD+T is not pin-compatible with the MAX17250ANC+ - they use different packages (14-pin TDFN vs. 12-bump WLP) and have distinct pinouts, land patterns, and thermal pad configurations. The TDFN variant has dedicated PGND pins (13, 14, EP) and separate LX pins (11, 12), while the WLP uses a 4×3 bump array with shared functions. PCB layout and footprint must be redesigned when switching between these variants.
MAX17250ATD+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 14-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- 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+T FAQ
1.How can I place an order for MAX17250ATD+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX17250ATD+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 MAX17250ATD+T reliable?
The price and inventory of MAX17250ATD+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX17250ATD+T is usually 5 days.
3.What payment methods are accepted for MAX17250ATD+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX17250ATD+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX17250ATD+T?
MAX17250ATD+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX17250ATD+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 MAX17250ATD+T?
For technical support, including MAX17250ATD+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX17250ATD+T requirements.
6.How does Aetrix verify that MAX17250ATD+T is sourced from the original manufacturer or authorized distributors?
All MAX17250ATD+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 MAX17250ATD+T meets industry standards.
7.What is the process for return or replacement of MAX17250ATD+T?
All MAX17250ATD+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX17250ATD+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 MAX17250ATD+T part is unused and in its original packaging.
Return procedure for MAX17250ATD+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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