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Analog Devices Inc./Maxim Integrated MAX8969EWL37+T
- Part No.:
- MAX8969EWL37+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 9-WFBGA, WLBGA
- Datasheet:
-
MAX8969EWL37+T.pdf
- Description:
- IC REG BOOST 3.7V 700MA 9WLP
- Quantity:
- Payment:
- Shipping:
Inventory:1,960
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Product details
Overview
MAX8969EWL37+T from Maxim Integrated is a 1A, 3.7V fixed-output step-up DC-DC converter in a 1.25mm × 1.25mm WLP package, designed for single-cell Li-ion battery systems. It delivers up to 1A continuous output at 3.7V with >90% efficiency (VIN = 2.5V), supports automatic track mode (ATM) with 65µA quiescent current, and integrates UVLO, short-circuit, and overtemperature protection for handheld power rails.
For engineers reviewing the MAX8969EWL37+T datasheet, MAX8969EWL37+T pinout, MAX8969EWL37+T application, or MAX8969EWL37+T equivalent, this page provides verified technical context, validated pin functions, confirmed operating modes (Boost/ATM/Track/True Shutdown), real-world efficiency curves at 3.7V output, and two rigorously cross-checked alternative parts for portable power design.
Technical Context
The MAX8969EWL37+T uses a fixed-frequency PWM architecture with 3MHz switching and automatic frequency adjustment-reducing to ~1.6MHz when VIN > 83% of VOUT_TARGET and to ~1MHz when VIN > (VOUT_TARGET − 460mV)-to maintain stable regulation across input voltages from 2.5V to 5.5V. Its voltage-positioning control scheme trades DC output impedance for reduced transient overshoot during load removal.
Three distinct operational states are hardware-controlled via EN and TREN pins: True Shutdown (1µA IQ), Track Mode (30µA IQ, pMOS current-limited switch), and Automatic Track Mode (65µA IQ, auto-transition at 95% VOUT_TARGET). In Boost Mode, synchronous rectification and 2.6A nMOS current limiting ensure ≥1A peak output with internal soft-start limiting inrush to 480mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.7V ±3.5% (3.64V–3.85V) at no load; maintains ≥3.35V under 600mA load |
| Input Voltage Range | 2.5V to 5.5V - supports full Li-ion battery discharge curve (3.0V–4.2V) |
| Max Output Current | 1A peak; 700mA continuous at VOUT = 3.7V, TA = +85°C (per datasheet min spec) |
| Quiescent Current | 45µA in skip-mode boost; 65µA in ATM; 30µA in Track; 1µA in True Shutdown |
| Switching Frequency | 3MHz nominal; dynamically scales to 1.6MHz or 1MHz to sustain duty cycle <83% near VIN ≈ VOUT |
| Protection Features | UVLO (2.2V threshold, 75mV hysteresis), thermal shutdown (+165°C), short-circuit recovery, True Shutdown™ blocking |
| Package | 9-bump WLP, 1.25mm × 1.25mm, 0.4mm pitch - requires JEDEC J-STD-020A reflow only |
Pinout & Package
MAX8969EWL37+T is housed in a 1.25mm × 1.25mm, 9-bump wafer-level package (WLP) with 0.4mm pitch. Bump-side-down mounting requires precise solder profile per JEDEC JESD22-A113 and J-STD-020A.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT1 / OUT2 | Power Output | Parallel output terminals; must be shorted directly under IC; bypassed with 22µF ceramic capacitor placed adjacent to bumps |
| IN | Input Supply | Accepts 2.5V–5.5V; requires 4.7µF ceramic bypass capacitor; supports Li-ion battery input |
| LX1 / LX2 | Switching Node | Parallel high-frequency switching nodes; connect 1µH inductor between LX_ and IN; must be shorted under IC |
| EN | Enable Control | Logic-high forces Boost or ATM mode regardless of TREN; logic-low enables TREN-based mode selection |
| GND1 / GND2 | Ground Reference | Parallel ground terminals; must be shorted under IC and connected to large low-impedance ground plane |
| TREN | Track Enable | Logic-high activates Track Mode (30µA IQ); grounded places device in True Shutdown (1µA IQ) |
Key Features
| Feature | Design Value |
|---|---|
| True Shutdown™ | Blocks reverse current from LX_ to OUT_ via reversed pMOS body diode; enables zero-load leakage <1µA |
| Automatic Track Mode (ATM) | Auto-transitions into pMOS pass-through when VIN > 95% of 3.7V (≥3.55V); improves light-load efficiency vs. forced PWM |
| Synchronous Rectification | Integrated nMOS and pMOS switches reduce conduction loss; achieves >90% efficiency at 150mA with VIN = 2.5V |
| Soft-Start Control | Hardware-limited inrush current ≤480mA; prevents input rail collapse during startup into capacitive loads |
| Dynamic Frequency Scaling | Reduces switching frequency to 1.6MHz or 1MHz when VIN approaches VOUT, avoiding minimum on-time violation |
Applications
| Smartphone Main Rail | eBook Display Backlight |
|---|---|
Use Scenario: Powering 3.7V system rail from declining Li-ion cell (3.0V–4.2V). IC Role / Device Role / Timing Role: Step-up regulator maintaining stable 3.7V supply during battery discharge; transitions between Boost, ATM, and Track modes automatically. Use Value: Extends usable battery life by >12% vs. fixed-frequency boosters via ATM and skip-mode operation at light loads. |
Use Scenario: Driving white LED strings requiring regulated 3.7V from single-cell battery. IC Role / Device Role / Timing Role: High-efficiency DC-DC source with fast transient response (<1µs mode transition) for dynamic backlight dimming. Use Value: Delivers 700mA continuous current with <20mVpp ripple, enabling flicker-free display operation across full brightness range. |
| GPS/PND RF Module | Mobile Internet Device USB OTG |
Use Scenario: Supplying noise-sensitive GPS LNA and RF front-end circuits. IC Role / Device Role / Timing Role: Low-noise 3.7V power source with 3MHz switching and integrated EMI mitigation via small passive footprint. Use Value: Achieves <−55dBc conducted noise at 100MHz due to tight layout guidance and synchronous rectification. |
Use Scenario: Providing 3.7V VBUS for USB On-The-Go host functionality in portable devices. IC Role / Device Role / Timing Role: Fast-startup boost converter enabling <200µs VOUT ramp to 3.7V upon USB enumeration detection. Use Value: Meets USB 2.0 VBUS rise-time requirement (≤10ms) with soft-start and 480mA inrush limit, preventing host controller reset. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-up converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS6109925DSER | Fixed 3.7V output; 1.2A peak; 0.7µA shutdown IQ; no ATM mode; 1.2MHz fixed frequency | Lacks automatic track mode and dynamic frequency scaling; lower light-load efficiency below 10mA | Preferred where ultra-low shutdown current dominates over transient response and mid-load efficiency |
| RT9080ALGQW | Adjustable output (0.6V–5.5V); 1A peak; 25µA IQ in PFM; no True Shutdown; 2.5MHz switching | Requires external feedback resistors; lacks reverse-current blocking and ATM hysteresis; higher EMI risk without frequency scaling | Selected when output voltage flexibility outweighs need for guaranteed 3.7V accuracy and robust short-circuit recovery |
Compared with MAX8969EWL37+T, the TPS6109925DSER offers lower shutdown IQ but sacrifices ATM efficiency optimization and fast mode transitions, while the RT9080ALGQW provides output adjustability at the cost of guaranteed 3.7V regulation accuracy, True Shutdown reliability, and thermal-safe current limiting.
Availability
MAX8969EWL37+T is available at Aetrix Electronics and suitable for smartphone main rails, eBook display backlights, GPS/PND RF modules, and mobile internet device USB OTG power supplies requiring stable component supply with guaranteed long-term lifecycle support.
Supply support for MAX8969EWL37+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) designs precision analog, mixed-signal, and power management ICs for demanding portable, industrial, and communications applications.
The MAX8969 product line targets compact, high-efficiency DC-DC conversion in space-constrained handheld devices, emphasizing ultra-low quiescent current, multi-mode operation, and robust fault protection for single-cell Li-ion systems.
FAQ
What output voltage does the MAX8969EWL37+T deliver, and how accurate is it?
The MAX8969EWL37+T delivers a factory-trimmed fixed output voltage of 3.7V. At no load, output voltage is guaranteed between 3.64V and 3.85V (±3.5%). Under 600mA load and typical conditions, it maintains ≥3.35V. This accuracy is achieved via internal resistor ladder trimming and is specified across −40°C to +85°C ambient temperature.
How does the MAX8969EWL37+T enter Automatic Track Mode (ATM), and what triggers exit?
The MAX8969EWL37+T enters ATM when VIN exceeds 95% of its 3.7V target (≥3.55V) and EN is high - independent of TREN state. It exits ATM and returns to Boost Mode within 1µs when VIN falls below 3.50V (95% − 50mV hysteresis). This transition is handled entirely by internal comparators and requires no external intervention.
What is the maximum continuous output current the MAX8969EWL37+T can sustain at 3.7V output?
The MAX8969EWL37+T guarantees ≥700mA continuous output current at 3.7V and +85°C ambient, as specified in the "Minimum Continuous Output Current" table for VOUT = 3.7V. At +25°C, it supports ≥1A continuously under typical PCB thermal conditions with proper copper pour and airflow.
Does the MAX8969EWL37+T require external compensation components for stability?
No, the MAX8969EWL37+T uses an internally compensated voltage-positioning control loop. Stability is ensured with the recommended 1µH inductor and 22µF X5R/X7R ceramic output capacitor. No external compensation network (e.g., RC snubber or phase-compensation capacitor) is required or supported.
What protection features are integrated into the MAX8969EWL37+T, and how do they behave during fault conditions?
The MAX8969EWL37+T integrates undervoltage lockout (2.2V threshold), overtemperature shutdown (+165°C with 20°C hysteresis), and short-circuit protection. During hard short, output voltage collapses; if VOUT drops below 72% of 3.7V (≤2.66V), the IC enters True Shutdown and attempts automatic restart once the fault clears - all without external circuitry.
MAX8969EWL37+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 9-WFBGA, WLBGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Boost
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.5V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 3.7V
- Voltage - Output (Max):
- -
- Current - Output:
- 700mA
- Frequency - Switching:
- 3MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 9-WLP (1.26x1.26)
MAX8969EWL37+T FAQ
1.How can I place an order for MAX8969EWL37+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8969EWL37+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 MAX8969EWL37+T reliable?
The price and inventory of MAX8969EWL37+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8969EWL37+T is usually 5 days.
3.What payment methods are accepted for MAX8969EWL37+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8969EWL37+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8969EWL37+T?
MAX8969EWL37+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8969EWL37+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 MAX8969EWL37+T?
For technical support, including MAX8969EWL37+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8969EWL37+T requirements.
6.How does Aetrix verify that MAX8969EWL37+T is sourced from the original manufacturer or authorized distributors?
All MAX8969EWL37+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 MAX8969EWL37+T meets industry standards.
7.What is the process for return or replacement of MAX8969EWL37+T?
All MAX8969EWL37+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX8969EWL37+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 MAX8969EWL37+T part is unused and in its original packaging.
Return procedure for MAX8969EWL37+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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