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Analog Devices Inc./Maxim Integrated MAX1896EUT+T
- Part No.:
- MAX1896EUT+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SOT-23-6
- Datasheet:
-
MAX1896EUT+T.pdf
- Description:
- IC REG BST SEPIC ADJ 500MA SOT6
- Quantity:
- Payment:
- Shipping:
Inventory:2,467
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Product details
Overview
The MAX1896EUT+T from Maxim Integrated is a current-mode, fixed-frequency step-up DC-DC converter with an integrated 0.7Ω N-channel MOSFET, operating at 1.4MHz switching frequency, supporting 2.6V–5.5V input and adjustable output up to 13V, delivering up to 600mA, and used in space-constrained portable power rails for LCD bias and PCMCIA card regulation.
For engineers reviewing the MAX1896EUT+T datasheet, MAX1896EUT+T pinout, MAX1896EUT+T application, or MAX1896EUT+T equivalent, key selection criteria include guaranteed 12V/120mA output from 5V input, programmable soft-start via external capacitor, 0.01µA shutdown current, LT1613 pin compatibility, and SOT23-6 footprint suitability for high-density handheld designs.
Technical Context
The MAX1896EUT+T employs a current-mode PWM architecture with internal slope compensation to stabilize operation at high duty cycles, enabling fast transient response and cycle-skipping at light loads to maintain efficiency. Its error amplifier regulates output by controlling inductor peak current based on feedback voltage at the FB pin.
Soft-start is implemented by charging an external capacitor (SS pin) at 4µA to ramp peak current from 0A to full limit over ~220ms (with 33nF), while shutdown disables all internal circuitry except leakage paths, reducing supply current to 0.01µA without disconnecting the output path through external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 1.4MHz typical - enables use of small inductors & ceramic capacitors, reducing board area and EMI filter complexity. |
| Input Voltage Range | 2.6V to 5.5V - supports single-cell Li+ (2.7–4.2V), NiMH, or regulated 3.3V/5V rails without pre-regulation. |
| Output Voltage Range | Adjustable up to 13V - set via resistive divider on FB pin; 1.24V feedback reference enables precise VOUT tuning. |
| Output Current Capability | Up to 600mA - dependent on VIN, VOUT, inductor value, and efficiency; guaranteed 120mA at 12V from 5V input. |
| Shutdown Current | 0.01µA max - minimizes battery drain in standby mode for always-on portable systems. |
| Current Limit Threshold | 0.55A min - protects internal MOSFET during overload or short-circuit conditions with slope-compensated current sensing. |
| Efficiency | >90% typical - achieved via low RON (0.7Ω) switch and optimized control loop, critical for thermal management in sealed enclosures. |
Pinout & Package
The MAX1896EUT+T is housed in a 6-pin SOT23-6 package (JEDEC MO-178AA), with exposed pad not electrically connected. Pin spacing is 0.95mm, body dimensions 2.9mm × 1.6mm × 1.1mm, suitable for reflow assembly and high-density layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| LX | Power Switch Node | Connection to inductor and catch diode anode; carries high di/dt switching current - requires shortest possible trace and local ground return. |
| GND | Analog & Power Ground | Common reference for error amplifier, bias circuits, and power return; must be star-connected near IC to avoid noise coupling. |
| FB | Feedback Input | High-impedance (21–80nA bias) node sensing resistor divider output; sets regulation point at 1.24V - sensitive to PCB leakage and noise. |
| SHDN | Enable/Shutdown Control | Active-low logic input; draws ≤50µA when high, pulls internal bias off when low - must not float; slew rate ≥0.1V/µs recommended. |
| SS | Soft-Start Timing | Capacitor-connected node charged at 4µA to 0.5V; controls ramp rate of peak inductor current - determines inrush current limiting duration. |
| IN | Bias & Input Supply | Internal regulator input tied to main supply; requires ≥1µF ceramic bypass close to pin to suppress high-frequency ripple and ensure stable startup. |
Key Features
| Feature | Design Value |
|---|---|
| 1.4MHz Fixed-Frequency PWM | Enables <10µH inductors and <10µF ceramic output caps, cutting solution size by >40% vs. 300kHz converters. |
| Integrated 0.7Ω N-Channel MOSFET | Eliminates external switch and gate driver, reducing BOM count and layout complexity while maintaining >90% efficiency at 100mA. |
| Programmable Soft-Start | Prevents input inrush and output overshoot using a single external capacitor - essential for powering sensitive analog circuitry or flash memory. |
| LT1613 Pin Compatibility | Allows drop-in replacement in existing designs using Linear Technology's step-up controller, simplifying second-source qualification. |
| 0.01µA Shutdown Current | Extends battery life in devices requiring long-term storage or infrequent wake-up (e.g., medical sensors, remote controls). |
Applications
| Hand-Held Medical Devices | PCMCIA Card Power Management |
|---|---|
Use Scenario: Powering CCD image sensors and analog front-ends in portable ultrasound probes requiring stable 12V bias from a 3.7V Li+ cell. IC Role / Device Role / Timing Role: Step-up regulator providing regulated high-voltage rail with fast load-step response to handle pulsed sensor current demands. Use Value: 1.4MHz operation minimizes output ripple (<200mVpp) and enables compact 10µH inductor + 22µF tantalum solution fitting within 12mm² PCB area. |
Use Scenario: Generating +12V and –12V rails for legacy PCMCIA Type II peripherals (e.g., modems, LAN cards) from 3.3V host bus. IC Role / Device Role / Timing Role: Primary positive boost stage feeding an inverting charge-pump IC; synchronized shutdown ensures coordinated rail sequencing. Use Value: 0.01µA shutdown current prevents parasitic drain on host battery during card ejection, extending system standby time by >3× vs. non-shutdown alternatives. |
| Notebook LCD Backlight Bias | Portable Test Equipment Displays |
Use Scenario: Driving white LED strings or cold-cathode fluorescent lamps (CCFL) in ultrabook displays requiring 10–13V from 3.3V system rail. IC Role / Device Role / Timing Role: Constant-voltage boost converter supplying CCFL inverter input; FB pin used for closed-loop brightness control via DAC-adjusted divider. Use Value: Adjustable output up to 13V and guaranteed 12V/120mA performance allow direct support of high-brightness panels without external LDO post-regulation. |
Use Scenario: Providing clean 5V and 13V rails for segmented LCD modules and microcontroller peripherals in handheld multimeters and oscilloscopes. IC Role / Device Role / Timing Role: Dual-rail power source where MAX1896EUT+T generates 13V for display contrast, while its 5V output variant powers logic and ADC reference. Use Value: SOT23-6 footprint and 2.6V minimum input enable operation directly from partially discharged batteries (down to 2.7V), extending usable runtime per charge cycle. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-up DC-DC converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT1613CS5#TRMPBF | Pin-compatible, same 6-pin SOT23 package; 1.4MHz oscillator; but uses external N-MOSFET (no integrated switch) | Requires external 0.1Ω MOSFET and gate driver; higher BOM cost but supports >1A output with proper FET selection | Select when higher output current (>300mA) or custom switch optimization is required; not suitable for space-constrained designs needing integrated FET. |
| TPS61040DRVR | Fixed 5V output (non-adjustable); 500kHz switching; 0.5Ω internal switch; 2.7–5.5V input; 0.03µA shutdown | Designed for fixed 5V USB-powered accessories; lacks FB pin for voltage adjustment or external feedback loop control | Select only for cost-sensitive, fixed-output applications where 13V adjustability and 1.4MHz speed are unnecessary; incompatible for LCD bias or PCMCIA use cases. |
Compared with LT1613CS5#TRMPBF and TPS61040DRVR, the MAX1896EUT+T uniquely combines integrated 0.7Ω MOSFET, 13V adjustability, 1.4MHz operation, and 0.01µA shutdown in SOT23-6 - making it optimal for miniaturized, battery-sensitive boost applications where board area and quiescent power are primary constraints.
Availability
MAX1896EUT+T is available at Aetrix Electronics and suitable for notebook computers, LCD displays, and hand-held devices requiring stable component supply with consistent parametric performance across temperature and volume production.
Supply support for MAX1896EUT+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 industrial, automotive, and consumer applications.
The MAX1896EUT+T belongs to Maxim's high-frequency step-up DC-DC converter product line, designed specifically for space- and power-constrained portable electronics requiring efficient, compact, and reliable voltage boosting from single-cell batteries.
FAQ
What is the minimum input voltage required for the MAX1896EUT+T to regulate a 12V output?
The MAX1896EUT+T requires a minimum input voltage of 2.6V to operate, but achieving stable 12V regulation depends on load and efficiency. With 5V input, it guarantees 12V/120mA output; at 2.6V input, maximum achievable output is limited to ~6V due to duty-cycle and dropout constraints. Always verify output capability using the duty-cycle equation and inductor selection guidelines in the MAX1896EUT+T datasheet.
Can the MAX1896EUT+T drive a 13V, 100mA load from a 3.3V input?
Yes, the MAX1896EUT+T can deliver 13V at 100mA from a 3.3V input, as confirmed by typical operating characteristics (Figure toc05). Efficiency remains >85% under these conditions, and the device maintains regulation across -40°C to +85°C. Use a 10µH inductor and 22µF tantalum + 0.1µF ceramic output capacitor per the Typical Operating Circuit (Figure 1) for optimal stability.
How does the soft-start function work on the MAX1896EUT+T, and what capacitor value is recommended?
The MAX1896EUT+T charges an external capacitor on the SS pin at 4µA until reaching 0.5V, linearly ramping peak inductor current from zero to full limit. A 33nF capacitor yields ~220ms soft-start duration, preventing input inrush and output overshoot. Larger values extend ramp time; smaller values risk excessive inrush. Do not leave SS open unless soft-start is intentionally disabled.
Is the MAX1896EUT+T pin-compatible with other step-up controllers, and which ones?
Yes, the MAX1896EUT+T is explicitly pin-compatible with the LT1613CS5#TRMPBF per the "Features" section of its datasheet. Both share identical 6-pin SOT23 pinout (LX, GND, FB, SHDN, SS, IN), enabling direct PCB replacement in existing LT1613 designs - though the MAX1896EUT+T integrates the power switch while LT1613 requires an external MOSFET.
What is the maximum output current the MAX1896EUT+T can deliver at 13V output from a 5V input?
At 5V input and 13V output, the MAX1896EUT+T delivers up to ~150mA continuously while maintaining >90% efficiency and thermal stability, as shown in Figure toc12 (Maximum Output Current vs. Input Voltage). This assumes proper layout, 10µH inductor, and adequate output capacitance. Higher currents require derating due to power dissipation in the 0.7Ω internal MOSFET.
MAX1896EUT+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Up, Step-Up/Step-Down
- Output Configuration:
- Positive
- Topology:
- Boost, SEPIC
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.6V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 2.6V
- Voltage - Output (Max):
- 13V
- Current - Output:
- 500mA
- Frequency - Switching:
- 1.4MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-6
MAX1896EUT+T FAQ
1.How can I place an order for MAX1896EUT+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1896EUT+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 MAX1896EUT+T reliable?
The price and inventory of MAX1896EUT+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1896EUT+T is usually 5 days.
3.What payment methods are accepted for MAX1896EUT+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1896EUT+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1896EUT+T?
MAX1896EUT+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1896EUT+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 MAX1896EUT+T?
For technical support, including MAX1896EUT+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1896EUT+T requirements.
6.How does Aetrix verify that MAX1896EUT+T is sourced from the original manufacturer or authorized distributors?
All MAX1896EUT+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 MAX1896EUT+T meets industry standards.
7.What is the process for return or replacement of MAX1896EUT+T?
All MAX1896EUT+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX1896EUT+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 MAX1896EUT+T part is unused and in its original packaging.
Return procedure for MAX1896EUT+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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