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Analog Devices Inc./Maxim Integrated MAX1763EEE-T
- Part No.:
- MAX1763EEE-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
MAX1763EEE-T.pdf
- Description:
- IC REG BOOST ADJ/2.5V 2A 16QSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,674
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Product details
Overview
MAX1763EEE-T from Maxim Integrated is a 1.5A, synchronous-rectified, 1MHz step-up DC-DC converter optimized for battery-powered wireless devices. It delivers fixed 3.3V or adjustable 2.5V–5.5V output from 0.7V–5.5V input, guarantees startup at 1.1V, maintains 110µA no-load quiescent current in low-power mode, and supports forced-PWM or external clock synchronization for RF-sensitive applications such as digital cordless phones and handheld instruments.
For engineers reviewing the MAX1763EEE-T datasheet, MAX1763EEE-T pinout, MAX1763EEE-T application, or MAX1763EEE-T equivalent, key selection criteria include guaranteed 1.1V startup voltage, 1.5A output capability with programmable current limit, synchronous rectification for >94% efficiency, low-noise 1MHz PWM operation, and dual-mode control (normal/forced-PWM) via CLK/SEL pin.
Technical Context
The MAX1763EEE-T implements a synchronous boost topology using an internal N-channel MOSFET switch and P-channel synchronous rectifier (130mΩ typical on-resistance), enabling high efficiency across wide input ranges. Its Idle Mode™ dynamically transitions between pulse-frequency modulation (PFM) at light loads and fixed-frequency PWM above ~25% load to maximize battery life without sacrificing full-load performance.
It integrates a 1.25V precision reference, analog gain block (10mS transconductance, 0.938V AIN threshold), and dual enable logic (ONA/ONB) with hysteresis. The device supports three operating modes-normal (auto-switching), forced-PWM (constant 1MHz), and externally synchronized (500kHz–1.2MHz)-each with distinct noise, efficiency, and transient response trade-offs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 0.7V to 5.5V - supports single Li+, one-to-three alkaline/NiMH cells; operates down to 0.7V after startup. |
| Output Voltage | Fixed 3.3V (FB grounded) or adjustable 2.5V–5.5V - set via external resistor divider with 1.245V FB reference. |
| Max Output Current | 1.5A - achievable at VIN ≥ 2.4V for 3.3V output; derates per input voltage and thermal conditions. |
| Switching Frequency | 1MHz nominal (0.75–1.25MHz over temp) - enables compact 1.5µH inductor and low EMI filtering. |
| Quiescent Current | 110µA (low-power mode, CLK/SEL = GND) - extends battery life in standby; drops to 1µA in shutdown. |
| Startup Voltage | 1.1V guaranteed (at TA = +25°C) - ensures reliable wake-up from deeply discharged batteries. |
| Efficiency | Up to 94% - achieved via synchronous rectification and optimized gate drive; exceeds diode-based boost by ~5%. |
Pinout & Package
The MAX1763EEE-T is housed in a 16-pin QSOP package (5.3mm × 10.2mm, 0.65mm pitch) with standard lead finish. Thermal performance is rated at 115°C/W junction-to-ambient (θJA) under JEDEC JESD51-7 conditions.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (ONA) | Enable Control Input | Active-high ON signal; tied to OUT for default operation; includes ~0.15×VOUT hysteresis. |
| 2 (ISET) | Peak Current Limit & Soft-Start Control | Adjusts inductor peak current (2.5A max when tied to REF); capacitor to GND enables controlled output ramp-up. |
| 3 (REF) | 1.25V Precision Reference Output | Bypassed with 0.22µF ceramic cap; supplies up to 50µA external load; used for feedback and current limit scaling. |
| 4 (GND) | Analog Ground | Reference node for internal circuits; must be short-traced to PGND for stability and noise immunity. |
| 5 (FB) | Feedback Input | Senses output via resistor divider; 1.245V regulation point; <100nA input bias enables high-impedance dividers. |
| 6 (OUT) | IC Power Supply Input | Connected to POUT through 4.7Ω resistor; powers internal circuitry once output is established. |
| 7 (AIN) | Gain Block Input | Accepts voltage for comparator or linear regulator function; 0.938V internal threshold; disabled when tied to OUT. |
| 8 (AO) | Gain Block Output | Open-drain N-channel output; sinks current when AIN < 0.75×VREF; high-Z during shutdown. |
| 9 (CLK/SEL) | Mode Selection & Clock Input | Low = normal (PFM/PWM auto-switch); high = forced-PWM; external clock = synchronized mode (500kHz–1.2MHz). |
| 10,12 (PGND) | Power Ground | Source of N-channel switch; both pins must be connected together near device for low-inductance return path. |
| 11,14 (LX) | Switch Node | Connection to inductor; high di/dt node requiring tight layout; tied together near IC for minimal loop area. |
| 13,15 (POUT) | Power Output | Source of internal P-channel synchronous rectifier; connects to output capacitor and load. |
| 16 (ONB) | Disable Control Input | Active-low OFF signal; tied to GND for default operation; complements ONA for robust enable logic. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous Rectification | Integrated 130mΩ P-channel rectifier improves efficiency by ~5% vs. Schottky diode solutions and reduces thermal load. |
| Idle Mode™ Operation | Automatically shifts from fixed-frequency PWM to burst-mode PFM at light loads (<25% full scale), cutting quiescent current to 110µA. |
| Low-Noise Forced-PWM | CLK/SEL = high forces constant 1MHz switching regardless of load, enabling predictable EMI filtering in RF front-ends. |
| External Clock Synchronization | Accepts 500kHz–1.2MHz external clock on CLK/SEL to avoid interference with sensitive bands (e.g., GSM, Bluetooth). |
| Programmable Current Limit | ISET pin allows precise adjustment of peak inductor current (2.0A–2.5A typical range) via resistive divider or DAC. |
| Integrated Gain Block | 10mS transconductance amplifier with 0.938V reference enables power-OK detection or external linear regulator control without extra ICs. |
Applications
| Digital Cordless Phones | Wireless Handsets |
|---|---|
Use Scenario: Powering RF transceivers and baseband processors from single-cell Li+ batteries with strict EMI limits. IC Role / Device Role / Timing Role: Primary step-up regulator delivering stable 3.3V rail; synchronizes switching frequency to avoid GSM 900/1800MHz bands. Use Value: 1.1V startup ensures operation during deep discharge; forced-PWM mode eliminates variable-frequency noise that could desensitize receivers. |
Use Scenario: Supplying display backlight drivers and audio codecs in compact handheld radios. IC Role / Device Role / Timing Role: High-efficiency boost converter with soft-start (via ISET capacitor) preventing inrush-induced brownouts during power-on. Use Value: 94% peak efficiency extends talk time; synchronous rectification minimizes heat in sealed enclosures. |
| Hand-Held Instruments | Palmtop Computers |
Use Scenario: Generating 5V from 2.4V NiMH battery stack for USB peripherals and sensors. IC Role / Device Role / Timing Role: Adjustable-output boost regulator (2.5V–5.5V) with precision 1.245V FB reference enabling ±1% output accuracy. Use Value: Programmable current limit protects against short-circuit faults; gain block monitors battery voltage for low-battery warning. |
Use Scenario: Providing clean 3.3V core supply for ARM-based processors and memory in space-constrained PDAs. IC Role / Device Role / Timing Role: Low-noise, high-density power solution using 1.5µH inductor and ceramic capacitors only. Use Value: 110µA quiescent current maximizes standby duration; QSOP package fits tight board real estate. |
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 |
|---|---|---|---|
| TPS61088RHLR | Higher 5A output, 2.7V–12V input, no integrated gain block, requires external compensation. | Better suited for high-current, wide-input applications; lacks low-voltage startup (min VIN = 2.7V) and analog monitoring features. | Select when >2A output or >5.5V input is required; avoid where 1.1V startup or gain-block functionality is critical. |
| LT3467EDD | 1.3A output, 1.2MHz fixed frequency, no PFM mode, no gain block, higher 2.5mA quiescent current. | Designed for low-noise, constant-frequency use only; less efficient at light loads due to absence of Idle Mode™. | Choose for ultra-low EMI deterministic systems where PFM artifacts are unacceptable; not optimal for battery longevity. |
Compared with TPS61088RHLR and LT3467EDD, the MAX1763EEE-T uniquely combines guaranteed 1.1V startup, integrated gain block for system monitoring, and adaptive Idle Mode™ for best-in-class light-load efficiency-making it ideal for long-life, low-voltage, RF-sensitive portable designs.
Availability
MAX1763EEE-T is available at Aetrix Electronics and suitable for digital cordless phones, wireless handsets, handheld instruments, palmtop computers, and personal communicators requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX1763EEE-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, communications, and consumer applications.
The MAX1763 belongs to Maxim's high-efficiency, low-noise DC-DC converter product line, designed specifically for battery-powered wireless equipment where extended runtime, RF cleanliness, and ultra-low startup voltage are critical system requirements.
FAQ
What is the minimum input voltage required for the MAX1763EEE-T to start up?
The MAX1763EEE-T guarantees startup at 1.1V input voltage (measured at TA = +25°C with ILOAD < 1mA). Once operational, it continues regulating down to 0.7V input because internal power is derived from the output via the OUT pin. Full load should not be applied until the output exceeds 2.3V to ensure stable regulation.
How does the MAX1763EEE-T achieve high efficiency at light loads?
The MAX1763EEE-T uses proprietary Idle Mode™ circuitry that automatically switches from fixed-frequency PWM to pulse-frequency modulation (PFM) below ~25% of full load. This reduces switching losses and cuts no-load supply current to just 110µA, significantly extending battery life in standby or intermittent-use applications.
Can the MAX1763EEE-T be synchronized to an external clock, and what is the supported frequency range?
Yes, the MAX1763EEE-T supports external clock synchronization via the CLK/SEL pin. When driven by an external signal, it operates in forced-PWM mode across a 500kHz to 1.2MHz range. For optimal noise rejection, duty cycle should be kept below 10% or above 90% to prevent edge coincidence with power switching events.
What is the purpose of the gain block in the MAX1763EEE-T, and how is it configured?
The MAX1763EEE-T's gain block is a transconductance amplifier (10mS typical) with a 0.938V internal reference. It can serve as a low-battery comparator (connect AIN to resistor divider) or drive an external P-channel MOSFET to build a linear post-regulator. Connecting AIN to OUT disables the block and its 25–50µA supply current.
Does the MAX1763EEE-T require an external Schottky diode, and if so, under what conditions?
An external Schottky diode (e.g., MBR0520L) is required when the output voltage exceeds 4V or when assisting low-voltage startup (VIN < 1.2V). This is necessary because the internal P-channel synchronous rectifier cannot safely block reverse current above ~4V; the diode clamps LX-to-POUT voltage and prevents shoot-through.
MAX1763EEE-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 16-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Boost
- Output Type:
- Adjustable (Fixed)
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 0.7V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 2.5V (3.3V)
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 2A (Switch)
- Frequency - Switching:
- 750kHz ~ 1.25MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-QSOP
MAX1763EEE-T FAQ
1.How can I place an order for MAX1763EEE-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1763EEE-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 MAX1763EEE-T reliable?
The price and inventory of MAX1763EEE-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1763EEE-T is usually 5 days.
3.What payment methods are accepted for MAX1763EEE-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1763EEE-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1763EEE-T?
MAX1763EEE-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1763EEE-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 MAX1763EEE-T?
For technical support, including MAX1763EEE-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1763EEE-T requirements.
6.How does Aetrix verify that MAX1763EEE-T is sourced from the original manufacturer or authorized distributors?
All MAX1763EEE-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 MAX1763EEE-T meets industry standards.
7.What is the process for return or replacement of MAX1763EEE-T?
All MAX1763EEE-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX1763EEE-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 MAX1763EEE-T part is unused and in its original packaging.
Return procedure for MAX1763EEE-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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