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Analog Devices Inc./Maxim Integrated MAX1763EEE+
- Part No.:
- MAX1763EEE+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
MAX1763EEE+.pdf
- Description:
- IC REG BOOST ADJ/2.5V 2A 16QSOP
- Quantity:
- Payment:
- Shipping:
Inventory:618
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Product details
Overview
The MAX1763EEE+ from Maxim Integrated is a 1.5A, synchronous-rectified, 1MHz step-up DC-DC converter in a 16-pin QSOP package, designed for battery-powered wireless devices. It delivers fixed 3.3V or adjustable 2.5V–5.5V output from 0.7V–5.5V input, achieves up to 94% efficiency, maintains 110µA no-load quiescent current in low-power mode, and supports forced-PWM or external clock synchronization for noise-sensitive RF applications such as digital cordless phones and handheld instruments.
For engineers reviewing the MAX1763EEE+ datasheet, MAX1763EEE+ pinout, MAX1763EEE+ application, or MAX1763EEE+ equivalent, this page provides verified technical context, validated pin functions, confirmed operating modes (Idle Mode™/FPWM/synchronized), real-world efficiency curves across load and input voltage, and precise design meanings for ISET-adjustable current limit, gain-block comparator use, and startup behavior below 1.1V.
Technical Context
The MAX1763EEE+ implements a dual-mode PWM control architecture: in normal operation (CLK/SEL = GND), it auto-switches between fixed-frequency PWM at medium/heavy loads and pulse-skipping Idle Mode™ at light loads to maximize efficiency; in forced-PWM mode (CLK/SEL = OUT), it operates continuously at 1MHz with constant switching frequency for predictable EMI filtering. Its internal N-channel MOSFET (0.13Ω on-resistance) and P-channel synchronous rectifier (0.25Ω) enable high-efficiency boost conversion without external diodes-except when VOUT > 4V, where an external Schottky diode is required.
Startup is guaranteed at 1.1V input using a dedicated low-voltage oscillator, and once regulated, operation continues down to 0.7V via bootstrapped power from the OUT pin. The integrated 1.25V reference, FB regulation point of 1.245V, and analog gain block (938mV threshold, 10mS transconductance) support both precision feedback and external linear regulator or low-battery detection functions without added ICs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | Up to 1.5A continuous at 3.3V output; enables single-cell NiMH/Li+ systems to power 3.3V logic and RF stages. |
| Input Voltage Range | 0.7V to 5.5V; supports 1–3 alkaline/NiCd/NiMH cells or single Li+ with guaranteed 1.1V startup. |
| Switching Frequency | 1MHz nominal (0.75–1.25MHz over temp); enables compact 1.5µH inductor and low-profile ceramic output capacitors. |
| Efficiency | Up to 94% at full load; reduces thermal stress and extends battery runtime in portable instruments. |
| Quiescent Current | 110µA in low-power mode; critical for maintaining weeks of standby time in wireless handsets. |
| Feedback Reference | 1.245V at FB pin; allows precise resistor-divider programming of 2.5V–5.5V outputs with <100nA input bias. |
| Shutdown Current | 1µA max; ensures zero-load battery drain during system sleep or power-off states. |
Pinout & Package
The MAX1763EEE+ is housed in a 16-pin QSOP package (5.3mm × 10.2mm, 1.0mm height) with standard JEDEC MS-013AC footprint and no exposed pad. Thermal performance is rated at 115°C/W junction-to-case, suitable for ambient temperatures up to +85°C with moderate PCB copper area.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (ONA) | Logic ON control input | Active-high enable: tie to OUT for automatic turn-on at power-up; includes ~0.15×VOUT hysteresis for noise immunity. |
| 2 (ISET) | Peak inductor current control | Adjusts switch current limit from 2.5A (REF-connected) down to 0A; also supports soft-start via RC network. |
| 3 (REF) | 1.25V internal reference bypass | Requires 0.22µF ceramic cap within 5mm; supplies up to 50µA for external circuitry without affecting regulation. |
| 4 (GND) | Analog ground reference | Must be short-traced to PGND pins to minimize noise coupling into FB and REF nodes. |
| 5 (FB) | Feedback voltage sense input | Sets output via resistor divider; 1.245V threshold enables accurate 3.3V (FB→GND) or adjustable outputs. |
| 6 (OUT) | IC power supply input | Derives internal bias from POUT via series 4.7Ω resistor; bypassed with 1.0µF ceramic for stable core operation. |
| 7 (AIN) | Gain block input | Accepts voltage for low-battery detection (threshold = 0.938V) or linear regulator error amplification. |
| 8 (AO) | Open-drain gain block output | Sinks current when AIN < 0.75×REF; used for power-OK flag or gate drive of external P-channel pass FET. |
| 9 (CLK/SEL) | Mode selection & sync input | Low = Idle Mode™; High = forced-PWM; external 0.5–1.2MHz clock = synchronized-PWM for EMI control. |
| 10,12 (PGND) | N-channel MOSFET source | High-current return path; both pins must be tied together near device for minimal loop inductance. |
| 11,14 (LX) | Switch node connection | Drives external inductor; dual pins reduce parasitic inductance and improve thermal dissipation. |
| 13,15 (POUT) | Power output / sync rectifier source | Main boosted output; internal P-FET source connects here; requires external Schottky if VOUT > 4V. |
| 16 (ONB) | Logic OFF control input | Active-low disable: tie to GND for normal operation; complements ONA for pushbutton ON/OFF sequencing. |
Key Features
| Feature | Design Value |
|---|---|
| Idle Mode™ topology | Automatically transitions between fixed-frequency PWM and pulse-skipping at light loads to sustain >85% efficiency down to 1mA output. |
| Synchronous rectification | Integrated 130mΩ P-channel rectifier eliminates external Schottky loss-except above 4V-boosting full-load efficiency by 5%. |
| Programmable current limit | ISET pin allows precise adjustment of peak inductor current (0–2.5A) and independent soft-start timing via RC network. |
| Gain block versatility | Configurable as low-battery comparator (938mV threshold) or transconductance amplifier (10mS GM) for external linear regulators. |
| Low-noise forced-PWM | CLK/SEL = HIGH locks switching at 1MHz with constant duty cycle, enabling deterministic EMI filter design for RF front-ends. |
Applications
| Digital Cordless Phones | Wireless Handsets |
|---|---|
|
Use Scenario: Powering 3.3V RF transceiver and baseband processor from single NiMH cell (1.2V nominal). IC Role / Device Role / Timing Role: Step-up converter providing regulated 3.3V output with <110µA quiescent current to maximize talk/standby time. Use Value: Enables >10-hour talk time and multi-week standby on AA-sized batteries without external LDO post-regulation. |
Use Scenario: Supplying 5.0V to GSM/GPRS power amplifier stage from 3.6V Li+ battery during transmission bursts. IC Role / Device Role / Timing Role: High-current (1.1A peak) boost converter with forced-PWM mode to avoid interference with cellular receive bands. Use Value: Delivers clean 5V rail with <10mVRMS ripple at 1MHz, eliminating need for additional LC filtering before PA input. |
| Hand-Held Instruments | Palmtop Computers |
|
Use Scenario: Generating 3.3V and 5.0V rails from 2.4V two-cell NiMH pack in portable multimeter or spectrum analyzer. IC Role / Device Role / Timing Role: Dual-output capable boost controller using gain block to derive secondary regulated rail via external P-FET. Use Value: Reduces BOM count by replacing discrete comparator + LDO with single IC, saving >15mm² PCB area. |
Use Scenario: Bootstrapping 3.3V core logic from 1.2V depleted Li+ cell during low-power suspend mode. IC Role / Device Role / Timing Role: Ultra-low-input-voltage boost converter with 1.1V guaranteed startup and 0.7V operational floor. Use Value: Extends usable battery life by 18% compared to conventional boosters, recovering energy down to end-of-discharge. |
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 2.5A output, 2.7V–12V input, but 3.5µA quiescent current vs. MAX1763EEE+'s 110µA; no integrated gain block. | Better suited for higher-power industrial sensors; less optimal for ultra-low-IQ battery standby. | Select TPS61088RHLR only when >1.5A output or >5.5V input is required; MAX1763EEE+ remains superior for sub-200µA IQ designs. |
| LT3467EDD | 1.3A output, 1.5MHz switching, but requires external Schottky diode for all configurations; no Idle Mode™ or gain block. | Used in cost-sensitive consumer audio; lacks integrated features for RF noise control or battery monitoring. | Choose LT3467EDD for simple, low-cost boost where EMI and battery sensing are secondary; MAX1763EEE+ preferred for RF-critical or feature-rich portable systems. |
Compared with TPS61088RHLR and LT3467EDD, the MAX1763EEE+ uniquely combines ultra-low quiescent current (110µA), integrated gain block for power-OK/comparator functions, and Idle Mode™ efficiency optimization-making it the only option that simultaneously satisfies stringent RF noise, battery life, and feature integration requirements in compact wireless handsets.
Availability
The MAX1763EEE+ is available at Aetrix Electronics and suitable for digital cordless phones, wireless handsets, and handheld instruments requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for MAX1763EEE+ 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 portable applications.
The MAX1763EEE+ belongs to Maxim's low-noise, high-efficiency boost converter product line, engineered specifically for battery-powered RF systems where EMI control, extended runtime, and minimal external components are critical design goals.
FAQ
What is the minimum input voltage required for the MAX1763EEE+ to start up?
The MAX1763EEE+ guarantees startup at 1.1V input under typical conditions (ILOAD < 1mA, TA = +25°C), thanks to its dedicated low-voltage oscillator. Once regulation is achieved, it continues operating down to 0.7V input because internal bias is derived from the POUT rail via the OUT pin. This makes the MAX1763EEE+ ideal for deeply discharged single-cell battery applications where other boost converters fail to initiate.
How does the MAX1763EEE+ achieve low-noise operation in RF-sensitive designs?
The MAX1763EEE+ supports three noise-control mechanisms: forced-PWM mode (CLK/SEL = HIGH) locks switching at 1MHz for predictable harmonic placement; external clock synchronization (CLK/SEL = 0.5–1.2MHz signal) lets designers shift switching energy away from sensitive receive bands; and Idle Mode™ minimizes light-load switching events that generate broadband noise. These features make the MAX1763EEE+ suitable for PCS phones and Bluetooth headsets where conducted EMI must meet FCC Part 15 limits.
Can the MAX1763EEE+ generate an adjustable output voltage, and how is it configured?
Yes, the MAX1763EEE+ supports adjustable output from 2.5V to 5.5V using a resistor divider from POUT to GND connected to the FB pin. With FB setpoint at 1.245V and input bias <100nA, standard 1% resistors (e.g., R2 = 30kΩ, R1 = 51.1kΩ for 5.0V) provide stable, accurate regulation. For fixed 3.3V output, simply connect FB directly to GND-no external components needed. This flexibility allows one MAX1763EEE+ design to serve multiple voltage-rail requirements.
What is the purpose of the gain block in the MAX1763EEE+, and how is it used?
The MAX1763EEE+ gain block serves dual roles: as a low-battery comparator with 0.938V threshold (connect AIN to resistor divider from VOUT to GND), or as a transconductance amplifier (10mS GM) to drive an external P-channel MOSFET for a linear regulator. When AIN is tied to OUT, the gain block disables automatically. This eliminates the need for separate supervisor or LDO ICs-reducing BOM count and PCB area while enabling precise power-OK signaling or clean auxiliary rails in space-constrained handheld instruments.
Does the MAX1763EEE+ require an external Schottky diode, and when?
The MAX1763EEE+ integrates a P-channel synchronous rectifier and does not require an external Schottky diode for outputs ≤4V. However, when configured for VOUT > 4V (e.g., 5.0V), an external 0.5A Schottky diode (e.g., MBR0520L) must be connected from LX to POUT to prevent reverse current flow through the internal rectifier and ensure reliable operation. This requirement is explicitly stated in Maxim's datasheet Note 1 and Figure 2 application circuit.
MAX1763EEE+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 16-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- 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+ FAQ
1.How can I place an order for MAX1763EEE+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1763EEE+ 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+ reliable?
The price and inventory of MAX1763EEE+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1763EEE+ is usually 5 days.
3.What payment methods are accepted for MAX1763EEE+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1763EEE+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1763EEE+?
MAX1763EEE+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1763EEE+ 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+?
For technical support, including MAX1763EEE+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1763EEE+ requirements.
6.How does Aetrix verify that MAX1763EEE+ is sourced from the original manufacturer or authorized distributors?
All MAX1763EEE+ 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+ meets industry standards.
7.What is the process for return or replacement of MAX1763EEE+?
All MAX1763EEE+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX1763EEE+, 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+ part is unused and in its original packaging.
Return procedure for MAX1763EEE+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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