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Analog Devices Inc./Maxim Integrated MAX1760EUB+
- Part No.:
- MAX1760EUB+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX1760EUB+.pdf
- Description:
- IC REG BOOST ADJ/2.5V 1A 10UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:1,861
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Product details
Overview
The MAX1760EUB+ from Maxim Integrated is a high-efficiency, low-noise, synchronous step-up DC-DC converter optimized for battery-powered wireless devices. It delivers up to 800mA output at fixed 3.3V or adjustable 2.5V–5.5V from 0.7V–5.5V input, operates at 1MHz PWM with Idle-Mode™ light-load optimization, and features logic-low enable (ON), 100µA no-load quiescent current, and 10-pin µMAX package - used in digital cordless phones and handheld instruments.
For engineers reviewing the MAX1760EUB+ datasheet, MAX1760EUB+ pinout, MAX1760EUB+ application, or MAX1760EUB+ equivalent, key selection criteria include startup voltage (1.1V min), adjustable current limit via ISET, forced-PWM/external sync capability on CLK/SEL, soft-start programmability, and synchronous rectifier integration requiring external Schottky diode above 4V output.
Technical Context
The MAX1760EUB+ implements a synchronous-rectified PWM boost topology with integrated N-channel MOSFET switch (0.28Ω typ) and P-channel synchronous rectifier. Its proprietary Idle-Mode™ dynamically transitions between pulse-frequency modulation (PFM) at light loads and fixed-frequency PWM (1MHz) at medium/heavy loads to maximize efficiency across operating range.
Operating mode is selected via CLK/SEL: low for auto-switching PFM/PWM, high for forced-PWM only, or externally clocked (500kHz–1.2MHz) for EMI-sensitive RF applications. Feedback regulation uses a precision 1.24V reference (±1%) at FB pin, supporting fixed 3.3V (FB-to-GND) or resistor-divider-adjustable outputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 0.7V to 5.5V - supports single Li+, 1–3 alkaline/NiMH cells; boots from 1.1V startup threshold. |
| Output Voltage | Fixed 3.3V (FB grounded) or adjustable 2.5V–5.5V - set by resistive divider with 1.24V FB reference. |
| Max Output Current | 800mA at VOUT=3.3V, VIN=2.4V - limited by internal 1.25A N-channel switch current (adjustable via ISET). |
| Switching Frequency | 1MHz nominal (0.75–1.2MHz) - fixed in forced-PWM mode; synchronizable to external 500kHz–1.2MHz clock. |
| Quiescent Current | 100µA (no-load, CLK/SEL = GND) - drops to 0.1µA in shutdown (ON = high); enables long battery life. |
| Efficiency | Up to 94% - achieved via synchronous rectification and Idle-Mode™ PFM/PWM transition. |
| Package | 10-pin µMAX (U10-2), 3mm × 3mm footprint - exposed paddle not present; thermal resistance ~707mW max (multilayer board). |
Pinout & Package
MAX1760EUB+ uses the 10-pin µMAX package (U10-2), a compact 3mm × 3mm surface-mount package with gull-wing leads and no exposed thermal paddle. Pin numbering follows standard top-view orientation with Pin 1 at top-left corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 ISET | N-channel current-limit control & soft-start node | Adjusts peak inductor current (1.25A default); capacitor here enables analog soft-start; discharged internally during shutdown. |
| 2 REF | 1.25V precision reference output | Bypassed with 0.22µF ceramic; sources ≤50µA; feeds FB divider and ISET circuitry. |
| 3 GND | Analog ground reference | Must be short-traced to PGND; separates signal ground from power return path. |
| 4 FB | Feedback input for output voltage regulation | 1.24V regulation point; connect to GND for 3.3V fixed output; use resistor divider for adjustable outputs. |
| 5 OUT | IC power supply input | Supplied from POUT via 4.7Ω series resistor; bypassed with 0.68µF ceramic; powers internal circuitry. |
| 6 CLK/SEL | Mode selection & external clock input | Low = auto PFM/PWM; high = forced-PWM; external clock = synchronized PWM (500kHz–1.2MHz). |
| 7 PGND | Power ground (N-channel MOSFET source) | High-current return path for LX switching node; must be low-inductance connection to GND plane. |
| 8 LX | Switch node connection to inductor | Drives external 3.3µH inductor; carries high di/dt; requires short, wide trace and careful layout. |
| 9 POUT | Power output (P-channel rectifier source) | Delivers regulated output; connects to output capacitor and load; external Schottky required >4V. |
| 10 ON | Enable input (active-low) | Logic-low activates regulator; internal hysteresis (~0.15×VOUT); connect to GND for always-on operation. |
Key Features
| Feature | Design Value |
|---|---|
| Idle-Mode™ PFM/PWM transition | Automatically switches to discontinuous conduction (PFM) below ~10mA load, improving light-load efficiency without external control. |
| Synchronous rectification | Integrated P-channel MOSFET replaces external diode, boosting efficiency by ~5% and eliminating reverse-recovery losses. |
| Adjustable current limit & soft-start | ISET pin allows precise inductor current limiting (1.0–1.6A) and programmable soft-start time via RC network. |
| Low-noise forced-PWM operation | CLK/SEL = high forces constant 1MHz switching regardless of load, enabling predictable EMI filtering in RF systems. |
| External clock synchronization | Accepts 500kHz–1.2MHz external clock on CLK/SEL to align switching harmonics away from sensitive bands (e.g., GSM, Bluetooth). |
Applications
| Digital Cordless Phones | Wireless Handsets |
|---|---|
Use Scenario: Powering RF transceiver and baseband ICs from single NiMH cell (1.2V nominal) with tight ripple and noise constraints. IC Role / Device Role / Timing Role: Primary step-up regulator generating stable 3.3V rail for analog front-end and digital core. Use Value: Idle-Mode™ extends talk-time by minimizing quiescent draw during standby; 1MHz switching allows small 3.3µH inductor and low-profile layout. |
Use Scenario: Supplying 3.3V to Bluetooth/WiFi modules in compact handheld devices with variable battery voltage (1.0–1.4V under load). IC Role / Device Role / Timing Role: High-efficiency boost converter with synchronized-PWM mode to avoid interference with 2.4GHz ISM band. Use Value: External clock sync (500kHz–1.2MHz) shifts switching harmonics out of critical RF bands; <0.1µA shutdown current preserves battery during sleep. |
| Handheld Instruments | Palmtop Computers |
Use Scenario: Providing regulated 3.3V/5V rails for microcontroller, LCD, and sensor interfaces in portable test equipment powered by alkaline batteries. IC Role / Device Role / Timing Role: Main DC-DC converter supporting wide input (0.7–5.5V) and adjustable output to match multiple subsystem requirements. Use Value: Adjustable output (2.5–5.5V) via FB divider eliminates need for multiple regulators; 94% peak efficiency reduces thermal load in sealed enclosures. |
Use Scenario: Generating 3.3V system rail from single Li+ cell (2.7–4.2V) while maintaining low EMI for touch-screen and audio circuits. IC Role / Device Role / Timing Role: Low-noise synchronous boost converter with forced-PWM mode for consistent spectral profile during data transmission. Use Value: Forced-PWM operation ensures fixed 1MHz harmonics easily filtered with small LC components; soft-start prevents inrush into large system capacitance. |
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 |
|---|---|---|---|
| TPS61040DRBT | 500kHz fixed frequency, 28V max output, no external sync, lower max output current (280mA) | Lacks 1MHz operation and synchronization; suited for non-RF, cost-sensitive applications with lower current needs | Select when 1MHz noise control or >400mA output is not required; simpler design but less flexible in EMI-critical layouts |
| LT1930ES5#TRMPBF | 1.2MHz fixed frequency, no PFM mode, no adjustable current limit, SOT-23-5 package (5-pin) | Higher frequency but no light-load efficiency optimization; lacks ISET/soft-start flexibility and multi-mode control | Choose for ultra-small footprint where Idle-Mode™ and programmable features are secondary to size and basic boost functionality |
Compared with TPS61040DRBT and LT1930ES5#TRMPBF, the MAX1760EUB+ uniquely combines 1MHz forced-PWM, external clock sync, Idle-Mode™ efficiency scaling, and full programmability (ISET, soft-start, output voltage) in a 10-pin µMAX package - making it optimal for RF-sensitive, battery-constrained portable designs requiring both performance and design flexibility.
Availability
MAX1760EUB+ is available at Aetrix Electronics and suitable for digital cordless phones, wireless handsets, and handheld instruments requiring stable component supply, long battery runtime, and low-noise power conversion.
Supply support for MAX1760EUB+ 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, communications, and consumer applications.
The MAX1760EUB+ belongs to Maxim's low-noise, high-efficiency DC-DC converter product line, designed specifically for battery-powered wireless devices demanding extended runtime, minimal EMI, and robust low-voltage operation.
FAQ
What is the minimum input voltage required for MAX1760EUB+ to start up?
The MAX1760EUB+ guarantees startup at 1.1V input (typical) and remains operational down to 0.7V once running, thanks to its low-voltage startup oscillator and bootstrap power architecture from POUT through the OUT pin. This enables reliable operation from deeply discharged NiMH or alkaline cells. The MAX1760EUB+ achieves this using an internal CMOS oscillator that initiates switching before feedback regulation engages.
Does MAX1760EUB+ require an external Schottky diode, and if so, when?
Yes - an external 0.5A Schottky diode (e.g., MBR0520L) is required when the MAX1760EUB+ output exceeds 4V, or when starting from input voltages ≤1.8V. The on-chip P-channel synchronous rectifier cannot safely handle reverse recovery or high-voltage blocking above 4V; the external diode parallels POUT–LX to ensure proper startup and regulation. The MAX1760EUB+ datasheet explicitly mandates this for >4V outputs.
How does the CLK/SEL pin affect MAX1760EUB+ operation modes?
The CLK/SEL pin configures three distinct modes: logic-low selects auto-switching Idle-Mode™ (PFM at light loads, PWM at heavy loads); logic-high enables forced-PWM for constant 1MHz low-noise operation; and an external 500kHz–1.2MHz clock signal enables synchronized-PWM to avoid RF interference bands. Each mode directly impacts efficiency, EMI profile, and transient response - all confirmed in MAX1760EUB+ electrical characteristics and typical operating curves.
Can MAX1760EUB+ generate output voltages other than 3.3V?
Yes - the MAX1760EUB+ supports adjustable outputs from 2.5V to 5.5V using a resistor divider from POUT to GND connected to the FB pin, which regulates at 1.24V. For fixed 3.3V, FB is tied to GND. The MAX1760EUB+ datasheet provides the exact formula R1 = R2 × (VOUT − 1.24)/1.24 and specifies FB input leakage <20nA, ensuring accuracy with high-value resistors.
What is the purpose of the ISET pin on MAX1760EUB+ and how is it used?
The ISET pin on MAX1760EUB+ serves dual functions: setting the N-channel MOSFET current limit (1.0–1.6A) and implementing analog soft-start. Connecting ISET to REF sets maximum limit (1.25A); a resistive divider reduces it. Adding a capacitor from ISET to GND creates soft-start, with time constant tSS = RSS × CSS (RSS ≥470kΩ). During shutdown, MAX1760EUB+ discharges ISET internally via a 100kΩ switch.
MAX1760EUB+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm 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:
- 1A (Switch)
- Frequency - Switching:
- 1MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-uMAX/uSOP
MAX1760EUB+ FAQ
1.How can I place an order for MAX1760EUB+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1760EUB+ 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 MAX1760EUB+ reliable?
The price and inventory of MAX1760EUB+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1760EUB+ is usually 5 days.
3.What payment methods are accepted for MAX1760EUB+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1760EUB+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1760EUB+?
MAX1760EUB+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1760EUB+ 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 MAX1760EUB+?
For technical support, including MAX1760EUB+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1760EUB+ requirements.
6.How does Aetrix verify that MAX1760EUB+ is sourced from the original manufacturer or authorized distributors?
All MAX1760EUB+ 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 MAX1760EUB+ meets industry standards.
7.What is the process for return or replacement of MAX1760EUB+?
All MAX1760EUB+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX1760EUB+, 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 MAX1760EUB+ part is unused and in its original packaging.
Return procedure for MAX1760EUB+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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