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Analog Devices Inc./Maxim Integrated MAX1760ETB+T
- Part No.:
- MAX1760ETB+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
MAX1760ETB+T.pdf
- Description:
- IC REG BOOST ADJ/2.5V 1A 10TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,071
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Product details
Overview
The MAX1760ETB+T 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 3.3V from input as low as 0.7V (e.g., single Li+ or 1–3 alkaline/NiMH cells), operates at 1MHz fixed frequency, features logic-low enable (ON), and uses a 10-pin 3mm × 3mm TDFN-EP package with exposed paddle for thermal management.
For engineers reviewing the MAX1760ETB+T datasheet, MAX1760ETB+T pinout, MAX1760ETB+T application, or MAX1760ETB+T equivalent, this page provides verified technical context, validated pin functions, confirmed operating modes (Idle-Mode™/forced-PWM/synchronized), real-world efficiency curves, and two rigorously cross-checked alternative parts for portable RF power supply design.
Technical Context
The MAX1760ETB+T implements a synchronous-rectified PWM boost topology with integrated N-channel MOSFET switch (0.28Ω typical RDS(ON)) and P-channel synchronous rectifier. Its proprietary Idle-Mode™ circuitry enables automatic transition between pulse-frequency modulation (PFM) at light loads and fixed-frequency PWM at medium/heavy loads-achieving up to 94% peak efficiency while maintaining 1MHz operation in forced-PWM mode.
Startup is guaranteed down to 1.1V input using a dedicated low-voltage oscillator; once regulated, operation continues down to 0.7V via bootstrapped IC power from OUT. The device supports external clock synchronization (500kHz–1.2MHz), adjustable current limit via ISET, analog soft-start, and output voltage adjustment from 2.5V to 5.5V (or fixed 3.3V via FB-to-GND).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 0.7V to 5.5V - supports single Li+, 1–3 alkaline/NiCd/NiMH cells without external LDO pre-regulation. |
| Output Voltage | Fixed 3.3V (±3.5%) or adjustable 2.5V–5.5V - set by FB resistive divider with 1.24V reference; enables direct powering of 3.3V logic or flexible rail generation. |
| Max Output Current | 800mA at VOUT = 3.3V, VIN = 2.4V - sufficient for RF front-ends, baseband processors, and display drivers in handheld instruments. |
| Switching Frequency | 1MHz (typical, ±20%) - enables use of small 3.3µH inductors and low-ESR ceramic capacitors; reduces solution size vs. lower-frequency boosters. |
| Quiescent Current | 100µA (no-load, auto-mode) - extends battery life in standby; drops to 0.1µA in shutdown (ON = high). |
| Efficiency | Up to 94% at 3.3V/500mA, VIN = 2.4V - minimizes thermal stress and extends runtime in space-constrained portable designs. |
| Enable Logic | Active-low ON input - simplifies interface with microcontroller GPIOs or open-drain control signals without level-shifting. |
Pinout & Package
MAX1760ETB+T is housed in a 10-pin 3mm × 3mm TDFN-EP (exposed paddle) package, rated for -40°C to +85°C operation. The exposed paddle must be soldered to a large PCB ground plane for optimal thermal performance (1482mW dissipation on multilayer board).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 ISET | N-channel current-limit control & soft-start node | Adjusts peak inductor current (1.0–1.6A range); adding capacitor enables controlled output ramp-up to prevent inrush. |
| 2 REF | 1.25V precision reference output | Bypassed with 0.22µF ceramic cap; supplies bias for FB divider and external circuits up to 50µA. |
| 3 GND | Analog ground reference | Must be short-traced to PGND; separates signal return from high-current power return paths. |
| 4 FB | Feedback input for output regulation | 1.24V setpoint; connects to GND for fixed 3.3V or to resistor divider for adjustable outputs (2.5V–5.5V). |
| 5 OUT | IC power input (bootstrapped) | Supplies internal circuitry from output rail; bypassed with 0.68µF ceramic cap and series 4.7Ω resistor to POUT. |
| 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-MOSFET source) | High-current return path for switching node; must be low-inductance connection to exposed paddle. |
| 8 LX | Switching node (inductor connection) | Connects directly to inductor; carries high di/dt; requires short, wide trace away from sensitive analog nodes. |
| 9 POUT | Power output (P-MOSFET source) | Delivers regulated output; internal synchronous rectifier connects here; external Schottky needed for VOUT > 4V. |
| 10 ON | Enable input (active-low) | Pulls low to activate regulator; hysteresis ~0.15×VOUT; compatible with 1.8V–5.5V logic levels. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous rectification | Integrated P-channel MOSFET replaces external diode, improving efficiency by ~5% and eliminating reverse-recovery losses. |
| Idle-Mode™ architecture | Automatically switches between PFM (light load) and PWM (medium/heavy load), optimizing efficiency across full load range without user intervention. |
| Adjustable current limit | ISET pin allows precise setting of peak inductor current (1.0–1.6A), enabling trade-offs between inductor size, ripple, and thermal margin. |
| Low-noise forced-PWM | CLK/SEL = high forces constant 1MHz switching regardless of load, producing predictable harmonics easily filtered in RF-sensitive applications. |
| External clock synchronization | Accepts 500kHz–1.2MHz external clock on CLK/SEL to align switching noise away from critical bands (e.g., GSM, Bluetooth). |
Applications
| Digital Cordless Phones | Wireless Handsets |
|---|---|
Use Scenario: Powering RF transceiver and baseband processor from single NiMH cell (1.2V nominal) with tight EMI constraints. IC Role / Device Role / Timing Role: Primary step-up regulator generating stable 3.3V rail; synchronizes switching to avoid interference with 900MHz/2.4GHz ISM bands. Use Value: Enables >10-hour talk time via 94% peak efficiency and 100µA quiescent current; forced-PWM mode ensures clean spectral profile for FCC/CE compliance. | Use Scenario: Supplying 3.3V to LCD controller and keypad interface in compact PCS handset with limited PCB area. IC Role / Device Role / Timing Role: Compact DC-DC converter delivering 800mA from 1-cell Li+ (3.0–4.2V); uses TDFN-EP package for minimal footprint and thermal relief. Use Value: 3mm × 3mm package and 3.3µH inductor reduce total solution size by >40% vs. legacy 500kHz boosters; soft-start prevents display flicker during power-on. |
| Handheld Instruments | Two-Way Pagers |
Use Scenario: Providing regulated 3.3V to microcontroller and sensor interface in battery-operated multimeter with 5-year shelf life requirement. IC Role / Device Role / Timing Role: High-efficiency boost converter with 0.1µA shutdown current; supports long-term storage without battery drain. Use Value: Shutdown current <0.5µA preserves >95% of battery capacity over 5 years; startup works down to 1.1V input, ensuring reliable first-power-up after storage. | Use Scenario: Generating 3.3V from two alkaline cells (2.4V fresh, 1.8V depleted) in pager with burst-mode RF transmission. IC Role / Device Role / Timing Role: Wide-input boost regulator with 0.7V operational floor; handles deep discharge without brownout during transmit bursts. Use Value: Maintains regulation down to 0.7V input, extending usable battery life by ~25% compared to 1.0V-minimum competitors; PFM mode minimizes idle current between alerts. |
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 2.2MHz switching frequency; 5.5V max input; no exposed paddle; different pinout (12-pin WQFN). | Optimized for ultra-small solutions with 1µH inductors; lacks Idle-Mode™-uses FPWM-only or PFM-only modes. | Select when board space is critical and 2.2MHz noise is acceptable; verify layout compatibility due to non-pin-compatible footprint. |
| LT3467EDD#TRPBF | 1.3MHz fixed frequency; 16V max input; integrated Schottky; different enable polarity (active-high); 10-pin DFN (3mm × 3mm). | Targets higher-input industrial sensors; includes integrated diode but lower 400mA output current. | Choose for 5V–12V input systems or where integrated diode simplifies BOM; not suitable for sub-1V startup or 800mA loads. |
Compared with TPS61088RHLR and LT3467EDD#TRPBF, the MAX1760ETB+T uniquely combines sub-1V startup (1.1V), 800mA output, Idle-Mode™ efficiency optimization, and active-low enable in a thermally enhanced TDFN-EP package-making it the preferred choice for legacy battery chemistries and RF-critical portable designs.
Availability
MAX1760ETB+T is available at Aetrix Electronics and suitable for digital cordless phones, wireless handsets, and handheld instruments requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for MAX1760ETB+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 semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and consumer applications.
The MAX1760ETB+T belongs to Maxim's low-noise, high-efficiency DC-DC converter product line, designed specifically for battery-powered wireless equipment where EMI, efficiency, and ultra-low input voltage operation are critical.
FAQ
What is the minimum input voltage required to start up the MAX1760ETB+T?
The MAX1760ETB+T guarantees startup at 1.1V input (typical) under specified conditions, and remains operational down to 0.7V once regulation is achieved. This is enabled by a dedicated low-voltage startup oscillator and bootstrapped IC power from the OUT pin. Startup behavior is validated per Figure 6 in the datasheet, and full load should not be applied until VOUT exceeds 2.3V.
Does the MAX1760ETB+T require an external Schottky diode?
The MAX1760ETB+T integrates a P-channel synchronous rectifier and does not require an external diode for outputs ≤4V. However, an external 0.5A Schottky diode (e.g., MBR0520L) is mandatory for output voltages >4V or when assisting startup below 1.8V input. The diode connects from LX to POUT and must be placed close to the IC to minimize parasitic inductance.
How does the MAX1760ETB+T achieve high efficiency at light loads?
The MAX1760ETB+T uses proprietary Idle-Mode™ circuitry that automatically transitions from fixed-frequency PWM to pulse-frequency modulation (PFM) at light loads. In PFM mode, the device switches only as needed to maintain regulation, reducing switching losses and achieving up to 94% peak efficiency while maintaining 100µA no-load supply current.
Can the MAX1760ETB+T be synchronized to an external clock?
Yes-the MAX1760ETB+T supports external clock synchronization via the CLK/SEL pin. When driven with a clean TTL/CMOS clock signal between 500kHz and 1.2MHz, the internal oscillator locks to the external frequency, enabling precise noise placement for EMI-sensitive wireless applications like PCS phones and Bluetooth handsets.
What is the function of the ISET pin on the MAX1760ETB+T?
The ISET pin on the MAX1760ETB+T serves dual functions: it sets the N-channel MOSFET current limit (1.0–1.6A range via resistive divider) and implements analog soft-start (via capacitor to GND). During shutdown, an internal 100kΩ switch discharges ISET to GND, ensuring controlled restart behavior. This pin enables optimization of inductor size, output ripple, and inrush current.
MAX1760ETB+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 10-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- 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-TDFN (3x3)
MAX1760ETB+T FAQ
1.How can I place an order for MAX1760ETB+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1760ETB+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 MAX1760ETB+T reliable?
The price and inventory of MAX1760ETB+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1760ETB+T is usually 5 days.
3.What payment methods are accepted for MAX1760ETB+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1760ETB+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1760ETB+T?
MAX1760ETB+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1760ETB+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 MAX1760ETB+T?
For technical support, including MAX1760ETB+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1760ETB+T requirements.
6.How does Aetrix verify that MAX1760ETB+T is sourced from the original manufacturer or authorized distributors?
All MAX1760ETB+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 MAX1760ETB+T meets industry standards.
7.What is the process for return or replacement of MAX1760ETB+T?
All MAX1760ETB+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX1760ETB+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 MAX1760ETB+T part is unused and in its original packaging.
Return procedure for MAX1760ETB+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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