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Analog Devices Inc./Maxim Integrated MAX1760HETB+
- Part No.:
- MAX1760HETB+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Special Purpose Regulators
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
MAX1760HETB+.pdf
- Description:
- MAX1760 0.8AMP, LOW-NOISE, 1MHZ,
- Quantity:
- Payment:
- Shipping:
Inventory:30,124
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Product details
Overview
The MAX1760HETB+ 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 voltages as low as 0.7V (e.g., single Li+ or 1–3 alkaline/NiMH cells), operates at 1MHz fixed frequency, features logic-high enable (ON), and uses proprietary Idle-Mode™ for light-load efficiency in handheld instruments and digital cordless phones.
For engineers reviewing the MAX1760HETB+ datasheet, MAX1760HETB+ pinout, MAX1760HETB+ application, or MAX1760HETB+ equivalent, key selection criteria include its 1MHz forced-PWM mode, adjustable current limit via ISET, 0.1µA shutdown current, TDFN-EP package thermal performance, and compatibility with low-voltage startup down to 0.9V.
Technical Context
The MAX1760HETB+ employs a synchronous-rectified PWM boost topology with integrated N-channel MOSFET and P-channel synchronous rectifier, enabling up to 94% efficiency. Its dual-mode operation-Idle-Mode™ for variable-frequency light loads and forced-PWM for constant 1MHz switching-is selected via CLK/SEL pin state.
Startup is managed by a dedicated low-voltage oscillator guaranteeing turn-on at ≥0.9V input; once regulated, it sustains operation down to 0.7V using bootstrapped IC power from OUT. Output voltage is fixed at 3.3V (FB grounded) or adjustable from 2.5V to 5.5V (via resistive divider), with FB regulation set at 1.24V ±0.025V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 0.7V to 5.5V - supports single Li+, 1–3 alkaline/NiMH cells without external LDO pre-regulation. |
| Output Current | Up to 800mA at 3.3V - sufficient for RF front-end biasing and baseband processors in PCS handsets. |
| Switching Frequency | 1MHz (typical) - enables use of compact 3.3µH inductors and reduces EMI fundamental below sensitive IF bands. |
| Efficiency | Up to 94% - achieved via synchronous rectification and optimized gate drive, minimizing conduction losses. |
| Shutdown Current | 0.1µA - extends battery life in standby modes of pagers and personal communicators. |
| Enable Logic | Logic-high ON - simplifies direct interfacing with 1.8V/3.3V microcontroller GPIOs without level-shifting. |
| Feedback Reference | 1.24V ±0.025V - ensures ±1.5% output voltage accuracy over temperature and load for stable analog supply rails. |
Pinout & Package
MAX1760HETB+ uses a 10-pin 3mm × 3mm TDFN-EP package with exposed paddle thermally connected to GND. The EP pad must be soldered to a large PCB ground plane for optimal thermal dissipation (1482mW max power on multilayer board).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 ISET | N-channel current limit control | Adjusts peak inductor current from 1.25A (REF-connected) down via resistor divider; also implements soft-start when capacitor added to GND. |
| 2 REF | 1.25V precision reference output | Bypassed with 0.22µF ceramic cap; sources ≤50µA; used for feedback divider bias and current-limit scaling. |
| 3 GND | Analog ground reference | Must be short-traced to PGND; separates signal return from high-current switch node paths. |
| 4 FB | Feedback input for output regulation | Set point = 1.24V; connect to GND for fixed 3.3V output; connect resistive divider for 2.5–5.5V adjustment. |
| 5 OUT | IC power supply input | Connected to POUT via 4.7Ω resistor; bypassed with 0.68µF ceramic cap; powers internal circuitry from regulated output. |
| 6 CLK/SEL | Mode selection and synchronization input | Low = Idle-Mode™; High = forced-PWM; external clock (500kHz–1.2MHz) = synchronized PWM. |
| 7 PGND | Power ground (N-MOSFET source) | High-current return path for switch node; must be low-inductance connection to EP pad and system GND. |
| 8 LX | Switch node | Connects to inductor; carries high di/dt; requires short, wide trace to minimize EMI and ringing. |
| 9 POUT | Power output (P-MOSFET source) | Delivers regulated output; connects to output capacitor and load; internal synchronous rectifier source terminal. |
| 10 ON | Enable input (logic-high active) | Pulls high to enable; internal hysteresis ≈0.15×VOUT; compatible with 1.8V/3.3V logic without external pull-up. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous rectification | Integrated P-channel MOSFET replaces Schottky diode, improving efficiency by ~5% and eliminating reverse-recovery loss. |
| Idle-Mode™ operation | Automatically transitions from fixed-frequency PWM to pulse-frequency modulation at light loads, reducing no-load supply current to 100µA. |
| Adjustable current limit | Peak inductor current scaled from 1.25A down via ISET voltage divider, enabling optimization of inductor size and transient response. |
| Analog soft-start | Controlled by RC time constant on ISET pin, preventing inrush current and output overshoot during power-up. |
| External clock synchronization | Accepts 500kHz–1.2MHz clock on CLK/SEL to align switching harmonics away from critical RF bands in wireless handsets. |
Applications
| Digital Cordless Phones | Wireless Handsets |
|---|---|
Use Scenario: Powering RF transceiver and baseband ASIC from single NiMH cell (1.2V nominal) with tight ripple and noise requirements. IC Role / Device Role / Timing Role: Step-up converter providing stable 3.3V rail with <50mVpp ripple and minimal conducted EMI near 900MHz ISM band. Use Value: Enables full RF transmit power without brownout; 1MHz switching avoids interference with IF stages and allows small 3.3µH inductor. | Use Scenario: Supplying 3.3V to GPS receiver and Bluetooth module in compact handheld asset tracker. IC Role / Device Role / Timing Role: Primary DC-DC regulator converting 1.0–2.4V battery voltage to regulated 3.3V under dynamic load (10mA–500mA pulses). Use Value: Idle-Mode™ maintains >85% efficiency at 10mA sleep current; forced-PWM mode ensures clean 3.3V during GPS acquisition bursts. |
| Palmtop Computers | Two-Way Pagers |
Use Scenario: Generating 5.0V for LCD backlight driver and 3.3V for CPU core from dual-cell alkaline (2.4V–3.2V) input. IC Role / Device Role / Timing Role: Adjustable-output boost converter configured for 5.0V output with external feedback divider; supports soft-start to prevent display flicker. Use Value: 2.5–5.5V output adjust range eliminates need for second regulator; 0.1µA shutdown extends shelf life in low-duty-cycle field devices. | Use Scenario: Providing 3.3V to pager RF front-end and microcontroller during brief receive windows (100ms every 2s). IC Role / Device Role / Timing Role: Ultra-low-quiescent-current boost converter activated only during scheduled receive slots via ON pin control. Use Value: 100µA no-load current and 0.1µA shutdown minimize average battery drain; fast startup (<2ms to 2.3V) ensures reliable message capture. |
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 |
|---|---|---|---|
| TPS61040DRBR | Fixed 2.5–5.5V adjustable output; 28V VSW rating; 0.65µA shutdown; no Idle-Mode™; 500kHz–3MHz programmable frequency. | Higher input voltage tolerance (up to 6V); lacks low-noise forced-PWM mode and synchronous rectifier efficiency gain. | Prefer when input may exceed 5.5V or when wider frequency tuning is needed; avoid if 1MHz EMI filtering or >90% light-load efficiency is critical. |
| LT1930ES5#TRMPBF | Fixed 3.3V/5V outputs; 40V VSW; 1.2MHz fixed frequency; no adjustable current limit; 2.5µA shutdown. | Higher voltage capability and smaller SOT-23-5 package; lacks ISET-based soft-start and precise 1.24V FB reference. | Choose for space-constrained designs needing basic 3.3V boost with minimal BOM; not suitable for battery voltage tracking or low-noise RF supply. |
Compared with TPS61040DRBR and LT1930ES5#TRMPBF, the MAX1760HETB+ uniquely combines 1MHz forced-PWM noise control, Idle-Mode™ efficiency optimization, and logic-high enable in a thermally enhanced TDFN-EP package-making it optimal for RF-sensitive, battery-limited handhelds where both quiescent current and EMI must be minimized.
Availability
MAX1760HETB+ is available at Aetrix Electronics and suitable for digital cordless phones, wireless handsets, and palmtop computers requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for MAX1760HETB+ 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 MAX1760HETB+ belongs to Maxim's low-noise, high-efficiency DC-DC converter product line, designed specifically for battery-powered wireless equipment where EMI, quiescent current, and startup voltage are critical constraints.
FAQ
What is the minimum input voltage required for the MAX1760HETB+ to start up?
The MAX1760HETB+ guarantees startup at an input voltage of 0.9V (typical) and 1.1V (maximum) across temperature, using its dedicated low-voltage oscillator. Once regulation is achieved, it continues operating down to 0.7V input due to bootstrapped power from the OUT pin. This makes the MAX1760HETB+ suitable for deeply discharged single-cell Li+ or NiMH batteries in handheld instruments.
How does the MAX1760HETB+ achieve low-noise operation in wireless applications?
The MAX1760HETB+ achieves low-noise operation through three key mechanisms: forced-PWM mode (CLK/SEL = HIGH) ensures constant 1MHz switching for predictable, filterable harmonics; synchronous rectification eliminates diode reverse-recovery noise; and the ability to synchronize to an external clock (500kHz–1.2MHz) allows alignment of switching edges away from sensitive RF bands. These features collectively reduce conducted and radiated EMI in PCS phones and Bluetooth handsets.
Can the MAX1760HETB+ be used with an output voltage higher than 4V?
Yes, but an external 0.5A Schottky diode (e.g., MBR0520L) must be connected from LX to POUT in parallel with the internal synchronous rectifier when the output voltage exceeds 4V. This is required because the internal P-channel MOSFET's VGS threshold limits safe operation above ~4V. The diode carries current during startup and after synchronous rectifier turn-off, and must be placed close to the IC to minimize parasitic inductance.
What is the function of the ISET pin on the MAX1760HETB+?
The ISET pin on the MAX1760HETB+ serves two critical functions: it sets the peak inductor current limit (1.25A when tied to REF, scalable downward via resistive divider) and implements analog soft-start (when a capacitor is connected from ISET to GND). During shutdown, an internal 100kΩ switch discharges ISET to GND, ensuring controlled restart behavior. This dual functionality allows designers to optimize inductor size, transient response, and inrush current simultaneously.
Is the MAX1760HETB+ pin-compatible with the MAX1760ETB+?
Yes, the MAX1760HETB+ is pin-compatible with the MAX1760ETB+, sharing identical TDFN-EP package, pinout, and electrical specifications-except for the ON pin logic polarity: MAX1760HETB+ uses logic-high enable, while MAX1760ETB+ uses logic-low enable. No PCB layout change is required; only the enable signal routing must be inverted to match the logic sense of the host controller.
MAX1760HETB+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 10-WFDFN Exposed Pad
- Packaging:
- Bulk
- Product Status:
- Active
- Applications:
- Converter, Battery Powered Devices
- Voltage - Input:
- 0.7V ~ 5.5V
- Number of Outputs:
- 1
- Voltage - Output:
- 2.5V ~ 3.3V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-TDFN-EP (3x3)
MAX1760HETB+ FAQ
1.How can I place an order for MAX1760HETB+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1760HETB+ 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 MAX1760HETB+ reliable?
The price and inventory of MAX1760HETB+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1760HETB+ is usually 5 days.
3.What payment methods are accepted for MAX1760HETB+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1760HETB+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1760HETB+?
MAX1760HETB+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1760HETB+ 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 MAX1760HETB+?
For technical support, including MAX1760HETB+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1760HETB+ requirements.
6.How does Aetrix verify that MAX1760HETB+ is sourced from the original manufacturer or authorized distributors?
All MAX1760HETB+ 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 MAX1760HETB+ meets industry standards.
7.What is the process for return or replacement of MAX1760HETB+?
All MAX1760HETB+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX1760HETB+, 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 MAX1760HETB+ part is unused and in its original packaging.
Return procedure for MAX1760HETB+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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