My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX766ESA+T
- Part No.:
- MAX766ESA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX766ESA+T.pdf
- Description:
- IC REG BUCK BOOST ADJ/-1V 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,092
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX766ESA+T from Maxim Integrated is a high-efficiency, current-limited PFM inverting DC-DC converter delivering -15V fixed output or adjustable from -1V to -16V, with 250mA output current, 120µA max supply current, and 300kHz switching frequency-designed for LCD bias generation and portable instrumentation requiring compact, low-quiescent-power negative voltage rails.
For engineers reviewing the MAX766ESA+T datasheet, MAX766ESA+T pinout, MAX766ESA+T application, or MAX766ESA+T equivalent, key selection criteria include its internal P-channel MOSFET, -15V preset output (±4%), 3V–16V input range, shutdown current <5µA, and compatibility with standard 47µH surface-mount inductors in space-constrained designs.
Technical Context
The MAX766ESA+T employs a proprietary current-limited pulse-frequency modulation (PFM) control scheme that enforces a 16µs maximum on-time and 2.3µs minimum off-time, enabling high efficiency across light-to-heavy loads while maintaining ultra-low quiescent current. Its BiCMOS architecture integrates a 0.75A peak-current-rated internal P-channel power MOSFET and a precision 1.5V reference (±1.5% over temperature).
Operation relies on differential voltage sourcing: the IC draws power from V+ to VOUT, maximizing gate drive for the internal switch and minimizing on-resistance. Input-to-output differential is limited to 21V absolute, and the device supports both fixed-output mode (FB tied to REF) and adjustable mode via external resistor divider on FB/REF.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | -15V fixed (±4%), or adjustable from -1V to -16V using external resistors |
| Input Voltage Range | 3V to 16V - supports single-cell Li-ion up to 4S battery inputs |
| Max Output Current | 250mA at V+ = 5V; derates with higher |VOUT| or lower V+ |
| Supply Current | 120µA max (no load), enabling >1000-hour battery life in standby |
| Shutdown Current | ≤5µA - enables deep-sleep power management in portable systems |
| Switching Frequency | Up to 300kHz - allows use of <5mm-diameter SMT inductors without custom magnetics |
| Reference Voltage | 1.5V ±1.5% (−40°C to +85°C) - stable feedback for precise output regulation |
Pinout & Package
MAX766ESA+T is housed in an 8-pin SO (Small Outline) package, 150mil width, RoHS-compliant, with exposed pad not electrically connected. Pin 1 is OUT; pin 5 is GND; pins 6 and 7 are V+ (must be tied together); pin 8 is LX.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT (Pin 1) | Inverting output node | Connects to negative output rail; senses VOUT for fixed-mode regulation when tied to FB |
| GND (Pin 5) | Power and signal reference | Star-ground connection point for input/output capacitors and feedback network |
| V+ (Pins 6, 7) | Positive supply input | Dual-pin configuration requires parallel connection; bypass with 0.1µF capacitor near pins |
| LX (Pin 8) | Drain of internal P-MOSFET | Swings from V+ to |VOUT| + diode drop; drives external inductor; peak current limited to 0.75A |
| REF (Pin 4) | 1.5V precision reference output | Sources up to 100µA; must be bypassed with 0.1µF capacitor for stability |
| SHDN (Pin 3) | Active-high shutdown control | TTL/CMOS-compatible; pulls supply current to <5µA when high; tie to GND for normal operation |
| FB (Pin 2) | Feedback input | Connect to REF for -15V fixed output; connect external resistor divider for adjustable output |
Key Features
| Feature | Design Value |
|---|---|
| Current-limited PFM control | Enables >80% efficiency from 1mA to 250mA load while maintaining <120µA no-load IQ |
| Integrated P-channel MOSFET | Eliminates external switch; reduces BOM count and layout area for ≤250mA applications |
| Dual-mode output configuration | Supports factory-preset -15V or user-adjustable -1V to -16V via two resistors - no requalification needed |
| High-voltage differential operation | Supports up to 21V VIN–VOUT differential - enables wide input/output combinations (e.g., 15V in → -6V out) |
| Thermal robustness | Specified from −40°C to +85°C ambient; junction temperature rated to +150°C |
Applications
| LCD Bias Generation | Portable Instrumentation |
|---|---|
Use Scenario: Generating stable negative bias voltage for TFT-LCD source driver ICs in handheld medical monitors and industrial HMIs. IC Role / Device Role / Timing Role: Inverting DC-DC converter providing regulated -15V rail with low ripple and fast transient response to dynamic pixel loading. Use Value: Enables compact, battery-efficient display subsystems using only a 47µH inductor and Schottky diode - no transformer or charge pump required. |
Use Scenario: Powering analog front-end circuitry (op-amps, ADCs, sensors) in handheld multimeters and portable data loggers. IC Role / Device Role / Timing Role: Negative voltage generator supplying clean, low-noise -15V for dual-supply op-amps and precision references. Use Value: Delivers 250mA at <120µA quiescent current - extends alkaline/Li-ion battery life by >3× versus PWM alternatives. |
| LAN Adapter Power | Battery-Powered Remote DAQ |
Use Scenario: Providing isolated negative supply for RS-485 transceivers and Ethernet PHY bias in compact USB-to-Ethernet adapters. IC Role / Device Role / Timing Role: Compact inverter powering RS-485 driver stages requiring symmetric ±12V or ±15V rails. Use Value: Meets EN55022 Class B EMI limits due to controlled 300kHz switching and minimal external components - simplifies EMC certification. |
Use Scenario: Supplying negative rail for low-power microcontroller-based sensor nodes deployed in remote environmental monitoring. IC Role / Device Role / Timing Role: Efficient negative voltage source enabling true bipolar signal conditioning in energy-harvesting or coin-cell-powered systems. Use Value: Achieves <5µA shutdown current - allows multi-year operation on CR2032 cells when paired with MCU sleep modes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar inverting DC-DC converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX776ESA+ | Same pinout, -15V fixed output, but uses external P-MOSFET; supports up to 5W output | Required for >250mA loads or higher efficiency at full load; needs external FET and gate driver | Select MAX776ESA+ when output current exceeds 250mA or thermal constraints demand external switch dissipation |
| LM2662MX/NOPB | Charge-pump inverter; no inductor; 100mA max output; 99% typical efficiency at light loads | Lower noise, smaller footprint, but limited to ≤-7V and <100mA; unsuitable for high-current or low-ripple apps | Choose LM2662MX/NOPB for ultra-low-noise, low-current (<100mA), inductor-free designs where -15V is not required |
Compared with MAX776ESA+, the MAX766ESA+ offers lower component count and simpler layout for ≤250mA applications, while LM2662MX/NOPB provides inductorless operation at the cost of output voltage and current capability - making MAX766ESA+ optimal for mid-power, space-constrained negative rail generation.
Availability
MAX766ESA+T is available at Aetrix Electronics and suitable for LCD bias generation, portable instrumentation, LAN adapter power, and battery-powered remote data-acquisition systems requiring stable component supply, long-term lifecycle support, and guaranteed RoHS-compliant sourcing.
Supply support for MAX766ESA+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, automotive, and communications markets.
The MAX764/MAX765/MAX766 family was designed specifically for compact, high-efficiency negative voltage generation in battery-powered and space-constrained systems - emphasizing ultra-low quiescent current, integrated power switches, and simplified magnetics design.
FAQ
What output voltage does the MAX766ESA+T provide by default?
The MAX766ESA+T provides a factory-preset -15V output voltage with ±4% tolerance under nominal conditions. This fixed output is achieved by connecting the FB pin to the REF pin internally during manufacturing. The device also supports adjustable operation from -1V to -16V using an external resistor divider between FB and REF, with VREF = 1.5V as the feedback reference point.
Can the MAX766ESA+T operate with a 3.3V input to generate -15V?
No - the MAX766ESA+T cannot reliably generate -15V from a 3.3V input. Its absolute maximum V+–VOUT differential is 21V, but practical operation requires sufficient headroom for regulation. At V+ = 3.3V, the maximum achievable |VOUT| is approximately -5V. For -15V output, V+ must be ≥4.5V (per Typical Operating Characteristics graphs), with recommended minimum of 5V to ensure stable regulation and 250mA capability.
Does the MAX766ESA+T require an external MOSFET?
No, the MAX766ESA+T does not require an external MOSFET. It integrates a P-channel power MOSFET with 0.75A peak current capability and 2.5Ω typical on-resistance. This internal switch enables complete inverting DC-DC conversion with only an inductor, Schottky diode, and two capacitors - reducing bill-of-materials count and PCB area versus controllers like the MAX776ESA+ that require external FETs.
What is the shutdown behavior of the MAX766ESA+T?
When SHDN is driven high (≥1.6V), the MAX766ESA+T enters shutdown mode, disabling the internal oscillator, reference, and power switch. Supply current drops to ≤5µA, and the OUT pin discharges to ground through internal circuitry. The device resumes normal operation within 2ms after SHDN is pulled low (≤0.4V), with soft-start behavior preventing output voltage overshoot during wake-up.
Which inductor value is recommended for the MAX766ESA+T?
A 47µH surface-mount inductor is the recommended standard value for the MAX766ESA+T across most applications. It provides optimal balance of size, efficiency, and transient response. Inductors must support ≥0.75A peak current, have low DC resistance (<100mΩ preferred), and use ferrite or equivalent core material. Suggested part families include Coilcraft D03316, Sumida CD75, or Matsuo 267 series - all validated for ≤5mm diameter and ≤300kHz operation.
MAX766ESA+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Up/Step-Down
- Output Configuration:
- Negative
- Topology:
- Buck-Boost
- Output Type:
- Adjustable (Fixed)
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3V
- Voltage - Input (Max):
- 16V
- Voltage - Output (Min/Fixed):
- -1V (-15V)
- Voltage - Output (Max):
- -16V
- Current - Output:
- 105mA
- Frequency - Switching:
- 300kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MAX766ESA+T FAQ
1.How can I place an order for MAX766ESA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX766ESA+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 MAX766ESA+T reliable?
The price and inventory of MAX766ESA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX766ESA+T is usually 5 days.
3.What payment methods are accepted for MAX766ESA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX766ESA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX766ESA+T?
MAX766ESA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX766ESA+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 MAX766ESA+T?
For technical support, including MAX766ESA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX766ESA+T requirements.
6.How does Aetrix verify that MAX766ESA+T is sourced from the original manufacturer or authorized distributors?
All MAX766ESA+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 MAX766ESA+T meets industry standards.
7.What is the process for return or replacement of MAX766ESA+T?
All MAX766ESA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX766ESA+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 MAX766ESA+T part is unused and in its original packaging.
Return procedure for MAX766ESA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX766ESA+T Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
