My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX765ESA+T
- Part No.:
- MAX765ESA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX765ESA+T.pdf
- Description:
- IC REG BUCK BOOST ADJ/-1V 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:5,110
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
The MAX765ESA+T from Maxim Integrated is a high-efficiency, current-limited pulse-frequency-modulated (PFM) inverting DC-DC converter delivering -12V output at up to 250mA, with 120µA max supply current and 3V–16V input range. It integrates a P-channel power MOSFET and operates up to 300kHz, enabling compact designs for battery-powered instrumentation and LCD bias generation.
For engineers reviewing the MAX765ESA+T datasheet, MAX765ESA+T pinout, MAX765ESA+T application, or MAX765ESA+T equivalent, key selection criteria include its fixed -12V output, internal switch, shutdown current ≤5µA, -40°C to +85°C temperature rating, and SO-8 package compatibility with standard surface-mount layouts.
Technical Context
The MAX765ESA+T uses a BiCMOS architecture with a proprietary current-limited PFM control scheme that enforces 16µs maximum on-time and 2.3µs minimum off-time, enabling >80% efficiency across load currents from 1mA to 250mA. Its internal P-channel MOSFET features 2.5Ω typical on-resistance and 0.75A peak current capability.
Operation relies on a 1.5V reference (±1% over temperature), feedback comparator referenced to REF, and LX node swinging between V+ and |VOUT| + diode drop - limiting VIN–VOUT differential to 21V absolute. Shutdown mode disables bias circuitry, reducing supply current to <5µA while discharging OUT to GND.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed -12V (±4% over load/temperature); no external resistor required for nominal operation |
| Max Output Current | 250mA at V+ = 5V; derates to ~150mA at V+ = 3V per datasheet graph |
| Supply Current | 120µA max (no load, full temp range); enables ultra-low-power standby in portable systems |
| Shutdown Current | ≤5µA (TA = -40°C to +85°C); ensures minimal battery drain during sleep modes |
| Switching Frequency | Up to 300kHz; allows use of <5mm-diameter SMT inductors (e.g., 47µH) without custom magnetics |
| Input Voltage Range | 3V to 16V; supports single-cell Li-ion (4.2V), dual-cell alkaline (3V), and industrial 12V rails |
| Efficiency | ≥82% at 100mA load and V+ = 5V; maintains >75% down to 1mA load due to PFM light-load optimization |
Pinout & Package
MAX765ESA+T is housed in an 8-pin SO (Small Outline) package, 3.9mm × 4.9mm body, 1.27mm pitch, RoHS-compliant, with exposed pad not electrically connected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 5) | Power and signal reference ground | Star-ground connection point for C1, C4, and FB network; critical for noise control |
| V+ (Pins 6,7) | Positive input supply rail | Dual-pin configuration lowers IR drop; requires 0.1µF ceramic bypass capacitor placed adjacent to pins |
| LX (Pin 8) | Drain of internal P-channel MOSFET | Swings from V+ (ON) to |VOUT| + diode drop (OFF); connects directly to inductor and catch diode anode |
| REF (Pin 4) | 1.5V precision reference output | Sources up to 100µA; must be bypassed with 0.1µF capacitor to stabilize feedback loop |
| SHDN (Pin 3) | Active-high TTL/CMOS shutdown control | Pulling high disables regulator and drops supply current to <5µA; tie to GND for normal operation |
| FB (Pin 2) | Inverting error amplifier input | Connected to REF for fixed -12V mode; accepts external divider for adjustable outputs (-1V to -16V) |
| OUT (Pin 1) | Output voltage sense and feedback path | Internally tied to output stage; used with FB/REF to close regulation loop in fixed-output configuration |
Key Features
| Feature | Design Value |
|---|---|
| Current-limited PFM control | Combines 16µs max on-time and 2.3µs min off-time with 0.75A peak current limit to sustain >80% efficiency from 1mA to full load |
| Integrated P-channel MOSFET | Eliminates external switch and gate driver; reduces BOM count and layout area while maintaining 2.5Ω typical RDS(ON) |
| Ultra-low quiescent current | 120µA max supply current enables multi-year battery life in remote data-acquisition sensors operating at µA average loads |
| Adjustable output capability | Supports -1V to -16V via two-resistor divider (R1 = 150kΩ, R2 = 150kΩ × |VOUT|/1.5V), retaining same IC across multiple voltage variants |
| Robust thermal performance | SO-8 package delivers 471mW continuous dissipation at +70°C (derates 5.88mW/°C above), suitable for sealed industrial enclosures |
Applications
| Portable Instruments | LCD-Bias Generators |
|---|---|
Use Scenario: Handheld multimeters and portable oscilloscopes requiring isolated negative rail for analog front-end op-amps and ADC references. IC Role / Device Role / Timing Role: Inverting DC-DC converter generating stable -12V from 3.3V or 5V main rail to power precision analog circuitry. Use Value: Enables true bipolar operation without external transformers; 120µA quiescent current extends battery runtime by >30% versus PWM alternatives. |
Use Scenario: TFT-LCD modules in medical displays and industrial HMIs needing negative gate drive voltage (VGL) for active-matrix pixel control. IC Role / Device Role / Timing Role: Fixed-output inverter supplying regulated -12V to LCD source/gate driver ICs with tight ripple tolerance (<50mV). Use Value: Delivers 250mA at >82% efficiency with 47µH inductor and 1N5817 Schottky, minimizing heat rise in space-constrained display bezels. |
| Battery-Powered Applications | Remote Data-Acquisition Systems |
Use Scenario: Wireless sensor nodes powered by AA/AAA cells or Li-SOCl₂ batteries operating in harsh environments (-40°C to +85°C). IC Role / Device Role / Timing Role: Primary negative voltage generator supporting RS-232 transceivers, op-amp rails, and sensor excitation circuits. Use Value: SO-8 package and -40°C to +85°C rating ensure reliable startup at low temperatures; 5µA shutdown current prevents battery depletion during long idle periods. |
Use Scenario: Solar-powered environmental monitors deployed in unattended field locations requiring decade-long deployment without maintenance. IC Role / Device Role / Timing Role: High-efficiency inverter powering -12V analog signal conditioning stages (e.g., instrumentation amplifiers, filters) from 3.6V Li-ion battery. Use Value: Maintains >75% efficiency even at 1mA load, minimizing energy waste during infrequent measurement cycles and extending operational lifetime. |
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 |
|---|---|---|---|
| MAX775ESA+ | Same -12V fixed output, but uses external P-channel MOSFET; supports up to 5W output power and higher current loads | Required when >250mA output or >16V VIN–VOUT differential is needed; adds external FET, driver, and layout complexity | Select MAX775ESA+ only if output current exceeds 250mA or input-to-output differential exceeds 20V |
| LT1931IS5#TRMPBF | Fixed -12V inverter with 1.25MHz switching frequency; 1.2mA typical quiescent current vs. 120µA for MAX765ESA+T | Better suited for space-constrained designs needing smaller inductors; less optimal for ultra-low-power battery operation | Choose LT1931IS5#TRMPBF when board area is critical and supply current >1µA is acceptable |
Compared with MAX765ESA+T, MAX775ESA+ offers higher power capability at the cost of added components and reduced integration, while LT1931IS5#TRMPBF trades 10× higher quiescent current for 4× higher switching frequency and smaller passive size - making MAX765ESA+T optimal for low-IQ, medium-power, cost-sensitive portable designs.
Availability
MAX765ESA+T is available at Aetrix Electronics and suitable for portable instruments, LCD-bias generators, and battery-powered applications requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX765ESA+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 low-quiescent-current, inverting DC-DC conversion in space- and power-constrained portable electronics - prioritizing integration, efficiency across wide load ranges, and robustness in variable-input environments.
FAQ
What output voltage does the MAX765ESA+T provide?
The MAX765ESA+T provides a fixed -12V output voltage with ±4% tolerance over temperature and load conditions. It achieves this using an internal resistor divider tied to the 1.5V reference; no external components are required for nominal operation. The device also supports adjustable outputs from -1V to -16V via external resistors R1 and R2 connected to the FB and REF pins, but the MAX765ESA+T variant is factory-configured and tested for -12V performance.
Can the MAX765ESA+T operate from a 3.3V input supply?
Yes, the MAX765ESA+T supports input voltages from 3V to 16V, so it can operate from a 3.3V supply. However, at V+ = 3.3V, the maximum output current is limited to approximately 80mA (per the "Maximum Output Current vs. Supply Voltage" graph), and efficiency drops to ~65% at 50mA load. For full 250mA capability, V+ ≥ 4.5V is recommended.
What is the shutdown current specification for MAX765ESA+T?
The MAX765ESA+T specifies a maximum shutdown current of 5µA over its full operating temperature range of -40°C to +85°C. This value is guaranteed in the Electrical Characteristics table under "ISHDN" parameter, measured with SHDN = V+ and V+ = 16V. At room temperature, typical shutdown current is <1µA, making it suitable for long-duration battery-powered sleep modes.
Does MAX765ESA+T require an external MOSFET?
No, the MAX765ESA+T integrates a P-channel power MOSFET internally - confirmed by the "Internal, P-Channel Power MOSFET" feature listing and block diagram. This eliminates the need for external switching elements, reducing bill-of-materials count and PCB area. External MOSFETs are only required for higher-power variants like the MAX775ESA+, which drives an external P-FET for up to 5W output.
What package type is used for MAX765ESA+T?
The MAX765ESA+T uses an 8-pin SO (Small Outline) package, also designated as SOIC-8 or SO-8, with 1.27mm lead pitch and 3.9mm × 4.9mm body dimensions. This is explicitly stated in the Ordering Information table where "MAX765ESA" maps to "8 SO" and "-40°C to +85°C" temperature grade. The "+T" suffix denotes tape-and-reel packaging for automated assembly.
MAX765ESA+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 (-12V)
- Voltage - Output (Max):
- -16V
- Current - Output:
- 120mA
- Frequency - Switching:
- 300kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MAX765ESA+T FAQ
1.How can I place an order for MAX765ESA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX765ESA+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 MAX765ESA+T reliable?
The price and inventory of MAX765ESA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX765ESA+T is usually 5 days.
3.What payment methods are accepted for MAX765ESA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX765ESA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX765ESA+T?
MAX765ESA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX765ESA+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 MAX765ESA+T?
For technical support, including MAX765ESA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX765ESA+T requirements.
6.How does Aetrix verify that MAX765ESA+T is sourced from the original manufacturer or authorized distributors?
All MAX765ESA+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 MAX765ESA+T meets industry standards.
7.What is the process for return or replacement of MAX765ESA+T?
All MAX765ESA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX765ESA+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 MAX765ESA+T part is unused and in its original packaging.
Return procedure for MAX765ESA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX765ESA+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…
