My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX1759EUB+T
- Part No.:
- MAX1759EUB+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX1759EUB+T.pdf
- Description:
- IC REG CHRG PUMP ADJ/3.3V 10UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:3,468
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX1759EUB+T from Maxim Integrated is a buck/boost regulating charge-pump DC-DC converter IC designed for single-cell Li+ or multi-cell NiMH/alkaline battery-powered portable equipment. It delivers a guaranteed 100mA output at 3.3V from 2.5V input, operates across 1.6V–5.5V input range, features Dual Mode™ fixed 3.3V or adjustable 2.5V–5.5V output, and maintains 50µA quiescent current at 1.5MHz switching frequency.
For engineers reviewing the MAX1759EUB+T datasheet, MAX1759EUB+T pinout, MAX1759EUB+T application, or MAX1759EUB+T equivalent, key selection criteria include its regulated buck/boost capability without inductors, ultra-low IQ operation, POK signaling, shutdown isolation, and µMAX package footprint for space-constrained handheld designs.
Technical Context
The MAX1759EUB+T implements a proprietary switched-capacitor architecture that dynamically selects between voltage-doubling (step-up) and gated-switch step-down modes based on real-time VIN vs. VOUT comparison. Internal sensing of FB voltage (1.235V nominal) and dual-mode threshold (±100mV hysteresis) enables seamless mode transition to sustain regulation under varying load and input conditions.
Its control logic integrates soft-start via foldback current limiting (110mA typ short-circuit limit), thermal shutdown with 20°C hysteresis (trip at 160°C), undervoltage lockout (VUVLO = 1.0V typ), and open-drain POK with 1.1V trip threshold referenced to FB. The 1.5MHz oscillator enables use of sub-1µF ceramic capacitors while minimizing EMI.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3V ±3.5% or adjustable 2.5V–5.5V via external resistor divider; enables single-part support for multiple rail requirements. |
| Max Output Current | 100mA continuous (guaranteed), 200mA transient peak; sufficient for microcontroller cores, RF transceivers, and small displays. |
| Input Voltage Range | 1.6V–5.5V; supports full discharge curve of single Li+ (2.7V–4.2V), two NiMH (2.0V–2.8V), or three alkaline (3.0V–4.5V) cells. |
| Quiescent Current | 50µA typical at 2V input; extends battery life in always-on or low-duty-cycle sensor nodes. |
| Shutdown Current | 1µA max; disconnects OUT from IN and disables all internal circuitry for zero-load battery drain. |
| Switching Frequency | 1.5MHz ±20%; allows use of 0.33µF ceramic transfer capacitor and compact 10µF input/output ceramics. |
| Power-OK Threshold | FB < 1.1V triggers POK sink; provides reliable power-good indication for system sequencers and brownout detection. |
Pinout & Package
The MAX1759EUB+T is housed in a 10-pin µMAX package (3mm × 3mm × 1.09mm, no exposed pad), optimized for high-density portable PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - POK | Open-drain power-good output | Sinks current when FB falls below 1.1V; requires external pull-up to VOUT for logic-level signal; high-impedance in shutdown. |
| 2 - SHDN | Active-low shutdown control | Drives low to disable all switching and reduce IQ to 1µA; OUT becomes high-impedance and isolated from IN. |
| 3,4 - IN | Main input supply terminals | Both pins must be connected together and bypassed to PGND with ≥10µF ceramic capacitor for stable operation. |
| 5 - GND | Analog ground reference | Connected to PGND via short trace; separates analog feedback path from high-current power return. |
| 6 - PGND | Power ground return | Carries pulsed charge-pump current; must be tied directly to GND with low-inductance connection. |
| 7 - CXN | Negative terminal of charge-pump capacitor | Connects to negative side of 0.33µF ceramic CX; forms flying capacitor node for voltage conversion. |
| 8 - CXP | Positive terminal of charge-pump capacitor | Connects to positive side of CX; alternately switched between IN and OUT to shuttle charge. |
| 9 - OUT | Regulated power output | Delivers up to 100mA; bypassed to PGND with ≥10µF ceramic capacitor to suppress ripple. |
| 10 - FB | Dual-mode feedback input | Tied to GND for 3.3V fixed output; connected to resistor divider for 2.5V–5.5V adjustment; 1.235V internal reference. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-Mode Output Regulation | Single device supports both fixed 3.3V and externally adjustable 2.5V–5.5V outputs via FB pin configuration-reduces BOM count across product variants. |
| Buck/Boost Without Inductors | Switched-capacitor topology eliminates magnetic components, reducing EMI, board area, and cost versus inductor-based DC-DC solutions. |
| Ultra-Low Quiescent Current | 50µA typical IQ enables >1-year battery life in coin-cell–powered IoT sensors operating at 1% duty cycle. |
| Integrated Protection | Foldback short-circuit limiting (110mA), thermal shutdown (160°C), and UVLO (1.0V) prevent damage during fault conditions without external circuitry. |
| High-Frequency Operation | 1.5MHz switching allows use of 0.33µF ceramic CX and 10µF ceramic CIN/COUT-enabling <15mm² total passive area including capacitors. |
Applications
| Wearable Health Monitors | Wireless Sensor Nodes |
|---|---|
Use Scenario: Compact wrist-worn pulse oximeter powered by a single CR2032 coin cell, requiring stable 3.3V for MCU, optical sensor, and BLE radio. IC Role / Device Role / Timing Role: Buck/boost regulator providing regulated 3.3V output independent of battery voltage decay from 3.0V to 2.0V. Use Value: Enables continuous 7-day operation by maintaining regulation down to 1.6V input and drawing only 50µA quiescent current during sleep. |
Use Scenario: Battery-powered environmental sensor node (temperature/humidity/pressure) transmitting data every 5 minutes via LoRaWAN. IC Role / Device Role / Timing Role: Primary power converter generating 3.3V from two AA alkaline cells (3.0V–4.5V range) with automatic mode switching. Use Value: Eliminates need for separate step-up and step-down converters-reducing bill-of-materials and PCB area while supporting full battery voltage range. |
| Medical Diagnostic Handhelds | Backup Power Translators |
Use Scenario: Portable glucose meter using single Li+ cell, where display backlight and ADC require stable 3.3V even at end-of-life battery voltage (~2.8V). IC Role / Device Role / Timing Role: Regulated charge pump delivering 100mA at 3.3V with <35mV ripple, enabling accurate 12-bit ADC measurements. Use Value: Maintains ADC reference stability and display contrast across entire battery discharge curve without voltage sag-induced measurement drift. |
Use Scenario: Industrial controller with backup supercapacitor bank (2.5V–3.0V) powering 3.3V logic during main supply interruption. IC Role / Device Role / Timing Role: Bidirectional translator boosting 2.5V supercap voltage to 3.3V system rail during brownout events. Use Value: Provides seamless failover with <100µs response time and no external MOSFETs-ensuring uninterrupted operation of critical control logic. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck/boost charge-pump applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS60403DBVR | Fixed 3.3V output only; 60mA max output; 2.7V–6.0V input; 1.2MHz switching; no POK or shutdown isolation. | Limited to low-power applications; lacks adjustable output and robust protection features. | Select when cost sensitivity outweighs output flexibility and protection requirements. |
| LT3467ES6#TRPBF | Inductor-based buck/boost; 400mA output; 1.5V–10V input; 1.2MHz; includes POK and soft-start; larger solution size. | Higher output current and wider input range, but requires inductor and larger footprint. | Select when >100mA load or >5.5V input is required and inductor use is acceptable. |
Compared with TPS60403DBVR and LT3467ES6#TRPBF, the MAX1759EUB+T uniquely balances 100mA output, true buck/boost operation without inductors, POK signaling, and 1µA shutdown-making it optimal for space- and battery-life–constrained portable medical and sensor devices.
Availability
MAX1759EUB+T is available at Aetrix Electronics and suitable for wearable health monitors, wireless sensor nodes, medical diagnostic handhelds, and backup power translators requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX1759EUB+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, medical, and consumer applications.
The MAX1759EUB+T belongs to Maxim's regulated charge-pump DC-DC converter family, engineered specifically for ultra-compact, battery-powered portable electronics needing efficient, inductorless voltage regulation across wide input ranges.
FAQ
What output voltage options does the MAX1759EUB+T support?
The MAX1759EUB+T supports two output configurations: fixed 3.3V (by connecting FB to GND) or adjustable 2.5V–5.5V (using an external resistor divider on FB). The internal feedback reference is 1.235V ±2.5%, and output accuracy is ±3.5% over temperature and line/load conditions. This Dual Mode™ capability allows one MAX1759EUB+T design to serve multiple voltage-rail requirements without changing the IC.
Can the MAX1759EUB+T operate from a single 1.5V alkaline cell?
No, the MAX1759EUB+T cannot operate from a single 1.5V alkaline cell. Its absolute minimum input voltage is 1.6V, and the undervoltage lockout activates below 1.0V. A single alkaline cell drops below 1.6V early in discharge, making it unsuitable. The MAX1759EUB+T is intended for two alkaline cells (3.0V–4.5V), one Li+ cell (2.7V–4.2V), or two/three NiMH cells (2.0V–2.8V or 3.0V–4.2V).
How does the MAX1759EUB+T achieve buck/boost functionality without an inductor?
The MAX1759EUB+T uses a switched-capacitor (charge-pump) architecture with an internal flying capacitor (CX). It alternately connects CX between input and output to either double voltage (step-up) or shuttle charge to regulate downward (step-down), depending on VIN vs. VOUT. This eliminates inductors while maintaining regulation-verified by its 1.5MHz operation and specified 0.33µF CX requirement in the datasheet.
What is the purpose of the POK pin on the MAX1759EUB+T?
The POK (Power-OK) pin on the MAX1759EUB+T is an open-drain output that sinks current when the FB voltage falls below 1.1V, indicating loss of output regulation. It requires an external pull-up resistor (10kΩ–1MΩ) to VOUT to generate a logic-high signal during normal operation. POK is high-impedance in shutdown mode and provides reliable power-good signaling for microcontroller reset sequencing or system-level brownout detection.
Does the MAX1759EUB+T provide output disconnection during shutdown?
Yes, the MAX1759EUB+T fully disconnects the output from the input during shutdown. When SHDN is driven low, the internal switches disable, OUT goes high-impedance, and leakage into OUT is limited to 5µA max. This prevents battery drain through downstream circuitry and ensures true zero-load operation-critical for long-term storage or maintenance-free battery-powered devices using the MAX1759EUB+T.
MAX1759EUB+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Up/Step-Down
- Output Configuration:
- Positive
- Topology:
- Charge Pump
- Output Type:
- Adjustable (Fixed)
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 1.6V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 2.5V (3.3V)
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 100mA
- Frequency - Switching:
- 1.5MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-uMAX/uSOP
MAX1759EUB+T FAQ
1.How can I place an order for MAX1759EUB+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1759EUB+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 MAX1759EUB+T reliable?
The price and inventory of MAX1759EUB+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1759EUB+T is usually 5 days.
3.What payment methods are accepted for MAX1759EUB+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1759EUB+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1759EUB+T?
MAX1759EUB+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1759EUB+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 MAX1759EUB+T?
For technical support, including MAX1759EUB+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1759EUB+T requirements.
6.How does Aetrix verify that MAX1759EUB+T is sourced from the original manufacturer or authorized distributors?
All MAX1759EUB+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 MAX1759EUB+T meets industry standards.
7.What is the process for return or replacement of MAX1759EUB+T?
All MAX1759EUB+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX1759EUB+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 MAX1759EUB+T part is unused and in its original packaging.
Return procedure for MAX1759EUB+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX1759EUB+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…
