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Analog Devices Inc./Maxim Integrated MAX8569AEUT+T
- Part No.:
- MAX8569AEUT+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SOT-23-6
- Datasheet:
-
MAX8569AEUT+T.pdf
- Description:
- IC REG BOOST ADJ 750MA SOT6
- Quantity:
- Payment:
- Shipping:
Inventory:1,891
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Product details
Overview
MAX8569AEUT+T from Maxim Integrated is a 200mA adjustable-output synchronous boost regulator supporting 1.5V–5.5V input and up to 5.5V output, featuring 7µA quiescent current, 95% peak efficiency, and internal synchronous rectification. It operates in SOT23-6 package and enables battery-backed real-time clock or SRAM retention by connecting BATT directly to OUT during shutdown - ideal for space-constrained portable medical diagnostics and PDAs.
For engineers reviewing the MAX8569AEUT+T datasheet, MAX8569AEUT+T pinout, MAX8569AEUT+T application, or MAX8569AEUT+T equivalent, key selection criteria include its adjustable feedback threshold (1.228V), 750mA switch current limit, shutdown supply current <1µA, and compatibility with single-cell Li+, dual-alkaline, or dual-NiMH power sources.
Technical Context
The MAX8569AEUT+T uses a current-limited, oscillator-free control scheme: n-channel switch on-time terminates at either 750mA peak inductor current or 5µs maximum, followed by synchronous rectifier conduction until inductor current decays to zero. Regulation is maintained via error comparator monitoring of FB voltage against 1.228V reference.
During shutdown, an internal p-channel MOSFET connects BATT to OUT through the inductor, eliminating body-diode voltage drop and enabling direct battery backup for low-power peripherals. The SHDN pin doubles as low-battery cutoff with 1.228V threshold and 100mV hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 1.5V to 5.5V - supports single Li+ (2.7–4.2V), dual alkaline (2.0–3.2V), or dual NiMH (2.0–2.8V) without external LDO pre-regulation. |
| Output Current Capability | 200mA at VOUT = 3.3V, VBATT = 2.0V - sufficient to power microcontrollers, sensors, or RF modules in portable systems. |
| Quiescent Current | 7µA typical - minimizes battery drain in always-on monitoring circuits like medical wearables or smart sensors. |
| Shutdown Current | <1µA - enables multi-year operation from coin cells when paired with backup-critical loads (e.g., RTC, SRAM). |
| Feedback Reference Voltage | 1.228V ±0.025V - sets precise output voltage via external resistor divider; enables 2.0V–5.5V adjustment range. |
| Switch Current Limit | 750mA typical - defines maximum inductor peak current, constraining inductor size and thermal design for given output power. |
| Peak Efficiency | 95% at 40mA load, VBATT = 2.0V, VOUT = 3.3V - reduces heat generation and extends battery life in compact enclosures. |
Pinout & Package
MAX8569AEUT+T is housed in a lead-free 6-pin SOT23-6 package (U6FH-6), 2.9mm × 1.6mm × 1.1mm, with GND-connected exposed pad omitted (SOT23 variant). Pin 1 is SHDN; pin 3 is GND; pin 6 is FB. No EP pad; thermal performance relies on PCB copper area under pins 2 (BATT), 3 (GND), and 5 (OUT).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - SHDN | Active-low enable / low-battery detector input | Drives IC into sub-1µA shutdown; threshold = 1.228V with 100mV hysteresis - configurable as battery cutoff using external resistor divider. |
| 2 - BATT | Main power input | Accepts 1.5V–5.5V source; internally connected to OUT during shutdown to provide unregulated backup power without diode drop. |
| 3 - GND | Analog/digital ground reference | Single ground node for all internal circuitry; must be tied to low-impedance PCB ground plane within 5mm of CIN/COUT grounds. |
| 4 - LX | Switch node connection | Drives external inductor; connects to OUT during shutdown via internal p-MOSFET - requires short, low-inductance trace to minimize ringing. |
| 5 - OUT | Regulated output voltage | Delivers up to 200mA; supplies internal bootstrapped gate drive; bypassed with ≥10µF ceramic capacitor to stabilize regulation and reduce ripple. |
| 6 - FB | Feedback input | Senses output via resistor divider; regulates to 1.228V - determines output voltage as VOUT = 1.228V × (1 + R3/R4); high-impedance (4nA bias) minimizes divider current. |
Key Features
| Feature | Design Value |
|---|---|
| Internal synchronous rectifier | Eliminates external Schottky diode - reduces BOM count, PCB area, and forward-voltage loss, enabling >90% efficiency at light loads. |
| BATT-to-OUT connection in shutdown | Enables seamless battery backup for RTC/SRAM without external diodes or switches - preserves data during main converter disable. |
| Ultra-low 7µA quiescent current | Extends shelf life and operational runtime in intermittent-sensing applications (e.g., wireless sensor nodes, glucose monitors). |
| Adjustable output (2.0V–5.5V) | Supports diverse system rails (e.g., 2.5V analog, 3.3V logic, 5V USB-peripheral) using one footprint - no redesign needed for voltage changes. |
| 750mA switch current limit | Allows use of small 4.7µH–10µH inductors while delivering full 200mA output - simplifies magnetics selection and reduces solution height. |
Applications
| Medical Diagnostic Equipment | Digital Cameras |
|---|---|
Use Scenario: Portable ultrasound probe requiring stable 3.3V rail from two AA batteries during intermittent scanning. IC Role / Device Role / Timing Role: Primary step-up regulator supplying MCU, ADC, and transducer driver; maintains regulation down to 1.5V input. Use Value: 7µA quiescent current extends battery life between scans; BATT-to-OUT path powers RTC during standby without auxiliary cell. |
Use Scenario: Compact digital camera flash charging circuit needing 5V from 3.0V lithium polymer battery. IC Role / Device Role / Timing Role: Boost converter generating 5V for flash capacitor charging; enabled only during photo capture. Use Value: 95% peak efficiency minimizes heat near image sensor; 5µs max on-time enables fast transient response for burst-mode charging. |
| PDAs and Smartphones | Battery Backup Systems |
Use Scenario: Legacy PDA with 2.8V main processor and 3.3V peripheral interface powered from single-cell Li+. IC Role / Device Role / Timing Role: Local 3.3V supply generator; regulated output feeds SD card slot and USB PHY. Use Value: Adjustable FB allows re-use across multiple platforms; SOT23-6 footprint fits tight board areas near connectors. |
Use Scenario: Industrial controller retaining configuration and time during AC power loss using primary battery. IC Role / Device Role / Timing Role: Backup power manager connecting main battery to RTC/SRAM when main DC/DC is disabled. Use Value: Sub-1µA shutdown current prevents battery depletion over years; direct BATT-to-OUT path avoids 0.3V diode drop that would compromise RTC voltage margin. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar boost regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS610992DRCR | Fixed 3.3V output; 1.8V min input; 400mA output; 0.6µA shutdown current; 1.2MHz fixed-frequency PWM. | Lacks adjustable output and BATT-to-OUT backup path; better suited for ultra-low-IQ always-on apps where voltage is fixed. | Select if 3.3V-only output and lowest possible shutdown current are critical; avoid if backup power or voltage flexibility is required. |
| LT1945ES5#TRMPBF | Adjustable output (1.25V–15V); 1.5V min input; 250mA output; 25µA quiescent current; requires external Schottky diode. | Higher IQ and external diode increase solution size/cost; no integrated backup path; wider VOUT range. | Select if higher output voltage (>5.5V) or higher current (>200mA) is needed; accept larger footprint and lower efficiency vs. MAX8569AEUT+T. |
Compared with TPS610992DRCR and LT1945ES5#TRMPBF, MAX8569AEUT+T uniquely combines adjustable output, sub-1µA shutdown, and integrated BATT-to-OUT backup - making it optimal for portable devices requiring flexible rail generation and long-term data retention without added components.
Availability
MAX8569AEUT+T is available at Aetrix Electronics and suitable for medical diagnostics, portable imaging, and industrial backup power systems requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for MAX8569AEUT+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) designs precision analog, mixed-signal, and power-management ICs for demanding industrial, medical, and communications applications.
The MAX8569A series targets ultra-low-power portable electronics requiring high-efficiency step-up conversion from single- or dual-cell batteries, with emphasis on minimal quiescent current and integrated backup functionality.
FAQ
What is the minimum input voltage required for MAX8569AEUT+T to start switching?
The MAX8569AEUT+T starts switching at a minimum startup voltage of 1.24V (over temperature) when loaded with 2.6kΩ. At room temperature, startup occurs at 1.22V. This enables reliable operation from nearly depleted alkaline or NiMH cells, extending usable battery life beyond conventional boost converters with higher startup thresholds.
Can MAX8569AEUT+T generate a 5.0V output from a 3.3V input?
Yes, MAX8569AEUT+T can generate 5.0V from a 3.3V input. With its 1.5V–5.5V input range and adjustable output up to 5.5V, the device supports step-up ratios up to ~1.67×. For 5.0V output, configure the FB divider so VFB = 1.228V; typical efficiency exceeds 90% at moderate loads.
Does MAX8569AEUT+T include a power-on reset (RST) output?
No, MAX8569AEUT+T does not include an RST output. That feature is exclusive to the MAX8569B variants (e.g., MAX8569BEUT-T*). The MAX8569AEUT+T is the adjustable-output version and uses pin 6 solely as FB; RST is only present on MAX8569B packages where pin 6 is repurposed for reset signaling.
What is the recommended inductor value for MAX8569AEUT+T in a 3.3V-out, 200mA application?
A 10µH shielded power inductor with ≥750mA saturation current and ≤0.3Ω DCR is recommended for MAX8569AEUT+T at 3.3V/200mA. Values from 4.7µH to 22µH are acceptable; lower inductance improves transient response and reduces size, while higher values improve light-load efficiency but may limit peak current capability.
How does MAX8569AEUT+T achieve sub-1µA shutdown current?
MAX8569AEUT+T achieves <1µA shutdown current by fully disconnecting internal bias networks and disabling all switching elements. During shutdown, only leakage paths remain - including <0.01µA BATT supply current and <0.5µA OUT supply current - verified across -40°C to +85°C per datasheet Section "ELECTRICAL CHARACTERISTICS".
MAX8569AEUT+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Boost
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 1.5V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 2V
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 750mA (Switch)
- Frequency - Switching:
- -
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-6
MAX8569AEUT+T FAQ
1.How can I place an order for MAX8569AEUT+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8569AEUT+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 MAX8569AEUT+T reliable?
The price and inventory of MAX8569AEUT+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8569AEUT+T is usually 5 days.
3.What payment methods are accepted for MAX8569AEUT+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8569AEUT+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8569AEUT+T?
MAX8569AEUT+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8569AEUT+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 MAX8569AEUT+T?
For technical support, including MAX8569AEUT+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8569AEUT+T requirements.
6.How does Aetrix verify that MAX8569AEUT+T is sourced from the original manufacturer or authorized distributors?
All MAX8569AEUT+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 MAX8569AEUT+T meets industry standards.
7.What is the process for return or replacement of MAX8569AEUT+T?
All MAX8569AEUT+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX8569AEUT+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 MAX8569AEUT+T part is unused and in its original packaging.
Return procedure for MAX8569AEUT+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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