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Analog Devices Inc./Maxim Integrated MAX1701EEE+
- Part No.:
- MAX1701EEE+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
MAX1701EEE+.pdf
- Description:
- IC REG BOOST ADJ 1.1A 16QSOP
- Quantity:
- Payment:
- Shipping:
Inventory:200
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Product details
Overview
MAX1701EEE+ 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 adjustable 2.5V–5.5V from 0.7V–5.5V input (1–3 NiCd/NiMH or 1 Li-ion cell), features integrated 1A N-channel switch and 250mΩ P-channel synchronous rectifier, and supports PWM/PFM dual-mode operation - used in PCS phones, palmtop computers, and wireless handsets.
For engineers reviewing the MAX1701EEE+ datasheet, MAX1701EEE+ pinout, MAX1701EEE+ application, or MAX1701EEE+ equivalent, key selection considerations include guaranteed 1.1V start-up voltage, 3µA shutdown current, power-good (POK) and low-battery comparator outputs, uncommitted gain block for linear regulator extension, and QSOP-16 package compatibility with space-constrained portable designs.
Technical Context
The MAX1701EEE+ implements a synchronous-rectified PWM/PFM boost topology with internal 300kHz oscillator (or external clock synchronization from 200–400kHz). Its control architecture includes dual shutdown inputs (ONA/ONB), feedback regulation via FB pin with 1.25V reference, and independent comparators for power-good (POK) and low-battery detection (LBO/LBP/LBN).
It integrates a transconductance gain block (9mmho) with open-drain AO output, supports fixed 3.3V or adjustable output via resistor divider, and maintains regulation down to 0.7V input through bootstrapped IC supply from OUT pin - enabling deep discharge battery operation in handheld instruments and two-way pagers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 0.7V to 5.5V - supports single Li-ion or 1–3 NiCd/NiMH cells, including deep-discharge operation after start-up. |
| Output Voltage Range | Adjustable 2.5V to 5.5V - set via external resistor divider on FB pin; fixed 3.3V option by grounding FB. |
| Max Output Current | 800mA in PWM mode - enabled when CLK/SEL = high; limited to 100mA in low-power PFM mode. |
| Start-Up Voltage | 1.1V minimum at +25°C - guaranteed CMOS low-voltage oscillator enables reliable cold-start from weak batteries. |
| Shutdown Current | 3µA typical - achieved with logic-controlled ONB/ONA combination; preserves battery life during standby. |
| Efficiency | Up to 96% - enabled by synchronous rectification (250mΩ P-ch rectifier + 130mΩ N-ch switch) and PFM light-load optimization. |
| Reference Voltage | 1.25V ±1% - precision bandgap reference (REF pin) with ≤5mV input offset, stable over -40°C to +85°C. |
Pinout & Package
MAX1701EEE+ is housed in a 16-pin QSOP package (5.3mm × 10.2mm, 0.65mm pitch), pin-compatible with industry-standard 16-pin SOIC footprints but occupying same board area as an 8-pin SO.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| LBP | Low-battery comparator non-inverting input | Accepts external voltage divider for battery monitoring; 15mV hysteresis ensures stable threshold detection. |
| LBN | Low-battery comparator inverting input | Connected to REF (1.25V) or external reference; common-mode range 0.5V–1.5V supports flexible trip-point design. |
| REF | Precision 1.25V bandgap reference output | Sources up to 50µA; requires 0.22µF bypass within 5mm for stability and noise immunity. |
| CLK/SEL | Mode selection & external clock sync input | Logic-low = PFM low-power mode; logic-high = 300kHz PWM; external clock = 200–400kHz synchronized operation. |
| POK | Power-good open-drain output | Pulls low when VOUT drops >10% below regulation point; no internal delay - enables fast system fault response. |
| LBO | Low-battery comparator open-drain output | Sinks ≥1mA; active-low signal for MCU interrupt or load disable during battery depletion. |
| AO | Gain block output (open-drain N-ch) | Drives external P-channel pass FET gate; transconductance = 9mmho - enables linear regulator extension. |
| AIN | Gain block inverting input | Used with REF to form error amplifier; supports output voltage monitoring or custom regulation loops. |
| FB | Feedback input for output voltage regulation | Compares divided output against 1.25V reference; input bias <20nA allows high-impedance resistor dividers. |
| PGND | Power ground for high-current switch paths | Separate from signal GND to minimize noise coupling into sensitive analog blocks (REF, comparators). |
| LX | Switch node (N-ch drain / P-ch source) | Connects to inductor and Schottky diode; high dv/dt node requiring tight layout and low-inductance routing. |
| OUT | IC power supply input (bootstrapped) | Derives internal bias from output rail; enables operation down to 0.7V input once regulation is established. |
| POUT | Boost output connection point | High-current output terminal; connects to output capacitor and load; internal P-ch rectifier source tied here. |
| ONA / ONB | Dual logic-controlled enable inputs | Independent control: ONA=high or ONB=low → ON; ONA=low & ONB=high → OFF; hysteresis ~0.15×VOUT. |
| GND | Signal ground reference | Return path for REF, FB, comparators, and logic; must be connected to PGND at single point near IC. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous rectification | Integrated 250mΩ P-channel rectifier improves efficiency by 5% vs. diode-based boost converters - extending battery runtime in portable RF systems. |
| Dual operating modes | PWM (300kHz fixed frequency) for low-noise full-power delivery; PFM for ultra-low quiescent current (200µW) at light loads - adaptive for burst-mode communication. |
| Power-good and low-battery outputs | Dedicated open-drain POK and LBO signals provide real-time system-level status without external components - simplifying host MCU monitoring. |
| Uncommitted gain block | Transconductance amplifier (9mmho) with AO/AIN pins enables configurable linear post-regulation or arbitrary voltage monitoring - adding flexibility beyond basic boost function. |
| Guaranteed low-voltage start-up | 1.1V minimum start-up at +25°C using dedicated CMOS oscillator - ensures reliable power-on from partially discharged batteries in cordless phones and pagers. |
Applications
| Digital Cordless Phones | Personal Communicators |
|---|---|
Use Scenario: Powering RF front-end and baseband ICs from single NiMH cell with strict EMI limits. IC Role / Device Role / Timing Role: Primary step-up regulator delivering clean 3.3V/5V rails; synchronizable to avoid IF band interference. Use Value: 96% efficiency and 300kHz PWM reduce thermal load and radiated noise; PFM mode extends talk time during standby. |
Use Scenario: Supplying processor, display, and Bluetooth module in compact handheld PDAs. IC Role / Device Role / Timing Role: System power manager with dual enable controls (ONA/ONB) for coordinated sleep/wake sequencing. Use Value: 3µA shutdown current minimizes battery drain during off periods; adjustable output supports multiple voltage domains. |
| Palmtop Computers | Wireless Handsets |
Use Scenario: Generating stable 5V for USB peripherals and 3.3V for memory from aging Li-ion battery. IC Role / Device Role / Timing Role: Adaptive boost converter with REF and FB pins enabling precise closed-loop regulation across battery discharge curve. Use Value: Operation down to 0.7V input preserves usable capacity; 1.25V reference accuracy ±1% ensures consistent system voltage margins. |
Use Scenario: Supporting GSM/PCS transmit bursts requiring high peak current without voltage droop. IC Role / Device Role / Timing Role: High-current (800mA) boost stage with fast transient response; LX node optimized for low-inductance PCB layout. Use Value: Synchronous rectification and low RDS(on) switches maintain output stability during 2A peak inductor current events. |
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 |
|---|---|---|---|
| MAX1700EEE+ | No low-battery comparator, no POK, no gain block; identical boost core, pinout, and electrical specs otherwise. | Suitable only where system-level battery monitoring and power sequencing are handled externally. | Select when cost sensitivity outweighs need for integrated monitoring functions. |
| TPS61040DRVR | Single enable pin, no dual ONA/ONB logic; 28V max VOUT; lower 500mA IOUT rating; no POK/LBO outputs. | Targeted at general-purpose boost needs (e.g., white LED drivers), not RF-critical battery systems. | Choose for simpler control interface and higher output voltage range, accepting reduced integration. |
Compared with MAX1700EEE+, the MAX1701EEE+ adds critical system-monitoring functions (POK, LBO, gain block) without sacrificing efficiency or footprint; versus TPS61040DRVR, it provides superior RF-noise performance, dual enable logic, and tighter regulation for battery-sensitive wireless platforms.
Availability
MAX1701EEE+ is available at Aetrix Electronics and suitable for digital cordless phones, personal communicators, and wireless handsets requiring stable component supply, long-term lifecycle support, and guaranteed -40°C to +85°C industrial temperature operation.
Supply support for MAX1701EEE+ 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, communications, and consumer applications.
The MAX1700/MAX1701 family was designed specifically for low-noise, high-efficiency power conversion in battery-powered wireless equipment - emphasizing start-up reliability, light-load efficiency, and integrated system supervision.
FAQ
What is the minimum input voltage required to start the MAX1701EEE+?
The MAX1701EEE+ guarantees start-up from 1.1V at +25°C using its dedicated low-voltage oscillator. Once regulation is established, it continues operating down to 0.7V input due to bootstrapped power from the OUT pin - making it ideal for deeply discharged battery scenarios in palmtop computers and two-way pagers.
How does the MAX1701EEE+ achieve higher efficiency than non-synchronous boost converters?
The MAX1701EEE+ integrates a 250mΩ P-channel synchronous rectifier alongside its 130mΩ N-channel main switch, eliminating the forward voltage drop of an external Schottky diode. This reduces conduction losses and delivers up to 5% higher efficiency - especially critical in battery-powered wireless handsets where every milliwatt extends operational time.
Can the MAX1701EEE+ generate a fixed 3.3V output without external resistors?
Yes - connecting the FB pin directly to GND configures the MAX1701EEE+ for a fixed 3.3V output. The internal 1.25V reference and feedback amplifier regulate to this preset value; no external resistor divider is needed, simplifying BOM and layout for standard voltage rail generation in digital cordless phones.
What is the function of the CLK/SEL pin on the MAX1701EEE+?
The CLK/SEL pin on the MAX1701EEE+ selects operating mode: logic-low enables low-power PFM mode (≤100mA, 200µW quiescent); logic-high activates 300kHz PWM mode (up to 800mA, low-noise); applying an external 200–400kHz clock synchronizes switching to avoid RF interference bands in PCS phones and personal communicators.
Does the MAX1701EEE+ include protection features beyond overcurrent limiting?
Yes - the MAX1701EEE+ incorporates undervoltage lockout (2.0–2.3V output lockout threshold), thermal shutdown (junction limit +150°C), and robust absolute maximum ratings (e.g., LX to PGND = VPOUT+0.3V). Its POK output provides real-time power-good status, while the LBO signal enables early low-battery warning - all without external components.
MAX1701EEE+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 16-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Function:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Boost
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 0.7V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 2.2V
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 1.1A (Switch)
- Frequency - Switching:
- 300kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-QSOP
MAX1701EEE+ FAQ
1.How can I place an order for MAX1701EEE+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1701EEE+ 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 MAX1701EEE+ reliable?
The price and inventory of MAX1701EEE+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1701EEE+ is usually 5 days.
3.What payment methods are accepted for MAX1701EEE+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1701EEE+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1701EEE+?
MAX1701EEE+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1701EEE+ 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 MAX1701EEE+?
For technical support, including MAX1701EEE+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1701EEE+ requirements.
6.How does Aetrix verify that MAX1701EEE+ is sourced from the original manufacturer or authorized distributors?
All MAX1701EEE+ 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 MAX1701EEE+ meets industry standards.
7.What is the process for return or replacement of MAX1701EEE+?
All MAX1701EEE+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX1701EEE+, 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 MAX1701EEE+ part is unused and in its original packaging.
Return procedure for MAX1701EEE+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX1701EEE+ Tags
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