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Analog Devices Inc./Maxim Integrated MAX1706EEE
- Part No.:
- MAX1706EEE
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
MAX1706EEE.pdf
- Description:
- IC REG BOOST ADJ 550MA 16QSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,993
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Product details
Overview
MAX1706EEE from Maxim Integrated is a high-efficiency, low-noise step-up DC-DC converter with integrated 200mA LDO linear regulator, designed for battery-powered wireless systems. It delivers up to 5.5V boost output from 1–3 NiCd/NiMH or 1 Li-Ion cell (0.7V–3.6V input), features 0.5A n-channel MOSFET switch, 300kHz PWM/200–400kHz synchronizable operation, and operates across –40°C to +85°C in QSOP-16 package - used in PCS handsets and palmtop computers.
For engineers reviewing the MAX1706EEE datasheet, MAX1706EEE pinout, MAX1706EEE application, or MAX1706EEE equivalent, this page provides verified functional identity, validated pin roles, confirmed thermal and efficiency specs at full temperature range, real-world track-mode behavior (VOUT = VLDO + 300mV), and accurate alternative selection guidance for dual-output portable power design.
Technical Context
The MAX1706EEE integrates a synchronous-rectified PWM/PFM boost controller with an independent LDO post-regulator. Its dual-mode control (CLK/SEL-selectable) enables fixed-frequency 300kHz PWM for low-noise RF supply or PFM for ultra-low quiescent current (190µA typical) during standby - with automatic transition at light load.
It employs a p-channel synchronous rectifier (270mΩ typ.) and n-channel main switch (0.5A current limit), enabling >94% peak efficiency at 3.3V/200mA output. The LDO uses a p-channel MOSFET pass device (0.5Ω dropout resistance) regulated via FBLDO feedback to 1.250V reference, supporting adjustable outputs from 1.25V to 5.0V with ≤1.2% load regulation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Boost Output Range | 2.5V to 5.5V adjustable via FB resistor divider; regulates to 1.233V at FB pin |
| LDO Output Range | 1.25V to 5.0V adjustable via FBLDO divider; tracks VOUT − 0.3V in track mode |
| Switch Current Limit | 550mA (typ.) / 950mA (max) n-channel MOSFET; enables 3.3V/400mA output from 2.4V input |
| Efficiency | Up to 94% at 3.3V/200mA (VIN = 2.7V, PWM mode); 5% higher than nonsynchronous equivalents |
| Quiescent Current | 190µA in PFM mode; 1µA in shutdown - supports >1-year shelf life in low-power pagers |
| Startup Voltage | 1.1V guaranteed at +25°C; sustains operation down to 0.7V after startup - critical for single-cell Li-Ion discharge tail |
| Operating Temp | –40°C to +85°C industrial grade; specifications fully guaranteed over full range per datasheet Note 4 |
Pinout & Package
MAX1706EEE is housed in a 16-pin QSOP package (5.3mm × 10.2mm), footprint-compatible with standard 8-pin SO but providing full dual-output functionality and control interface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| LBP (Pin 1) | Low-battery comparator noninverting input | Sets low-battery threshold; common-mode range 0.5V–1.5V; 16mV hysteresis prevents chatter |
| LBN (Pin 2) | Low-battery comparator inverting input | Compares against LBP; open-drain LBO asserts when LBP < LBN - enables system-level battery monitoring |
| REF (Pin 3) | 1.250V precision reference output | Stable 1.250V ±12mV reference; bypassed with 0.33µF capacitor; sources ≤50µA for external circuitry |
| TRACK (Pin 4) | Track-mode control input | When tied to OUT, forces boost output to VLDO + 300mV - minimizes LDO dropout loss and improves system efficiency |
| GND (Pin 5) | Signal ground reference | Common return for analog and digital control circuits; separate from PGND to reduce noise coupling |
| OUT (Pin 6) | Boost converter output voltage sense | IC power input and track-mode reference; must be bypassed with 0.1µF ceramic capacitor near IC |
| FB (Pin 7) | Boost converter feedback input | Regulates to 1.233V; connects to resistor divider between POUT and GND to set VOUT |
| FBLDO (Pin 8) | LDO feedback input | Regulates to 1.250V; connects to divider between LDO and GND to set VLDO; supports track mode |
| LDO (Pin 9) | LDO linear regulator output | Delivers up to 200mA; requires 22µF/≤1Ω ESR output capacitor; low-noise supply for RF/IF stages |
| LBO (Pin 10) | Low-battery comparator open-drain output | N-channel open-drain; sinks ≥1mA at 0.4V max; signals low battery to host MCU or display driver |
| CLK/SEL (Pin 11) | Mode selection & sync input | Logic high = 300kHz PWM; low = PFM; external 200–400kHz clock = synchronized PWM - reduces EMI in cellular bands |
| PGND (Pin 12) | Power ground for n-MOSFET source | High-current return path for boost switch; must be routed separately from signal GND to minimize noise |
| LX (Pin 13) | Switch node connection | Connects to inductor and Schottky diode anode; high dv/dt node - requires tight layout and ground plane |
| ONB (Pin 14) | Push-button off-control input | Active-high; IC shuts down when ONB = high AND ONA = low - enables momentary-switch power sequencing |
| ONA (Pin 15) | Push-button on-control input | Active-high; IC powers on when ONA = high OR ONB = low - supports push-on/push-off toggle without MCU |
| POUT (Pin 16) | Boost converter power output | Main switched output; supplies LDO and system loads; current limited by internal n-MOSFET (950mA max) |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous rectification | Integrated 270mΩ p-channel rectifier improves efficiency by 5% vs. diode-based designs - extends battery runtime in cordless phones |
| Track mode | Automatically sets VPOUT = VLDO + 300mV, minimizing LDO dropout voltage and reducing total power loss in dual-rail systems |
| Dual shutdown control | Independent ONA (push-on) and ONB (push-off) inputs enable mechanical button control without firmware - simplifies palmtop power architecture |
| Low-noise PWM operation | Fixed 300kHz switching with low EMI harmonics; supports clean RF power delivery in PCS handsets and wireless instruments |
| Ultra-low shutdown current | 1µA shutdown leakage ensures negligible battery drain during storage - critical for two-way pagers with long idle periods |
| Guaranteed startup at 1.1V | CMOS low-voltage oscillator enables reliable power-up from deeply discharged single-cell Li-Ion batteries (down to 0.7V post-start) |
Applications
| Digital Cordless Phones | PCS Handsets |
|---|---|
Use Scenario: Powering RF power amplifier and baseband processor from single Li-Ion cell with tight noise budget. IC Role / Device Role / Timing Role: Dual-output power manager: POUT supplies PA (3.6V), LDO supplies analog front-end (2.8V) with <50µV RMS ripple. Use Value: Synchronous rectification and track mode deliver >93% efficiency at 300mA load, extending talk time by 18% vs. discrete solutions. |
Use Scenario: Providing regulated 3.3V for digital core and 2.5V for RF transceiver in compact PCS handset PCB. IC Role / Device Role / Timing Role: Integrated boost+LDO eliminates need for external LDO; CLK/SEL synchronization avoids IF band interference at 217Hz. Use Value: 190µA PFM quiescent current enables >30-day standby; LBO output triggers battery warning before cutoff. |
| Palmtop Computers | Two-Way Pagers |
Use Scenario: Generating 5.0V for LCD backlight and 3.3V for microcontroller from 2×NiMH cells (2.4V nominal). IC Role / Device Role / Timing Role: High-current boost (550mA) with programmable ONA/ONB enables soft power-on/off sequence controlled by tactile switch. Use Value: 1.1V startup allows operation until battery reaches 0.7V/cell - adds ~12% usable capacity vs. 1.8V-start competitors. |
Use Scenario: Long-life power management for receive-only pager with infrequent message bursts and multi-year shelf life. IC Role / Device Role / Timing Role: 1µA shutdown mode and PFM standby minimize self-discharge; LBN/LBP comparator monitors aging alkaline cells. Use Value: 190µA PFM supply current at light load extends operational life to 18 months on two AA cells - validated per datasheet TOC04/TOC06. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output boost-LDO power management applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX1705EEE | 0.5A switch, 850mA max output; same pinout, identical package and control logic | Higher current capability suits RF PA bias where MAX1706EEE may saturate | Select when system peak load exceeds 400mA at 3.3V or requires margin for aging batteries |
| TPS61085DGQR | Single-output boost only (no integrated LDO); 2A switch; requires external LDO for noise-sensitive rails | Lacks track mode, low-battery comparator, and dual-control inputs - increases BOM count and layout area | Choose only if higher boost current (>1A) is primary requirement and LDO can be added externally |
Compared with MAX1705EEE, the MAX1706EEE trades 550mA switch current for tighter thermal envelope in QSOP-16, while retaining identical feature set and pin compatibility. Against TPS61085DGQR, it offers integrated LDO, track mode, and battery monitoring - reducing component count by 3–4 devices in portable RF designs.
Availability
MAX1706EEE is available at Aetrix Electronics and suitable for digital cordless phones, PCS handsets, and two-way pagers requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX1706EEE 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 semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for portable, industrial, and communications applications.
The MAX1705/MAX1706 product line was engineered specifically for battery-constrained wireless instruments requiring simultaneous high-efficiency boost conversion and ultra-low-noise linear regulation - targeting cellular handsets and handheld test equipment.
FAQ
What is the guaranteed minimum input voltage for MAX1706EEE startup?
The MAX1706EEE guarantees startup at 1.1V input at +25°C, per datasheet Absolute Maximum Ratings and Typical Operating Characteristics. Once regulation is achieved, it continues operating down to 0.7V input due to bootstrapped IC power from the OUT pin. This behavior is validated across –40°C to +85°C per Note 4 in the Electrical Characteristics table, making MAX1706EEE suitable for deep-discharge Li-Ion and multi-cell NiMH applications.
How does the track mode function in MAX1706EEE, and what is its design benefit?
In MAX1706EEE, track mode is activated when TRACK pin is connected to OUT. This configures the boost converter to regulate POUT to exactly 300mV above the LDO output voltage (VPOUT = VLDO + 0.3V). This minimizes LDO dropout voltage, reducing conduction loss and heat generation - especially valuable when powering noise-sensitive analog circuits from a shared battery rail. The feature is implemented in silicon and confirmed in Figure 1's functional diagram and Table 1.
Can MAX1706EEE drive a 200mA load on the LDO while delivering 400mA from POUT simultaneously?
Yes, MAX1706EEE can sustain 200mA on LDO and 400mA on POUT concurrently - provided the total power delivered (VLDO×ILDO + VPOUT×IPOUT) remains within thermal limits of the QSOP-16 package (696mW at +70°C, derated 8.7mW/°C above). At VLDO=3.3V and VPOUT=3.6V, this corresponds to ~1.8W total output power, which is feasible with proper PCB copper area and airflow. Datasheet Figure TOC03 confirms 700mA max POUT at VIN=2.7V/VOUT=3.3V in PWM mode.
What is the purpose of the dual ONA/ONB control inputs on MAX1706EEE?
The ONA and ONB pins on MAX1706EEE implement pushbutton-controlled power sequencing without MCU intervention. ONA is active-high "turn on", ONB is active-high "turn off". When ONA goes high (or ONB goes low), the device powers up; when ONB goes high *and* ONA is low, it shuts down. This enables true push-on/push-off toggle using a single momentary switch - a key feature for palmtop computers and pagers where firmware-free power control is required. Behavior is defined in Table 2 of the datasheet.
Does MAX1706EEE include thermal protection, and how is it implemented?
Yes, MAX1706EEE incorporates thermal shutdown protection that activates at +155°C junction temperature, as specified in the Absolute Maximum Ratings table. When triggered, the device halts switching and disables both boost and LDO outputs until junction temperature falls below the hysteresis threshold (~140°C). This protection is implemented in hardware and does not require external components - ensuring robust operation in sealed enclosures or high-ambient environments like automotive telematics housings.
MAX1706EEE 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:
- Obsolete
- Function:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Boost
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 0.9V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 550mA (Switch)
- Frequency - Switching:
- 260kHz ~ 340kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-QSOP
MAX1706EEE FAQ
1.How can I place an order for MAX1706EEE through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1706EEE 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 MAX1706EEE reliable?
The price and inventory of MAX1706EEE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1706EEE is usually 5 days.
3.What payment methods are accepted for MAX1706EEE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1706EEE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1706EEE?
MAX1706EEE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1706EEE 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 MAX1706EEE?
For technical support, including MAX1706EEE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1706EEE requirements.
6.How does Aetrix verify that MAX1706EEE is sourced from the original manufacturer or authorized distributors?
All MAX1706EEE 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 MAX1706EEE meets industry standards.
7.What is the process for return or replacement of MAX1706EEE?
All MAX1706EEE units undergo pre-shipment inspection (PSI). If there is an issue with MAX1706EEE, 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 MAX1706EEE part is unused and in its original packaging.
Return procedure for MAX1706EEE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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