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Analog Devices Inc./Maxim Integrated MAX1709ESE+
- Part No.:
- MAX1709ESE+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX1709ESE+.pdf
- Description:
- IC REG BOOST ADJ 7.5A 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:107
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Product details
Overview
MAX1709ESE+ from Maxim Integrated is a 4A, low-noise, high-frequency step-up DC-DC converter IC with integrated 10A n-channel MOSFET, fixed 3.3V/5V or adjustable 2.5V–5.5V output, 600kHz constant-frequency PWM operation, and 0.7V minimum input voltage-designed for local voltage boosting in space-constrained battery-powered routers and RF power amplifier supplies.
For engineers reviewing the MAX1709ESE+ datasheet, MAX1709ESE+ pinout, MAX1709ESE+ application, or MAX1709ESE+ equivalent, key selection criteria include its 6ARMS switch rating in narrow SO package, programmable soft-start via SS/LIM pin, dual push-button on/off control (ONA/ONB), ±0.45%/A load regulation at 4A, and synchronization capability across 350–1000kHz external clock range.
Technical Context
The MAX1709ESE+ implements current-mode PWM control with fixed 600kHz internal oscillator or externally synchronized switching (350–1000kHz), enabling predictable noise spectrum placement for EMI-sensitive RF PA and server board applications. Its Dual-Mode™ architecture supports both fixed-output (3.3V/5V) and resistor-programmable output (2.5V–5.5V) via FB pin feedback.
Control logic uses ONA (active-high enable) and ONB (active-high shutdown) with 0.15V hysteresis, allowing momentary pushbutton operation or conventional logic-level sequencing. The SS/LIM pin independently configures soft-start time (via capacitor) and current limit (via resistor to GND), supporting optimized battery discharge profiles and transient robustness.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | Up to 2.4A continuous (6ARMS switch rating); supports 4A intermittent loads due to matching peak current limit. |
| Input Voltage Range | 0.7V to 5.0V - enables direct single-cell Li-ion or NiMH battery startup without pre-bias. |
| Switching Frequency | 600kHz fixed (typical), synchronizable 350–1000kHz - allows LC filter optimization and IF-band avoidance in comms handsets. |
| Output Voltage Options | Fixed 3.3V or 5V (via 3.3/5 pin), or adjustable 2.5V–5.5V (via FB resistor divider) - supports multi-rail system flexibility. |
| Quiescent Power | <1mW in shutdown - extends battery life in always-on IoT edge nodes and portable test equipment. |
| Load Regulation | ±0.45%/A (measured 1A–5A switch current) - ensures stable 5V rail under dynamic CPU/GPU load steps in workstations. |
| Soft-Start Control | Capacitor-programmable (CSS = 3.2 × tSS µF) - prevents inrush into large output capacitors on hot-swap cards. |
Pinout & Package
Narrow SO-16 package (16-pin, 0.15" wide body) with exposed thermal pad (RoHS-compliant lead-free finish). Designed for PCB copper area heatsinking; typical θJA ≈ 34°C/W with 1in² 1oz Cu.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | ONA | Active-high enable input; combined with ONB enables push-on/push-off control using single momentary switch. |
| 2–4 | LX | Drain of internal n-channel MOSFET; must be shorted together and connected to Schottky diode anode for boost topology. |
| 5, 8 | GND | Analog ground reference; tied to PGND at star point to minimize noise coupling into feedback path. |
| 6 | SS/LIM | Soft-start timing and current limit programming node; capacitor sets ramp rate, resistor to GND scales limit from 7.5A down to 3.5A. |
| 7 | REF | 1.26V precision reference output; bypassed with 0.22µF ceramic to GND for stable feedback loop operation. |
| 9 | OUT | IC power supply input; bypassed with 0.1µF ceramic near pin and series 2Ω resistor to output filter for stability. |
| 10 | FB | Feedback input regulating to 1.24V; grounded for fixed output, or connected to resistor divider for adjustable output. |
| 11–13 | PGND | Power ground return for MOSFET source; must be star-connected with input/output capacitor grounds to suppress ground bounce. |
| 14 | 3.3/5 | Output voltage select logic input; low = 3.3V, high = 5V when FB is grounded - eliminates external resistors for standard rails. |
| 15 | CLK | External clock input; driven high or connected to OUT for internal 600kHz operation; accepts 350–1000kHz sync signal. |
| 16 | ONB | Active-high shutdown input; complements ONA to implement latched on/off control or inverted single-line interface. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 10A n-channel MOSFET | Eliminates external high-current switch; reduces BOM count and layout area in compact router line cards. |
| 0.7V minimum input voltage | Enables direct start-up from depleted single-cell batteries, extending runtime in handheld medical monitors. |
| Low-noise 600kHz fixed-frequency PWM | Confines EMI to discrete harmonics, simplifying post-filtering for 3.6V RF PAs in LTE handsets. |
| Programmable soft-start & current limit | Prevents inrush damage to electrolytic output caps and allows safe current limiting during battery cold-cranking. |
| Dual-mode output configuration | Supports drop-in replacement of legacy 3.3V or 5V boosters while enabling future-proof adjustable designs. |
Applications
| Router Local Power Conversion | RF Power Amplifier Supply |
|---|---|
|
Use Scenario: Boosting 3.3V system rail to 5V for Ethernet PHY and USB controller ICs on compact network edge routers. IC Role / Device Role / Timing Role: Primary step-up regulator delivering up to 2.4A continuous output with <1mW quiescent draw in standby. Use Value: Enables single-supply design with no external MOSFET or gate driver, reducing layer count and assembly cost. |
Use Scenario: Generating stable 5V supply for 3.6V-class RF power amplifiers in 4G/5G mobile handsets. IC Role / Device Role / Timing Role: Low-noise, synchronizable boost converter operating at 600kHz to avoid IF band interference. Use Value: Predictable harmonic spectrum allows simple LC filtering; 0.7V start-up supports battery brownout recovery. |
| Workstation Card Rack Supply | Battery-Powered Test Equipment |
|
Use Scenario: Local 2.5V-to-3.3V conversion for FPGA I/O banks and memory interfaces on high-density server mezzanine cards. IC Role / Device Role / Timing Role: Adjustable-output DC-DC converter (2.5V–5.5V) with ±0.45%/A load regulation over full 2.4A range. Use Value: Eliminates need for multiple fixed-output regulators; programmable current limit protects against shorted daughterboards. |
Use Scenario: Portable oscilloscope or multimeter requiring ultra-low quiescent power and reliable cold-start from 1.2V alkaline cells. IC Role / Device Role / Timing Role: High-efficiency boost IC with <1mW shutdown current and 0.7V minimum VIN for extended shelf life. Use Value: Doubles battery service life vs. older boost converters; soft-start prevents meter display flicker during power-on. |
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 |
|---|---|---|---|
| MAX1708ESE+ | Lower 2A output rating, same narrow SO-16 package, identical pinout and control logic. | Targeted for ≤2A loads only; lacks 4A intermittent capability and higher RMS switch rating of MAX1709ESE+. | Select MAX1708ESE+ only when full 2.4A continuous output is unnecessary and cost reduction is prioritized. |
| TPS61088RHLR | 4A rated, 2.7–12V input, 4.5–20V output, 600kHz/1.2MHz selectable frequency, no exposed pad in 20-pin VQFN. | Broader input range but requires external MOSFET; lacks ONA/ONB pushbutton logic and Dual-Mode™ fixed/adjustable output. | Choose TPS61088RHLR for higher input voltages (>5V) or when external FET control is required; not pin-compatible. |
Compared with MAX1708ESE+, the MAX1709ESE+ delivers 20% higher continuous output and supports 4A pulsed loads; versus TPS61088RHLR, it integrates the power switch and offers simpler pushbutton control but has narrower input range and fixed-frequency-only operation.
Availability
MAX1709ESE+ is available at Aetrix Electronics and suitable for router power management, RF PA biasing, workstation card rack supplies, and battery-powered test equipment requiring stable component supply across industrial temperature range (-40°C to +85°C).
Supply support for MAX1709ESE+ 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 industrial, communications, and consumer applications.
The MAX1709 product line delivers high-power, low-noise step-up conversion for space-constrained, battery-sensitive systems-designed specifically to replace discrete boost solutions in networking, handheld, and embedded computing platforms.
FAQ
What is the maximum continuous output current of the MAX1709ESE+?
The MAX1709ESE+ delivers up to 2.4A continuous output current, limited by its 6ARMS-rated internal n-channel MOSFET in the narrow SO-16 package. It supports 4A intermittent loads due to matching peak current limit (7.5–12A), but sustained 4A operation exceeds thermal limits without aggressive PCB heatsinking.
Can the MAX1709ESE+ operate from a single 1.2V alkaline cell?
Yes, the MAX1709ESE+ starts up from as low as 0.9V (typical) and operates continuously down to 0.7V input voltage once running-making it suitable for direct connection to single-cell alkaline, NiMH, or Li-ion batteries in portable test gear and medical monitors where deep discharge tolerance is critical.
How does the MAX1709ESE+ achieve low-noise performance?
The MAX1709ESE+ uses fixed 600kHz constant-frequency PWM operation, confining switching noise to discrete harmonics that are easily filtered with small LC components. Its synchronizable clock input (350–1000kHz) further enables precise EMI band placement-critical for RF PA biasing in 4G/5G handsets where IF interference must be avoided.
What is the function of the SS/LIM pin on the MAX1709ESE+?
The SS/LIM pin on the MAX1709ESE+ serves dual functions: connecting a capacitor to GND sets soft-start time (CSS = 3.2 × tSS µF), while connecting a resistor to GND scales the current limit from 7.5A down to 3.5A. During shutdown, the pin is internally pulled to GND to discharge the soft-start capacitor automatically.
Is the MAX1709ESE+ pin-compatible with the MAX1709EUI+?
No, the MAX1709ESE+ (narrow SO-16) and MAX1709EUI+ (28-pin TSSOP-EP) have different pin counts, layouts, and thermal pad configurations. While both share identical functional pin definitions (e.g., ONA, LX, FB), they are not mechanically or electrically interchangeable without PCB redesign and layout revision.
MAX1709ESE+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Function:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Boost
- Output Type:
- Adjustable (Programmable)
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 0.7V
- Voltage - Input (Max):
- 5V
- Voltage - Output (Min/Fixed):
- 2.5V (3.3V, 5V)
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 7.5A (Switch)
- Frequency - Switching:
- 350kHz ~ 1MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
MAX1709ESE+ FAQ
1.How can I place an order for MAX1709ESE+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1709ESE+ 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 MAX1709ESE+ reliable?
The price and inventory of MAX1709ESE+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1709ESE+ is usually 5 days.
3.What payment methods are accepted for MAX1709ESE+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1709ESE+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1709ESE+?
MAX1709ESE+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1709ESE+ 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 MAX1709ESE+?
For technical support, including MAX1709ESE+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1709ESE+ requirements.
6.How does Aetrix verify that MAX1709ESE+ is sourced from the original manufacturer or authorized distributors?
All MAX1709ESE+ 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 MAX1709ESE+ meets industry standards.
7.What is the process for return or replacement of MAX1709ESE+?
All MAX1709ESE+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX1709ESE+, 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 MAX1709ESE+ part is unused and in its original packaging.
Return procedure for MAX1709ESE+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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