MAX17687
4.5V to 60V Input, Ultra-Small, High-Efficiency, Iso-Buck DC-DC Converter
Reduce External Components, Solution Size and Cost for DC-DC Isolation
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Key Features
Applications/Uses
| VIN (V) (min) | 4.5 |
| VIN (V) (max) | 60 |
| Switch Type | Internal |
| VOUT1 Tolerance (±%) | 1 |
| Output Adjust. Method | Resistor |
| Synchronous Switching? | Yes |
| Power Good Signal | Yes |
| ICC (mA) (max) | 1.16 |
| # DC-DC Outputs | 1 |
| Alternate Topology | Step-Down Step-Up |
| Switching Frequency (kHz) | 500 |
| Design Tools | EE-Sim |
| Package/Pins | TQFN/20 |
| Oper. Temp. (°C) | -40 to +125 |
| Budgetary Price (See Notes) | 2.65 |
| VIN (V) (min) | 4.5 |
| VIN (V) (max) | 60 |
| Topology | Flyback |
| Application (VIN) | Base Station (24V) Industrial (24V) |
| Switch Type | Internal |
| Control Loop | Current Mode |
| Feedback | Primary Side |
| Switching Frequency (kHz) | 100-500 |
| Duty Cycle (%) (max) | 97.5 |
| Oper. Temp. (°C) | -40 to +125 |
| Package/Pins | TQFN/20 |
Simplified Block Diagram
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Parameters
| VIN (V) (min) | 4.5 |
| VIN (V) (max) | 60 |
| Switch Type | Internal |
| VOUT1 Tolerance (±%) | 1 |
| Output Adjust. Method | Resistor |
| Synchronous Switching? | Yes |
| Power Good Signal | Yes |
| ICC (mA) (max) | 1.16 |
| # DC-DC Outputs | 1 |
| Alternate Topology | Step-Down Step-Up |
| Switching Frequency (kHz) | 500 |
| Design Tools | generateDesignEESIMUrl('http://maxim.transim.com/pwm2/designreq/Index?partId=10638', '') |
| Package/Pins | TQFN/20 |
| Oper. Temp. (°C) | -40 to +125 |
| Budgetary Price (See Notes) | 2.65 |
| VIN (V) (min) | 4.5 |
| VIN (V) (max) | 60 |
| Topology | Flyback |
| Application (VIN) | Base Station (24V) Industrial (24V) |
| Switch Type | Internal |
| Control Loop | Current Mode |
| Feedback | Primary Side |
| Switching Frequency (kHz) | 100-500 |
| Duty Cycle (%) (max) | 97.5 |
| Oper. Temp. (°C) | -40 to +125 |
| Package/Pins | TQFN/20 |
Key Features
- Eliminates External Components and Reduces Total Cost
- Synchronous Primary Operation for High Efficiency and Reduced Cost
- All-Ceramic Capacitors, Ultra-Compact Layout
- Supports Numerous Isolated DC-DC Applications
- Wide 4.5V to 60V Input Voltage Range
- Delivers up to 3.2A Peak Current
- 100kHz to 500kHz Adjustable Frequency with External Synchronization
- Available in a 20-Pin, 4mm x 4mm TQFN Package
- Reduces Power Dissipation
- Peak Efficiency > 90%
- Shutdown Current = 2.8μA (typ)
- Operates Reliably in Adverse Industrial Environments
- Hiccup-Mode Current Limit, Sink Current Limit, and Auto-Retry Startup
- Programmable EN/UVLO Threshold
- Adjustable Soft-Start
- -40°C to +125°C Ambient Operating Temperature Range
- -40°C to +150°C Junction Temperature Range
Applications/Uses
- Communication Hub in Smart Meters
- Floating Power Supply Generation
- Industrial Process Control
- Isolated Power Supplies in Medical Equipment
Description
The Rainier series of isolated DC-DC products enable small, efficient solutions with a lower BOM. The MAX17687 is a high-voltage, high-efficiency, iso-buck DC-DC converter designed to provide isolated power up to 10W. The device operates over a wide 4.5V to 60V input voltage range and uses primary-side feedback to regulate the output voltage. It delivers primary peak current up to 3.2A and regulates primary output voltage to within ±1.2%.
The device features peak-current-mode control with pulse-width modulation (PWM) scheme. The low-resistance, on-chip MOSFETs ensure high efficiency at full load and simplify the layout.
A programmable soft-start feature allows users to reduce input inrush current. The device also incorporates an output enable/undervoltage lockout pin (EN/UVLO) that allows the user to turn on the part at the desired input-voltage level. An open-drain active-low RESET pin provides a delayed power-good signal to the system upon achieving successful regulation of the primary output voltage.
The device operates from -40°C to +125°C and is available in a compact 20-pin (4mm x 4mm) TQFN package. Simulation models are available.
Support & Training
Search our knowledge base for answers to your technical questions.
Filtered SearchOur dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .
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