ELM623FA
20A Fully Integrated Synchronous Boost Converter
ELM623FA is a high efficiency fully integrated synchronous Boost converter with built-in main switch and synchronous switch. The device has 20A switch peak current capability and provides output voltage up to 18V. Synchronous rectification increases efficiency, reduces power losses and eases thermal requirements, allowing ELM623FA to be used in high power step-up applications. The 2.7V to 18V input voltage range supports a wide range of battery and AC powered inputs. The 70µA no load quiescent current extends operating run time in battery-powered systems. The operating frequency can be externally set for a 50kHz to 1MHz range, as for operation mode is automatic PSM/PWM mode. ELM623FA implements a programmable soft-start function, an adjustable cycle by cycle switching peak current limit function and thermal shutdown protection. ELM623FA is available in a small 20 pin 4mm×4mm QFN package.
| Adjustable Input UVLO through EN pin | |
|---|---|
| Resistor or Inductor DCR current sensing | |
| Programmable Soft-start | |
| Cycle-by-Cycle Current Limit | |
| Thermal Shutdown | |
| Integrated 18V rating 9mΩ power switches with 20A peak current capability | |
| Input Range | 2.7V to 18.0V |
| Output Voltage | 3.0V to 18.0V |
| Low Quiescent Current | 70µA |
| Low shutdown supply current | 3.5µA |
| Adjustable Frequency | 50kHz to 1MHz |
| Package | QFN20-4x4 |
| Datasheet | ELM623FA |
- Application
- USB Type C-PD and Thunderbolt Port for PCs
- Industrial Battery Powered POS Terminals
- Quick Charge Power Banks
- Electronic Cigarette
- Hi Power Bluetooth Speaker
Recommend operating conditions
| Parameter | Symbol | Limit | Unit |
|---|---|---|---|
| Input Voltage | Vin | +2.7 to +18.0 | V |
| Output Voltage | Vout | +3.0 to 18.0 | V |
| Operating temperature | Top | -40 to +85 | °C |
Absolute Maximum Ratings
| Parameter | Symbol | Limit | Unit |
|---|---|---|---|
| VH to GND | Vvh | -0.3 to +20.0 | V |
| ISP to GND | Visp | -0.3 to +20.0 | V |
| ISN to GND | Visn | -0.3 to +20.0 | V |
| OUT to GND | Vout | -0.3 to +20.0 | V |
| ISP to ISN | Visp_isn | -0.3 to +0.3 | V |
| PGND to GND | Vpgnd | -0.3 to +0.3 | V |
| SW to GND | Vsw | -1 to Vout+1 | V |
| Dynamic Vsw in 50ns duration | -3 to Vout+3 | V | |
| BST to SW | Vbst_sw | -0.3 to +6.0 | V |
| EN to GND | Ven | -0.3 to +6.0 | V |
| FB to GND | Vfb | -0.3 to +6.0 | V |
| COMP to GND | Vcomp | -0.3 to +6.0 | V |
| VCC to GND | Vcc | -0.3 to +6.0 | V |
| Power dissipation | Pd | 2.0 | W |
| Storage temperature range | Tstg | -55 to +150 | °C |
Block diagram
