ELM600xB
1A 1.5MHz high efficiency synchronous PWM step down DC/DC converter
ELM600xB is a high efficiency step down DC/DC converter operated with current mode and constant frequency. The internal switch and synchronous rectifier are integrated for high efficiency. External Schottky diodes are not required. The supply current is only 100μA during operation and drops to less than 1μA in shutdown. ELM600xB can supply 1A of load current from 2.5V to 5.5V supply voltage. The switching frequency is set at 1.5MHz, allowing the use of small surface mount inductors and capacitors. It can run 100% duty cycle for low dropout application. The output voltage of ELM600xB is adjustable from the FB pin.
| Current mode operation | |
|---|---|
| Thermal shutdown protection and short circuit protection | |
| Constant frequency | Typ.1.5MHz |
| Output current | 1A |
| High efficiency | Max.95% |
| Shutdown current | Max.1µA (Ven=0V, Vin=5.5V) |
| Supply voltage | 2.5V to 5.5V |
| Low quiescent current | Typ.110µA (Outgoing stopped) |
| Full duty ratio | 0 to 100% (in dropout) |
| Package | DFN6-2x2 TSOT-25 |
| Datasheet | ELM600xB |
- Application
- Cellular phone
- PDA and smart phone
- MP3 player
- Digital camera
- Wireless and DSL card
- Microcomputer and DSP power supply
- Portable machine
Absolute Maximum Ratings
| Parameter | Symbol | Limit | Unit |
|---|---|---|---|
| VIN power supply voltage | Vin | -0.3 to +6.0 | V |
| Apply voltage to SW | Vsw | GND-0.3 to Vin+0.3 | V |
| Apply voltage to EN | Ven | GND-0.3 to Vin+0.3 | V |
| Apply voltage to FB | Vfb | GND-0.3 to Vin+0.3 | V |
| SW peak current | Isw | 3.0 | A |
| Power dissipation | Pd | 1000(DFN6-2x2) 600(TSOT-25) | mW |
| Operating temperature range | Top | -40 to +85 | °C |
| Storage temperature range | Tstg | -65 to +150 | °C |
Block diagram
