ELM603GC
5V input 1.5A 1.5MHz synchronous step-down DC/DC converter
ELM603GC is high efficiency 1.5A constant on-time (COT) controlled synchronous step-down DC/DC converter.
It can operate with input voltage from 2.5V to 6.0V and provide output range from 0.6V to input level, thanks to its 100% duty cycle operation.
The constant on-time control scheme simplifies loop compensation and offers excellent load transient response. ELM603GC operates at fixed 1.5MHz across entire load range.
The high gain error amplifier in the control loop provides excellent load and line regulation. ELM603GC has cycle-by-cycle current limit and hiccup mode to protect over-load or short circuit fault conditions.
ELM603GC is available in low profile 6 leads DFN 2mm×2mm packages.
| Proprietary fast transient constant on time architecture
stable with low ESR ceramic output capacitors | |
|---|---|
| Thermal shutdown protection | |
| Internal 1msec soft-start | |
| Cycle-by-cycle current limit protection | |
| Input under/over voltage lockout | |
| Output discharging function in shutdown | |
| Hiccup mode for short circuit and over-load protection | |
| Output current | 1.5A |
| Wide input voltage range | 2.5V to 6.0V |
| Switching frequency | Fixed 1.5MHz |
| Feedback voltage | 0.6V ±2% |
| Built-in power switches | 260mΩ/180mΩ |
| Maximum duty cycle | 100% |
| Package | DFN6-2x2 |
| Datasheet | ELM603GC |
- Application
- Solid-state and hard disk drives
- WiFi RF modules
- DC/DC micro modules
- Smart phone and tablets
Absolute Maximum Ratings
| Parameter | Symbol | Limit | Unit |
|---|---|---|---|
| Input voltage | Vin | -0.3 to +6.5 | V |
| Output voltage | Vout | +0.6 to Vin | V |
| SW pin voltage | Vsw | -0.3 to Vin+0.3 | V |
| Dynamic Vsw(In 10ns duration) | Vsw | -2.0 to Vin+2.0 | V |
| The other pins | Vother | -0.3 to +6.5 | V |
| Power dissipation | Pd | 1300 | mW |
| Operating temperature range | Top | -40 to +85 | °C |
| Storage temperature range | Tstg | -65 to +150 | °C |
| Junction temperature range | Tj | -40 to +150 | °C |
| Thermal resistance | θja | 75 | °C/W |
| Thermal resistance | θjc | 20 | °C/W |
Block diagram
