| Vin (Min) (V) | 3 |
| Vin (Max) (V) | 20 |
| Vout (Min) (V) | 0.6 |
| Vout (Max) (V) | 16 |
| Iout (Max) (A) | 2 |
| Iq (Typ) (uA) | 4000 |
| Switching frequency (Min) (kHz) | 500 |
| Switching frequency (Max) (kHz) | 500 |
| Features | Enable, Light Load Efficiency, Power Good, Pre-Bias Start-Up |
| Rating | Catalog |
| Regulated outputs (#) | 2 |
| Control mode | Current Mode |
| Duty cycle (Max) (%) | 96 |
- Input Voltage Range of 3 V to 20 V
- Dual 2-A Output
- Output Voltage Down to 0.6 V
- Internal Compensation
- 500-kHz PWM Frequency
- Separate Enable Pins
- Separate Soft-Start Pins
- Frequency Foldback Protection
- 175-mΩ NMOS Switch
- Integrated Bootstrap Diodes
- Overcurrent Protection
- HTSSOP and WSON Packages
- Thermal Shutdown
The LM26400Y device is a monolithic, two-output fixed-frequency PWM step-down DC-DC regulator, in a 16-pin WSON or thermally-enhanced HTSSOP package. With a minimum number of external components and internal loop compensation, the LM26400Y is easy to use.
The ability to drive 2-A loads with an internal 175-mΩ NMOS switch using state-of-the-art 0.5-μm BiCMOS technology results in a high-power density design. The world class control circuitry allows for an ON-time as low as 40 ns, thus supporting high-frequency conversion over the entire input range of 3 V to 20 V and down to an output voltage of only 0.6 V. The LM26400Y utilizes peak current-mode control and internal compensation to provide high-performance regulation over a wide range of line and load conditions. Switching frequency is internally set to 500 kHz, optimal for a broad range of applications in terms of size versus thermal tradeoffs.
Given a nonsynchronous architecture, efficiencies above 90% are easy to achieve. External shutdown is included, enabling separate turnon and turnoff of the two channels. Additional features include programmable soft-start circuitry to reduce inrush current, pulse-by-pulse current limit and frequency foldback, integrated bootstrap structure, and thermal shutdown.
