| Vin (Min) (V) | 3 |
| Vin (Max) (V) | 20 |
| Vout (Min) (V) | 0.8 |
| Vout (Max) (V) | 18 |
| Iout (Max) (A) | 1 |
| Iq (Typ) (uA) | 1700 |
| Switching frequency (Min) (kHz) | 2200 |
| Switching frequency (Max) (kHz) | 3600 |
| Features | Enable, Light Load Efficiency, Pre-Bias Start-Up |
| Rating | Automotive |
| Regulated outputs (#) | 1 |
| Control mode | Current Mode |
| Duty cycle (Max) (%) | 85 |
- Qualified for Automotive Applications
- AEC-Q100 Qualified With the Following Results:
- Device Temperature Grade 1: –40°C to 125°C
Ambient Operating Temperature Range - Device HBM ESD Classification Level 2
- Device CDM ESD Classification Level C6
- Device Temperature Grade 1: –40°C to 125°C
- 6-pin SOT Package, or 6-Pin WSON Package
- 3.0-V to 20-V Input Voltage Range
- 0.8-V to 18-V Output Voltage Range
- 1-A Output Current
- 3-MHz Switching Frequency
- 300-mΩ NMOS Switch
- 30-nA Shutdown Current
- 0.8-V, 2% Internal Voltage Reference
- Internal Soft-Start
- Current-Mode, PWM Operation
- Thermal Shutdown
The LM2734Z regulator is a monolithic, high-frequency, PWM step-down DC?DC converter assembled in a thick 6-pin SOT and a WSON non-pullback package. The device provides all the active functions to provide local DC?DC conversion with fast transient response and accurate regulation in the smallest possible PCB area.
With a minimum of external components and online design support through WEBENCH?, the LM2734Z is easy to use. The ability to drive 1-A loads with an internal 300-mΩ NMOS switch using state-of-the-art 0.5-μm BiCMOS technology results in the best power density available. The world class control circuitry allows for ON-times as low as 13 ns, thus supporting exceptionally high-frequency conversion over the entire 3-V to 20-V input operating range down to the minimum output voltage of 0.8 V. Switching frequency is internally set to 3 MHz, allowing the use of extremely small surface mount inductors and chip capacitors. Even though the operating frequency is very high, efficiencies up to 85% are easy to achieve. External shutdown is included, featuring an ultra-low standby current of 30 nA. The LM2734Z uses current-mode control and internal compensation to provide high-performance regulation over a wide range of operating conditions. Additional features include internal soft-start circuitry to reduce inrush current, pulse-by-pulse current limit, thermal shutdown, and output overvoltage protection.
