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.

• 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
• 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

• Vin (Min) (V)
• 3
• Vin (Max) (V)
• 20
• Vout (Min) (V)
• 0.8
• Vout (Max) (V)
• 18
• Iout (Max) (A)
• 1
• Iq (Typ) (uA)
• 1500
• Switching frequency (Min) (kHz)
• 2200
• Switching frequency (Max) (kHz)
• 3600
• Features
• Enable, Light Load Efficiency, Pre-Bias Start-Up
• Rating
• Catalog
• Regulated outputs (#)
• 1
• Control mode
• Current Mode
• Duty cycle (Max) (%)
• 85

LM2734Z的完整型号有：LM2734ZMK/NOPB、LM2734ZMKX/NOPB、LM2734ZSD/NOPB，以下是这些产品的关键参数及官网采购报价：

LM2734ZMK/NOPB，工作温度：-40 to 125，封装：SOT-23-THIN (DDC)-6，包装数量MPQ：1000个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：SN，TI官网LM2734ZMK/NOPB的批量USD价格：1.568（1000+）

LM2734ZMKX/NOPB，工作温度：-40 to 125，封装：SOT-23-THIN (DDC)-6，包装数量MPQ：3000个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：SN，TI官网LM2734ZMKX/NOPB的批量USD价格：1.307（1000+）

LM2734ZSD/NOPB，工作温度：-40 to 125，封装：WSON (NGG)-6，包装数量MPQ：1000个，MSL 等级/回流焊峰值温度：Level-3-260C-168 HR，引脚镀层/焊球材料：SN，TI官网LM2734ZSD/NOPB的批量USD价格：1.307（1000+）

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