The LM26003 is a switching regulator designed for the high-efficiency requirements of applications with standby modes. The device features a low-current sleep mode to maintain efficiency under light-load conditions and current-mode control for accurate regulation over a wide input voltage range. Quiescent current is reduced to 10.8 µA typically in shutdown mode and less than 40 µA in sleep mode. Forced PWM mode is also available to disable sleep mode.

The LM26003 device can deliver up to 3 A of continuous load current with a fixed current limit, through the internal N-channel switch. The part has a wide input voltage range of 4.0 V to 38 V and can operate with input voltages as low as 3 V during line transients.

Operating frequency is adjustable from 150 kHz to 500 kHz with a single resistor and can be synchronized to an external clock.

Other features include Power Good, adjustable soft-start, enable pin, input undervoltage protection, and an internal bootstrap diode for reduced component count.

• LM26003-Q1 is an Automotive-Grade Product That is AEC-Q100 Grade 1 Qualified (–40°C to +125°C Operating Junction Temperature)
• High-Efficiency Sleep Mode
• 40-μA Typical Iq in Sleep Mode
• 10.8-μA Typical Iq in Shutdown Mode
• 3.0-V Minimum Input Voltage
• 4.0-V to 38-V Continuous Input Range
• 1.5% Reference Accuracy
• Cycle-by-Cycle Current Limit
• Adjustable Frequency (150 kHz to 500 kHz)
• Synchronizable to an External Clock
• Power Good Flag
• Forced PWM Function
• Adjustable Soft-Start
• 20-Pin HTSSOP Package
• Thermal Shut Down

• Vin (Min) (V)
• 3
• Vin (Max) (V)
• 38
• Vout (Min) (V)
• 1.25
• Vout (Max) (V)
• 35
• Iout (Max) (A)
• 3
• Iq (Typ) (uA)
• 40
• Switching frequency (Min) (kHz)
• 150
• Switching frequency (Max) (kHz)
• 500
• Features
• Enable, Forced PWM, Frequency Synchronization, Light Load Efficiency, Power Good, Pre-Bias Start-Up, Soft Start Adjustable
• Rating
• Automotive
• Regulated outputs (#)
• 1
• Control mode
• Current Mode
• Duty cycle (Max) (%)
• 98

LM26003-Q1的完整型号有：LM26003QMH/NOPB、LM26003QMHX/NOPB，以下是这些产品的关键参数及官网采购报价：

LM26003QMH/NOPB，工作温度：-40 to 125，封装：HTSSOP (PWP)-20，包装数量MPQ：73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LM26003QMH/NOPB的批量USD价格：2.064（1000+）

LM26003QMHX/NOPB，工作温度：-40 to 125，封装：HTSSOP (PWP)-20，包装数量MPQ：2500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LM26003QMHX/NOPB的批量USD价格：1.783（1000+）

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