LM2623QNHLTQ1.A中文资料德州仪器数据手册PDF规格书

1 Features

1• AEC-Q100 Qualified for Automotive Applications:

– Device Temperature Grade 1: –40°C to 125°C

Ambient Operating Temperature

– Device HBM ESD Classification Level 2

– Device CDM ESD Classification Level C4A

• Good Efficiency Over a Very Wide Load Range

• Very Low Output Voltage Ripple

• Up to 2-MHz Switching Frequency

• 0.9-V to 14-V Operating Voltage

• 1.1-V Start-Up Voltage

• 1.24-V to 14-V Adjustable Output Voltage

• 0.17-Ω Internal MOSFET

• Up to 90% Regulator Efficiency

• 80-μA Typical Operating Current (Into VDD Pin of

Supply)

• Low Shutdown Current (IQ < 2.5 μA)

• 4-mm × 4-mm Thermally Enhanced WSON

Package Option

2 Applications

• Automotive Camera

• Automotive Radar

• Automotive GPS

• Flash Memory Programming

• White-LED Drive

3 Description

The LM2623-Q1 is a high-efficiency, generalpurpose,

step-up DC-DC switching regulator for

automotive systems. The device accepts an input

voltage between 0.9 V and 14 V and converts it into a

regulated output voltage between 1.24 V and 14 V.

In order to adapt to a number of applications, the

LM2623-Q1 allows the designer to program the

output voltage, the operating frequency (300 kHz to

2 MHz), and duty cycle (17% to 90%) to optimize

performance. The selected values can be fixed or can

vary with input voltage or input-to-output voltage ratio.

The LM2623-Q1 uses a very simple, on/off regulation

mode to produce good efficiency and stable operation

over a wide operating range. The device normally

regulates by skipping switching cycles when it

reaches the regulation limit (pulse frequency

modulation (PFM)).

Refer to Non-Linear Effect and Choosing the Correct

C3 Capacitor to resolve any design challenges before

board design is finalized.