The LM3553 is a fixed frequency, current mode step-up DC/DC converter with two regulated current sinks. The device is capable of driving loads up to 1.2A from a single-cell Li-Ion battery.

The LM3553 includes a TX pin that forces Torch mode during a flash event allowing for synchronization between the RF power amplifier and Flash/Torch modes. It also includes a multi-function pin (M/F) that can serve as a GPIO and a hardware RESET pin.

The LM3553 is available in a 3mm by 3mm package.

• Accurate and Programmable LED Current up to 1.2A in 128 Steps
• Total Solution Size < 30mm2
• 90% Peak Efficiency
• Drives 2 LEDs in Series with 1.2A from 5V Input
• Drives 2 LEDs in Series with 600mA from 3.0V Input
• Drives 1 LED with 1.2A from 3.0V Input
• Adjustable Over-Voltage Protection Allows for Single or Series LED Operation
• Four Operating Modes: Torch, Flash, Indicator, and Voltage Mode (4.98V)
• Programmable Flash Pulse Safety Timer in 16 Steps
• TX Input Ensures Synchronization with RF Power Amplifier Pulse or Prevents LED from Overheating
• LED Disconnect During Shutdown
• Flash/Imager Synchronization via FEN Pin
• Active Low Hardware Reset
• Multi-Function Pin (RESET and GPIO)
• Low Profile 12-pin WSON Package (DQB0012A: 3mm x 3mm x 0.8mm, 0.4mm pitch)

• TPS3600D25 - 用于低功耗处理器的电池备份监控器
• ADS5409 - 双通道 12 位 900Msps 模数转换器
• TPS2816 - 具有源上拉和内部稳压器的反向高速 MOSFET 驱动器
• LM3550 - 具有自动 Vf 和 ESR 检测的闪存 LED 驱动器，用于移动摄像机系统
• BQ3050 - 符合 SBS 1.1 的 2S 至 4S 电池电量监测计和保护
• TPS54388-Q1 - 汽车类 2.95V 至 6V 输入、3A、2MHz 同步降压 SWIFT DCDC 转换器
• SN74AUC2G08 - 双路 2 输入正与门
• SN54ACT16373 - 具有三态输出的 16 位 D 类透明锁存器
• TPS62612 - 350mA、6MHz、1.5V 输出高效降压转换器
• MSP430FR5869 - Wolverine 混合信号微控制器