The LM3501 is a fixed-frequency step-up DC/DC converter that is ideal for driving white LEDs for display backlighting and other lighting functions. With fully integrated synchronous switching (no external schottky diode required) and a low feedback voltage (515 mV), power efficiency of the LM3501 circuit has been optimized for lighting applications in wireless phones and other portable products (single cell Li-Ion or 3-cell NiMH battery supplies). The LM3501 operates with a fixed 1 MHz switching frequency. When used with ceramic input and output capacitors, the LM3501 provides a small, low-noise, low-cost solution.

Two LM3501 options are available with different output voltage capabilities. The LM3501-21 has a maximum output voltage of 21V and is typically suited for driving 4 or 5 white LEDs in series. The LM3501-16 has a maximum output voltage of 16V and is typically suited for driving 3 or 4 white LEDs in series (maximum number of series LEDs dependent on LED forward voltage). If the primary white LED network should be disconnected, the LM3501 uses internal protection circuitry on the output to prevent a destructive overvoltage event.

A single external resistor is used to set the maximum LED current in LED-drive applications. The LED current can easily be adjusted by varying the analog control voltage on the control pin or by using a pulse width modulated (PWM) signal on the shutdown pin. In shutdown, the LM3501 completely disconnects the input from output, creating total isolation and preventing any leakage currents from trickling into the LEDs.

• Synchronous Rectification, High Efficiency and no External Schottky Diode required
• Uses Small Surface Mount Components
• Can Drive 2-5 White LEDs in Series (May Function with More Low VF LEDs)
• 2.7V to 7V Input Range
• True Shutdown Isolation, no LED Leakage Current
• DC Voltage LED Current Control
• Input Undervoltage Lockout
• Internal Output Over-Voltage Protection (OVP) Circuitry, with no External Zener Diode Required LM3501-16: 15.5V OVP; LM3501-21: 20.5V OVP.
• Requires Only a Small 16V (LM3501-16) or 25V (LM3501-21) Ceramic Capacitor at the Input and Output
• Thermal Shutdown
• 0.1μA shutdown Current
• Small 8-Bump Thin DSBGA Package

All trademarks are the property of their respective owners.

• Number of channels (#)
• 1
• Vin (Min) (V)
• 2.7
• Vin (Max) (V)
• 7
• Vout (Min) (V)
• 6
• Vout (Max) (V)
• 20
• Type
• Inductive
• Switching frequency (Max) (kHz)
• 1000
• LED current per channel (mA)
• 100
• Peak efficiency (%)
• 85
• Topology
• Boost
• Features
• OVP
• Operating temperature range (C)
• -40 to 85

LM3501的完整型号有：LM3501TL-16/NOPB，以下是这些产品的关键参数及官网采购报价：

LM3501TL-16/NOPB，工作温度：-40 to 85，封装：DSBGA (YZR)-8，包装数量MPQ：250个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：SNAGCU，TI官网LM3501TL-16/NOPB的批量USD价格：1.063（1000+）

LM3501TL-16EV — 用于白光 LED 应用的同步升压 DC DC 转换器

A high efficiency synchronous step-up DC/DC converter with analog brightness control designed for white LED applications.

PSPICE-FOR-TI — 适用于 TI 设计和模拟工具的 PSpice

PSpice for TI 可提供帮助评估模拟电路功能的设计和仿真环境。此功能齐全的设计和仿真套件使用 Cadence 的模拟分析引擎。PSpice for TI 可免费使用，包括业内超大的模型库之一，涵盖我们的模拟和电源产品系列以及精选的模拟行为模型。

借助?PSpice for TI 的设计和仿真环境及其内置的模型库，您可对复杂的混合信号设计进行仿真。创建完整的终端设备设计和原型解决方案，然后再进行布局和制造，可缩短产品上市时间并降低开发成本。

在?PSpice for TI 设计和仿真工具中，您可以搜索 TI (...)