電流 - 輸出/通道 150mA
狀態 Prod
Vdd(V) 5.0-42
腳位數 SOT23-6
文件 Eval Board
驅動類型 Constant Current
效率(%) Non-PWM
功率晶體管 Built-in
IC代碼 3170 = 3170
產品系列 31 = Commercial/Industrial Analog
產品類別 LT = Lighting LED Driver
腳位/封裝 ST = SOT23
焊料類型 L = Lead-free (RoHS Compliant)
Temperature Grade S4 = Industrial temp. (-40°C to 125°C)
包裝選項 TR = Tape & Reel
外包裝 Tape on Reel

IS31LT3170-STLS4-TR 特徵

  • Low-side current sink
  • - Current preset to 10mA - Adjustable from 10mA to 150mA with external resistor selection
  • Wide input voltage range from
  • - 2.5V to 42V (IS31LT3171) - 5V to 42V (IS31LT3170) with a low dropout of typical 1V
  • Up to 10kHz PWM input (IS31LT3171 only)
  • Protection features:
  • - 0.26%/K negative temperature coefficient at high temp for thermal protection
  • Up to 1W power dissipation in a small SOT23-6 package
  • RoHS compliant (Pb-free) package
  • Architectural LED lighting
  • Channel letters for advertising, LED strips for decorative lighting
  • Retail lighting in fridge, freezer case and vending machines


The IS31LT3170 and IS31LT3171 are adjustable linear current devices with excellent temperature stability. A single resistor is all that is required to set the operating current from 10mA to 150mA. The devices can operate from an input voltage from 2.5V to 42V with a minimal voltage headroom of 1V (typical). Designed with a low dropout voltage; the device can drive LED strings close to the supply voltage without switch capacitors or inductors. The IS31LT3170/71 simplifies designs by providing a stable current without the additional requirement of input or output capacitors, inductors, FETs or diodes. The complete constant current driver requires only a current set resistor and a small PCB area making designs both efficient and cost effective. The EN pin (1) of the IS31LT3170 can be tied to Vbat or BCM PWM signal for high side dimming. The EN Pin (1) of the IS31LT3171 can function as the PWM signal input used for low side dimming. As a current sink it is ideal for LED lighting applications or current limiter for power supplies. The device is provided in a lead (Pb) free, SOT23-6 package.