DATA SHEET www.onsemi.com Constant Current LED Driver with 32 Dimming Levels and Rset UDFN8 SC706 HU2G SUFFIX SD SUFFIX CASE 517AW CASE 419AD CAT4002A, CAT4004A Description The CAT4002A and CAT4004A provide respectively two and four matched low dropout current sources to drive LEDs. The CAT400XA PIN CONNECTIONS uses an external resistor RSET to set the current in the LED channels. Each LED channel includes an individual control loop allowing the device to handle a wide range of LED forward voltages while still 1 maintaining tight current matching. VIN EN/DIM The EN/DIM logic inputs supports device enable and a digital GND RSET dimming interface for setting the LED channel current with 32 linear LED1 LED4 dimming levels. LED2 LED3 LEDs can be powered directly from a Lithiumion battery due to the CAT4004A low dropout (50 mV at 20 mA) current sinks. The device is available UDFN8 in the tiny 8pad UDFN 2 mm x 2 mm package with a max height of 0.55 mm, as well as the 6lead SC70. 1 EN/DIM LED1 Features 2 and 4 LED Current Sinks with Tight Matching RSET GND 32 Dimming Levels VIN LED2 Low Dropout Driver 50 mV at 20 mA CAT4002A No Switching Noise SC706 Shutdown Current less than 1 A (Top Views) LED Current set by External Resistor Dimming via 1wire EZDim Interface Thermal Shutdown Protection 6lead SC70, and 8pad UDFN 2 mm x 2 mm Packages ORDERING INFORMATION These Devices are PbFree, Halogen Free/BFR Free and are RoHS See detailed ordering and shipping information in the package Compliant dimensions section on page 8 of this data sheet. Applications LCD Display Backlight Digital Still Cameras Cellular Phones Handheld Devices V IN 2.4 V 20 mA C IN to 5.5 V 1 F LED1 LED2 LED3 LED4 VIN One wire CAT4004A EN/DIM programming RSET RSET GND 3.74 k Figure 1. Typical Application Circuit Semiconductor Components Industries, LLC, 2011 1 Publication Order Number: October, 2021 Rev. 3 CAT4002A/DCAT4002A, CAT4004A MARKING DIAGRAMS BGA VJA YM UDFN8 (2 x 2 mm) SC706 BG = CAT4004A Device Code VJ = CAT4002A Device Code A = Assembly Location Code A = Assembly Location Code Y = Production Year (last digit) M = Production Month: 1 9, A, B, C Table 1. ABSOLUTE MAXIMUM RATINGS Parameter Rating Unit VIN, LEDx, RSET 6 V EN/DIM Voltage 6 V Storage Temperature Range 65 to +160 C Junction Temperature Range 40 to +125 C Lead Temperature 300 C Stresses exceeding those listed in the Maximum Ratings table may damage the device. If any of these limits are exceeded, device functionality should not be assumed, damage may occur and reliability may be affected. Table 2. ELECTRICAL OPERATING CHARACTERISTICS (Min and Max values are over recommended operating conditions unless specified otherwise. Typical values are at V = 4.0 V, EN/DIM = High, and T = 25C.) IN AMB Symbol Name Conditions Min Typ Max Units I Quiescent Current No load, RSET = Float 0.2 mA Q No load, RSET = 4.8 k 0.5 I Shutdown Current V = 0 V 1 A QSHDN EN/DIM I LED Current Setting RSET = 3.0 k 25 mA LED 15 RSET = 4.99 k I LED Current Accuracy 1 mA I 40 mA 1 % LED ACC LED I LED Channel Matching (Note 1) 5 1 +5 % I I LED DEV LED LEDAVG I LEDAVG V RSET pin regulated voltage 0.57 0.6 0.63 V RSET V Dropout Voltage I = 20 mA 50 mV DOUT LED (90% of nominal LED current) I = 1 mA 25 LED EN/DIM Pin R Internal pulldown resistor 200 k EN/DIM V Logic High Level 1.3 V HI V Logic Low Level 0.4 V LO T Thermal Shutdown 150 C SD T Thermal Hysteresis 20 C HYS V Undervoltage lockout (UVLO) threshold 2.0 V UVLO 1. For CAT4004A, I = (I + I + I + I ) / 4 LEDAVG LED,CH1 LED,CH2 LED,CH3 LED,CH4 For CAT4002A, I = (I + I ) / 2 LEDAVG LED,CH1 LED,CH2 www.onsemi.com 2