Datasheet ISL97634 (Intersil) - 3

link to page 3 link to page 3 link to page 3 ISL97634 Pin Configuration ISL97634 (8 LD TDFN) TOP VIEW
GND 1 8 LX VIN 2 7 VOUT THERMAL PWM/EN 3 PAD 6 FBSW NC 4 5 FB
Pin Descriptions PIN NUMBER PIN NAME DESCRIPTION 1 GND Ground Pin. Connect to local ground. 2 VIN Input Supply Pin. Connect to the input supply voltage, the inductor and the input supply decoupling capacitor. 3 PWM/EN PWM or Enable Pin. Connect external PWM signal allows pulse width modulation current operation. Enable signal allows peak current operation or disable signal shuts down the device. 4 NC No Connect 5 FB Feedback Pin. Connect the sense resistor between FB and ground. The cathode of bottom LED can also be connected at this pin if the output current is not to be PWMed. 6 FBSW FB Disconnect Switch. Connect to the cathode of the bottom LED if the output current to be PWMed. 7 VOUT Output Pin. Connect to the anode of the top LED and the output filter capacitor. 8 LX Switching Pin. Connect to inductor. PAD Connect to ground plane on the PCB to maximize thermal performance. Ordering Information PACKAGE PART NUMBER PART OVP OPTIONS TEMP RANGE Tape and Reel PKG. (Notes 1, 2, 3) MARKING (V) (°C) (Pb-free) DWG. # ISL97634IRT14Z-T ELE 14 -40 to +85 8 Ld 2x3 TDFN L8.2x3A ISL97634IRT14Z-TK ELE 14 -40 to +85 8 Ld 2x3 TDFN L8.2x3A ISL97634IRT18Z-T ELF 18 -40 to +85 8 Ld 2x3 TDFN L8.2x3A ISL97634IRT18Z-TK ELF 18 -40 to +85 8 Ld 2x3 TDFN L8.2x3A ISL97634IRT26Z-T ELG 26 -40 to +85 8 Ld 2x3 TDFN L8.2x3A ISL97634IRT26Z-TK ELG 26 -40 to +85 8 Ld 2x3 TDFN L8.2x3A NOTES: 1. Please refer to TB347 for details on reel specifications 2. These Intersil Pb-free plastic packaged products employ special Pb-free material sets, molding compounds/die attach materials, and 100% matte tin plate plus anneal (e3 termination finish, which is RoHS compliant and compatible with both SnPb and Pb-free soldering operations). Intersil Pb-free products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020. 3. For Moisture Sensitivity Level (MSL), please see device information page for ISL97634. For more information on MSL please see tech brief TB363. FN6264 Rev 4.00 Page 3 of 12 August 27, 2013