DATASHEET ISL97656 FN6439 Rev 6.00 Step-Up Regulator with 4A Integrated Switch July 19, 2012 The ISL97656 is a high frequency, high efficiency current Features mode control non-synchronous step-up voltage regulator 4.0A, Low r Integrated Low Side MOSFET operated at constant PMW switching frequency. It has an DS(ON) internal 4.0A, 120m Low side MOSFET and can deliver high +2.2V to +6.0V Operating Input Voltage Range output current and efficiency over 90%. The selectable 640kHz +1.1*VIN to +24V Output Voltage Range and 1.22MHz switching frequency allows use of smaller 640kHz or 1.22MHz Switching Frequency inductor and faster transient response. An external compensation pin gives the user flexibility in setting frequency Higher Efficiency and Better Thermal Performance compensation allowing the use of low ESR ceramic output Adjustable Soft-Start capacitors. Internal Thermal Protection When in shut down mode, ISL97656 draws current <1A and 0.8mm Maximum Height 10 Ld TDFN Package can operate at as low as 2.2V input. These features along with higher switching frequency allows use of tiny external Pb-Free (RoHS Compliant) components and makes it an ideal device for portable Halogen Free equipment and TFT-LCD displays. The ISL97656 is available in a 10 Ld TDFN package with a Applications maximum height of 1.1mm. The device is specified for Portable Equipment, Digital Cameras operation over the full -40C to +85C temperature range. TFT-LCD Displays, DSL Modems PCMCIA Cards, GSM/CDMA Phones Ordering Information PART Pin Configuration NUMBER PART PACKAGE PKG. ISL97656 (Notes 1, 2, 3) MARKING (Pb-Free) DWG. (10 LD TDFN) TOP VIEW ISL97656IRTZ 656Z 10 Ld TDFN L10.3x3B NOTES: 1. Add -T* suffix for tape and reel. Please refer to TB347 for details COMP SS 1 10 on reel specifications. 2. These Intersil Pb-free plastic packaged products employ special FB 2 9 FREQ Pb-free material sets, molding compounds/die attach materials, EN 3 8 VIN and 100% matte tin plate plus anneal (e3 termination finish, which is RoHS compliant and compatible with both SnPb and Pb-free 4 7 GND LX soldering operations). Intersil Pb-free products are MSL classified LX at Pb-free peak reflow temperatures that meet or exceed the GND 5 6 Pb-free requirements of IPC/JEDEC J STD-020. 3. For Moisture Sensitivity Level (MSL), please see device information page for ISL97656. For more information on MSL please see techbrief TB363. 1 COMP SS 10 C3 R3 R1 86.6k 27nF 3.9k 2 FB FREQ 9 R2 C5 10k INPUT 3 EN VIN 8 4.7nF 2.2V TO 6V 10H 4 GND LX 7 C4 C3 0.1F 22F 5 6 GND LX OUTPUT 12V D1 C2 22F FIGURE 1. TYPICAL APPLICATION CIRCUIT FN6439 Rev 6.00 Page 1 of 9 July 19, 2012ISL97656 Absolute Maximum Ratings (T = +25C) Thermal Information A Temperature Under Bias -40C to +85C Thermal Resistance (Typical) (C/W) (C/W) JA JC Storage Temperature -65C to +150C 10 Ld TDFN Package (Notes 4, 5) . 53 3 Terminal Voltage with Respect to GND: Pb-Free Reflow Profile . see link below VIN to GND 6.5V