DATASHEET ISL97519A FN6683 Rev 3.00 600kHz/1.2MHz PWM Step-Up Regulator February 16, 2012 The ISL97519A is a high frequency, high efficiency step-up Features voltage regulator operated at constant frequency PWM mode. >90% Efficiency With an internal 2.0A, 200m MOSFET, it can deliver up to 1A output current at over 90% efficiency. Two selectable 2.0A, 200m Power MOSFET frequencies, 600kHz and 1.2MHz, allow trade offs between 2.3V to 5.5V Input smaller components and faster transient response. An 1.1*VIN up to 25V Output external compensation pin gives the user greater flexibility in setting frequency compensation allowing the use of low ESR 600kHz/1.2MHz Switching Frequency Selection Ceramic output capacitors. Adjustable Soft-Start When shut down, it draws <1A of current and can operate Internal Thermal Protection down to 2.3V input supply. These features, along with 1.2MHz 1.1mm Max Height 8 Ld MSOP Package switching frequency, make it an ideal device for portable equipment and TFT-LCD displays. Pb-Free (RoHS compliant) The ISL97519A is available in an 8 Ld MSOP package with a Halogen Free maximum height of 1.1mm. The device is specified for operation over the full -40C to +85C temperature range. Applications TFT-LCD displays DSL modems PCMCIA cards Digital cameras GSM/CDMA phones Portable equipment Handheld devices FSEL EN SS SHUTDOWN REFERENCE AND START-UP VDD OSCILLATOR GENERATOR CONTROL LX PWM LOGIC FET CONTROLLER DRIVER COMPARATOR CURRENT GND SENSE FB GM AMPLIFIER COMP FN6683 Rev 3.00 Page 1 of 9 February 16, 2012ISL97519A Pin Configuration ISL97519A (8 LD MSOP) TOP VIEW COMP SS 1 8 FB FSEL 2 7 EN VDD 3 6 GND 4 5 LX Pin Descriptions PIN NUMBER PIN NAME DESCRIPTION 1 COMP Compensation pin. Output of the internal error amplifier. Capacitor and resistor from COMP pin to ground. 2 FB Voltage feedback pin. Internal reference is 1.24V nominal. Connect a resistor divider from V . V = 1.24V (1 + R /R ). OUT OUT 1 2 See Typical Application Circuit on page 2. 3 EN Shutdown control pin. Pull EN low to turn off the device. 4 GND Analog and power ground. 5 LX Power switch pin. Connected to the drain of the internal power MOSFET. 6 VDD Analog power supply input pin. 7 FSEL Frequency select pin. When FSEL is set low, switching frequency is set to 620kHz. When connected to high or VDD, switching frequency is set to 1.25MHz. 8 SS Soft-start control pin. Connect a capacitor to control the converter start-up. Typical Application Circuit 1 COMP SS 8 R C 3 4 1k R 85.2k 1 27nF OPEN 2 FB FSEL 7 C R 5 2 C 5 4.7nF 10k 3 EN VDD 6 2.3V TO 5.5V C + C 2 1 22F 10H 0.1F 4 GND LX 5 12V S1 + C 3 D 1 22F Ordering Information PART NUMBER PART PACKAGE PKG. (Notes 2, 3) MARKING (Pb-Free) DWG. ISL97519AIUZ 7519A 8 Ld MSOP M8.118A ISL97519AIUZ-T (Note 1) 7519A 8 Ld MSOP M8.118A ISL97519AIUZ-TK (Note 1) 7519A 8 Ld MSOP M8.118A 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 ISL97519A. For more information on MSL please see techbrief TB363. FN6683 Rev 3.00 Page 2 of 9 February 16, 2012