ADP1613

Data Sheet 650 kHz /1.3 MHz Step-Up PWM DC-to-DC Switching Converters ADP1612/ADP1613 FEATURES Current limit 1.4 A for the ADP1612 2.0 A for the ADP 1613 Minimum input voltage 1.8 V for the ADP1612 2.5 V for the ADP1613 Pin-selectable 650 kHz or 1.3 MHz PWM frequency Adjustable output voltage up to 20 V Adjustable soft start Undervoltage lockout Thermal shutdown 8-lead MSOP Supported by ADIsimPower™ design tool ADIsimPower downloadable design tools for boost, coupled- SEPIC, and SEPIC Cuk configurations APPLICATIONS TFT LCD bias supplies Portable applications Industrial/instrumentation equipment TYPICAL APPLICATION CIRCUIT L1 ADP1612/ VIN ADP1613 6 VIN SW 5 ON OFF 3 EN CIN 1.3MHz 650kHz 7 FREQ (DEFAULT) FB 2 8 SS COMP 1 CSS GND 4 D1 VOUT R1 R2 RCOMP CCOMP COUT Figure 1. Step-Up Regulator Configuration 06772-001 GENERAL DESCRIPTION The ADP1612/ADP1613 are step-up dc-to-dc switching converters with an integrated power switch capable of providing an output voltage as high as 20 V. With a package height of less than 1.1 mm, the ADP1612/ADP1613 are optimal for spaceconstrained applications such as portable devices or thin film transistor (TFT) liquid crystal displays (LCDs). The ADP1612/ADP1613 operate in current mode pulse-width modulation (PWM) with up to 94% efficiency. Adjustable soft start prevents inrush currents when the part is enabled. The pin-selectable switching frequency and PWM current-mode architecture allow for excellent transient response,...