ADP3026

FEATURES Wide input voltage range: 5.5 V to 25 V High conversion efficiency > 96% Integrated current sense—no external resistor required Low shutdown current: 19 µA (typical) Voltage mode PWM with input feed-forward for fast line transient response Dual synchronous buck controllers Built-in gate drive boost circuit for driving external N-channel MOSFETs 2 fixed output voltages: 3.3 V and 5 V PWM frequency: 200 kHz Extensive circuit protection functions APPLICATIONS Portable instruments General-purpose dc-to-dc converters High Efficiency Dual Power Supply Controller ADP3026 GENERAL DESCRIPTION The ADP3026 is a highly efficient dual synchronous buck switching regulator controller optimized for converting a battery or adapter input into multiple supply voltages. The ADP3026 provides accurate and reliable short-circuit protection using an internal current sense circuit, which reduces cost and increases overall efficiency. Other protection features include programmable soft start, UVLO, and integrated output undervoltage/overvoltage protection. The ADP3026 is specified over the 0°C to 70°C commercial temperature range and is available in a 28-lead TSSOP package. VIN 5.5V TO 25V Q3 L2 5V Q4 FUNCTIONAL BLOCK DIAGRAM 5V LINEAR REF 5V SMPS 3.3V SMPS Q1 L1 Q2 3.3V SS5 SS3 02950-001 PWRGD POWER-ON RESET ADP3026 Figure 1. Rev. 0 Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its u...