SC1630 Datasheet | SEMTECH

DESCRIPTION The SC1630 is a DC-DC converter designed to drive an external power switch for more flexibility, especially in higher voltage and larger power applications. Typically six ponents are required to set up a step-up configuration easily achieving an efficiency beyond 80%. A few more ponents are required to set up a step down configuration delivering 4A load current with 83% typical efficiency, 86% at 2A load, and 300µA quiescent current. The output voltage can be internally set to 5V or externally set to an arbitrary value below breakdown voltage of the power switch. Logic-controlled shutdown mode is provided for power-saving. The low battery detector can also be configured as a linear regulator. A 120k Hz switching rate reduces the inductor size. Inductors of 25µH to 50µH inductance are remended for most applications. Features - Default +5V output voltage - Adjustable output voltage with two resistors - Power-saving shutdown mode (7µA typical) - 120k Hz switching rate - On-chip low battery detector BLOCK DIAGRAM APPLICATIONS - Palmtop and notebook puters - Battery charger supply - Cellular telephones - LCD contrast supply - Flash memory programmer - Battery backup supplies - Portable instruments PIN CONFIGURATION ORDERING INFORMATION DEVICE (1) PACKAGE SO-8 SC1630CS Note: (1) Add suffix ‘TR’ for tape and reel. ABSOLUTE MAXIMUM RATINGS Parameter Supply Voltage Operating Temperature Range Storage Temperature Range Symbol VIN TA TSTG Maximum 7.0 0 to 70 -65 to 125 Units V °C °C © 1997 SEMTECH CORP. 652 MITCHELL ROAD NEWBURY PARK CA 91320 LOW VOLTAGE MULTI-MODE DC-DC CONVERTER January 30, 1998 ELECTRICAL CHARACTERISTICS Unless otherwise specified, TA = 25°C, VIN = 3.0V Parameter Input Voltage Default Output Voltage Switch Off Current Shutdown Mode Current Recovery Time from Shutdown Efficiency Line Regulation Load Regulation Oscillator Frequency LBI Pin Trip Point EXT Pin Driving Capabilities Pin 8 = 5V, Pin 3 = 0.85V Sourcing Sinking VIN = 2V...