Datasheet Linear Technology LT8709IFE#PBF — Datenblatt

LT8709
Negative Input
Synchronous Multi-Topology
DC/DC Controller
DESCRIPTION FEATURES
Wide Negative Input Range: –4.5V to –80V
Rail-to-Rail Output Current Monitor and Control
Input Voltage Regulation for High Impedance Inputs
Power Good Indication Pin
MODE Pin for Forced CCM (Continuous Conduction
Mode) or Pulse-Skipping/DCM (Discontinuous
Conduction Mode) Operatio Switching Frequency Up to 750kHz
n Easily Configurable as a Buck, Boost, Buck-Boost, or
Inverting Converter with a Single Feedback Pi Can be Synchronized to an External Clock
n High Gain EN/FBIN Pin Accepts Slowly Varying Input
Signals
n 20-Lead TSSOP Package n n n n The LT®8709 is a synchronous PWM controller for negativeto-negative or negative-to-positive DC/DC conversion,
with rail-to-rail output current monitor and control. The
LT8709 is ideal for many local power supply designs. It
can be easily configured in buck, boost, buck-boost, and
inverting topologies with negative input voltages. n In addition, the LT8709’s rail-to-rail output current sense
allows the part to be configured in current limited applications such as battery or capacitor charging. The PG pin
is used for power good indication. …