Product Summary

The LTC1627CS8#TR is a monolithic current mode synchronous buck regulator using a fixed frequency architecture. The operating supply range is from 8.5V down to 2.65V, making it suitable for one or two lithium-ion battery-powered applications. Burst Mode operation provides high efficiency at low load currents. 100% duty cycle provides low dropout operation, which extends operating time in battery-operated systems. The applications of the LTC1627CS8#TR include Cellular Telephones, Portable Instruments, Wireless Modems, RF Communications, Distributed Power Systems, Scanners, Single and Dual Cell Lithium.

Parametrics

LTC1627CS8#TR absolute maximum ratings: (1)Input Supply Voltage: -0.3V to 10V; (2)Driver Supply Voltage (VIN – VDR): -0.3V to 10V; (3)ITH Voltage: -0.3V to 5V; (4)Run/SS, VFB Voltages: -0.3V to VIN; (5)Sync/FCB Voltage: -0.3V to VIN; (6)VDR Voltage (VIN ≤ 5V): -5V to 0.3V; (7)P-Channel Switch Source Current (DC): 800mA; (8)N-Channel Switch Sink Current (DC): 800mA; (9)Peak SW Sink and Source Current: 1.5A; (10)Operating Ambient Temperature Range, Commercial: 0℃ to 70℃; Industrial: -40℃ to 85℃; (11)Junction Temperature (Note 2): 125℃; (12)Storage Temperature Range: -65℃ to 150℃; (13)Lead Temperature (Soldering, 10 sec): 300℃.

Features

LTC1627CS8#TR features: (1)High Efficiency: Up to 96%; (2)Constant Frequency 350kHz Operation; (3)2.65V to 8.5V VIN Range; (4)VOUT from 0.8V to VIN, IOUT to 500mA; (5)No Schottky Diode Required; (6)Synchronizable Up to 525kHz; (7)Selectable Burst ModeTM Operation; (8)Low Dropout Operation: 100% Duty Cycle; (9)Precision 2.5V Undervoltage Lockout; (10)Secondary Winding Regulation; (11)Current Mode Operation for Excellent Line and Load Transient Response; (12)Low Quiescent Current: 200mA; (13)Shutdown Mode Draws Only 15mA Supply Current; (14)±1.5% Reference Accuracy; (15)Available in 8-Lead SO Package.

Diagrams

LTC1627CS8#TR block diagram

Image Part No Mfg Description Data Sheet Download Pricing
(USD)
Quantity
LTC1627CS8#TR
LTC1627CS8#TR


IC REG BUCK SYNC ADJ 0.5A 8SOIC

Data Sheet

0-5000: $1.35
LTC1627CS8#TRPBF
LTC1627CS8#TRPBF


IC REG BUCK SYNC ADJ 0.5A 8SOIC

Data Sheet

0-2500: $1.34