Product Summary

The LTC1700EMS is a current mode synchronous step-up DC/DC controller that drives external N-channel and P-channel power MOSFETs using a constant frequency PWM architecture. Current limiting is provided by sensing the voltage drop across the main MOSFET, eliminating the need of a sense resistor. This No RSENSE technique helps the LTC1700EMS maintain high efficiency at heavy loads while Burst Mode operation ensures high efficiency at light loads, thus providing high efficiencies over a wide range of load currents. The applications of the LTC1700EMS include Cellular Telephones, Wireless Modems, RF Communications, 2.5V to 3.3V, 2.5V to 5V Converters, Battery-Powered Equipment and Telecom/Network Systems.

Parametrics

LTC1700EMS absolute maximum ratings: (1)Output Supply Voltage (VOUT): –0.3V to 6V; (2)RUN/SS, VFB Voltages: –0.3V to 2.4V; (3)SYNC/MODE, ITH Voltages: –0.3V to 6V; (4)SWITCH Voltage (SW): –0.3V to 6.5V; (5)TG, BG Peak Output Current (<10μs): 1A; (6)Operating Temperature Range: –40℃ to 85℃; (7)Junction Temperature: 125℃; (8)Storage Temperature Range: –65℃ to 150℃; (9)Lead Temperature (Soldering, 10 sec): 300℃.

Features

LTC1700EMS features: (1)High Efficiency: Up to 95%; (2)No Current Sense Resistor Required; (3)Constant Frequency 530kHz Operation Allows Small Size, Surface Mount Inductors; (4)OPTI-LOOPTM Compensation Minimizes COUT; (5)Selectable Burst ModeTM Operation; (6)Minimum Start-Up Voltage as low as 0.9V; (7)Synchronizable Between 400kHz and 750kHz; (8)Micropower Shutdown: 10μA; (9)Current Mode Operation for Excellent Line and Load Transient Response; (10)Soft-Start Reduces Supply Current Transients; (11)1.5% Output Voltage Accuracy; (12)Uses Low Value, Small Size, Surface Mount Inductors; (13)Available in 10-Lead MSOP Package.

Diagrams

LTC1700EMS typical applications

Image Part No Mfg Description Data Sheet Download Pricing
(USD)		 Quantity
LTC1700EMS
LTC1700EMS

IC REG CTRLR BST PWM CM 10-MSOP
Data Sheet
0-2300: $1.65
LTC1700EMS#PBF
LTC1700EMS#PBF

IC REG CTRLR BST PWM CM 10-MSOP
Data Sheet
0-1: $3.32
1-25: $2.20
25-100: $1.66
LTC1700EMS#TR
LTC1700EMS#TR

IC REG CTRLR BST PWM CM 10-MSOP
Data Sheet
0-2500: $1.73
LTC1700EMS#TRPBF
LTC1700EMS#TRPBF

IC REG CTRLR BST PWM CM 10-MSOP
Data Sheet
0-2500: $1.68