Product Summary

The LTC1732EMS-4 is a 5-lead SOT-23 step down, current mode, DC/DC converter. Intended for small to medium power applications, it operates from 2.5V to 5.5V input voltage range and switches at 1MHz, allowing the use of tiny, low cost capacitors and inductors 2mm or less in height. The output voltage is adjustable from 1.25V to 5V. A built-in 0.28Ω switch allows up to 0.5A of output current at high efficiency. OPTI-LOOPTM compensation allows the transient response to be optimized over a wide range of loads and output capacitors. The applications of the LTC1732EMS-4 are (1)PDAs/Palmtop PCs; (2)Digital Cameras; (3)Cellular Phones; (4)Portable Media Players; (5)PC Cards; (6)Handheld Equipment.

Parametrics

LTC1732EMS-4 absolute maximum ratings: (1)(Voltages Referred to GND Pin), VIN Voltage (Pin 5): –0.3V to 6V; (2)ITH/RUN Voltage (Pin 4):–0.3V to 3V; (3)VFB Voltage (Pin 3):–0.3V to 3V; (4)Peak Switch Current (Pin 1): 1.3A; (5)VIN – SW (Max Switch Voltage): 8.5V to –0.3V; (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

LTC1732EMS-4 features: (1)Tiny 5-Lead SOT-23 Package; (2)Uses Tiny Capacitors and Inductor; (3)High Frequency Operation: 1MHz; (4)High Output Current: 500mA; (5)Low RDS(ON) Internal Switch: 0.28Ω; (6)High Efficiency: Up to 94%; (7)Current Mode Operation for Excellent Line and Load Transient Response; (8)Short-Circuit Protected; (9)Low Quiescent Current: 135μA; (10)Low Dropout Operation: 100% Duty Cycle; (11)Ultralow Shutdown Current: IQ < 1μA; (12)Peak Inductor Current Independent of Inductor Value; (13)Output Voltages from 5V Down to 1.25V.

Diagrams

LTC1732EMS-4 pin connection

Image Part No Mfg Description Data Sheet Download Pricing
(USD)
Quantity
LTC1732EMS-4
LTC1732EMS-4


IC CTRLR CHRG LIION CC/CI 10MSOP

Data Sheet

0-2750: $1.39
LTC1732EMS-4#PBF
LTC1732EMS-4#PBF


IC CTRLR BATT CHRG LI-ION 10MSOP

Data Sheet

0-550: $1.39
LTC1732EMS-4#TR
LTC1732EMS-4#TR


IC CTRLR BATT CHRG LI-ION 10MSOP

Data Sheet

0-5000: $1.46
LTC1732EMS-4#TRPBF
LTC1732EMS-4#TRPBF


IC CTRLR BATT CHRG LI-ION 10MSOP

Data Sheet

0-2500: $1.42
LTC1732EMS-4.2
LTC1732EMS-4.2


IC CTRLR BATT CHRG LI-ION 10MSOP

Data Sheet

0-2750: $1.39
LTC1732EMS-4.2#PBF
LTC1732EMS-4.2#PBF


IC CTRLR BATT CHRG LI-ION 10MSOP

Data Sheet

0-300: $1.39
LTC1732EMS-4.2#TRPBF
LTC1732EMS-4.2#TRPBF


IC CTRLR CHRGR LI-ION 10-MSOP

Data Sheet

0-2500: $1.42