Product Summary

The LTC1541CMS8#TRPBF is a dual, synchronous stepdown switching regulator controller which drives external N-channel power MOSFETs in a phase-lockable fixed frequency architecture. The Adaptive Power output stage selectively drives two N-channel MOSFETs at frequencies up to 400kHz while reducing switching losses to maintain high efficiencies at low output currents. The applications of the LTC1541CMS8#TRPBF include Notebook and Palmtop Computers, PDAs, Portable Instruments, Battery-Operated Devices, DC Power Distribution Systems.

Parametrics

LTC1541CMS8#TRPBF absolute maximum ratings: (1)Input Supply Voltage (VIN): 36V to -0.3V; (2)Topside Driver Voltage (BOOST 1, 2): 42V to -0.3V; (3)Peak Switch Voltage > 10ms (SW 1, 2): VIN + 5V to -5V; (4)EXTVCC Voltage: 10V to -0.3V; (5)POR1, LBO Voltages: 12V to -0.3V; (6)AUXFB Voltage: 20V to -0.3V; (7)AUXDR Voltage: 28V to -0.3V; (8)VOSENSE2 Voltages: INTVCC + 0.3V to -0.3V; (9)VPROG1, VPROG2 Voltages: INTVCC to -0.3V; (10)PLL LPF, ITH1, ITH2 Voltages: 2.7V to -0.3V.

Features

LTC1541CMS8#TRPBF features: (1)Maintains Constant Frequency at Low Output Currents; (2)Dual N-Channel MOSFET Synchronous Drive; (3)Programmable Fixed Frequency (PLL Lockable); (4)Wide VIN Range: 3.5V to 36V Operation; (5)Ultrahigh Efficiency; (6)Very Low Dropout Operation: 99% Duty Cycle; (7)Low Dropout, 0.5A Linear Regulator for VPP Generation or Low Noise Audio Supply; (8)Built-In Power-On Reset Timer; (9)Programmable Soft Start; (10)Low-Battery Detector; (11)Remote Output Voltage Sense; (12)Foldback Current Limiting (Optional); (13)Pin Selectable Output Voltage; (14)5V Standby Regulator Active in Shutdown: IQ < 200mA; (15)Output Voltages from 1.19V to 9V; (16)Available in 28- and 36-Lead SSOP Packages.

Diagrams

LTC1541CMS8#TRPBF block diagram

Image Part No Mfg Description Data Sheet Download Pricing
(USD)
Quantity
LTC1541CMS8#TRPBF
LTC1541CMS8#TRPBF


IC OPAMP/COMP/REF MICRPWR 8MSOP

Data Sheet

0-2500: $1.20
Image Part No Mfg Description Data Sheet Download Pricing
(USD)
Quantity
LTC1040
LTC1040

Other


Data Sheet

Negotiable 
LTC1040CN
LTC1040CN


IC COMPARATOR LOW PWR DUAL 18DIP

Data Sheet

0-3240: $1.32
LTC1040CN#PBF
LTC1040CN#PBF


IC COMPARATOR LOW PWR DUAL 18DIP

Data Sheet

0-1: $2.33
1-25: $1.55
25-100: $1.32
LTC1040CSW
LTC1040CSW


IC COMPARATOR LOW PWR DUAL18SOIC

Data Sheet

0-2720: $1.71
LTC1040CSW#PBF
LTC1040CSW#PBF


IC COMPARATOR LOW PWR DUAL18SOIC

Data Sheet

0-280: $1.71
LTC1040CSW#TR
LTC1040CSW#TR


IC COMPARATOR DUAL LOWPWR 18SOIC

Data Sheet

0-3000: $1.74