LTC1434 Selling Leads, Price trend, LTC1434 DataSheet download, circuit diagram from SeekIC.com

Features: *High Efficiency: Up to 93%* Constant Frequency Adaptive Power TM Operation* Input Voltage Range: 3V to 13.5V* Internal 0.6Ω Power Switch (VIN = 10V)*Low Dropout Operation: 100% Duty Cycle*Low-Battery Detector*Internal Power-On Reset Timer*Current Mode Operation for Excellent Line ...

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SeekIC No. : 004401583 Detail

LTC1434: Features: *High Efficiency: Up to 93%* Constant Frequency Adaptive Power TM Operation* Input Voltage Range: 3V to 13.5V* Internal 0.6Ω Power Switch (VIN = 10V)*Low Dropout Operation: 100% Duty...

LTC1434 Data Sheet

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Part Number:: LTC1434
Supply Ability:: 5000

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Product Details

Description

Features:

*High Efficiency: Up to 93%
* Constant Frequency Adaptive Power^TM Operation
* Input Voltage Range: 3V to 13.5V
* Internal 0.6Ω Power Switch (VIN = 10V)
*Low Dropout Operation: 100% Duty Cycle
*Low-Battery Detector
*Internal Power-On Reset Timer
*Current Mode Operation for Excellent Line and Load
Transient Response
*Low Quiescent Current: 470µA
* Shutdown Mode Draws Only 15µA Supply Current
* ±1% Reference Accuracy
* Available in 16- and 20-Lead Narrow SSOP

Application

* Cellular Telephones
* Portable Instruments
* Wireless Modems
* RF Communications
* Distributed Power Systemsn
* Scanners
* Battery-Powered Equipment

Pinout

Connection Diagram

Specifications

Input Supply Voltage (PWRVIN, SVIN) ... 13.5V to 0.3V
DC Small Switch Current (SSW) ............................ 100mA
Peak Small Switch Current (SSW) ........................ 300mA
Small Switch Voltage
(SSW) ................................. (VIN + 0.3V) to (VIN 13.5V)
DC Large Switch Current (BSW) ........................... 600mA
Peak Large Switch Current (BSW) .............................. 1.2A
Large Switch Voltage
(BSW) ................................ .(VIN + 0.3V) to (VIN 13.5V)
PLLIN, PLL LPF, ITH, COSC ..........................2.7V to 0.3V
POR, LBO ......................................................12V to 0.3V
LBI, V ...........................................................10V to 0.3V
RUN/SS, VPROG Voltages
VIN 11.7V ................................................12V to 0.3V
VIN < 11.7V.................................... (VIN + 0.3V) to 0.3V
Commercial Temperature Range
LTC1433C/LTC1434C ................................... 0°C to 70°C
Extended Commercial Operating Temperature
Range (Note 2) ....................................... 40°C to 85°C
Industrial Temperature Range (Note 3)
LTC1433I/LTC1434I ........................... ..... 40°C to 85°C
Junction Temperature (Note 4) ................................ 125°C
Storage Temperature Range .................. 65°C to 150°C
Lead Temperature (Soldering, 10 sec)..................... 300°C

Description

The LTC® 1433/LTC1434 are monolithic pulse width modulated step-down DC/DC converters. By utilizing current mode switching techniques, they provide excellent AC and DC load and line regulation. Both devices operate at a fixed frequency with the LTC1434 phase-lockable to an external clock signal.

The LTC1433/LTC1434 incorporate two internal P-channel power MOSFETs with a parallel combined resistance of 0.6Ω (at a supply of 10V). The Adaptive Power output stage selec- tively drives one or both of the switches at frequencies up to 700kHz to reduce switching losses and maintain high efficiencies at low output currents.

The LTC1433/LTC1434 are capable of supplying up to 450mA of output current and boasts a ±2.4% output voltage accuracy. An internal low-battery detector has the same level of accuracy as the output voltage. A power-on reset timer (POR) is included which generates a signal delayed by 65536 / fCLK (300ms typ) after the output is within 5% of the regulated output voltage.

Ideal for current sensitive applications, The LTC1433/LTC1434 draw only 470µA of quiescent current. In shutdown the devices draw a mere 15µA. To further maximize the life of the battery source, the internal P-channel MOSFET switch is turned on continuously in dropout.

LTC1434

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