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LTC3785-1

Features: ·Single Inductor Architecture Allows VIN Above, Below or Equal to VOUT·Power Good Output Indicator·2.7V to 10V Input and Output Range·Up to 96% Ef ciency·Up to 10A of Output Current·All N-Channel MOSFETs, No RSENSETM·True Output Disconnect During Shutdown·Programmable Current Limit and S...

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SeekIC No. : 004402347 Detail

LTC3785-1: Features: ·Single Inductor Architecture Allows VIN Above, Below or Equal to VOUT·Power Good Output Indicator·2.7V to 10V Input and Output Range·Up to 96% Ef ciency·Up to 10A of Output Current·All N-...

LTC3785-1 Data Sheet

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Part Number:
LTC3785-1
Supply Ability:
5000

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  • 1~5000
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  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Product Details

Description



Features:

·Single Inductor Architecture Allows VIN Above, Below or Equal to VOUT
·Power Good Output Indicator
·2.7V to 10V Input and Output Range
·Up to 96% Ef ciency
·Up to 10A of Output Current
·All N-Channel MOSFETs, No RSENSETM
·True Output Disconnect During Shutdown
·Programmable Current Limit and Soft-Start
·Optional Short-Circuit Shutdown Timer
·Output Overvoltage and Undervoltage Protection
·Programmable Frequency: 100kHz to 1MHz
·Selectable Burst Mode®  Operation
·Available in 24-Lead (4mm×4mm) Exposed Pad QFN Package


Application

· Palmtop Computers
· Handheld Instruments
· Wireless Modems
· Cellular Telephones


Pinout

Connection Diagram


Specifications

Input Supply Voltage (VIN)  .........................-0.3V to 11V
ISVOUT, ISVIN ..............................................-0.3V to 11V
SW1, SW2, ISSW1, ISSW2  Voltage:
  DC ...............................................................-1V to 11V
 Pulsed, <1s ................................................-2V to 12V
RUN/SS, MODE, CCM,VDRV, VCC Voltages......-0.3V to 6V
PGOOD Voltage ...........................................-0.3V to 6V
 TG1, VBST1 Voltage ...................................-0.3V to 16V
 With Respect to SW1 ..................................-0.3V to 6V
TG2, VBST2 Voltage ....................................-0.3V to 16V
 With Respect to SW2 ..................................-0.3V to 6V
BG1, BG2 Voltage ........................................-0.3V to 6V
Peak Driver Output Current < 10s
(TG1, TG2, BG1, BG2) ................................................3A
 VCC Average Output Current ............................100mA
Operating Temperature Range..................-40 to 85
Storage Temperature Range ...................-65 to 125


Description

The LTC® 3785-1 is a high power synchronous buck-boost controller that drives all N-channel power MOSFETs from input voltages above, below and equal to the output voltage. With an input range of 2.7V to 10V, the LTC3785-1 is well suited for a wide variety of single or dual cell Li-Ion or multi-cell alkaline/NiMH applications.

The operating frequency can be programmed from 100kHz to 1MHz. The soft-start time and current limit are also programmable. The soft-start capacitor doubles as the fault timer which can program the IC to latch off or recycle after a determined off time. Burst Mode operation is user controlled and can be enabled by driving the MODE pin high. The LTC3785-1 includes a Power Good output that indicates when the output voltage is within 7.5% of its
designed setpoint.

Protection features include foldback current limit, short-circuit and overvoltage protection.




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