LTC1708-PG

PRODUCTION

Dual Adjustable 5-Bit VID High Efficiency, 2-Phase Current Mode Synchronous Buck DC/DC Regulator Controller

Part Models: 2
1ku List Price: Starting From $5.79

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Overview

Out-of-Phase Controllers Reduce Input Capacitance
and Power Supply Induced Noise
OPTI-LOOP^® Compensation Minimizes C_OUT
Power Good Output Monitors Both Outputs
5-Bit Mobile VID Control, V_OUT: 0.9V to 2.0V
Dual N-Channel MOSFET Synchronous Drive
±1% Output Voltage Accuracy
DC Programmed Fixed Frequency 150kHz to 300kHz
Wide V_IN Range: 3.5V to 36V Operation
Very Low Dropout Operation: 99% Duty Cycle
Adjustable Soft-Start Current Ramping
Foldback Output Current Limiting
Latched Short-Circuit Shutdown with Defeat Option
Output Overvoltage Protection
Remote Output Voltage Sense
Low Shutdown Current: 20µA
5V and 3.3V Standby Regulators
Selectable Constant Frequency, Burst Mode^® and
Continuous Operation

The LTC1708 is a dual adjustable 5-bit VID programmable step-down switching regulator controller that drives all N-Channel power MOSFET stages. A constant frequency current mode architecture allows adjustment of the frequency up to 300kHz. Power loss and noise due to the ESR of the input capacitance are minimized by operating the two main controller output stages out of phase.

OPTI-LOOP compensation allows the transient response to be optimized over a wide range of output capacitance and ESR values. The precision 0.8V reference is compatible with future microprocessor generations, and a wide 3.5V to 30V (36V maximum) input supply range that encompasses all battery chemistries. A power good output indicates when the output voltages are within 7.5% of their programmed value.

A RUN/SS pin for each controller provides both soft-start and an optional timed, short-circuit shutdown. Other protection features include: internal foldback current limiting and an output overvoltage crowbar. The forced continuous control pin (FCB) can be used to inhibit BurstMode operation or to regulate a third, flyback output.

Applications

Notebook and Palmtop Computers, PDAs
Portable Instruments

Part Models: 2
1ku List Price: Starting From $5.79

Documentation

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
LTC1708EG-PG#PBF	36-Lead SSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1708EG-PG#TRPBF	36-Lead SSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Nov 18, 2019 - 19_0266 Laser Top Mark for SSOP36/44/48 Packages assembled in ADPG and UTAC
		PCN19_0266_Form Material_Report Detailed Parts List
LTC1708EG-PG#PBF	PRODUCTION
LTC1708EG-PG#TRPBF	PRODUCTION

This is the most up-to-date revision of the Data Sheet.

Software Resources

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Hardware Ecosystem

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Circuit Monitors 1
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Power System Management (PSM) & Sequencers 1
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Protection Switches & Controllers 1
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Switching Regulators & Controllers 1
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