LTC1709EG-8#PBF

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Analog Devices

2-PHASE, 5-BIT VID, CURRENT MODE, HIGH EFFICIENCY, SYNCHRONOUS STEP-DOWN SWITCHING REGULATORS

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DocumentsR384 Reliability Data Datasheet

LTC1709EG-8#PBF

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Analog Devices

2-PHASE, 5-BIT VID, CURRENT MODE, HIGH EFFICIENCY, SYNCHRONOUS STEP-DOWN SWITCHING REGULATORS

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DocumentsR384 Reliability Data Datasheet

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Technical Specifications

Parameters and characteristics for this part

Specification	LTC1709EG-8#PBF

Clock Sync	False
Control Features	Enable, Power Good, Soft Start
Duty Cycle (Max) [Max]	99.5 %
Frequency - Switching [Max]	320 kHz
Frequency - Switching [Min]	140 kHz
Function	Step-Down
Mounting Type	Surface Mount
Number of Outputs	2
Operating Temperature [Max]	85 °C
Operating Temperature [Min]	-40 °C
Output Configuration	Positive
Output Phases	2
Output Type	Transistor Driver
Package / Case	36-SSOP
Package / Case [x]	5.3 mm, 0.209 "
Supplier Device Package	36-SSOP
Synchronous Rectifier	True
Topology	Buck
Voltage - Supply (Vcc/Vdd) [Max]	36 V
Voltage - Supply (Vcc/Vdd) [Min]	4 V

LTC1709-85 Series

2-Phase, 5-Bit VID, Current Mode, High Efficiency, Synchronous Step-Down Switching Regulators

Part	Voltage - Supply (Vcc/Vdd) [Min]	Voltage - Supply (Vcc/Vdd) [Max]	Supplier Device Package	Duty Cycle (Max) [Max]	Control Features	Operating Temperature [Max]	Operating Temperature [Min]	Package / Case [x]	Package / Case	Output Type	Topology	Frequency - Switching [Max]	Frequency - Switching [Min]	Mounting Type	Output Configuration	Output Phases	Function	Number of Outputs
Analog Devices LTC1709EG-8#PBF	4 V	36 V	36-SSOP	99.5 %	Enable Power Good Soft Start	85 °C	-40 °C	0.209 " 5.3 mm	36-SSOP	Transistor Driver	Buck	320 kHz	140 kHz	Surface Mount	Positive	2	Step-Down	2
Analog Devices LTC1709EG-9#PBF	4 V	36 V	36-SSOP	99.5 %	Enable Power Good Soft Start	85 °C	-40 °C	0.209 " 5.3 mm	36-SSOP	Transistor Driver	Buck	320 kHz	140 kHz	Surface Mount	Positive	2	Step-Down	2
Analog Devices LTC1709EG-85#TRPBF	4 V	36 V	36-SSOP	99.5 %	Enable Power Good Soft Start	85 °C	-40 °C	0.209 " 5.3 mm	36-SSOP	Transistor Driver	Buck	310 kHz	140 kHz	Surface Mount	Positive	2	Step-Down	2

Pricing

Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly

Distributor	Package	Quantity	$

Digikey	Tube	1	$ 13.74

Description

General part information

LTC1709-85 Series

The LTC1709-85 is a 2-phase, VID programmable, synchronous step-down switching regulator controller that drives two all N-channel external power MOSFET stages in a fixed frequency architecture. The 2-phase controller drives its two output stages out of phase at frequencies up to 300kHz to minimize the RMS ripple currents in both input and output capacitors. The 2-phase technique effectively multiplies the fundamental frequency by two, improving transient response while operating each channel at an optimum frequency for efficiency. Thermal design is also simplified.An operating mode select pin (FCB) can be used to select among three modes including Burst Mode®operation for highest efficiency. An internal differential amplifier provides true remote sensing of the regulated supply’s positive and negative output terminals as required in high current applications.The RUN/SS pin provides soft-start and optional timed, short-circuit shutdown. Current foldback limits MOSFET dissipation during short-circuit conditions when the overcurrent latchoff is disabled. OPTI-LOOP compensation allows the transient response to be optimized for a wide range of output capacitors and ESR values.Vout RangeVRMLTC17091.3V to 3.5VVRM8.4LTC1709-70.925V to 2VMobileLTC1709-81.3V to 3.5VVRM8.4LTC1709-8.51.05V to 1.825VVRM8.5LTC1709-91.1V to 1.85VVRM9.0ApplicationsServer/Desktop ComputersInternet ServersLarge Memory ArraysDC Power Distribution Systems