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Datasheet Linear Technology LTC3835

ManufacturerLinear Technology
SeriesLTC3835

Low IQ Synchronous Step-Down Controller

Datasheets

  • Download » Datasheet PDF, 423 Kb, Revision: E, File uploaded: Sep 23, 2017
    LTC3835 - Low IQ Synchronous Step-Down Controller
    Docket ↓
    LTC3835
    Low IQ Synchronous
    Step-Down Controller
    DESCRIPTION FEATURES n n n n n n n n n n n n n n n n n Wide Output Voltage Range: 0.8V ≤ VOUT ≤ 10V
    Low Operating Quiescent Current: 80µA
    OPTI-LOOP® Compensation Minimizes COUT
    ±1% Output Voltage Accuracy
    Wide VIN Range: 4V to 36V Operation
    Phase-Lockable Fixed Frequency 140kHz to 650kHz
    Dual N-Channel MOSFET Synchronous Drive
    Very Low Dropout Operation: 99% Duty Cycle
    Adjustable Output Voltage Soft-Start or Tracking
    Output Current Foldback Limiting
    Power Good Output Voltage Monitor
    Clock Output for PolyPhase® Applications
    Output Overvoltage Protection
    Low Shutdown IQ: 10µA
    Internal LDO Powers Gate Drive from VIN or VOUT
    Selectable Continuous, Pulse-Skipping or
    Burst Mode® Operation at Light Loads
    Small 20-Lead TSSOP or 4mm × 5mm QFN Package n n n The 80µA no-load quiescent current extends operating
    life in battery powered systems. OPTI-LOOP compensation allows the transient response to be optimized over
    a wide range of output capacitance and ESR values. The ...

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Packaging

Parametrics

LTC3835EFE#PBFLTC3835EFE#TRPBFLTC3835EUFD#PBFLTC3835EUFD#TRPBFLTC3835IFE#PBFLTC3835IFE#TRPBFLTC3835IUFD#PBFLTC3835IUFD#TRPBF
ArchitectureConstant Frequency Current ModeConstant Frequency Current ModeConstant Frequency Current ModeConstant Frequency Current ModeConstant Frequency Current ModeConstant Frequency Current ModeConstant Frequency Current ModeConstant Frequency Current Mode
Demo BoardsDC967BDC967BDC967BDC967BDC967BDC967BDC967BDC967B
Design ToolsLTspice FileLTspice FileLTspice FileLTspice FileLTspice FileLTspice FileLTspice FileLTspice File
Export Controlnononononononono
FeaturesBurst Mode, Tracking, External Synchronization, PLL, Power GoodBurst Mode, Tracking, External Synchronization, PLL, Power GoodBurst Mode, Tracking, External Synchronization, PLL, Power GoodBurst Mode, Tracking, External Synchronization, PLL, Power GoodBurst Mode, Tracking, External Synchronization, PLL, Power GoodBurst Mode, Tracking, External Synchronization, PLL, Power GoodBurst Mode, Tracking, External Synchronization, PLL, Power GoodBurst Mode, Tracking, External Synchronization, PLL, Power Good
Frequency, kHz650650650650650650650650
Frequency Sync Range140kHz - 650kHz140kHz - 650kHz140kHz - 650kHz140kHz - 650kHz140kHz - 650kHz140kHz - 650kHz140kHz - 650kHz140kHz - 650kHz
Integrated Inductornononononononono
Ishutdown, A1010101010101010
Isupply, mA0.080.080.080.080.080.080.080.08
Max Phases11111111
Monolithicnononononononono
Number of Outputs11111111
Operating Temperature Range, °C0 to 850 to 850 to 850 to 85-40 to 85-40 to 85-40 to 85-40 to 85
Output Current, A2020202020202020
Polyphasenononononononono
Sense ResistorRsenseRsenseRsenseRsenseRsenseRsenseRsenseRsense
Switch Current, A2020202020202020
Synchronousyesyesyesyesyesyesyesyes
TopologyBuckBuckBuckBuckBuckBuckBuckBuck
Vin Max, V3636363636363636
Vin Min, V44444444
Vout Max, V1010101010101010
Vout Maximum10V10V10V10V10V10V10V10V
Vout Min, V0.80.80.80.80.80.80.80.8
Vref Accuracy Over Temp, %11111111

Eco Plan

Design Notes

  • Download » Design Notes - DN1014 PDF, 103 Kb, File published: Dec 18, 2006
    80µA Quiescent Current Synchronous Step-Down Controller Extends Battery Life in Automotive Applications
    Docket ↓
    advertisement 80µA Quiescent Current Synchronous Step-Down Controller Extends Battery Life in Automotive Applications – Design Note 1014
    Julian Zhu Introduction
    Battery powered applications that have a significant
    amount of time in standby mode, require electrical circuits
    to operate with a low quiescent current to preserve battery life. The LTC3835 synchronous step-down controller
    is an excellent solution with its ultralow quiescent current (80µA). Other features make it uniquely qualified to
    satisfy the needs of automotive applications. A wide 4V
    to 36V input voltage range protects the supply against
    high input voltage transients and is compatible with low
    voltage cold crank conditions. The constant frequency
    current-mode architecture with high-side inductor current sensing provides excellent line and load regulation
    and reliable current limiting and sharing. The 0.8V to
    10V output voltage range provides flexibility for a variety
    of applications. Solution size is small due to the 650kHz
    switching frequency, which reduces external component
    sizes, and the integrated synchronous FET driver, which
    keeps component count low. Furthermore, the LTC3835
    provides high efficiency over a wide load range up to 20A.
    Other important features include:
    CLKOUT The output voltage can be ramped during start-up with
    an adjustable soft-start or it can track an external ramp
    signal. The controller can be synchronized to an external clock
    via a phase-locked loop. The CLKOUT pin and current mode control allow interleaved operation of multiple parallel controllers for ...

Moldel Line

Series: LTC3835 (8)

Manufacturer's Classification

  • Power Management > Switching Regulator > Step-Down (Buck) Regulators > Micropower Buck Regulators | External Power Switch Buck Controllers

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