(China (Mainland))
Product Summary
The LTC3828 is a dual high performance step-down switching regulator controller that drives all N-channel synchronous power MOSFET stages. A constant frequency current mode architecture allows for a phase-lockable frequency of up to 550kHz. The TRCKSS pin provides both soft-start and tracking functions. Multiple LTC3828s can be daisy-chained in applications requiring more than two voltages to be tracked.
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 and power good output indicator are compatible with a wide 4.5V to 28V (30V maximum) input supply range, encompassing all battery chemistries.
The RUN pins control their respective channels independently. The FCB/PLLIN pin selects among Burst Mode operation, skip-cycle mode and continuous current mode. Current foldback limits MOSFET dissipationduring short-circuit conditions. Reverse current and current foldback functions are disabled during soft-start.
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Features
Dual, 180° Phased Controllers Reduce Required Input Capacitance and Power Supply Induced Noise
Tracking for Both Outputs
Constant Frequency Current Mode Control
Wide VIN Range: 4.5V to 28V Operation
Power Good Output Voltage Indicator
Adjustable Soft-Start Current Ramping
Foldback Output Current Limiting- Disabled at Start-Up
No Reverse Current During Soft-Start Interval
Clock Output for 3-, 4-, 6-Phase Operation
Dual N-Channel MOSFET Synchronous Drive
±1% Output Voltage Accuracy
Phase-Lockable Fixed Frequency 260kHz to 550kHz
OPTI-LOOP? Compensation Minimizes COUT
Very Low Dropout Operation: 99% Duty Cycle
Output Overvoltage Protection
Small 28-Lead SSOP and 5mm × 5mm QFN Packages
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 LTC3828EUH#PBF |
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IC REG CTRLR BUCK PWM CM 32-QFN |
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LTC3025 |
Other |
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Data Sheet |
Negotiable |
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LTC3025EDC#TR |
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IC REG LDO ADJ .3A 6DFN |
Data Sheet |
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LTC3025EDC#TRM |
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IC REG LDO ADJ .3A 6DFN |
Data Sheet |
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LTC3025EDC#TRMPBF |
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IC REG LDO ADJ .3A 6DFN |
Data Sheet |
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LTC3025EDC#TRPBF |
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IC REG LDO ADJ .3A 6DFN |
Data Sheet |
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LTC3025EDC-1#TRMPBF |
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IC REG LDO ADJ .5A 6DFN |
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