LTC3828
PRODUCTIONDual, 2-Phase Step-Down Controller with Tracking
- Part Models
- 4
- 1ku List Price
- Starting From $7.09
Overview
- 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
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 dissipation during short-circuit conditions. Reverse current and current foldback functions are disabled during soft-start.
Applications
- Telecom Infrastructure
- ASIC Power Supply
- Industry Equipment
Documentation
Data Sheet 1
User Guide 3
Design Note 1
Technical Articles 1
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 |
|---|---|---|---|
| LTC3828EG#PBF | 28-Lead SSOP | ||
| LTC3828EG#TRPBF | 28-Lead SSOP | ||
| LTC3828EUH#PBF | 32-Lead QFN (5mm x 5mm x 0.75mm w/ EP) | ||
| LTC3828EUH#TRPBF | 32-Lead QFN (5mm x 5mm x 0.75mm w/ EP) |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Aug 6, 2022 - 22_0171 Laser Top Mark Conversion for SSOP Packages Assembled in PNG |
||
| LTC3828EG#PBF | PRODUCTION | |
| LTC3828EG#TRPBF | PRODUCTION | |
|
Jan 20, 2022 - 21_0269 Addition of Alternate Assembly Site ASE Taiwan for Select LFCSP Products |
||
| LTC3828EUH#PBF | PRODUCTION | |
| LTC3828EUH#TRPBF | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
Can't find the software or driver you need?
Request a Driver/SoftwareHardware Ecosystem
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| Hot Swap Controllers 1 | ||
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| Oscillators 1 | ||
| LTC6908 | Resistor Set SOT-23 Oscillator with Spread Spectrum Modulation | |
| Power System Management (PSM) & Sequencers 1 | ||
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Tools & Simulations
LTspice
Models for the following parts are available in LTspice:
- LTC3828
LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.
Evaluation Kits
LTC2970 Demo Board | Dual Power Supply Monitor and Margining Controller [Requires DC590]
Resources
Software
LTC3828EUH Demo Board | 2-Phase, Tracking, 5V ≤ VIN ≤ 12V; VOUT1 = 2V @ 17A, VOUT2 = 1.5V @ 17A
Resources
LTC3828EUH Demo Board | 2-Phase, Tracking, 7V ≤ VIN ≤ 21V; VOUT1 = 5V @ 5A, VOUT2 = 3.3V @ 5A
Resources
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