LTC3828

PRODUCTION

Dual, 2-Phase Step-Down Controller with Tracking

Data Sheet Product Selection Table
Part Models
4
1ku List Price
Starting From $5.60
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Part Details

  • 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
LTC3828
Dual, 2-Phase Step-Down Controller with Tracking
High Efficiency Dual 2.5V/3.3V Step-Down Converter with Tracking Product Package 1 Product Package 2
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Documentation

Data Sheet 1

Reliability Data 1

User Guide 3

Design Note 1

Technical Articles 1

Data Sheet

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

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Hardware Ecosystem

Parts Product Life Cycle Description
Digital Power System Managers 1
LTC2974
RECOMMENDED FOR NEW DESIGNS 4-Channel PMBus Power System Manager Featuring Accurate Output Current Measurement
Dual-Supply Monitors 1
LTC2960
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Silicon Oscillators 1
LTC6908
Resistor Set SOT-23 Oscillator with Spread Spectrum Modulation
Surge Stopper, Overvoltage, and Overcurrent Protection 1
LT4363
RECOMMENDED FOR NEW DESIGNS High Voltage Surge Stopper with Current Limit
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Tools & Simulations

LTspice 1

Models for the following parts are available in LTspice:

  • LTC3828
LTspice

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

eval board
schematic 1
schematic 2
DC980A/B

LTC2970 Demo Board | Dual Power Supply Monitor and Margining Controller [Requires DC590]

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Product Details

The DC980A and DC980B are a demonstration system that showcases the LTC2970, a dual power supply monitor and margining controller with an I2C interface. The DC980A board contains the LTC2970 device and the DC980B board contains the LTC3828 dual DC/DC controller. The two boards interface to each other via a 20-pin connector. The DC980B board features the LTC3828 dual output, 2-phase synchronous buck regulator. The LTC2970’s two voltage-buffered, 8-bit IDACs allow highly accurate margining of the LTC3828’s output voltages. The IDACs can be configured to automatically servo the power supplies to a desired voltage using the ADC for feedback. The DC980B comes preconfigured with 3.3V and 5V power supply rail voltages.

eval board
schematic 3
DC884A

LTC3828EUH Demo Board | 2-Phase, Tracking, 5V ≤ VIN ≤ 12V; VOUT1 = 2V @ 17A, VOUT2 = 1.5V @ 17A

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Product Details

Demonstration circuit 884 is a high current density supply featuring the LTC3828EUH, a dual-output, 2-phase synchronous buck controller. The input voltage of the demo board is from 4.5V to 15V. The outputs are 2V @ 17A and 1.5V @ 17A.

eval board
schematic 4
DC802A

LTC3828EUH Demo Board | 2-Phase, Tracking, 7V ≤ VIN ≤ 21V; VOUT1 = 5V @ 5A, VOUT2 = 3.3V @ 5A

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Product Details

Demonstration circuit 802 features the LTC3828EUH, a dual-output, 2-phase synchronous buck controller. The input voltage range of the demo board is 7V to 21V. The outputs are 5V @ 5A and 3.3V @ 5A.
DC980A/B
LTC2970 Demo Board | Dual Power Supply Monitor and Margining Controller [Requires DC590]
DC980A - Schematic Figure 2. Connecting DC980A/DC980B Boards and the DC590 I2C/Serial Controller
DC884A
LTC3828EUH Demo Board | 2-Phase, Tracking, 5V ≤ VIN ≤ 12V; VOUT1 = 2V @ 17A, VOUT2 = 1.5V @ 17A
DC884A - Schematic
DC802A
LTC3828EUH Demo Board | 2-Phase, Tracking, 7V ≤ VIN ≤ 21V; VOUT1 = 5V @ 5A, VOUT2 = 3.3V @ 5A
DC802A - Schematic

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