Overview
Features and Benefits
- Wide Output Voltage Range: 0.8V ≤ VOUT ≤ 10V
- Low Operating IQ: 80µA (One Channel On)
- Out-of-Phase Controllers Reduce Required Input Capacitance and Power Supply Induced Noise
- OPTI-LOOP® Compensation Minimizes COUT
- ±1% Output Voltage Accuracy
- Wide VIN Range: 4V to 36V Operation
- Phase-Lockable Fixed Frequency 140kHz to 650kHz
- Selectable Continuous, Pulse-Skipping or Low Ripple Burst Mode® Operation at Light Loads
- 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
- Output Overvoltage Protection
- Low Shutdown IQ: 8µA
- Internal LDO Powers Gate Drive from VIN or VOUT
- Small 5mm × 5mm QFN Package
- AEC-Q100 Qualified for Automotive Applications
Product Details
The LTC3827 is a high performance dual step-down switching regulator controller that drives all N-channel synchronous power MOSFET stages. A constant frequency current mode architecture allows a phase-lockable frequency of up to 650kHz. Power loss and noise due to the ESR of the input capacitor ESR are minimized by operating the two controller output stages out of phase.
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 LTC3827 features a precision 0.8V reference and a power good output indicator. A wide 4V to 36V input supply range encompasses all battery chemistries.
Independent TRACK/SS pins for each controller ramp the output voltage during start-up. Current foldback limits MOSFET heat dissipation during short-circuit conditions.
The PLLIN/MODE pin selects among Burst Mode operation, pulse skipping mode, or continuous inductor current mode at light loads. For a leaded package version (28-lead SSOP), see the LTC3827-1 datasheet.
| PGOOD | PolyPhase | Defeatable Current Foldback | Package | |
| LTC3827 | 2 | Yes | Yes | QFN-32 |
| LTC3827-1 | 1 | No | No | SSOP-28 |
APPLICATIONS
- Automotive Systems
- Battery-Operated Digital Devices
- Distributed DC Power Systems
Product Lifecycle
Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Documentation & Resources
Tools & Simulations
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.
Models for the following parts are available in LTspice:
LTC3827
LTC3827-1
Product Recommendations
LTC3827 Companion Parts
Design Resources
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 Number | Material Declaration | Reliability Data | Pin/Package Drawing | CAD Symbols, Footprints & 3D Models |
|---|---|---|---|---|
| LTC3827EUH#PBF | Material Declaration | Reliability Data | 32-Lead QFN (5mm x 5mm x 0.75mm w/ EP) | |
| LTC3827EUH#TRPBF | Material Declaration | Reliability Data | 32-Lead QFN (5mm x 5mm x 0.75mm w/ EP) | |
| LTC3827IUH#PBF | Material Declaration | Reliability Data | 32-Lead QFN (5mm x 5mm x 0.75mm w/ EP) | |
| LTC3827IUH#TRPBF | Material Declaration | Reliability Data | 32-Lead QFN (5mm x 5mm x 0.75mm w/ EP) | |
| LTC3827IUH#WPBF | Material Declaration | Reliability Data | 32-Lead QFN (5mm x 5mm x 0.75mm w/ EP) | |
| LTC3827IUH#WTRPBF | Material Declaration | Reliability Data | 32-Lead QFN (5mm x 5mm x 0.75mm w/ EP) | |
| Wafer Fabrication Data | R384 Reliability Data |
Support & Discussions
Sample & Buy
Ordering FAQs
See our Ordering FAQs for answers to questions about online orders, payment options and more.
Buy Now Pricing
(**) Displayed Buy Now Price and Price Range is based on small quantity orders.
List Pricing
(*)The 1Ku list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
Lead Times
Please see the latest communication from our CCO regarding lead times.
Sampling
Selecting the Sample button above will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact SampleSupport@analog.com with any questions regarding this Sample Site.