LTC3727LX-1
PRODUCTIONHigh Efficiency, 2-Phase Synchronous Step-Down Switching Regulator
- Part Models
- 4
- 1ku List Price
- Starting From $6.64
Overview
- Wide Output Voltage Range: 0.8V ≤ VOUT ≤ 14V
- Out-of-Phase Controllers Reduce Required Input Capacitance and Power Supply Induced Noise
- OPTI-LOOP® Compensation Minimizes COUT
- ±1.5% Output Voltage Accuracy
- Power Good Output Voltage Monitor
- Phase-Lockable Fixed Frequency 250kHz to 550kHz
- Dual N-Channel MOSFET Synchronous Drive
- Wide VIN Range: 4V to 32V Operation
- Very Low Dropout Operation: 99% Duty Cycle
- Adjustable Soft-Start Current Ramping
- Foldback Output Current Limiting
- Output Overvoltage Protection
- Low Shutdown IQ: 20µA
- Selectable Constant-Frequency or Burst Mode® Operation
- Small 28-Lead SSOP and 5mm × 5mm QFN Packages
The LTC3727LX-1 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 phase-lockable frequency of up to 550kHz. Power loss and noise due to the ESR of the input capacitors are minimized by operating the two controller output stages out of phase.
OPTI-LOOP compensation allows the transient response to be optimized over a wide range of output capacitance and ESR values. There is a precision 0.8V reference and a power good output indicator. A wide 4V to 28V (32V maximum) input supply range encompasses all battery chemistries.
| VIN Range | VREF Accuracy Over Temp | Latch-Off | Min On-Time | |
| LTC3727 | 4V - 36V | ±1% | No | 180ns |
| LTC3727-1 | 4V - 36V | ±1% | Yes | 180ns |
| LTC3727A-1 | 4V - 36V | ±1% | No | 120ns |
| LTC3727LX-1 | 4V - 32V | ±1.5% | No | 120ns |
Applications
- Telecom Systems
- Automotive Systems
- Distributed DC Power Systems
Documentation
Data Sheet 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 |
|---|---|---|---|
| LTC3727LXEG-1#PBF | 28-Lead SSOP | ||
| LTC3727LXEG-1#TRPBF | 28-Lead SSOP | ||
| LTC3727LXEUH-1#PBF | 32-Lead QFN (5mm x 5mm x 0.75mm w/ EP) | ||
| LTC3727LXEUH-1#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 |
||
| LTC3727LXEG-1#PBF | PRODUCTION | |
| LTC3727LXEG-1#TRPBF | PRODUCTION | |
|
Jan 20, 2022 - 21_0269 Addition of Alternate Assembly Site ASE Taiwan for Select LFCSP Products |
||
| LTC3727LXEUH-1#PBF | PRODUCTION | |
| LTC3727LXEUH-1#TRPBF | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
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Request a Driver/SoftwareHardware Ecosystem
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| Hot Swap Controllers 1 | ||
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| Oscillators 1 | ||
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Tools & Simulations
LTspice
Models for the following parts are available in LTspice:
- LTC3727
- LTC3727-1
- LTC3727A-1
- LTC3727LX-1
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.
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