LT3988
PRODUCTIONDual 60V Monolithic 1A Step-Down Switching Regulator
- Part Models
- 6
- 1ku List Price
- Starting From $5.54
Overview
- Wide Input Range:
- Operation from 4.1V to 60V
- Overvoltage Lockout Protects Circuit Through 80V Transients
- Two 1A Output Switching Regulators with Internal Power Switches
- Short Circuit Robust
- Adjustable 250kHz to 2.5MHz Switching Frequency, Synchronizable Over the Full Range
- Integrated Boost Diodes
- Integrated Loop Compensation
- Anti-Phase Switching Reduces Ripple
- Low Shutdown IQ (<2μA)
- Uses Small Inductors and Ceramic Capacitors
- Thermally Enhanced, 16-Lead MSOP Package
The LT3988 is a dual, current mode, step-down, DC/DC converter that accepts two input voltages up to 60V (80V transient), which may be driven from separate supplies or can be cascaded. High efficiency switches are included on the die along with internal boost diodes and loop compensation. Both converters are capable of generating 1A outputs, are synchronized to a single oscillator programmable up to 2.5MHz, and run with opposite phases, reducing input ripple current.
The switching frequency is set with a single resistor yielding a range of 250kHz to 2.5MHz, or a clock signal can be applied to the SYNC pin. The LT3988’s high switching frequency allows the use of small inductors and capacitors, resulting in a very small dual output supply. The constant switching frequency, combined with low impedance ceramic capacitors, results in low, predictable output ripple. A current mode PWM architecture provides fast transient response with cycle-by-cycle current limiting. Diode current sense and thermal shutdown provide additional protection.
The LT3988 is available in a 16-lead MSOP package with an exposed pad for low thermal resistance.
Applications
- Commercial Vehicle Battery Regulation
- Industrial Supplies
- Distributed Supply Regulation
Documentation
Data Sheet 1
User Guide 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 |
|---|---|---|---|
| LT3988EMSE#PBF | 16-Lead MSOP w/ EP | ||
| LT3988EMSE#TRPBF | 16-Lead MSOP w/ EP | ||
| LT3988HMSE#PBF | 16-Lead MSOP w/ EP | ||
| LT3988HMSE#TRPBF | 16-Lead MSOP w/ EP | ||
| LT3988IMSE#PBF | 16-Lead MSOP w/ EP | ||
| LT3988IMSE#TRPBF | 16-Lead MSOP w/ EP |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Oct 11, 2022 - 22_0244 Epoxy Change from Henkel 8290 to 8290A for MSOP Package |
||
| LT3988EMSE#PBF | PRODUCTION | |
| LT3988EMSE#TRPBF | PRODUCTION | |
| LT3988HMSE#PBF | PRODUCTION | |
| LT3988HMSE#TRPBF | PRODUCTION | |
| LT3988IMSE#PBF | PRODUCTION | |
| LT3988IMSE#TRPBF | PRODUCTION | |
|
Feb 4, 2020 - 20_0132 Laser Top Mark for 16-Lead MSOP Packages Assembled in ADPG and UTAC |
||
| LT3988EMSE#PBF | PRODUCTION | |
| LT3988EMSE#TRPBF | PRODUCTION | |
| LT3988HMSE#PBF | PRODUCTION | |
| LT3988HMSE#TRPBF | PRODUCTION | |
| LT3988IMSE#PBF | PRODUCTION | |
| LT3988IMSE#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 | ||
| LT4363 | RECOMMENDED FOR NEW DESIGNS | High Voltage Surge Stopper with Current Limit |
| Oscillators 1 | ||
| LTC6908 | Resistor Set SOT-23 Oscillator with Spread Spectrum Modulation | |
| Power System Management (PSM) & Sequencers 1 | ||
| LTC2974 | RECOMMENDED FOR NEW DESIGNS | 4-Channel PMBus Power System Manager Featuring Accurate Output Current Measurement |
| Switching Regulators & Controllers 1 | ||
| LTC3880 | RECOMMENDED FOR NEW DESIGNS | Dual Output PolyPhase Step-Down DC/DC Controller with Digital Power System Management |
Tools & Simulations
LTspice 1
Models for the following parts are available in LTspice:
- LT3988
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
LT3988EMSE Demo Board I 7V ≤ VIN ≤60V, VOUT1 = 5V @ 1A, VOUT2 = 3.3V @ 1A
Resources
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