LTC1708-PG
PRODUCTIONDual Adjustable 5-Bit VID High Efficiency, 2-Phase Current Mode Synchronous Buck DC/DC Regulator Controller
- Part Models
- 2
- 1ku List Price
- Starting From $7.33
Overview
- Out-of-Phase Controllers Reduce Input Capacitance
and Power Supply Induced Noise - OPTI-LOOP® Compensation Minimizes COUT
- Power Good Output Monitors Both Outputs
- 5-Bit Mobile VID Control, VOUT: 0.9V to 2.0V
- Dual N-Channel MOSFET Synchronous Drive
- ±1% Output Voltage Accuracy
- DC Programmed Fixed Frequency 150kHz to 300kHz
- Wide VIN Range: 3.5V to 36V Operation
- Very Low Dropout Operation: 99% Duty Cycle
- Adjustable Soft-Start Current Ramping
- Foldback Output Current Limiting
- Latched Short-Circuit Shutdown with Defeat Option
- Output Overvoltage Protection
- Remote Output Voltage Sense
- Low Shutdown Current: 20µA
- 5V and 3.3V Standby Regulators
- Selectable Constant Frequency, Burst Mode® and
Continuous Operation
The LTC1708 is a dual adjustable 5-bit VID programmable step-down switching regulator controller that drives all N-Channel power MOSFET stages. A constant frequency current mode architecture allows adjustment of the frequency up to 300kHz. Power loss and noise due to the ESR of the input capacitance are minimized by operating the two main 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. The precision 0.8V reference is compatible with future microprocessor generations, and a wide 3.5V to 30V (36V maximum) input supply range that encompasses all battery chemistries. A power good output indicates when the output voltages are within 7.5% of their programmed value.
A RUN/SS pin for each controller provides both soft-start and an optional timed, short-circuit shutdown. Other protection features include: internal foldback current limiting and an output overvoltage crowbar. The forced continuous control pin (FCB) can be used to inhibit BurstMode operation or to regulate a third, flyback output.
Applications
- Notebook and Palmtop Computers, PDAs
- Portable Instruments
Documentation
Data Sheet 1
User Guide 1
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 |
|---|---|---|---|
| LTC1708EG-PG#PBF | 36-Lead SSOP | ||
| LTC1708EG-PG#TRPBF | 36-Lead SSOP |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Nov 18, 2019 - 19_0266 Laser Top Mark for SSOP36/44/48 Packages assembled in ADPG and UTAC |
||
| LTC1708EG-PG#PBF | PRODUCTION | |
| LTC1708EG-PG#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
| Parts | Product Life Cycle | Description |
|---|---|---|
| Circuit Monitors 1 | ||
| LTC2960 | RECOMMENDED FOR NEW DESIGNS | 36V Nano-Current Two-Input Voltage Monitor |
| Hot Swap Controllers 1 | ||
| LT4363 | RECOMMENDED FOR NEW DESIGNS | High Voltage Surge Stopper with Current Limit |
| 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 |
Evaluation Kits
LTC1708EG-PG | Low Cost VRM for Mobile Computing, 7.5V to 24VIN, 1.3V to 1.6VOUT @ 15A, 1.5VOUT @ 2.5A, and 2.5VOUT @ 0.15A
Resources
Latest Discussions
No discussions on LTC1708-PG yet. Have something to say?
Start a Discussion on EngineerZone®