LTC1736
PRODUCTION5-Bit Adjustable High Efficiency Synchronous Step-Down Switching Regulator
- Part Models
- 4
- 1ku List Price
- Starting From $6.44
Overview
- Dual N-Channel MOSFET Synchronous Drive
- Synchronizable/Programmable Fixed Frequency
- Wide VIN Range: 3.5V to 36V Operation
- 5-Bit Digital-to-Analog VOUT Selection:
- 0.925V to 2.00V Range with 50mV/25mV Steps
- OPTI-LOOP™ Compensation Minimizes COUT
- ±1% Output Voltage Accuracy
- Power Good Output Voltage Monitor
- Output Overvoltage Crowbar Protection
- Internal Current Foldback
- Latched Short-Circuit Shutdown Timer with Defeat Option
- Forced Continuous Control Pin
- Optional Programmable Soft-Start
- Remote Output Voltage Sense
- Available in 24-Lead SSOP Package
The LTC1736 is a synchronous step-down switching regulator controller optimized for CPU power. The output voltage is programmed by a 5-bit digital-to-analog converter (DAC) that adjusts the output voltage from 0.925V to 2.00V according to Intel mobile VID specifications. The 0.8V reference is compatible with future microprocessor generations.
The operating frequency (synchronizable up to 500kHz) is set by an external capacitor allowing maximum flexibility in optimizing efficiency. The output voltage is monitored by a power good window comparator that indicates when the output is within 7.5% of its programmed value.
Protection features include: internal foldback current limiting, output overvoltage crowbar and optional short-circuit shutdown. Soft-start is provided by an external capacitor that can be used to properly sequence supplies. The operating current level is user-programmable via an external current sense resistor. Wide input supply range allows operation from 3.5V to 30V (36V maximum).
Pin defeatable Burst Mode™ operation provides high efficiency at low load currents. OPTI-LOOP compensation allows the transient response to be optimized over a wide range of output capacitance and ESR values.
Applications
- Notebook and Palmtop Computers, PDAs
- Power Supply for Mobile Pentium® II and Pentium III Processors
- Low Voltage Power Supplies
Documentation
Data Sheet 1
User Guide 2
Application Note 1
Design Note 7
Technical Articles 4
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 |
|---|---|---|---|
| LTC1736CG#PBF | 24-Lead SSOP | ||
| LTC1736CG#TRPBF | 24-Lead SSOP | ||
| LTC1736IG#PBF | 24-Lead SSOP | ||
| LTC1736IG#TRPBF | 24-Lead SSOP |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Aug 6, 2022 - 22_0171 Laser Top Mark Conversion for SSOP Packages Assembled in PNG |
||
| LTC1736CG#PBF | PRODUCTION | |
| LTC1736CG#TRPBF | PRODUCTION | |
| LTC1736IG#PBF | PRODUCTION | |
| LTC1736IG#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
| 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 |
Tools & Simulations
LTspice
Models for the following parts are available in LTspice:
- LTC1736
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
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