Datasheet
Application Note
Design Note
- DN122 - Dual Regulators Power Pentium® Processor or Upgrade CPU
- DN87 - Fast Regulator Paces High Performance Processors
- DN90 - High Efficiency Power Sources for Pentium TM Processors
- DN91 - 5V to 3.3V Circuit Collection
Reliability Data
cad_symbol
ltspice
Features
- Fast Transient Response
- Guaranteed Dropout Voltage at Multiple Currents
- Load Regulation: 0.05% Typ
- Trimmed Current Limit
- On-Chip Thermal Limiting
- Standard 3-Pin Power Package
Typical Application
Description
The LT1584/LT1585/LT1587 are low dropout three terminal regulators with 7A, 4.6A and 3A output current capability, respectively. Design has been optimized for low voltage applications where transient response and minimum input voltage are critical. Similar to the LT1083/4/5family, it has lower dropout voltage and faster transient response. These improvements make it ideal for low voltage microprocessor applications requiring a regulated2.5V to 3.6V output with an input supply below 7V.
Current limit is trimmed to ensure specified output current and controlled short-circuit current. On-chip thermal limiting provides protection against any combination of overload that would create excessive junction temperatures.
The LT1585/LT1587 are available in both the through-hole and surface mount versions of the industry standard 3-pin TO-220 power package. The LT1584 is available in the through-hole 3-pin TO-220 power package.
| Output Current | Output Voltage Options | |
| LT1584, -3.3, -3.38, -3.45, -3.6 | 7A | Adj, 3.3V, 3.38V, 3.45V, 3.6V |
| LT1585, -3.3, -3.38, -3.45, -3.6 | 4.6A | Adj, 3.3V, 3.38V, 3.45V, 3.6V |
| LT1585A, LT1585A-3.3 | 5A | Adj, 3.3V |
| LT1585-1.5, LT1585A-1.5 | 4.6A / 5A | Fixed 1.5V |
| LT1587, -3.3, -3.45, -3.6 | 3A | Adj, 3.3V, 3.45V, 3.6V |
| LT1587-1.5 | 3A | Fixed 1.5V |
DDPAK-3,TO-220
Package Variations and Pricing
| Part Number | Package | Pins | Temp | Price (1-99) |
Price (1k)* |
|---|---|---|---|---|---|
| LT1585ACM-1.5#PBF | DD PAK | 3 | C | $5.40 | $4.45 |
| LT1585ACM-1.5#TRPBF | DD PAK | 3 | C | $4.57 | |
| LT1585ACT#PBF | TO-220 | 3 | C | $5.00 | $4.10 |
| LT1585ACT-1.5#PBF | TO-220 | 3 | C | $5.00 | $4.10 |
| LT1585ACT-3.3#PBF | TO-220 | 3 | C | $5.00 | $4.10 |
| LT1585CM#PBF | DD PAK | 3 | C | $5.15 | $4.20 |
| LT1585CM#TRPBF | DD PAK | 3 | C | $4.33 | |
| LT1585CM-1.5#PBF | DD PAK | 3 | C | $5.15 | $4.20 |
| LT1585CM-1.5#TRPBF | DD PAK | 3 | C | $4.33 | |
| LT1585CM-3.3#PBF | DD PAK | 3 | C | $5.15 | $4.20 |
| LT1585CM-3.3#TRPBF | DD PAK | 3 | C | $4.33 | |
| LT1585CM-3.38#PBF | DD PAK | 3 | C | $5.15 | $4.20 |
| LT1585CM-3.45#PBF | DD PAK | 3 | C | $5.15 | $4.20 |
| LT1585CM-3.45#TRPBF | DD PAK | 3 | C | $4.33 | |
| LT1585CM-3.6#PBF | DD PAK | 3 | C | $5.15 | $4.20 |
| LT1585CT#PBF | TO-220 | 3 | C | $4.75 | $3.85 |
| LT1585CT-1.5#PBF | TO-220 | 3 | C | $4.75 | $3.85 |
| LT1585CT-3.3#PBF | TO-220 | 3 | C | $4.75 | $3.85 |
| LT1585CT-3.38#PBF | TO-220 | 3 | C | $4.75 | $3.85 |
| LT1585CT-3.45#PBF | TO-220 | 3 | C | $4.75 | $3.85 |
| LT1585CT-3.6#PBF | TO-220 | 3 | C | $4.75 | $3.85 |
| LT1585ACM-1.5 | DD PAK | 3 | C | $10.80 | $8.90 |
| LT1585ACM-1.5#TR | DD PAK | 3 | C | $9.14 | |
| LT1585ACT | TO-220 | 3 | C | $10.00 | $8.20 |
| LT1585ACT-1.5 | TO-220 | 3 | C | $10.00 | $8.20 |
| LT1585ACT-3.3 | TO-220 | 3 | C | $10.00 | $8.20 |
| LT1585CM | DD PAK | 3 | C | $10.30 | $8.40 |
| LT1585CM#TR | DD PAK | 3 | C | $8.66 | |
| LT1585CM-1.5 | DD PAK | 3 | C | $10.30 | $8.40 |
| LT1585CM-1.5#TR | DD PAK | 3 | C | $8.66 | |
| LT1585CM-3.3 | DD PAK | 3 | C | $10.30 | $8.40 |
| LT1585CM-3.3#TR | DD PAK | 3 | C | $8.66 | |
| LT1585CM-3.38 | DD PAK | 3 | C | $10.30 | $8.40 |
| LT1585CM-3.45 | DD PAK | 3 | C | $10.30 | $8.40 |
| LT1585CM-3.45#TR | DD PAK | 3 | C | $8.66 | |
| LT1585CM-3.6 | DD PAK | 3 | C | $10.30 | $8.40 |
| LT1585CT | TO-220 | 3 | C | $9.50 | $7.70 |
| LT1585CT-1.5 | TO-220 | 3 | C | $9.50 | $7.70 |
| LT1585CT-3.3 | TO-220 | 3 | C | $9.50 | $7.70 |
| LT1585CT-3.38 | TO-220 | 3 | C | $9.50 | $7.70 |
| LT1585CT-3.45 | TO-220 | 3 | C | $9.50 | $7.70 |
| LT1585CT-3.6 | TO-220 | 3 | C | $9.50 | $7.70 |
Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.
| Part Number | Description | Price | Documentation |
|---|---|---|---|
| DC065A-B | LT1585C | PENTIUM VALIDATOR MOTHERBOARD 3.3V @ 4.6A | Contact Factory |