DocumentationDatasheet
Spec Notice
Reliability Data
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Features
- Fast Transient Response
- Guaranteed Dropout Voltage at Multiple Currents
- Load Regulation: 0.05% Typ
- Trimmed Current Limit
- On-Chip Thermal Limiting
Typical Application
Description
The LT1587-1.5 is a low dropout 3-terminal regulator with a fixed 1.5V output voltage and 3A output current capability. The design is optimized for low voltage applications where transient response and minimum input voltage are critical. Similar to the LT1085, it has lower dropout and faster transient response. These improvements make it ideal for low voltage microprocessor applications, especially as the regulator in an Intel Pentium Pro processor GTL+ supply.
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 creates excessive junction temperatures.
The LT1587-1.5 is available in both the through-hole and surface mount versions of the industry standard 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)* |
|---|---|---|---|---|---|
| LT1587CM#PBF | DD PAK | 3 | C | $4.35 | $3.55 |
| LT1587CM#TRPBF | DD PAK | 3 | C | $3.68 | |
| LT1587CM-1.5#PBF | DD PAK | 3 | C | $4.35 | $3.55 |
| LT1587CM-1.5#TRPBF | DD PAK | 3 | C | $3.68 | |
| LT1587CM-3.3#PBF | DD PAK | 3 | C | $4.33 | $3.55 |
| LT1587CM-3.3#TRPBF | DD PAK | 3 | C | $3.68 | |
| LT1587CM-3.45#PBF | DD PAK | 3 | C | $4.33 | $3.55 |
| LT1587CM-3.45#TRPBF | DD PAK | 3 | C | $3.68 | |
| LT1587CM-3.6#PBF | DD PAK | 3 | C | $4.33 | $3.55 |
| LT1587CM-3.6#TRPBF | DD PAK | 3 | C | $3.68 | |
| LT1587CT#PBF | TO-220 | 3 | C | $3.92 | $3.20 |
| LT1587CT-1.5#PBF | TO-220 | 3 | C | $3.90 | $3.20 |
| LT1587CT-3.3#PBF | TO-220 | 3 | C | $3.92 | $3.20 |
| LT1587CT-3.45#PBF | TO-220 | 3 | C | $3.92 | $3.20 |
| LT1587CT-3.6#PBF | TO-220 | 3 | C | $3.92 | $3.20 |
| LT1587CM | DD PAK | 3 | C | $8.70 | $7.10 |
| LT1587CM#TR | DD PAK | 3 | C | $7.36 | |
| LT1587CM-1.5 | DD PAK | 3 | C | $8.70 | $7.10 |
| LT1587CM-1.5#TR | DD PAK | 3 | C | $7.36 | |
| LT1587CM-3.3 | DD PAK | 3 | C | $8.66 | $7.10 |
| LT1587CM-3.3#TR | DD PAK | 3 | C | $7.36 | |
| LT1587CM-3.45 | DD PAK | 3 | C | $8.66 | $7.10 |
| LT1587CM-3.45#TR | DD PAK | 3 | C | $7.36 | |
| LT1587CM-3.6 | DD PAK | 3 | C | $8.66 | $7.10 |
| LT1587CM-3.6#TR | DD PAK | 3 | C | $7.36 | |
| LT1587CT | TO-220 | 3 | C | $7.84 | $6.40 |
| LT1587CT-1.5 | TO-220 | 3 | C | $7.80 | $6.40 |
| LT1587CT-3.3 | TO-220 | 3 | C | $7.84 | $6.40 |
| LT1587CT-3.45 | TO-220 | 3 | C | $7.84 | $6.40 |
| LT1587CT-3.6 | TO-220 | 3 | C | $7.84 | $6.40 |
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.