Datasheet LT1585-1.5, LT1585A-1.5 (Analog Devices)
| Manufacturer | Analog Devices |
| Description | Fixed 1.5V, 4.6A and 5A Low Dropout, Fast Response GTL+ Regulators |
| Pages / Page | 8 / 1 — FEATURES. DESCRIPTIO. Fast Transient Response. Guaranteed Dropout Voltage … |
| File Format / Size | PDF / 156 Kb |
| Document Language | English |
FEATURES. DESCRIPTIO. Fast Transient Response. Guaranteed Dropout Voltage at Multiple Currents. APPLICATIO S. TYPICAL APPLICATIO
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LT1585-1.5/LT1585A-1.5 Fixed 1.5V, 4.6A and 5A Low Dropout, Fast Response GTL+ Regulators
U FEATURES DESCRIPTIO
■
Fast Transient Response
The LT®1585-1.5/LT1585A-1.5 are low dropout, 3-termi- ■
Guaranteed Dropout Voltage at Multiple Currents
nal regulators with 4.6A and 5A output current capability ■ Load Regulation: 0.05% Typ respectively, and a fixed 1.5V output voltage. The designs ■ Trimmed Current Limit are optimized for low voltage applications where transient ■ On-Chip Thermal Limiting response and minimum input voltage are critical. Similar to the LT1084, they have lower dropout and faster transient
U
response. These improvements make them ideal for low
APPLICATIO S
voltage microprocessor applications, especially as the ■ GTL+ Power Supply regulator in an Intel processor GTL+ supply. ■ Low Voltage Logic Supplies Current limit is trimmed to ensure specified output current ■ Battery-Powered Circuitry and controlled short-circuit current. On-chip thermal lim- iting provides protection against any combination of over- load that creates excessive junction temperatures. The LT1585-1.5/LT1585A-1.5 are available in the through- hole 3-pin TO-220 power package and 3-pin plastic DD. , LTC and LT are registered trademarks of Linear Technology Corporation.
U TYPICAL APPLICATIO Intel Processor GTL+ Supply
VTT = 1.5V LT1585A-1.5 5A 3.3V VIN VOUT C7 TO GND C12 R1 R7 R8 R6 R3 1µF 75Ω R5 VREF 100Ω 100Ω 100Ω 100Ω VREF 75Ω + C1, C2 + C3 TO C6 100µF 100µF R2 C13 R4 C14 10V 10V 150 0.1µF 150 Ω Ω 0.1µF RX RX TX Q1 Q2 TX RX RX NOTE: LTC RECOMMENDS CENTRALLY LOCATING THE LT1585A-1.5 TO MINIMIZE TX Q3 VTT DISTRIBUTION DROPS AND USING • Q4 TX SEPARATE VREF GENERATORS AT EACH • BUS END • 1585-1.5 • TA01 142 TOTAL SIGNAL LINES 1
U FEATURES DESCRIPTIO
■
Fast Transient Response
The LT®1585-1.5/LT1585A-1.5 are low dropout, 3-termi- ■
Guaranteed Dropout Voltage at Multiple Currents
nal regulators with 4.6A and 5A output current capability ■ Load Regulation: 0.05% Typ respectively, and a fixed 1.5V output voltage. The designs ■ Trimmed Current Limit are optimized for low voltage applications where transient ■ On-Chip Thermal Limiting response and minimum input voltage are critical. Similar to the LT1084, they have lower dropout and faster transient
U
response. These improvements make them ideal for low
APPLICATIO S
voltage microprocessor applications, especially as the ■ GTL+ Power Supply regulator in an Intel processor GTL+ supply. ■ Low Voltage Logic Supplies Current limit is trimmed to ensure specified output current ■ Battery-Powered Circuitry and controlled short-circuit current. On-chip thermal lim- iting provides protection against any combination of over- load that creates excessive junction temperatures. The LT1585-1.5/LT1585A-1.5 are available in the through- hole 3-pin TO-220 power package and 3-pin plastic DD. , LTC and LT are registered trademarks of Linear Technology Corporation.
U TYPICAL APPLICATIO Intel Processor GTL+ Supply
VTT = 1.5V LT1585A-1.5 5A 3.3V VIN VOUT C7 TO GND C12 R1 R7 R8 R6 R3 1µF 75Ω R5 VREF 100Ω 100Ω 100Ω 100Ω VREF 75Ω + C1, C2 + C3 TO C6 100µF 100µF R2 C13 R4 C14 10V 10V 150 0.1µF 150 Ω Ω 0.1µF RX RX TX Q1 Q2 TX RX RX NOTE: LTC RECOMMENDS CENTRALLY LOCATING THE LT1585A-1.5 TO MINIMIZE TX Q3 VTT DISTRIBUTION DROPS AND USING • Q4 TX SEPARATE VREF GENERATORS AT EACH • BUS END • 1585-1.5 • TA01 142 TOTAL SIGNAL LINES 1
