Datasheet LT1580, LT1580-2.5 (Analog Devices)
| Manufacturer | Analog Devices |
| Description | 7A, Very Low Dropout Regulator |
| Pages / Page | 16 / 1 — FEATURES. DESCRIPTION. Low Dropout, 540mV at 7A Output Current. Fast … |
| File Format / Size | PDF / 245 Kb |
| Document Language | English |
FEATURES. DESCRIPTION. Low Dropout, 540mV at 7A Output Current. Fast Transient Response. Remote Sense. APPLICATIONS
Model Line for this Datasheet
- LT1580CQ#PBF LT1580CQ#PBF LT1580CQ#TRPBF LT1580CQ#TRPBF LT1580CR-2.5#PBF LT1580CR-2.5#PBF LT1580CR-2.5#TRPBF LT1580CR-2.5#TRPBF LT1580CT#06PBF LT1580CT#06PBF LT1580CT#PBF LT1580CT#PBF LT1580CT7-2.5#PBF LT1580CT7-2.5#PBF LT1580IQ#PBF LT1580IQ#PBF LT1580IQ#TRPBF LT1580IQ#TRPBF LT1580IR-2.5#PBF LT1580IR-2.5#PBF LT1580IR-2.5#TRPBF LT1580IR-2.5#TRPBF LT1580IT#06PBF LT1580IT#06PBF LT1580IT#PBF LT1580IT#PBF LT1580IT7-2.5#06PBF LT1580IT7-2.5#06PBF LT1580IT7-2.5#PBF LT1580IT7-2.5#PBF
Text Version of Document
LT1580/LT1580-2.5 7A, Very Low Dropout Regulator
U FEATURES DESCRIPTION
■
Low Dropout, 540mV at 7A Output Current
The LT ®1580 is a 7A low dropout regulator designed to ■
Fast Transient Response
power the new generation of microprocessors. The drop- ■
Remote Sense
out voltage of this device is 100mV at light loads rising to ■ 1mV Load Regulation just 540mV at 7A. To achieve this dropout, a second low ■ Fixed 2.5V Output and Adjustable Output current input voltage 1V greater than the output voltage, is ■ No Supply Sequencing Problems in required. The device can also be used as a single supply Dual Supply Mode device where dropout is comparable to an LT1584. Several other new features have been added to the LT1580.
U APPLICATIONS
A remote SENSE pin is brought out. This feature virtually eliminates output voltage variations due to load changes. ■ Microprocessor Supplies Typical load regulation, measured at the SENSE pin, for a ■ Post Regulators for Switching Supplies load current step of 100mA to 7A is less than 1mV. ■ High Current Regulators ■ The LT1580 has fast transient response, equal to the 5V to 3.XXV for Pentium® Processors Operating LT1584. On fixed voltage devices, the ADJ pin is brought at 90MHz to 166MHz and Beyond ■ out. A small capacitor on the ADJ pin further improves 3.3V to 2.9V for Portable Pentium Processor ■ transient response. PowerPCTM Series Power Supplies This device is ideal for generating processor supplies of 2V to 3V on motherboards where both 5V and 3.3V supplies are available. , LTC and LT are registered trademarks of Linear Technology Corporation. Pentium is a registered trademark of Intel Corporation. PowerPC is a trademark of IBM Corporation.
U TYPICAL APPLICATION Dropout Voltage — Minimum Power Voltage 2.5V Microprocessor Supply
1.0 INDICATES GUARANTEED TEST POINTS 0 2.5V/7A °C ≤ TJ ≤ 125°C 3.3V V V POWER OUT 7A + 330µF + 100µF TANT DATA SHEET LIMIT OS-CON AVX TPS LT1580-2.5 × 7 0.5 T 5V J = 125°C VCONTROL SENSE 0.2A T + GND ADJ J = 25°C 10µF TANT MINIMUM POWER VOLTAGE (V) 0.1µF 1580 TA01 0 0 1 2 3 4 5 6 7 OUTPUT CURRENT (A) 1580 G03 1
U FEATURES DESCRIPTION
■
Low Dropout, 540mV at 7A Output Current
The LT ®1580 is a 7A low dropout regulator designed to ■
Fast Transient Response
power the new generation of microprocessors. The drop- ■
Remote Sense
out voltage of this device is 100mV at light loads rising to ■ 1mV Load Regulation just 540mV at 7A. To achieve this dropout, a second low ■ Fixed 2.5V Output and Adjustable Output current input voltage 1V greater than the output voltage, is ■ No Supply Sequencing Problems in required. The device can also be used as a single supply Dual Supply Mode device where dropout is comparable to an LT1584. Several other new features have been added to the LT1580.
U APPLICATIONS
A remote SENSE pin is brought out. This feature virtually eliminates output voltage variations due to load changes. ■ Microprocessor Supplies Typical load regulation, measured at the SENSE pin, for a ■ Post Regulators for Switching Supplies load current step of 100mA to 7A is less than 1mV. ■ High Current Regulators ■ The LT1580 has fast transient response, equal to the 5V to 3.XXV for Pentium® Processors Operating LT1584. On fixed voltage devices, the ADJ pin is brought at 90MHz to 166MHz and Beyond ■ out. A small capacitor on the ADJ pin further improves 3.3V to 2.9V for Portable Pentium Processor ■ transient response. PowerPCTM Series Power Supplies This device is ideal for generating processor supplies of 2V to 3V on motherboards where both 5V and 3.3V supplies are available. , LTC and LT are registered trademarks of Linear Technology Corporation. Pentium is a registered trademark of Intel Corporation. PowerPC is a trademark of IBM Corporation.
U TYPICAL APPLICATION Dropout Voltage — Minimum Power Voltage 2.5V Microprocessor Supply
1.0 INDICATES GUARANTEED TEST POINTS 0 2.5V/7A °C ≤ TJ ≤ 125°C 3.3V V V POWER OUT 7A + 330µF + 100µF TANT DATA SHEET LIMIT OS-CON AVX TPS LT1580-2.5 × 7 0.5 T 5V J = 125°C VCONTROL SENSE 0.2A T + GND ADJ J = 25°C 10µF TANT MINIMUM POWER VOLTAGE (V) 0.1µF 1580 TA01 0 0 1 2 3 4 5 6 7 OUTPUT CURRENT (A) 1580 G03 1
