Datasheet LTC3607 (Analog Devices)
| Hersteller | Analog Devices |
| Beschreibung | Dual 600mA 15V Monolithic Synchronous Step-Down DC/DC Regulator |
| Seiten / Seite | 20 / 1 — FeaTures. DescripTion. High Efficiency: Up to 96%. Very Low Quiescent … |
| Dateiformat / Größe | PDF / 374 Kb |
| Dokumentensprache | Englisch |
FeaTures. DescripTion. High Efficiency: Up to 96%. Very Low Quiescent Current: 55µA Total. 2.25MHz Constant Frequency Operation
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LTC3607 Dual 600mA 15V Monolithic Synchronous Step-Down DC/DC Regulator
FeaTures DescripTion
n
High Efficiency: Up to 96%
The LTC®3607 is a 15V dual 600mA monolithic synchro- n
Very Low Quiescent Current: 55µA Total
nous step-down regulator which has only 55µA quiescent n
2.25MHz Constant Frequency Operation
current. Intended for a variety of applications, including n
Low Dropout Operation: 100% Duty Cycle
dual lithium-ion battery products, it operates from a wide n
Low-Ripple (Typical 30mVP-P) Burst Mode®
4.5V to 15V input voltage range. It features a constant
Operation
2.25MHz switching frequency, enabling the use of tiny, n Peak Current-Mode Control Architecture for Excel ent low cost capacitors and inductors 1mm or less in height. Line and Load Transient Response Each output voltage is adjustable from 0.6V to VIN. The n Wide Voltage Input Range: 4.5V to 15V internal synchronous power switches provide high ef- n 600mA/Channel Rated Output Current ficiency without the need for external Schottky diodes. n 0.6V Reference Al ows Low Output Voltages A user selectable mode input is provided to al ow the user n ±1.5% Output Voltage Accuracy to trade off ripple noise for light load efficiency; Burst n Ultralow Shutdown Current: IQ < 1µA Mode operation provides the highest efficiency at light n Internal Compensation loads, while pulse-skipping mode provides the lowest n Power Good Outputs ripple noise. n External y Frequency Synchronization (1MHz to 4MHz) n Independent Internal Soft-Start for Each Channel To further the maximize battery run time, the P-channel n Small 16-Lead Thermal y Enhanced Thin QFN MOSFETs are turned on continuously in dropout (100% (3mm × 3mm) and MSE Packages duty cycle). In shutdown, the device draws <1µA.
applicaTions
L, LT, LTC, LTM, Burst Mode, Linear Technology and the Linear logo are registered trademarks and Hot Swap is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. Protected by U.S. Patents, including 5481178, 5847554, 6580258, 6304066, 6476589, 6774611. n Dual Lithium-Ion Battery Supplies n Automotive Applications n Servers
Typical applicaTion Efficiency and Power Loss vs Load Current
VIN 12V 100 1 V 10µF IN = 12V 90 ×2 PVIN1 SVIN PVIN2 80 RUN1 RUN2 70 POWER LOSS (W) 4.7µH 0.1 V LTC3607 4.7µH OUT1 SW1 SW2 VOUT2 60 5V AT 600mA 3.3V AT 600mA 22pF 22pF 50 40 EFFICIENCY (%) 0.01 887k 549k 30 VFB1 VFB2 20 10µF 121k GND 121k 10µF 10 VOUT = 5V VOUT = 3.3V 0 0.001 3607 TA01a 1 10 100 1000 LOAD CURRENT (mA) 3607 TA01b 3607fb For more information www.linear.com/LTC3607 1 Document Outline Features Description Applications Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Revision History Typical Application Related Parts
FeaTures DescripTion
n
High Efficiency: Up to 96%
The LTC®3607 is a 15V dual 600mA monolithic synchro- n
Very Low Quiescent Current: 55µA Total
nous step-down regulator which has only 55µA quiescent n
2.25MHz Constant Frequency Operation
current. Intended for a variety of applications, including n
Low Dropout Operation: 100% Duty Cycle
dual lithium-ion battery products, it operates from a wide n
Low-Ripple (Typical 30mVP-P) Burst Mode®
4.5V to 15V input voltage range. It features a constant
Operation
2.25MHz switching frequency, enabling the use of tiny, n Peak Current-Mode Control Architecture for Excel ent low cost capacitors and inductors 1mm or less in height. Line and Load Transient Response Each output voltage is adjustable from 0.6V to VIN. The n Wide Voltage Input Range: 4.5V to 15V internal synchronous power switches provide high ef- n 600mA/Channel Rated Output Current ficiency without the need for external Schottky diodes. n 0.6V Reference Al ows Low Output Voltages A user selectable mode input is provided to al ow the user n ±1.5% Output Voltage Accuracy to trade off ripple noise for light load efficiency; Burst n Ultralow Shutdown Current: IQ < 1µA Mode operation provides the highest efficiency at light n Internal Compensation loads, while pulse-skipping mode provides the lowest n Power Good Outputs ripple noise. n External y Frequency Synchronization (1MHz to 4MHz) n Independent Internal Soft-Start for Each Channel To further the maximize battery run time, the P-channel n Small 16-Lead Thermal y Enhanced Thin QFN MOSFETs are turned on continuously in dropout (100% (3mm × 3mm) and MSE Packages duty cycle). In shutdown, the device draws <1µA.
applicaTions
L, LT, LTC, LTM, Burst Mode, Linear Technology and the Linear logo are registered trademarks and Hot Swap is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. Protected by U.S. Patents, including 5481178, 5847554, 6580258, 6304066, 6476589, 6774611. n Dual Lithium-Ion Battery Supplies n Automotive Applications n Servers
Typical applicaTion Efficiency and Power Loss vs Load Current
VIN 12V 100 1 V 10µF IN = 12V 90 ×2 PVIN1 SVIN PVIN2 80 RUN1 RUN2 70 POWER LOSS (W) 4.7µH 0.1 V LTC3607 4.7µH OUT1 SW1 SW2 VOUT2 60 5V AT 600mA 3.3V AT 600mA 22pF 22pF 50 40 EFFICIENCY (%) 0.01 887k 549k 30 VFB1 VFB2 20 10µF 121k GND 121k 10µF 10 VOUT = 5V VOUT = 3.3V 0 0.001 3607 TA01a 1 10 100 1000 LOAD CURRENT (mA) 3607 TA01b 3607fb For more information www.linear.com/LTC3607 1 Document Outline Features Description Applications Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Revision History Typical Application Related Parts