Datasheet LTC3624, LTC3624-2 (Analog Devices)
| Manufacturer | Analog Devices |
| Description | 17V, 2A Synchronous Step-Down Regulator with 3.5μA Quiescent Current |
| Pages / Page | 20 / 1 — FeaTures. DescripTion. Wide VIN Range: 2.7V to 17V. Wide VOUT Range: 0.6V … |
| File Format / Size | PDF / 327 Kb |
| Document Language | English |
FeaTures. DescripTion. Wide VIN Range: 2.7V to 17V. Wide VOUT Range: 0.6V to VIN. 95% Max Efficiency
Model Line for this Datasheet
- LTC3624EDD#PBF LTC3624EDD#TRPBF LTC3624EDD-2#PBF LTC3624EDD-2#TRPBF LTC3624EDD-23.3#PBF LTC3624EDD-23.3#TRPBF LTC3624EDD-25#PBF LTC3624EDD-25#TRPBF LTC3624EDD-3.3#PBF LTC3624EDD-3.3#TRPBF LTC3624EDD-5#PBF LTC3624EDD-5#TRPBF LTC3624EMSE#PBF LTC3624EMSE#TRPBF LTC3624EMSE-2#PBF LTC3624EMSE-2#TRPBF LTC3624EMSE-23.3#PBF LTC3624EMSE-23.3#TRPBF LTC3624EMSE-25#PBF LTC3624EMSE-25#TRPBF LTC3624EMSE-3.3#PBF LTC3624EMSE-3.3#TRPBF LTC3624EMSE-5#PBF LTC3624EMSE-5#TRPBF LTC3624HMSE#PBF LTC3624HMSE#TRPBF LTC3624HMSE-2#PBF LTC3624HMSE-2#TRPBF LTC3624HMSE-23.3#PBF LTC3624HMSE-23.3#TRPBF LTC3624HMSE-25#PBF LTC3624HMSE-25#TRPBF LTC3624HMSE-3.3#PBF LTC3624HMSE-3.3#TRPBF LTC3624HMSE-5#PBF LTC3624HMSE-5#TRPBF LTC3624IDD#PBF LTC3624IDD#TRPBF LTC3624IDD-2#PBF LTC3624IDD-2#TRPBF LTC3624IDD-23.3#PBF LTC3624IDD-23.3#TRPBF LTC3624IDD-25#PBF LTC3624IDD-25#TRPBF LTC3624IDD-3.3#PBF LTC3624IDD-3.3#TRPBF LTC3624IDD-5#PBF LTC3624IDD-5#TRPBF LTC3624IMSE#PBF LTC3624IMSE#TRPBF LTC3624IMSE-2#PBF LTC3624IMSE-2#TRPBF LTC3624IMSE-23.3#PBF LTC3624IMSE-23.3#TRPBF LTC3624IMSE-25#PBF LTC3624IMSE-25#TRPBF LTC3624IMSE-3.3#PBF LTC3624IMSE-3.3#TRPBF LTC3624IMSE-5#PBF LTC3624IMSE-5#TRPBF
Text Version of Document
LTC3624/LTC3624-2 17V, 2A Synchronous Step-Down Regulator with 3.5µA Quiescent Current
FeaTures DescripTion
n
Wide VIN Range: 2.7V to 17V
The LTC®3624/LTC3624-2 is a high efficiency 17V, 2A n
Wide VOUT Range: 0.6V to VIN
synchronous monolithic step-down regulator. The switch- n
95% Max Efficiency
ing frequency is fixed to 1MHz (LTC3624) or 2.25MHz n
Low IQ: 3.5µA, Zero-Current Shutdown
(LTC3624-2) with a ±40% synchronization range. The n
Constant Frequency (1MHz/2.25MHz)
regulator features ultralow quiescent current and high n
Fixed VOUT Options Available
efficiency over a wide VOUT range. n Low Dropout Operation (100% Duty Cycle) with The step-down regulator operates from an input voltage Ultralow IQ range of 2.7V to 17V and provides an adjustable output n 2A Rated Output Current range from 0.6V to VIN while delivering up to 2A of output n ±1% Output Voltage Accuracy current. A user-selectable mode input is provided to allow n Current Mode Operation for Excellent Line and Load the user to trade off ripple noise for light load efficiency; Transient Response Burst Mode operation provides the highest efficiency at n Synchronizable to External Clock light loads, while pulse-skipping mode provides the lowest n Pulse-Skipping, Forced Continuous, Burst Mode® voltage ripple. The MODE pin can also be used to sync the Operation switching frequency to an external clock. n Internal Compensation and Soft-Start
LTC3624/LTC3624-2 Options
n Overtemperature Protection
PART NAME FREQUENCY V
n Compact 8-Lead DFN (3mm × 3mm) Package
OUT
LTC3624 1MHz Adjustable LTC3624-3.3 1MHz 3.3V
applicaTions
LTC3624-5 1MHz 5V LTC3624-2 2.25MHz Adjustable n Battery Powered Equipment LTC3624-23.3 2.25MHz 3.3V n Portable Instrumentation LTC3624-25 2.25MHz 5V n Emergency Radios n General Purpose Step-Down Supplies 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, 6580258, 6498466, 6611131, 6177787, 5705919, 5847554, 6703692.
Typical applicaTion Efficiency and Power Loss vs Load
100 1.2
5V VOUT with 800mA Burst Clamp, fSW = 1MHz
90 1.0 80 VOUT = 5V 3.3µH VOUT VIN POWER LOSS (W) VIN SW 5V 70 BURST MODE OPERATION 5.6V TO 17V 0.8 2A 10µF LTC3624-5 60 RUN FB 47µF 50 0.6 MODE/SYNC 40 INTV 36242 TA01a CC EFFICIENCY (%) 0.4 GND 30 2.2µF 20 VIN = 12V V 0.2 IN = 8V 10 VIN = 6V FREQ = 1MHz 0 0 0 0.5 1 1.5 2 LOAD CURRENT (A) 3624 TA01b 36242fd For more information www.linear.com/LTC3624 1 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Package Description Revision History Typical Application Related Parts
FeaTures DescripTion
n
Wide VIN Range: 2.7V to 17V
The LTC®3624/LTC3624-2 is a high efficiency 17V, 2A n
Wide VOUT Range: 0.6V to VIN
synchronous monolithic step-down regulator. The switch- n
95% Max Efficiency
ing frequency is fixed to 1MHz (LTC3624) or 2.25MHz n
Low IQ: 3.5µA, Zero-Current Shutdown
(LTC3624-2) with a ±40% synchronization range. The n
Constant Frequency (1MHz/2.25MHz)
regulator features ultralow quiescent current and high n
Fixed VOUT Options Available
efficiency over a wide VOUT range. n Low Dropout Operation (100% Duty Cycle) with The step-down regulator operates from an input voltage Ultralow IQ range of 2.7V to 17V and provides an adjustable output n 2A Rated Output Current range from 0.6V to VIN while delivering up to 2A of output n ±1% Output Voltage Accuracy current. A user-selectable mode input is provided to allow n Current Mode Operation for Excellent Line and Load the user to trade off ripple noise for light load efficiency; Transient Response Burst Mode operation provides the highest efficiency at n Synchronizable to External Clock light loads, while pulse-skipping mode provides the lowest n Pulse-Skipping, Forced Continuous, Burst Mode® voltage ripple. The MODE pin can also be used to sync the Operation switching frequency to an external clock. n Internal Compensation and Soft-Start
LTC3624/LTC3624-2 Options
n Overtemperature Protection
PART NAME FREQUENCY V
n Compact 8-Lead DFN (3mm × 3mm) Package
OUT
LTC3624 1MHz Adjustable LTC3624-3.3 1MHz 3.3V
applicaTions
LTC3624-5 1MHz 5V LTC3624-2 2.25MHz Adjustable n Battery Powered Equipment LTC3624-23.3 2.25MHz 3.3V n Portable Instrumentation LTC3624-25 2.25MHz 5V n Emergency Radios n General Purpose Step-Down Supplies 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, 6580258, 6498466, 6611131, 6177787, 5705919, 5847554, 6703692.
Typical applicaTion Efficiency and Power Loss vs Load
100 1.2
5V VOUT with 800mA Burst Clamp, fSW = 1MHz
90 1.0 80 VOUT = 5V 3.3µH VOUT VIN POWER LOSS (W) VIN SW 5V 70 BURST MODE OPERATION 5.6V TO 17V 0.8 2A 10µF LTC3624-5 60 RUN FB 47µF 50 0.6 MODE/SYNC 40 INTV 36242 TA01a CC EFFICIENCY (%) 0.4 GND 30 2.2µF 20 VIN = 12V V 0.2 IN = 8V 10 VIN = 6V FREQ = 1MHz 0 0 0 0.5 1 1.5 2 LOAD CURRENT (A) 3624 TA01b 36242fd For more information www.linear.com/LTC3624 1 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Package Description Revision History Typical Application Related Parts
