Datasheet LTC3526L-2, LTC3526LB-2 (Analog Devices)
| Manufacturer | Analog Devices |
| Description | 550mA 2MHz Synchronous Step-Up DC/DC Converters in 2mm × 2mm DFN |
| Pages / Page | 16 / 1 — Delivers 3.3V at 100mA from a Single Alkaline/. NiMH Cell or 3.3V at … |
| File Format / Size | PDF / 346 Kb |
| Document Language | English |
Delivers 3.3V at 100mA from a Single Alkaline/. NiMH Cell or 3.3V at 200mA from Two Cells. VIN Start-Up Voltage: 680mV
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LTC3526L-2/LTC3526LB-2 550mA 2MHz Synchronous Step-Up DC/DC Converters in 2mm × 2mm DFN FeaTures DescripTion n
Delivers 3.3V at 100mA from a Single Alkaline/
The LTC®3526L-2/LTC3526LB-2 are synchronous, fixed
NiMH Cell or 3.3V at 200mA from Two Cells
frequency step-up DC/DC converters with output discon- n
VIN Start-Up Voltage: 680mV
nect. Synchronous rectification enables high efficiency in n
1.5V to 5.25V VOUT Range
the low profile 2mm × 2mm DFN package. Battery life in n
Up to 94% Efficiency
single AA/AAA powered products is extended further with n
Output Disconnect
a 680mV start-up voltage and operation down to 500mV n
2MHz Fixed Frequency Operation
once started. n
VIN > VOUT Operation
A switching frequency of 2MHz minimizes solution foot- n
Integrated Soft-Start
print by allowing the use of tiny, low profile inductors n Current Mode Control with Internal Compensation and ceramic capacitors. The current mode PWM design n Burst Mode® Operation with 9µA IQ (LTC3526L-2) is internally compensated, reducing external parts count. n Low Noise PWM Operation (LTC3526LB-2) The LTC3526L-2 features Burst Mode operation at light n Internal Synchronous Rectifier load conditions allowing it to maintain high efficiency over n Logic Controlled Shutdown (IQ < 1µA) a wide range of load. The LTC3526LB-2 features fixed n Anti-Ring Control frequency operation for low noise applications. Anti-ring n Low Profile (2mm × 2mm × 0.75mm) 6-Lead circuitry reduces EMI by damping the inductor in discon- DFN Package tinuous mode. Additional features include a low shutdown applicaTions current of under 1µA and thermal shutdown. The LTC3526L-2/LTC3526LB-2 are housed in a 2mm × n Medical Instruments 2mm × 0.75mm DFN package. n Noise Canceling Headphones L, LT, LTC, LTM, Linear Technology, the Linear logo and Burst Mode are registered trademarks and ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the n Wireless Mice property of their respective owners. Patents pending. n Bluetooth Headsets Typical applicaTion
Efficiency and Power Loss vs Load Current
100 1000 2.2µH VIN = 2.4V 90 80 EFFICIENCY 100 SW POWER LOSS (mW) V VOUT 70 IN VIN VOUT 1.6V TO 3.2V 3.3V 200mA 60 10 4.7µF LTC3526L-2 1.78M 33pF 50 OFF ON SHDN FB 4.7µF POWER LOSS 40 1 GND 1M EFFICIENCY (%) 30 3526lb2 TA01a 20 0.1 10 0 0.01 0.01 0.1 1 10 100 1000 LOAD CURRENT (mA) 3526lb2 TA01b 3526lb2fa Document Outline Features Applications Description 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
Delivers 3.3V at 100mA from a Single Alkaline/
The LTC®3526L-2/LTC3526LB-2 are synchronous, fixed
NiMH Cell or 3.3V at 200mA from Two Cells
frequency step-up DC/DC converters with output discon- n
VIN Start-Up Voltage: 680mV
nect. Synchronous rectification enables high efficiency in n
1.5V to 5.25V VOUT Range
the low profile 2mm × 2mm DFN package. Battery life in n
Up to 94% Efficiency
single AA/AAA powered products is extended further with n
Output Disconnect
a 680mV start-up voltage and operation down to 500mV n
2MHz Fixed Frequency Operation
once started. n
VIN > VOUT Operation
A switching frequency of 2MHz minimizes solution foot- n
Integrated Soft-Start
print by allowing the use of tiny, low profile inductors n Current Mode Control with Internal Compensation and ceramic capacitors. The current mode PWM design n Burst Mode® Operation with 9µA IQ (LTC3526L-2) is internally compensated, reducing external parts count. n Low Noise PWM Operation (LTC3526LB-2) The LTC3526L-2 features Burst Mode operation at light n Internal Synchronous Rectifier load conditions allowing it to maintain high efficiency over n Logic Controlled Shutdown (IQ < 1µA) a wide range of load. The LTC3526LB-2 features fixed n Anti-Ring Control frequency operation for low noise applications. Anti-ring n Low Profile (2mm × 2mm × 0.75mm) 6-Lead circuitry reduces EMI by damping the inductor in discon- DFN Package tinuous mode. Additional features include a low shutdown applicaTions current of under 1µA and thermal shutdown. The LTC3526L-2/LTC3526LB-2 are housed in a 2mm × n Medical Instruments 2mm × 0.75mm DFN package. n Noise Canceling Headphones L, LT, LTC, LTM, Linear Technology, the Linear logo and Burst Mode are registered trademarks and ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the n Wireless Mice property of their respective owners. Patents pending. n Bluetooth Headsets Typical applicaTion
Efficiency and Power Loss vs Load Current
100 1000 2.2µH VIN = 2.4V 90 80 EFFICIENCY 100 SW POWER LOSS (mW) V VOUT 70 IN VIN VOUT 1.6V TO 3.2V 3.3V 200mA 60 10 4.7µF LTC3526L-2 1.78M 33pF 50 OFF ON SHDN FB 4.7µF POWER LOSS 40 1 GND 1M EFFICIENCY (%) 30 3526lb2 TA01a 20 0.1 10 0 0.01 0.01 0.1 1 10 100 1000 LOAD CURRENT (mA) 3526lb2 TA01b 3526lb2fa Document Outline Features Applications Description 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
