LTC3528EDDB-2#TRMPBF,LTC3528EDDB-2#TRPBF, 规格书,Datasheet 资料
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LTC3528-2 1A, 2MHz Synchronous Step-Up wk.baidu.comC/DC Converter in 2mm × 3mm DFN FEATURES
Delivers 3.3V at 200mA from a Single Alkaline/ NiMH Cell or 3.3V at 400mA from Two Cells n V Start-Up Voltage: 700mV IN n 0.50V to 5.5V Input Range n 1.6V to 5.25V V OUT Range n Up to 94% Efficiency n Output Disconnect n 2MHz Fixed Frequency Operation n V > V IN OUT Operation n Integrated Soft-Start n Current Mode Control with Internal Compensation n Burst Mode® Operation with 12µA Quiescent Current n Internal Synchronous Rectifier n Logic Controlled Shutdown: <1µA n Anti-Ringing Control n Low Profile (2mm × 3mm × 0.75mm) DFN Package
POWER LOSS
0 0.01
0.1
1
10
100
LOAD CURRENT (mA)
35282 TA01b
35282fb
芯天下--http://oneic.com/
1
LTC3528-2 ABSOLUTE MAXIMUM RATINGS
VIN Voltage.................................................... –0.3V to 6V SW Voltage DC............................................................. –0.3V to 6V Pulsed < 100ns......................................... –0.3V to 7V SHDN, FB Voltage......................................... –0.3V to 6V VOUT.............................................................. –0.3V to 6V PGOOD.......................................................... –0.3V to 6V Operating Junction Temperature Range (Notes 2, 5)............................................. –40°C to 125°C Junction Temperature............................................ 125°C Storage Temperature Range................... –65°C to 125°C
MIN
l l l
TYP 0.70
MAX 5.5 0.88 5.25 5.25
UNITS V V V V V nA µA µA µA µA µA Ω Ω A ns %
35282fb
Operating, Excluding Start-Up ILOAD = 1mA TA = 0°C to 85°C (Note 7) VFB = 1.3V VSHDN = 0V, Not Including Switch Leakage, VOUT = 0V Measured on VOUT, Nonswitching (Note 4) Measured on VOUT , FB > 1.230V VSW = 5V, VOUT = 0V
LTC3528-2 ELECTRICAL CHARACTERISTICS
PARAMETER Minimum Duty Cycle Frequency SHDN Input High Voltage SHDN Input Low Voltage SHDN Input Current PGOOD Threshold Percentage PGOOD Low Voltage PGOOD Leakage Current VSHDN = 1.2V Referenced to Feedback Voltage Falling IPGOOD = 1mA VOUT = 1.6V, IPGOOD = 1mA VPGOOD = 5.5V –7 0.3 –10 0.05 0.05 0.01 CONDITIONS VFB = 1.3V
The l denotes the specifications which apply over the specified operating junction temperature range, otherwise specifications are at TA = 25°C (Note 2). VIN = 1.2V, VOUT = 3.3V, unless otherwise noted.
L, LT, LTC, LTM, Burst Mode, Linear Technology and the Linear logo are registered trademarks and ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners.
35282 TA01a
90 80 EFFICIENCY (%) 70 60 50 40 30 20 10
VOUT = 3.3V VIN = 2.4V EFFICIENCY
1000 100 POWER LOSS (mW) 10 1 0.1 0.01 1000
VIN 1.8V TO 3.2V
VOUT 3.3V 400mA 10µF
APPLICATIONS
n n n
n
Medical Instruments Noise Canceling Headphones Wireless Mice Bluetooth Headsets
TYPICAL APPLICATION
Efficiency and Power Loss
100 2.2µH SW VIN 4.7µF VOUT 499k 68pF LTC3528-2 PGOOD OFF ON SHDN GND FB 287k
(Note 1)
PIN CONFIGURATION
TOP VIEW SHDN 1 FB 2 PGOOD 3 VOUT 4 9 8 VIN 7 SGND 6 PGND 5 SW
DDB PACKAGE 8-LEAD (3mm × 2mm) PLASTIC DFN TJMAX = 125°C, θJA = 76°C/W (NOTE 6) EXPOSED PAD (PIN 9) IS GND, MUST BE SOLDERED TO PCB
ELECTRICAL CHARACTERISTICS
PARAMETER VIN Range Minimum Start-Up Voltage Output Voltage Adjust Range Feedback Voltage Feedback Input Current Quiescent Current—Shutdown Quiescent Current—Active Quiescent Current—Burst P-Channel MOSFET Switch Leakage Current N-Channel MOSFET Switch On Resistance P-Channel MOSFET Switch On Resistance N-Channel MOSFET Current Limit Current Limit Delay Time to Output Maximum Duty Cycle (Note 3) VFB = 1.15V CONDITIONS
ORDER INFORMATION
LEAD FREE FINISH LTC3528EDDB-2#PBF TAPE AND REEL LTC3528EDDB-2#TRPBF PART MARKING LDNZ PACKAGE DESCRIPTION 8-Lead (3mm × 2mm) Plastic DFN TEMPERATURE RANGE –40°C to 125°C Consult LTC Marketing for parts specified with wider operating temperature ranges. Consult LTC Marketing for information on non-standard lead based finish parts. For more information on lead free part marking, go to: http://www.linear.com/leadfree/ For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/
n
DESCRIPTION
The LTC®3528-2 is a synchronous, fixed frequency step-up DC/DC converter with output disconnect. High efficiency synchronous rectification, in addition to a 700mV startup voltage and operation down to 500mV once started, provides longer run-time for single or multiple cell batterypowered products. A switching frequency of 2MHz minimizes solution footprint by allowing the use of tiny, low profile inductors and ceramic capacitors. The current mode PWM is internally compensated, simplifying the design process. The LTC3528-2 enters Burst Mode operation at light loads. Anti-ringing circuitry reduces EMI by damping the inductor in discontinuous mode. Additional features include a low shutdown current, open-drain power good output, short-circuit protection and thermal overload protection. The LTC3528-2 is offered in an 8-lead 2mm × 3mm × 0.75mm DFN package.
0.5 1.7 1.6 1.170 1.200 1 0.01 300 12 0.1 0.1 0.175 0.250
l
1.230 50 1 500 20 10 10
N-Channel MOSFET Switch Leakage Current VSW = 5V
l
1.0 87
1.5 60 92
l
2
芯天下--http://oneic.com/
Delivers 3.3V at 200mA from a Single Alkaline/ NiMH Cell or 3.3V at 400mA from Two Cells n V Start-Up Voltage: 700mV IN n 0.50V to 5.5V Input Range n 1.6V to 5.25V V OUT Range n Up to 94% Efficiency n Output Disconnect n 2MHz Fixed Frequency Operation n V > V IN OUT Operation n Integrated Soft-Start n Current Mode Control with Internal Compensation n Burst Mode® Operation with 12µA Quiescent Current n Internal Synchronous Rectifier n Logic Controlled Shutdown: <1µA n Anti-Ringing Control n Low Profile (2mm × 3mm × 0.75mm) DFN Package
POWER LOSS
0 0.01
0.1
1
10
100
LOAD CURRENT (mA)
35282 TA01b
35282fb
芯天下--http://oneic.com/
1
LTC3528-2 ABSOLUTE MAXIMUM RATINGS
VIN Voltage.................................................... –0.3V to 6V SW Voltage DC............................................................. –0.3V to 6V Pulsed < 100ns......................................... –0.3V to 7V SHDN, FB Voltage......................................... –0.3V to 6V VOUT.............................................................. –0.3V to 6V PGOOD.......................................................... –0.3V to 6V Operating Junction Temperature Range (Notes 2, 5)............................................. –40°C to 125°C Junction Temperature............................................ 125°C Storage Temperature Range................... –65°C to 125°C
MIN
l l l
TYP 0.70
MAX 5.5 0.88 5.25 5.25
UNITS V V V V V nA µA µA µA µA µA Ω Ω A ns %
35282fb
Operating, Excluding Start-Up ILOAD = 1mA TA = 0°C to 85°C (Note 7) VFB = 1.3V VSHDN = 0V, Not Including Switch Leakage, VOUT = 0V Measured on VOUT, Nonswitching (Note 4) Measured on VOUT , FB > 1.230V VSW = 5V, VOUT = 0V
LTC3528-2 ELECTRICAL CHARACTERISTICS
PARAMETER Minimum Duty Cycle Frequency SHDN Input High Voltage SHDN Input Low Voltage SHDN Input Current PGOOD Threshold Percentage PGOOD Low Voltage PGOOD Leakage Current VSHDN = 1.2V Referenced to Feedback Voltage Falling IPGOOD = 1mA VOUT = 1.6V, IPGOOD = 1mA VPGOOD = 5.5V –7 0.3 –10 0.05 0.05 0.01 CONDITIONS VFB = 1.3V
The l denotes the specifications which apply over the specified operating junction temperature range, otherwise specifications are at TA = 25°C (Note 2). VIN = 1.2V, VOUT = 3.3V, unless otherwise noted.
L, LT, LTC, LTM, Burst Mode, Linear Technology and the Linear logo are registered trademarks and ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners.
35282 TA01a
90 80 EFFICIENCY (%) 70 60 50 40 30 20 10
VOUT = 3.3V VIN = 2.4V EFFICIENCY
1000 100 POWER LOSS (mW) 10 1 0.1 0.01 1000
VIN 1.8V TO 3.2V
VOUT 3.3V 400mA 10µF
APPLICATIONS
n n n
n
Medical Instruments Noise Canceling Headphones Wireless Mice Bluetooth Headsets
TYPICAL APPLICATION
Efficiency and Power Loss
100 2.2µH SW VIN 4.7µF VOUT 499k 68pF LTC3528-2 PGOOD OFF ON SHDN GND FB 287k
(Note 1)
PIN CONFIGURATION
TOP VIEW SHDN 1 FB 2 PGOOD 3 VOUT 4 9 8 VIN 7 SGND 6 PGND 5 SW
DDB PACKAGE 8-LEAD (3mm × 2mm) PLASTIC DFN TJMAX = 125°C, θJA = 76°C/W (NOTE 6) EXPOSED PAD (PIN 9) IS GND, MUST BE SOLDERED TO PCB
ELECTRICAL CHARACTERISTICS
PARAMETER VIN Range Minimum Start-Up Voltage Output Voltage Adjust Range Feedback Voltage Feedback Input Current Quiescent Current—Shutdown Quiescent Current—Active Quiescent Current—Burst P-Channel MOSFET Switch Leakage Current N-Channel MOSFET Switch On Resistance P-Channel MOSFET Switch On Resistance N-Channel MOSFET Current Limit Current Limit Delay Time to Output Maximum Duty Cycle (Note 3) VFB = 1.15V CONDITIONS
ORDER INFORMATION
LEAD FREE FINISH LTC3528EDDB-2#PBF TAPE AND REEL LTC3528EDDB-2#TRPBF PART MARKING LDNZ PACKAGE DESCRIPTION 8-Lead (3mm × 2mm) Plastic DFN TEMPERATURE RANGE –40°C to 125°C Consult LTC Marketing for parts specified with wider operating temperature ranges. Consult LTC Marketing for information on non-standard lead based finish parts. For more information on lead free part marking, go to: http://www.linear.com/leadfree/ For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/
n
DESCRIPTION
The LTC®3528-2 is a synchronous, fixed frequency step-up DC/DC converter with output disconnect. High efficiency synchronous rectification, in addition to a 700mV startup voltage and operation down to 500mV once started, provides longer run-time for single or multiple cell batterypowered products. A switching frequency of 2MHz minimizes solution footprint by allowing the use of tiny, low profile inductors and ceramic capacitors. The current mode PWM is internally compensated, simplifying the design process. The LTC3528-2 enters Burst Mode operation at light loads. Anti-ringing circuitry reduces EMI by damping the inductor in discontinuous mode. Additional features include a low shutdown current, open-drain power good output, short-circuit protection and thermal overload protection. The LTC3528-2 is offered in an 8-lead 2mm × 3mm × 0.75mm DFN package.
0.5 1.7 1.6 1.170 1.200 1 0.01 300 12 0.1 0.1 0.175 0.250
l
1.230 50 1 500 20 10 10
N-Channel MOSFET Switch Leakage Current VSW = 5V
l
1.0 87
1.5 60 92
l
2
芯天下--http://oneic.com/